taxonID	type	description	language	source
00270D7C9236FFE3FF2DF9679174FECD.taxon	type_taxon	Type species: Pterochilus mauritanicus Lepeletier de Saint-Fargeau, 1841, by subsequent designation of Ashmead 1902: 209 (as “ Pterochilus mauritianus ”).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9236FFE3FF2DF9679174FECD.taxon	diagnosis	Diagnosis. Belonging to the group of genera of Odynerini s. l. without cephalic foveae in the female, with a basally obtuse second submarginal cell, and with an apical lamella of T 2 (although may be reduced in the subgenus Zendalia), known as clade D sensu Bank et al. (2017). Distinguished from other genera by the following combination of characters: head shorter or not much longer than wide; proboscis usually not reaching mid coxae; thorax not much longer than wide; pronotal carina usually present; tegula protruding posteriorly; metanotum sharply edged posteriorly (in most species); submarginal carina produced in a lobe above the valvula, which is not completely fused to the propodeum; T 1 hardly petiolate, depressed subapically; apical lamella of T 2 with basal row of small to large punctures. Representatives of the genus are usually very small wasps (except subgenera Leptochilus s. str. and Euleptochilus, which comprise rather medium-sized ones).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9235FFE5FF2DFEAB91FEF93B.taxon	description	(Figs 1 A – C, F, H, 2 A – C)	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9235FFE5FF2DFEAB91FEF93B.taxon	diagnosis	Diagnosis. The species belongs to a group of the genus Leptochilus with tegula length exceeding the length of the scutellum (subgenus Euleptochilus). Leptochilus barkalovi is closely related to L. limbiferus (Morawitz, 1867) but the male of this new species has a narrower clypeus (1.05 × as wide as long vs. 1.2 × as wide as long in L. limbiferus, Fig. 1 E), blunter pronotal angles (vs. nearly rectangular in L. limbiferus, Fig. 1 G), a longer pilosity on head and mesosoma (as long as F 1 vs. about as long as the diameter of F 1 at distal end in L. limbiferus, Fig. 1 G), a light-colored apical lamella of the tergum 2 (vs. dark brown in at least eastern populations of L. limbiferus, Fig. 1 D), as well as a different structure of the flagellomere 11 (reaching central area of F 8 in L. barkalovi but distal end of F 8 in L. limbiferus, Fig. 1 I) and of the aedeagus (apex deeper bifurcated in L. limbiferus, ventral lobe relatively shorter in L. limbiferus, Fig. 2 E, F). The body pattern is also different: L. limbiferus has a yellow spot on the dorsal mesepisternum and all the legs ferruginous from the distal half of the femora to tarsomeres 4 (Fig. 1 D).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9235FFE5FF2DFEAB91FEF93B.taxon	description	Description. Female. Unknown. Male. Body length (from head to apical margin of T 2) about 5.5 mm; forewing length 4.5 mm. Head about 1.05 × as wide as long in frontal view. Mandible with four teeth. Labial palpus not modified. Clypeus about 1.05 × as wide as long, its apical emargination about 0.7 × as deep as wide, taking less than 1 / 4 of clypeal width, apical teeth bluntly rounded. F 11 parallel-sided, curved, and broadly rounded apically, reaching central area of F 8; distal part of F 8 and basal part of F 9 with depression housing apex of F 11. Distance between lateral ocellus and occipital margin exceeding distance between lateral ocellus and eye. Occipital carina not forming angle at lower part of gena. Anterior pronotal carina strongly developed but not lamellate, shoulders rather blunt. Tegula with outer margin broadly rounded posteriorly, longer than scutellum. Scutellum slightly elevated and flattened dorsally. Metanotum not raised above scutellum, sharply edged posteriorly. Hind trochanter rounded posteriorly. Propodeum with indistinct dorsal surface only; propodeal concavity with rounded lateral margins; median carina developed at lower third of propodeal concavity. Projection of submarginal carina of propodeum not longer than wide and not longer than valvula, bluntly rounded apically; valvula rounded. Apical lamella of T 2 semitransparent, with basal row of very small rounded punctures, interstices not sclerotized. S 2 in lateral view rather abruptly elevated at base, in ventral view without longitudinal furrow. S 7 with most area flattened. Genitalia as in Fig. 2 A – C. Digitus long and curved, rather pointed apically; aedeagus with incision at apex and large ventral lobe taking about one third of whole aedeagus length. Clypeus densely micropunctate, dull, without macropunctures. Punctures on frons and vertex coarse and dense, interstices shorter than one puncture diameter, with distinct microsculpture; gena with somewhat finer punctures than on frons and vertex, interstices still shorter than one puncture diameter and with similar microsculpture. Dorsal surface of pronotum punctate similarly to vertex. Scutum and scutellum with coarser, nearly comb-like sculpture, interstices are much shorter than one puncture diameter, reduced to edges between punctures, which sometimes form longitudinal rows. Tegula shining, with microsculpture only. Dorsal mesepisternum and mesepimeron punctate finer than scutum and scutellum, interstices slightly broader and with distinct microsculpture. Ventral mesepisternum punctate similarly to scutum and scutellum but punctures not forming rows. Epicnemium mostly shagreened, without punctures. Metanotum with punctures on upper part of posterior side and microsculpture only on lower part. Metapleuron longitudinally rugose. Dorsolateral surface of propodeum dull, with hardly visible shallow punctures and distinct microsculpture. Lateral surface of propodeum longitudinally rugose; sculpture of propodeal concavity similar to that on lateral surface. T 1 and T 2 with sparse scattered punctures, interstices reaching several puncture diameters, with dense microsculpture. S 1 densely punctate, interstices reaching one puncture diameter. S 2 punctate similarly to T 2. Following terga and sterna without distinct punctures, mostly with dull microsculpture. Posterior side of mandible with few straight pale setae as long as diameter of F 1 at distal end. Clypeus and scapus with appressed whitish setae as long as diameter of F 1 at base. Labial palpus with few very minute setae only. Frons, vertex, gena, dorsal, lateral, and posterior surfaces of mesosoma with straight pale setae approximately as long as F 1. Ventral surface of mesosoma and whole metasoma with mostly short appressed setae; S 1 – S 6 with additional few straight setae as long as diameter of F 1 at distal end. Basal color black. Clypeus, anterior surface of scapus, anterior band on pronotum (interrupted medially), most part of tegula (except inner margin), and outer surface of tibiae ivory. Apical bands of T 1, T 2, and S 2 yellowish. Ventral side of F 8 and F 9, depression of F 8 and F 9, and entire F 10 and F 11 ferruginous. Fore tarsus except claws, mid tarsus except distal half of tarsomere 5, and hind tarsomere 4 brownish-yellow; inner side of hind tibia and entire hind tarsomeres 1 – 3 brown. Wings strongly fuscous, particularly on marginal cell; veins dark brown.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9235FFE5FF2DFEAB91FEF93B.taxon	materials_examined	Material examined. HOLOTYPE: ♂, labeled “ 16.4.1987 ТуркмениЯ / окр. Ашхабада / ФирЮЗинское уЩ. / Баркалов А. [Turkmenistan, vicinity of Asghabad, Firyuza Gorge, leg. A. Barkalov] // Holotypus ♂ / Leptochilus barkalovi / Fateryga [red label] ” [ISEN].	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9235FFE5FF2DFEAB91FEF93B.taxon	etymology	Etymology. The species name is honoring Anatolij V. Barkalov, the collector of the holotype and a well-known Soviet and Russian entomologist.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9235FFE5FF2DFEAB91FEF93B.taxon	distribution	Distribution. Turkmenistan (known from the type locality only).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9233FFE6FF2DF8F991E9FBC1.taxon	description	(Fig. 3 A – H)	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9233FFE6FF2DF8F991E9FBC1.taxon	diagnosis	Diagnosis. The species belongs to a group of the subgenus Lionotulus with pronotal carina lamellate, metanotum sharply edged posteriorly, hind trochanter rounded posteriorly, and apical lamella of T 2 not largely sclerotized, with rather rounded basal punctures; it can be recognized, among similar species occurring in the northeastern part of Central Asia, by the occipital carina forming a distinct obtuse angle at the lower part of the gena, the anterior pronotal carina not concave medially, the median carina developed at lower half of the propodeal concavity, and the wings fully transparent.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9233FFE6FF2DF8F991E9FBC1.taxon	description	Description. Female. Body length (from head to apical margin of T 2) 5 mm; forewing length 4.5 mm. Head about 1.15 × as wide as long in frontal view. Mandible with four teeth. Labial palpus not modified. Clypeus about 1.4 × as wide as long, its apical emargination very shallow, taking less than 1 / 4 of clypeal width, apical teeth acute and strongly carinate. Distance between lateral ocellus and occipital margin exceeding distance between lateral ocellus and eye. Occipital carina forming distinct blunt angle at lower part of gena. Anterior pronotal carina strongly lamellate; lamella as high as half diameter of ocellus, interrupted medially. Tegula with outer margin rounded posteriorly, about as long as scutellum. Scutellum rather evenly convex. Metanotum not raised above scutellum, sharply edged posteriorly. Hind trochanter rounded posteriorly. Propodeum with indistinct dorsal surface only; propodeal concavity with rounded lateral margins; median carina developed at lower half of propodeal concavity. Projection of submarginal carina of propodeum longer than wide, bluntly rounded apically; valvula rounded. Apical lamella of T 2 semitransparent, with basal row of rounded to slightly elongated punctures, interstices sclerotized up to at most 1 / 3 of lamella. T 3 and T 4 with similar but indistinct apical lamellae. S 2 in lateral view roundly elevated at base, in ventral view with distinct longitudinal furrow. Clypeus densely punctate with shallow punctures, more coarsely on apical part; interstices mostly not reaching puncture diameter, with microsculpture. Punctures on frons and vertex more distinct than on clypeus, interstices reaching one puncture diameter, shining, with little microsculpture; gena with somewhat finer punctures than on frons and vertex and similar microsculpture. Dorsal surface of pronotum punctate similarly to vertex; punctures become coarser on scutum and scutellum, interstices reaching one puncture diameter, shining, with few microsculpture. Tegula shining, with microsculpture only. Dorsal mesepisternum, ventral mesepisternum, and mesepimeron with punctures somewhat smaller than those on pronotum, interstices reaching several puncture diameters, shining, with microsculpture. Epicnemium shagreened, without distinct punctures. Metanotum with coarse punctures on upper part of posterior side and weak microsculpture only on lower part. Metapleuron longitudinally rugose. Dorsolateral surface of propodeum dull, with hardly visible shallow dense punctures and dense microsculpture. Lateral surface of propodeum longitudinally rugose; sculpture of propodeal concavity similar to that on lateral surface but interstices shining. T 1 and T 2 sparsely punctate with small shallow punctures, interstices reaching several puncture diameters, with dense microsculpture. S 1 coarsely rugose longitudinally. S 2 punctate similarly to T 2. Following terga and sterna without distinct punctures, with dull microsculpture only. Posterior side of mandible with straight pale setae somewhat longer than F 1. Lower half of frons, basal half of clypeus, and dorsolateral surface of propodeum with dense silver appressed setae. Upper half of frons and apical half of clypeus with straight pale setae as long as diameter of F 1 at distal end. Scapus and gena with very short setae only. Labial palpus with several setae as long as diameter of F 1 at distal end. Vertex and dorsal surface of mesosoma with straight setae about as long as diameter of F 1 at base. Ventral surface of mesosoma and whole metasoma with short appressed setae only. Basal color black. Following parts pale yellow: basal half of clypeus, anterior side of scapus, anterior band on pronotum (interrupted medially), spot on dorsal mesepisternum, tegula (except central brownish spot), parategula, band on metanotum, lateral spots on propodeum, apical band on T 1 enlarged laterally, lateral spots and apical band on T 2, narrow apical band on S 2, central spots on distal ends of T 3 and T 4, distal ends of femora, entire tibiae. Ventral side of antenna ferruginous. Tarsi brownish-yellow. Wings transparent; veins light brown. Male. Body length (from head to apical margin of T 2) 4.5 mm; forewing length 4 mm. Structure resembles that in female except the following: head about 1.1 × as wide as long in frontal view; clypeus about 1.1 × as wide as long, its apical emargination about 0.5 × as deep as wide, taking about 1 / 5 of clypeal width; F 11 rather triangular, pointed apically, reaching apical margin of F 8; F 9 with shallow depression housing apex of F 11. S 7 with most area flattened. Digitus long, narrow, and rather pointed apically. Sculpture similar to that in female but clypeus very dull, without visible punctures, with microsculpture only. Setae mostly as in female but clypeus entirely covered with dense white appressed setae as long as diameter of F 1 at base; labial palpus without long setae. Coloration mostly as in female but clypeus entirely whitish-yellow; spots on dorsal mesepisternum, propodeum, and T 2 absent; scutellum, S 2, T 3, and T 4 also black. Depression of F 9 and entire F 10 and F 11 ferruginous.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9233FFE6FF2DF8F991E9FBC1.taxon	materials_examined	Material examined. HOLOTYPE: ♀, labeled “ Баинхудук / с. Алашань / КОЗЛОв 20 V 909 [Bainkhuduk, N Alashan, leg. P. Kozlov, 20. V. 1909] // incertus Typ. ♀ / G Kostylev det. 36 // Holotypus [red label] ” [ZISP]. ADDITIONAL MATERIAL: MONGOLIA: Ömnögovi Province, Undyn-Gol Ravine, 25 km S Mt. Khan-Bogdo, 7. VIII. 1971, 1 ♂, leg. I. Kerzhner [ZISP].	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9233FFE6FF2DF8F991E9FBC1.taxon	distribution	Distribution. Mongolia (new record); China: Inner Mongolia.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9233FFE6FF2DF8F991E9FBC1.taxon	discussion	Remarks. The genitalia of this species are not illustrated because the examined male specimen lacks a major part of the aedeagus, for unknown reason. Leptochilus incertus is apparently closely related to a recently described L. angulus Bai, Chen & Li, 2024, from Inner Mongolia as well. The latter species differs from L. incertus by the anterior pronotal carina concave medially, the black scapus in the female, and fuscous wings (Bai et al. 2024). Leptochilus incertus is also very similar to L. locuples sensu Bai et al. (2024) from Gansu. The latter misidentified specimen has, however, somewhat longer clypeus, not developed median carina of the propodeum, and a yellow band on the metanotum (Bai et al. 2024). More material is required to ascertain whether L. locuples sensu Bai et al. (2024) is conspecific with L. incertus or represents a separate species. The true L. locuples Giordani Soika, 1970 is distributed in Turkmenistan and Uzbekistan (Fateryga et al. 2023) and probably does not occur in China; it differs from the misidentified specimen by many characters, including the occipital carina not forming an angle at the lower part of the gena and a very different color pattern. The third species with the occipital carina forming a distinct obtuse angle at the lower part of the gena in the paper by Bai et al. (2024) is also misidentified. It is reported as L. callidus (Kostylev, 1940) but the true L. callidus differs from it by many characters, including the occipital carina not forming an angle at the lower part of the gena, a lamellate pronotal carina, and a different color pattern; it is distributed in Iran, Uzbekistan, and Kazakhstan (Fateryga et al. 2023). Leptochilus callidus sensu Bai et al. (2024) differs from L. incertus, first of all, by the pronotal carina not lamellate. Both true L. locuples and true L. callidus has hind trochanter sharply edged posteriorly while it is rounded posteriorly in L. incertus. The structure of the hind trochanter of L. angulus, L. locuples sensu Bai et al. (2024), and L. callidus sensu Bai et al. (2024) is not reported.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9230FFEBFF2DFBA7971AF94C.taxon	description	(Figs 2 G – I, 4 A – D, 5 B, C)	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9230FFEBFF2DFBA7971AF94C.taxon	diagnosis	Diagnosis. The species belongs to a group of the subgenus Lionotulus with pronotal carina lamellate, metanotum sharply edged posteriorly, hind trochanter rounded posteriorly, and apical lamella of T 2 not sclerotized, with small and rounded basal punctures; it can be recognized, among the species occurring in the northeastern part of Central Asia, by a relatively small size, comparatively fine punctation, and a dark body pattern.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9230FFEBFF2DFBA7971AF94C.taxon	description	Description. Female. Body length (from head to apical margin of T 2) 4.5 – 5 mm; forewing length 4 – 4.5 mm. Head about 1.1 × as wide as long in frontal view. Mandible with four teeth. Labial palpus not modified. Clypeus about 1.3 × as wide as long, its apical emargination shallow, about 0.3 × as deep as wide, taking about 1 / 5 of clypeal width, apical teeth triangular, weakly carinate. Distance between lateral ocellus and occipital margin equal to distance between lateral ocellus and eye. Occipital carina not forming angle at lower part of gena. Anterior pronotal carina strongly developed, weakly lamellate, shoulders blunt. Tegula with outer margin rounded posteriorly, shorter than scutellum. Scutellum rather flat. Metanotum slightly raised above scutellum, sharply edged posteriorly. Hind trochanter rounded posteriorly. Propodeum with indistinct dorsal surface only; propodeal concavity with rounded lateral margins; median carina developed at lower third of propodeal concavity. Projection of submarginal carina of propodeum longer than wide, bluntly rounded apically; valvula rounded. Apical lamella of T 2 semitransparent, with basal row of very small rounded punctures, interstices not sclerotized. S 2 in lateral view roundly elevated at base, in ventral view with weak longitudinal furrow. Clypeus densely punctate, interstices reaching one puncture diameter, with microsculpture. Punctures on frons and vertex strongly larger than those on clypeus, interstices usually shorter than one puncture diameter, with distinct microsculpture; gena with somewhat finer punctures than on frons and vertex and similar microsculpture. Dorsal surface of pronotum punctate similarly to vertex; punctures become coarser on scutum and scutellum, interstices reaching one puncture diameter, with microsculpture; punctures forming some longitudinal rows on posterior part of scutum and scutellum. Tegula shining, with microsculpture only. Dorsal mesepisternum and mesepimeron punctate as pronotum or somewhat sparser. Ventral mesepisternum with sparse punctures, interstices reaching several puncture diameters, with microsculpture but shining. Epicnemium shagreened, without punctures. Metanotum with coarse punctures on upper part of posterior side and microsculpture only on lower part. Metapleuron longitudinally rugose. Dorsolateral surface of propodeum dull, with hardly visible shallow punctures and microsculpture. Lateral surface of propodeum longitudinally rugose but with hardly visible sparse punctures, interstices rather dull; sculpture of propodeal concavity similar to that on lateral surface but interstices shining. T 1 densely punctate with shallow punctures, interstices reaching two puncture diameters on dorsal surface, dull, with very dense microsculpture. S 1 coarsely rugose longitudinally. T 2 and S 2 with finer and much sparser punctures than on T 1, interstices reaching several puncture diameters, with similar microsculpture. Following terga and sterna without distinct punctures, with dull microsculpture only. Posterior side of mandible with straight pale setae somewhat longer than F 1. Clypeus with setae as long as diameter of F 1 at distal end. Frons with straight setae somewhat shorter than F 1. Scapus and labial palpus with setae as long as diameter of F 1 at base. Gena with even shorter setae. Vertex and dorsal surface of mesosoma with straight setae about as long as diameter of scapus at distal end. Ventral surface of mesosoma and whole metasoma with short appressed setae only. Basal color black. Apical bands of T 1 and T 2 ivory. Outer margin of tegula ferruginous or brownish-yellow. Legs from distal ends of femora onwards ferruginous. Wings strongly fuscous, particularly on marginal cell; veins dark brown. Male. Body length (from head to apical margin of T 2) 4 mm; forewing length 3.5 mm. Structure resembles that in female except the following: clypeus about 1.15 × as wide as long, its apical emargination about 0.6 × as deep as wide, taking less than 1 / 5 of clypeal width; F 11 parallel-sided and broadly rounded apically, reaching apical margin of F 8; F 9 with deep depression housing apex of F 11. S 7 with most area flattened. Genitalia as in Fig. 2 G – I. Digitus short and rounded apically; aedeagus with comparatively small and rounded ventral lobe. Sculpture similar to that in female but clypeus very dull, without visible punctures, with microsculpture only. Setae mostly as in female but clypeus covered with dense white appressed setae as long as diameter of F 1 at base; labial palpus without long setae. Coloration mostly as in female but clypeus and anterior surface of scapus whitish-yellow. Ventral side of distal half of flagellum, depression of F 9, and entire F 10 and F 11 ferruginous.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9230FFEBFF2DFBA7971AF94C.taxon	materials_examined	Material examined. HOLOTYPE: ♀, labeled “ Республика Алтай, Кош- / Агачский р-н, 5 км ЮВ с. / ЧаганУЗун, р. ТуЯрык / 11. VII. 2016, Локтионов, / ПроЩалыкин [Altai Republic, Kosh-Agach District, 5 km SE Chagan-Uzun, Tydtuyaryk River, 11. VII. 2016, leg. V. Loktionov, M. Proshchalykin] // N 50 ° 04,367 ’ E 088 ° 25,193 ’ 1780 m // Leptochilus ♀ / (Lionotulus) sp. / det. A. Fateryga, 2017 // Holotypus ♀ / Leptochilus leleji / Fateryga [red label] ” [ZISP]. PARATYPE: same data as holotype, 1 ♀ [CAFK]. ADDITIONAL MATERIAL: RUSSIA. Altai Republic: 5 km SE Chagan-Uzun, Tydtuyaryk River valley, 50 ° 04 ′ 25 ″ N, 88 ° 25 ′ 12 ″ E, 8. VII. 2019, 1 ♀, leg. A. Fateryga [CAFK]; ibid., 9. VII. 2019, 7 ♀, leg. A. Fateryga [1 ♀ AMNH, 1 ♀ OLML, 5 ♀ CAFK]; ibid., 12. VI. 2022, on Sibbaldianthe bifurca, 2 ♀, leg. A. Fateryga [CAFK]; ibid., 18. VI. 2022, on Sibbaldianthe bifurca, 1 ♀, 1 ♂, leg. A. Fateryga [CAFK]; ibid., 21. VI. 2022, 2 ♀, leg. M. Proshchalykin [CAFK]; “ Mars ”, 50 ° 03 ′ 50 ″ N, 88 ° 18 ′ 45 ″ E, 25. VI. 2022, 1 ♀, leg. A. Fateryga [CAFK]; 5 km NE Kokorya, 49 ° 57 ′ 00 ″ N, 89 ° 04 ′ 19 ″ E, 26. VI. 2022, 1 ♀, leg. A. Fateryga, 1 ♀, leg. M. Proshchalykin [CAFK]. Tyva Republic: vicinity of Kyzyl, 4 – 8. VI. 1989, 1 ♀, leg. D. Logunov [ISEN].	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9230FFEBFF2DFBA7971AF94C.taxon	distribution	Distribution. Russia: Altai Republic, Tyva Republic (new record).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C9230FFEBFF2DFBA7971AF94C.taxon	discussion	Remarks. This species was described as somewhat similar to L. alpestris (de Saussure, 1855) (Fateryga & Mokrousov 2019); however, they are not closely related. The male of L. leleji has completely different apex of flagellum and genitalia. F 11 of L. alpestris is thin, rather triangular, acutely pointed apically; F 9 does not have so deep depression housing apex of F 11. The digitus of L. alpestris is long, narrow, and rather pointed apically (Fig. 2 J); aedeagus is with long ventral lobe, which is rather pointed apically and highly sclerotized along posterior margin (Fig. 2 L). Field observations. Females of L. leleji were observed in the Altai Mountains (Fig. 5 A) feeding at flowers of Sibbaldianthe bifurca (L.) Kurtto & T. Erikss. (Rosaceae), including both freshly opened ones and those from which petals had already felt down (Fig. 5 B). Frontal side of the head of these females was found to be covered by pollen of apparently this plant species, suggesting that L. leleji took part in its pollination. Females were also observed licking the surface of an entomological net, both the bag and the handle (Fig. 5 C), similarly to the previously observed females and males of L. limbiferus in the Caucasus (Fateryga et al. 2020). The purpose of such a behavior is unclear. Obviously, L. leleji does not nest in empty snail shells, like several other species of Leptochilus do (Fateryga 2013; Fateryga et al. 2020), because there were no terrestrial snails observed in the habitats of this species.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923DFFEAFF2DF92B930BF80D.taxon	description	(Fig. 4 E – H)	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923DFFEAFF2DF92B930BF80D.taxon	diagnosis	Diagnosis. The species belongs to a group of the subgenus Lionotulus with pronotal carina lamellate, metanotum sharply edged posteriorly, hind trochanter rounded posteriorly, and apical lamella of T 2 not largely sclerotized, with rounded basal punctures; the only other species with such combination of characters known in the Caucasus is L. signatus Gusenleitner, 1995 (although the structure of its hind trochanter is not reported), which can be distinguished by a broader apical emargination of the clypeus and a yellow band on the scutellum.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923DFFEAFF2DF92B930BF80D.taxon	description	Description. Female. Body length (from head to apical margin of T 2) 6 mm; forewing length 4 mm. Head about 1.15 × as wide as long in frontal view. Mandible with four teeth. Labial palpus very slightly enlarged. Clypeus about 1.3 × as wide as long, its apical emargination very shallow, taking 1 / 5 of clypeal width, apical teeth triangular, strongly carinate. Distance between lateral ocellus and occipital margin significantly exceeding distance between lateral ocellus and eye. Occipital carina not forming angle at lower part of gena. Anterior pronotal carina strongly developed, weakly lamellate, shoulders roundly rectangular. Tegula with outer margin rounded posteriorly, as long as scutellum. Scutellum rather flat. Metanotum slightly raised above scutellum, sharply edged posteriorly. Hind trochanter rounded posteriorly. Propodeum with indistinct dorsal surface only; propodeal concavity with rounded lateral margins; median carina developed at lower half of propodeal concavity. Projection of submarginal carina of propodeum longer than wide, bluntly rounded apically; valvula nearly rectangular. Apical lamella of T 2 semitransparent, with basal row of rounded punctures, interstices sclerotized up to at most 1 / 3 of lamella. S 2 in lateral view rather roundly elevated at base, in ventral view without longitudinal furrow. Clypeus densely punctate and longitudinally rugose, interstices reaching one puncture diameter, with microsculpture. Punctures on frons and vertex strongly larger than those on clypeus, interstices usually shorter than one puncture diameter, with distinct microsculpture; gena with somewhat finer punctures than on frons and vertex and similar microsculpture. Dorsal surface of pronotum punctate similarly to vertex; punctures become coarser on scutum and scutellum, interstices shorter than one puncture diameter, with microsculpture; punctures sometimes forming longitudinal rows. Tegula shining, with microsculpture only. Dorsal mesepisternum and mesepimeron punctate as pronotum. Ventral mesepisternum with sparser punctures, interstices reaching one puncture diameter, with microsculpture but shining. Epicnemium shagreened, without punctures. Metanotum with punctures on upper part of posterior side and microsculpture only on lower part. Metapleuron longitudinally rugose. Dorsolateral surface of propodeum dull, with hardly visible shallow punctures and microsculpture. Lateral surface of propodeum longitudinally rugose, with indistinct sparse punctures; sculpture of propodeal concavity similar to that on lateral surface but without visible punctures. T 1 and T 2 densely punctate with coarse punctures, interstices reaching one puncture diameter, with very distinct microsculpture. S 1 coarsely rugose longitudinally. S 2 punctate similarly to T 2. Following terga and sterna with few distinct punctures only, mostly with dull microsculpture. Posterior side of mandible with straight pale setae about as long as F 1. Labial palpus with several setae as long as diameter of F 1 at base or slightly longer but not exceeding diameter of F 1 at distal end. Clypeus, frons, scapus, vertex, gena, and dorsal surface of mesosoma with very short straight setae, shorter than diameter of F 1 at base. Ventral surface of mesosoma and whole metasoma with short appressed setae only. Basal color black. Lateral spots on pronotum, tegula (except central brownish spot), and apical bands of T 1 and T 2 pale yellow. Ventral side of flagellum and legs from femora onwards ferruginous. Wings strongly fuscous, particularly on marginal cell; veins dark brown. Male. Unknown.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923DFFEAFF2DF92B930BF80D.taxon	materials_examined	Material examined. HOLOTYPE: ♀, labeled “ Ordubad (Arax) / Reitter / 1892 // Microdynerus ♀ / macrocephalus, n. sp / G. Kostylev det. 1931 // Holotypus [red label] ” [ZISP]. ADDITIONAL MATERIAL: ARMENIA: Kotaik, Jelidja, 7100 ʹ, 24. VII. 1928, 1 ♀, leg. A. Schelkownikow [ZMMU].	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923DFFEAFF2DF92B930BF80D.taxon	distribution	Distribution. Armenia (new record), Azerbaijan.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923DFFEAFF2DF92B930BF80D.taxon	discussion	Remarks. This species is apparently not closely related to L. ibizanus (von Schulthess, 1934), since the latter species has distinctly longer clypeus, about 1.1 × as wide as long (Gusenleitner 1993: 769, fig. 12) and is distributed in Portugal and Spain only. The most closely related species to L. nacrocephalus is probably L. signatus, as was stated above. It is noteworthy that a drawing of the clypeus of L. signatus in the original publication (Gusenleitner 1995: 180, fig. 1) shows much narrower apical emargination than can be found in photographs of the holotype published on the Internet (https: // www. zobodat. at / belege. php? id = 100415475). Leptochilus nacrocephalus has the clypeus similar to that in the drawing of L. signatus but definitely different from that in the photographs. More material is required to ascertain whether L. signatus is conspecific with L. nacrocephalus or represents a distinct species. The specimen from Armenia has Kostylev’s identification label but he did not include it in the original description (Kostylev 1940).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923BFFEFFF2DFF52966AFF29.taxon	description	(Fig. 6 A – C, F)	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923BFFEFFF2DFF52966AFF29.taxon	diagnosis	Diagnosis. The species belongs to a group of the subgenus Lionotulus with pronotal carina not lamellate, metanotum sharply edged posteriorly, hind trochanter rounded posteriorly, and apical lamella of T 2 not sclerotized, with small and rounded basal punctures. Leptochilus puzanovi is apparently related to L. tarsatus (de Saussure, 1855) and differs from it, in the female sex, by a broader head (1.15 × as wide as long vs. 1.05 × as wide as long in L. tarsatus, Fig. 6 G; the distance between lateral ocellus and occipital margin is equal to that between lateral ocellus and eye in L. puzanovi vs. exceeding the distance between lateral ocellus and eye in L. tarsatus), deeper emarginate apical margin of the clypeus (0.5 × as deep as wide vs. 0.4 × as deep as wide in L. tarsatus, Fig. 6 G), a broader mesosoma (0.9 × as broad as long vs. 0.75 × as broad as long in L. tarsatus, Fig. 6 E), and a dark brown apical lamella of the tergum 2 (vs. light-colored in L. tarsatus, Fig. 6 D).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923BFFEFFF2DFF52966AFF29.taxon	description	Description. Female. Body length (from head to apical margin of T 2) 6.5 mm; forewing length 5.5 mm. Head about 1.15 × as wide as long in frontal view. Mandible with four teeth. Labial palpus not modified. Clypeus about 1.3 × as wide as long, its apical emargination about 0.5 × as deep as wide, taking about 1 / 5 of clypeal width, apical teeth acute, not carinate. Distance between lateral ocellus and occipital margin equal to distance between lateral ocellus and eye. Occipital carina not forming angle at lower part of gena. Anterior pronotal carina strongly developed, not lamellate, shoulders rounded. Tegula with outer margin rounded posteriorly, shorter than scutellum. Scutellum rather convex. Metanotum slightly raised above scutellum, sharply edged posteriorly. Hind trochanter rounded posteriorly. Propodeum with indistinct dorsal surface only; propodeal concavity with rounded lateral margins; median carina developed at lower half of propodeal concavity. Projection of submarginal carina of propodeum longer than wide, bluntly rounded apically; valvula rounded. Apical lamella of T 2 nontransparent, with basal row of small rounded punctures, interstices not sclerotized. S 2 in lateral view roundly elevated at base, in ventral view with distinct longitudinal furrow. Clypeus finely punctate, interstices shining, reaching several puncture diameters at center; punctation becomes denser laterally and basally. Punctures on frons and vertex strongly larger and denser than those on clypeus, interstices shorter than one puncture diameter, with additional micropunctures; gena with somewhat finer punctures than those on frons and vertex. Dorsal surface of pronotum punctate similarly to vertex but sparser, interstices reaching one puncture diameter. Punctures become slightly larger on scutum and scutellum, interstices shorter than one puncture diameter, with micropunctures. Tegula shining, with microsculpture only. Dorsal mesepisternum and mesepimeron punctate much denser than pronotum, interstices dull, shorter than one puncture diameter. Ventral mesepisternum punctate similarly to pronotum. Epicnemium shagreened, without punctures. Metanotum with coarse punctures on upper part of posterior side and shining impunctate lower part. Metapleuron longitudinally rugose. Dorsolateral surface of propodeum dull, with irregular dense shallow punctures and microsculpture. Lateral surface of propodeum longitudinally rugose but with hardly visible sparse punctures; sculpture of propodeal concavity similar to that on lateral surface. T 1 with shallow punctures, interstices reaching one puncture diameter on dorsal surface, dull, with very dense microsculpture. S 1 reticulately punctured. T 2 with smoothened punctures, finer than those on T 1, and with similar microsculpture. S 2 punctate similarly to T 2 but punctures more distinct. Following terga and sterna without distinct punctures, with dull microsculpture only. Posterior side of mandible and labial palpus with straight pale setae about as long as diameter of F 1 at distal end. Frons with straight pale setae about as long as diameter of F 1 at base. Clypeus, scapus, gena, vertex, and dorsal side of mesosoma with setae shorter than diameter of F 1 at base. Ventral surface of mesosoma and whole metasoma with short appressed setae only. Basal color black. Small lateral spots on pronotum, outer margin of tegula, and apical bands of T 1 and T 2 ivory. Central spot on tegula brownish. Distal ends of femora and entire tibiae reddish-brown, tarsi dark brown. Wings strongly fuscous, particularly on marginal cell; veins dark brown. Male. Unknown.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923BFFEFFF2DFF52966AFF29.taxon	materials_examined	Material examined. HOLOTYPE: ♀, labeled “ Dagestan / vicinity of Gubden / 42 ° 34 ′ 23 ″ N 47 ° 33 ′ 01 ″ E / 2. VI. 2022 leg. D. Puzanov // Holotypus ♀ / Leptochilus puzanovi / Fateryga [red label] ” [ZISP]. PARATYPE: same locality as holotype, 3. VI. 2022, 1 ♀, leg. A. Fateryga [CAFK].	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923BFFEFFF2DFF52966AFF29.taxon	etymology	Etymology. It is a pleasure to name this species honoring my friend Dmitry V. Puzanov, the collector of the holotype.	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
00270D7C923BFFEFFF2DFF52966AFF29.taxon	distribution	Distribution. Russia: Dagestan Republic (known from the type locality only).	en	Fateryga, Alexander V. (2024): On some new and little-known Palaearctic species of the genus Leptochilus de Saussure, 1853 (Hymenoptera: Vespidae: Eumeninae). Zootaxa 5432 (1): 38-53, DOI: 10.11646/zootaxa.5432.1.3, URL: http://dx.doi.org/10.11646/zootaxa.5432.1.3
