taxonID	type	description	language	source
03A2879AFFF1FFB653DADB21FAAF398D.taxon	description	urn: lsid: zoobank. org: act: AC 77 A 4 BF-FC 3 A- 481 F-BD 18 - 8175 DC 3 CEE 5 B Figs 1 – 7	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF1FFB653DADB21FAAF398D.taxon	type_taxon	Type species Sulcomesitius quatei Móczár, 1977.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF1FFB653DADB21FAAF398D.taxon	etymology	Etymology The name Astromesitius is composed from the Greek (and Latin) ‘ aster ’, which means ‘ star’, and Mesitius, the type genus of Mesitiinae. The name refers to the star-shaped hypopygium of the new genus.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF1FFB653DADB21FAAF398D.taxon	description	Description Male Body sparsely foveolate (Fig. 1 E). Head longer than wide, malar space convergent anteriorly and as long as VOL. Clypeus with median lobe quadrate. Antenna with distinct sparse setae, pedicel caliciform, flagellomeres longer than wide and caliciform. Eye setose, circular and small, HE usually about one third of LH. Ocelli small. Dorsal pronotal area with longitudinal sulcus hardly distinct or absent. Anteromesoscutum without longitudinal sulcus. Metapectal-propodeal complex with posterior projection hardly distinct or absent. Macropterous. Hypopygium with posterior margin with short and acute branches, with lateral corner projecting and well defined, general shape resembling a star. Genitalia with ventral arm of paramere longer and wider than dorsal arm, aedeagus slender, fusiform. Female Not available for description.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF1FFB653DADB21FAAF398D.taxon	discussion	Remarks The main characteristic to recognize Astromesitius gen. nov. is the hypopygium shape. The star-shaped hypopygium is a unique shape within Mesitiinae. Additionally, the sparsely foveolate integument surface, the sparse pubescence of the antenna, which is of medium length to long, and the hardly distinct or absent longitudinal pronotal sulcus are also important in recognizing the genus. These characteristics are further discussed in the Discussion.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF1FFB653DADB21FAAF398D.taxon	distribution	Distribution Afrotropical: United Arab Emirates and South Africa. Oriental: Thailand and Vietnam. Palaearctic: Czech Republic, Hungary, Italy, Romania, Russia and Slovakia.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF1FFB653DADB21FAAF398D.taxon	synonymic_list	Included species Astromesitius carbonarius (Móczár, 1970) gen. et comb. nov. from Metrionotus Astromesitius indistintus (Barbosa & Azevedo, 2011) gen. et comb. nov. from Metrionotus Astromesitius minutissimus (Móczár, 1971) gen. et comb. nov. from Metrionotus Astromesitius mutilloides (Costa, 1864) gen. et comb. nov. from Clytrovorus Astromesitius olavoi gen. et sp. nov. Astromesitius quatei (Móczár, 1977) gen. et comb. nov. from Sulcomesitius Astromesitius thionyi gen. et sp. nov.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	description	urn: lsid: zoobank. org: act: 0 A 21 A 488 - 42 E 3 - 4 F 07 - B 0 F 7 - A 4157 ED 1 BC 5 B Figs 1 A, 2 A, 3 A, 4 A, 5 A	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	diagnosis	Diagnosis Head longer than wide. Malar space shorter than VOL. First flagellomere as long as pedicel. Frontal angle of ocellar triangle a right angle. Mesosoma with dorsal pronotal area with anterior corner rounded, with side straight, posterior margin concave; longitudinal pronotal sulcus incomplete. Metapectalpropodeal complex as long as metapectal-propodeal complex half-width, with longitudinal ridge between metapostnotal median and metapostnotal-propodeal carinae; posterior projection of metapectalpropodeal complex present, short, thick, divergent. Lateral surface of metapectal-propodeal complex areolate, with upper carina and posterior carina. Mesopleuron lower half foveolate. Hypopygium as long as wide; anterior stalk wide and long; lateral projection long; posterior margin with branches wide. Genitalia with paramere apex sparse setose; ventral arm of paramere club-shaped, wide at apex; dorsal arm shorter than ventral arm, club-shaped, and with basal margin thin. Aedeagus aligned with paramere apex, apical margin truncate.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	etymology	Etymology The species is named in honour of Olavo Perim Galvão, a friend, an environmental auditor of the Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA) and a warrior for environmental causes, who died while fighting against deforestation in the Amazon, the place which he dearly loved.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	materials_examined	Material examined Holotype THAILAND • ♂; Chaiyaphum, Pa Hin Ngam N [ational] P [ark]; 15 ° 39.9 ′ N, 101 ° 27.2 ′ E; alt. 357 m; 26 Dec. 2006 – 2 Jan. 2007; Katae Sa-nog & Buakaw Adnafai leg.; deciduous; Malaise trap; QBG. Paratype THAILAND • 1 ♂; Ubon Ratchathani, Pha Taem N [ational] P [ark], Don Huay Can; 15 ° 40.016 ′ N, 105 ° 30.502 ′ E; alt. 246 m; 9 – 15 Jun. 2007; Tongcam & Banlu leg.; Malaise trap; UFES.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	description	Description BODY (Fig. 5 A). 2.4 – 2.5 mm long; antenna 1.5 – 1.55 mm long; forewing 1.5 mm long. COLOUR. Head and mesosoma black; clypeus and antenna dark castaneous almost black; mandible, palpi and legs dark castaneous, lighter distad; metasoma dark castaneous almost black; wings hyaline with venation light castaneous. HEAD (Fig. 4 A). Head longer than wide. Malar space shorter than VOL, parallel. Mandible with three sharp distal teeth. Median clypeal lobe quadrate, apical margin slightly outcurved, median clypeal carina complete, arched in lateral profile. Lateral clypeal lobe short. Antenna very long, reaching the middle of metasoma; scape slightly curved; pedicel caliciform; first flagellomere as long as pedicel; flagellomeres each almost twice as long as wide, proximal ones wider subdistally; flagellomeral pubescence erectsuberect, about 0.5 × as long as flagellomeral diameter. HE about 0.35 × LH. Frons strongly foveolate. Frontal angle of ocellar triangle a right angle. Occipital carina with surface foveolate. MESOSOMA (Fig. 1 A). Dorsal pronotal area foveolate, shorter than wide, trapezoidal, anterior margin outcurved, anterior corner rounded, lateral margin concave, posterior margin concave; longitudinal pronotal sulcus incomplete, weakly impressed. Anteromesoscutum coriaceous, longer than mesoscutellum; longitudinal anteromesoscutal sulcus absent; notaulus deep, wide, polished, almost entirely straight, converging posterad; parapsidal signum shallow, narrow, straight, parallel. Mesoscutummesoscutellar sulcus straight medially, deep, and laterally dilated; mesoscutellum coriaceous. Metapectalpropodeal disc 0.5 × as long as wide, with incomplete longitudinal ridge between metapostnotal median and metapostnotal-propodeal carinae; metapostnotal surface striate; metapostnotal median carina complete; posterior projection short, thick, discretely divergent posterad. Propodeal declivity areolate, with median and lateral carinae. Lateral surface of metapectal-propodeal complex areolate, subdorsal carina ill-defined, vertical carina complete. Mesopleuron foveolate, but progressively weakening posterad; posterior oblique sulcus foveolate; mesopleural suture with inner margin striate. WINGS. Fore wing with Rs & M vein arched; pterostigma short, about as long as prestigmal abscissa of R 1, distal margin convex. Hindwing with three distal hamuli, first hamulus widely separated from others. METASOMA. Mostly polished, tergum I mostly glabrous, subsequent terga progressively more setose laterally and posteriorly. Hypopygium as long as wide; anterior stalk wide and long; lateral projection long; posterior margin with branches short and wide (Fig. 2 A). GENITALIA (Fig. 3 A). Paramere apex sparsely setose; ventral arm of paramere club-shaped, wide at apex; dorsal arm shorter than ventral arm, club-shaped, and with basal margin thin. Cuspis ventral arm not reaching dorsal arm apex, wide; dorsal arm wide. Aedeagus slender, with apex aligned with paramere apex, apical margin truncate, lateral margin of basal portion convex. Apodeme parallel, base curved laterad.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	discussion	Remarks This species is similar to Astromesitius carbonarius (Móczár, 1970) and A. minutissimus (Móczár, 1971), mainly in having the small and black body; the head longer than wide; the hyaline forewing. Astromesitius olavoi gen. et sp. nov. can be distinguished from these two species by having the frons, the dorsal pronotal area and the mesopleuron sparsely foveolate; the dorsal pronotal area with longitudinal sulcus, but inconspicuous; the metapectal-propodeal disc with posterior projection inconspicuous; the genitalia with truncate and projected apex of aedeagus. Thus we did not doubt the validity of a new species.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFF3FFBF5310D800FEF538C2.taxon	distribution	Distribution Thailand.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	description	urn: lsid: zoobank. org: act: 411 E 3776 - 71 AD- 4 EFF- 847 E- 334 DFF 06 D 0 AC Figs 1 B, 2 B, 3 B, 4 B, 5 B	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	diagnosis	Diagnosis Head as long as wide. Malar space shorter than VOL, parallel. First flagellomere as long as pedicel. Frontal angle of ocellar triangle acute. Mesosoma dorsal pronotal area with anterior margin convex, anterior corner rounded and side slightly concave; longitudinal pronotal sulcus incomplete. Metapectalpropodeal complex as long as metapectal-propodeal complex half-width, without longitudinal ridge between metapostnotal median and metapostnotal-propodeal carinae; metapostnotal surface polished; posterior projection of metapectal-propodeal complex absent. Propodeal declivity coriaceous. Lateral surface of metapectal-propodeal complex coriaceous, with upper carina and posterior carina. Mesopleuron coriaceous; mesopleural suture absent. Hypopygium as long as wide; anterior stalk wide and long; lateral projection short; posterior margin with branches slender. Genitalia with paramere apex glabrous; ventral arm of paramere sinuous, slender; dorsal arm as long as ventral arm, club-shaped. Aedeagal apex aligned with paramere apex, apical margin rounded.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	etymology	Etymology The species is named in honour of Thiony Emanuel Simon, a friend, post-doctoral fellow of the Graduate School of Zoology at UFES and marine researcher, who died while diving in a field expedition.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	materials_examined	Material examined Holotype UNITED ARAB EMIRATES • ♂; Al-Ajban; 24.36 ° N, 55.01 ° E; 27 May – 26 Jun. 2006; A. van Harten leg.; Malaise trap; UFES 118956. Paratypes UNITED ARAB EMIRATES • 1 ♂; 7 km S of al-Jazirat al-Hamra; 25.40 ° N, 55.45 ° E; 8 Mar. 2005; A. van Harten leg.; hand collecting; UFES • 1 ♂; Hatta x Huwaylat; 24.50 ° N, 56.09 ° E; 12 Mar. 2005; A. van Harten leg.; hand collecting; UFES.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	description	Description BODY (Fig. 5 B). 1.3 – 1.8 mm long; antenna 0.9 – 1.1 mm long; forewing 0.8 – 1.0 mm long. COLOUR. Head, clypeus, antenna, mandible, palpi, mesosoma, legs and metasoma dark castaneous, except tarsi castaneous. Wings hyaline, venation light castaneous. HEAD (Fig. 4 B). Head as long as wide. Malar space shorter than VOL, parallel. Mandible with three sharp distal teeth. Median clypeal lobe quadrate, apical margin slightly outcurved, median clypeal carina complete, arched in lateral profile. Lateral clypeal lobe short. Antenna very long, reaching middle of metasoma; scape slightly curved; pedicel caliciform; first flagellomere as long as pedicel; flagellomeres each almost twice as long as wide; proximal ones wider subdistally; flagellomeral pubescence suberect, about 0.5 × as long as flagellomeral diameter. HE about 0.42 × LH. Frons coriaceous. Frontal angle of ocellar triangle acute. Occipital carina with surface foveolate; absent ventrally. MESOSOMA (Fig. 1 B). Dorsal pronotal area coriaceous, shorter than wide, trapezoidal, anterior margin outcurved, anterior corner rounded, lateral margin concave, posterior margin concave; longitudinal pronotal sulcus very incomplete, restricted to anterior fifth, weakly impressed. Anteromesoscutum coriaceous, as long as mesoscutellum; longitudinal anteromesoscutal sulcus absent; notaulus deep, wide, polished, slightly incurved straight, converging posterad; parapsidal signum shallow, narrow, straight, parallel. Mesoscutum-mesoscutellar sulcus straight medially, deep, and laterally dilated; mesoscutellum coriaceous. Metapectal-propodeal disc 0.5 × as long as wide, without longitudinal ridge between metapostnotal median and metapostnotal-propodeal carinae; metapostnotal surface striate; metapostnotal median carina complete, but weak and ill-defined posteriorly; posterior projection absent. Propodeal declivity very weakly areolate with polished background, median and lateral carinae very inconspicuous. Lateral surface of metapectal-propodeal complex very weakly areolate with polished background, subdorsal and vertical carina absent. Mesopleuron weakly coriaceous; posterior oblique sulcus weak, foveolate; mesopleural suture narrow. WINGS. Forewing with Rs & M vein arched; pterostigma short, about as long as prestigmal abscissa of R 1, distal margin convex. Hindwing with three distal hamuli, first hamulus widely separated from others. METASOMA. Mostly polished, tergum I mostly glabrous, subsequent terga progressively more setose laterally and posteriorly. Hypopygium as long as wide; anterior stalk wide and long; lateral projection short; posterior margin with branches short and slender (Fig. 2 B). GENITALIA (FIG. 3 B). Paramere apex glabrous; ventral arm of paramere sinuous, slender; dorsal arm as long as ventral arm, club-shaped. Cuspis ventral arm aligned with dorsal arm apex, slender; dorsal arm wide. Aedeagus slender, with apex aligned with paramere apex, apical margin rounded, lateral margin of basal portion slightly convex. Apodeme parallel, base straight.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	discussion	Remarks The species Astromesitius thionyi gen. et sp. nov. is slightly similar to A. indistintus, with which it shares the absence of a longitudinal ridge between the metapostnotal median carina and metapostnotalpropodeal suture. The new species is distinguished from all the other species of Astromesitius gen. nov. by the coriaceous body surface; the polished metapostnotal-propodeal complex surface; the metapostnotal median carina incomplete; the coriaceous propodeal declivity and lateral surface of the metapostnotalpropodeal complex; the genitalia with sinuous paramere ventral arm. Astromesitius thionyi gen. et sp. nov. is the smallest species of the genus and the characteristics cited above are exclusive to this species among Astromesitius gen. nov. species; thus we did not doubt the validity of a new species.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFAFFBE536ADEFFFE1D3D8B.taxon	distribution	Distribution United Arab Emirates.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFB950F9DD3FFE163E8E.taxon	description	Figs 1 C, 3 C, 4 C, 6 A	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFB950F9DD3FFE163E8E.taxon	diagnosis	Diagnosis Body 2.1 mm long. LFW 1.5 mm. Wings infuscate; head and mesosoma dark castaneous nearly black; metasoma dark castaneous. Head as long as wide. Malar space shorter than VOL, convergent anteriorly. Frons coriaceous. Ocelli small. Mesosoma with pronotal disc shorter than wide, coriaceous, with side straight, posterior margin sinuous; longitudinal pronotal sulcus absent. Metapectal-propodeal complex as long as metapectal-propodeal complex half-width, without longitudinal ridge between metaposnotal median carina and metaposnotal-propodeal suture; metaposnotal surface areolate; posterior spine of metapectal-propodeal complex absent. Propodeal declivity areolate. Lateral surface of metapectalpropodeal complex areolate. Metasoma with hypopygium as long as wide; lateral projection short; posterior margin with branches short and slender. Genitalia with paramere apex sparsely hairy; aedeagus slender, with apex not reaching paramere apex, apical margin angled, lateral margin of basal portion convex.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFB950F9DD3FFE163E8E.taxon	materials_examined	Material examined UNITED ARAB EMIRATES • 1 ♂; Al-Ajban; 24.36 ° N, 55.01 ° E; 1 Apr. – 2 May 2006; Malaise trap; A. van Harten leg.; UFES 56168.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFB950F9DD3FFE163E8E.taxon	discussion	Remarks This species was originally described in Metrionotus (Móczár 1970 a) from South Africa (Móczár 1970 a), and was later recorded from the United Arab Emirates (Barbosa & Azevedo 2011). We examined one male from UAE deposited at UFES, and the analyses reveal that their characteristics correspond to Astromesitius gen. nov. Thus, we propose a new combination for this species from Metrionotus to Astromesitius gen. nov.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFBB5039D92CFE163B83.taxon	description	Figs 1 D, 2 C, 3 D, 4 D, 6 B	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFBB5039D92CFE163B83.taxon	diagnosis	Diagnosis Body 2.2 mm long. LFW 1.2 mm. Wings clear hyaline; head and mesosoma orange; metasoma dark castaneous. Head longer than wide. Malar space shorter than VOL, convergent anteriorly. Frons weakly foveolate. Ocelli small. Mesosoma with pronotal disc shorter than wide, weakly foveolate, with side straight, posterior margin concave; longitudinal pronotal sulcus absent. Antero-mesoscutum coriaceous. Metapectal-propodeal complex as long as metapectal-propodeal complex half-width, with longitudinal ridge between metaposnotal median carina and metaposnotal-propodeal suture; metaposnotal surface areolate; posterior spine of metapectal-propodeal complex present, short, thick, divergent. Propodeal declivity areolate. Lateral surface of metapectal-propodeal complex areolate. Metasoma with hypopygium longer than wide, anterior stalk wide and short; posterior margin with branches short and wide. Genitalia with paramere apex dense hairy; aedeagus slender, with apex aligned with paramere apex, apical margin rounded, lateral margin of basal portion slightly convex.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFBB5039D92CFE163B83.taxon	materials_examined	Material examined Paratype YEMEN • 1 ♂; Lahj; Aug. 2000; Malaise trap; A. van Harten & A. Sallam leg.; UFES.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFCFFBB5039D92CFE163B83.taxon	discussion	Remarks This species was originally described in Metrionotus (Móczár 1970 a) from the United Arab Emirates (Barbosa & Azevedo 2011). We examined one male type, the paratype, from material deposited at UFES, and the analyses reveal that its characteristics perfectly fit Astromesitius gen. nov., including the star-shaped hypopygium. Thus, we propose a new combination for this species from Metrionotus to Astromesitius gen. nov.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFEFFBB50F2DE3FFD1C3F9B.taxon	description	Figs 1 E, 2 D, 3 E, 4 E, 7 A	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFEFFBB50F2DE3FFD1C3F9B.taxon	diagnosis	Diagnosis Body 2.7 mm long. LFW 1.5 mm. Wings infuscate; head and pronotum light castaneous; metasoma castaneous; mesosoma dark castaneous. Head as long as wide. Malar space as long as VOL, convergent anteriorly. Frons coriaceous. Ocelli large. Mesosoma with pronotal disc shorter than wide, weakly foveolate, with side straight, posterior margin concave; longitudinal pronotal sulcus hardly distinct, incomplete. Metapectal-propodeal complex as long as metapectal-propodeal complex half-width, without longitudinal ridge between metaposnotal median carina and metaposnotal-propodeal suture; metaposnotal surface areolate; posterior spine of metapectal-propodeal complex absent. Propodeal declivity striate. Lateral surface of metapectal-propodeal complex areolate. Metasoma with hypopygium longer than wide; anterior stalk wide and short; posterior margin with branches short and wide. Genitalia with paramere apex sparsely hairy; aedeagus slender, with apex surpassing paramere apex, apical margin rounded, lateral margin of basal portion slightly convex.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFEFFBB50F2DE3FFD1C3F9B.taxon	materials_examined	Material examined Holotype UNITED ARAB EMIRATES • ♂; Wadi Bih dam; 25.48 ° N, 56.04 ° E; 9 – 23 Jul. 2008; light trap; van Harten leg.; UFES 56528.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFEFFBB50F2DE3FFD1C3F9B.taxon	discussion	Remarks This species was originally described in Heterocoelia (Móczár 1971) from South Africa (Móczár 1971), and later recorded from the United Arab Emirates (Barbosa & Azevedo 2011). It was transferred to Metrionotus by Móczár (1974). We examined the holotype male from UAE identified by Barbosa & Azevedo (2011) and deposited at UFES, and the analyses, mainly of the hypopygium, reveal that their characteristics perfectly fit Astromesitius gen. nov. Thus, we propose a new combination for this species from Metrionotus to Astromesitius gen. nov.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFEFFA550EADA17FCB23E44.taxon	diagnosis	Diagnosis Female Head as long as wide. Malar space shorter than VOL, convergent anteriorly. Eye very small. Frons foveolate. Ocelli very small. Mesosoma with pronotal disc as long as wide, weakly foveolate, with side straight, posterior margin concave; longitudinal pronotal sulcus hardly distinct, incomplete. Metapectalpropodeal complex shorter than metapectal-propodeal complex half-width, without longitudinal ridge between metaposnotal median carina and metaposnotal-propodeal suture; metaposnotal surface areolate; posterior spine of metapectal-propodeal complex present, short, thin and divergent. Propodeal declivity striate. Wings micropterous. Male Hypopygium longer than wide; anterior stalk slender and long; posterior margin with branches short and wide. Genitalia with paramere apex sparsely hairy; ventral arm of paramere sinuous and slender; aedeagus slender, with apex aligned with paramere apex, apical margin rounded, and with short outer projection, lateral margin of basal portion slightly convex.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFFEFFA550EADA17FCB23E44.taxon	discussion	Remarks This species was originally described in Sclerodermus (Costa 1864) based on one female from Italy. It was transferred to Mesitius by Kieffer (1914), who synonymised Sclerodermus mutilloides under Mesitius ghilianii Spinola, 1851. Argaman (2003) revalidated the status as a valid species and transferred this species from Mesitius to Clytrovorus. Argaman also established the synonymy of Mesitius fuscicornis Kieffer, 1906, M. zavadili Hoffer, 1936 and M. viator Nagy, 1968 under this species. We did not have access either to the type, which is lost, or to any other voucher specimens of this species, and the original descriptions are not sufficiently detailed to compare with the diagnostic characteristics of Astromesitius gen. nov. However, the illustration by Argaman (2003) is clear and sufficient to analyze and reallocate this species from Clytrovorus to Astromesitius gen. nov., because it has long and sparse antennal pubescence and the hypopygium is ‘ star-shaped’.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFE0FFA55085D879FC553D8B.taxon	description	Figs 1 F, 2 E, 3 F, 4 F, 7 B	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFE0FFA55085D879FC553D8B.taxon	diagnosis	Diagnosis Body 4.3 mm long. LFW 2.5 mm. Wings bi-banded; head and mesosoma dark castaneous nearly black; metasoma dark castaneous. Head longer than wide. Malar space shorter than VOL, convergent anteriorly. Eye very small. Frons foveolate. Ocelli large. Mesosoma with pronotal disc as long as wide, foveolate, with side slightly concave, posterior margin concave; longitudinal pronotal sulcus hardly distinct, incomplete. Metapectal-propodeal complex shorter than metapectal-propodeal complex halfwidth, with longitudinal ridge between metaposnotal median carina and metaposnotal-propodeal suture; metaposnotal surface areolate; posterior spine of metapectal-propodeal complex present, short, thick, parallel. Propodeal declivity areolate. Lateral surface of metapectal-propodeal complex areolate. Metasoma with hypopygium longer than wide; anterior stalk slender and short; posterior margin with branches short and wide. Genitalia with paramere apex glabrous; aedeagus slender, with apex aligned with paramere apex, apical margin rounded, lateral margin of basal portion slightly convex.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFE0FFA55085D879FC553D8B.taxon	materials_examined	Material examined Holotype VIETNAM • ♂; Djiring; alt. 1200 m; 22 – 28 Apr. [19] 60; Grasse, L. W. Quate leg.; BPBM.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
03A2879AFFE0FFA55085D879FC553D8B.taxon	discussion	Remarks This species was originally described in Sulcomesitius and recorded from Vietnam (Móczár 1977). We examined the holotype male deposited at BPBM, and the analyses reveal that it fits the concept of Astromesitius gen. nov., mainly because of the hypopygium shape. Thus, we propose a new combination for this species from Sulcomesitius to Astromesitius gen. nov.	en	Barbosa, Diego N., Azevedo, Celso O. (2019): Astromesitius, a new genus of Mesitiinae (Hymenoptera, Bethylidae) from the Old World. European Journal of Taxonomy 587: 1-20, DOI: 10.5852/ejt.2019.587
