identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
039C8798F365084308D2FE64FD2E1382.text	039C8798F365084308D2FE64FD2E1382.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Desoria nordenskioldi Babenko & Fjellberg 2025	<div><p>Desoria nordenskioldi sp. nov.</p><p>Figs 1–16</p><p>Type material. Holotype, female, western Chukotka, Pevek, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=170.6142&amp;materialsCitation.latitude=69.8111" title="Search Plazi for locations around (long 170.6142/lat 69.8111)">Apapelgino</a>, 69.8111°N, 170.6142°E, upper part of hill slope, Dryas association, 24.07.2018, O. Makarova &amp; K. Makarov leg. Paratypes, 20 specimens (slides, sex not checked) from the same biotope; 16 specimens (including several juveniles), same area, date and collectors, but zonal plant association with Vaccinium uliginosum .</p><p>Additional material. 2 specimens, western Yakutia (Sakha) Republic, Olenek Bay, Baganytta-Kyuel Lake, 73.50°N, 118.167°E, spotted tundra, moss trough, 06– 08.07.1994; 4 specimens, same Republic, delta of Yana River, Shirokostan Peninsula, 72.42°N, 141.00°E, spotted tundra on rocky soil, 04– 06.07.1994; 2 specimen, same region and date, but dry moss/lichen rocky slope and peat rim in bog; 3 specimens, Novosibirsk Islands, Faddeev Is., 75.58°N, 144.83°E, zonal spotted tundra, 10– 11.07.1994; 6 specimens (slides) and 11 specimens (alcohol), same archipelago, Kotelnyi Is., Balyktakh River, 75.05°N, 140.17°E, elevated rim in polygonal swamp (96/94), 31.07– 02.08.1994; 6 specimens, Indigirka River delta, 71.43°N, 149.75°E, lemming colony, grasses, 14– 16.07.1994; 5 specimens, Kolyma River delta (left bank), Pokhodskaya Edoma, 69.53°N, 160.73°E, Vaccinium vitis-idaea association on slope, 18– 19.07.1994, all A. Babenko leg.; 8 specimens, Yakutia (Sakha) Republic, Suntar-Khayata Mt. Range, upper reaches of Kyubyume River, vicinity of «Vostochnaya» Meteorological station, 63.2408°N, 139.6313°E, larch forest with Sphagnum, ~ 1400 m alt., 24.07.2002, O. Makarova leg.; 2 specimens, same area and collector, but litter under dwarf pine, 1470 m. alt., 07.07.2002; 3 specimens, same region, vicinity of Tiksi, 71.6182°N, 128.9189°E, dwarf Betula shrubs, 22.08.2015, A. Nekhaeva leg.; 4 specimens (slides), Magadan Region, upper current of Kolyma River, Aborigen field station, 61 o 56'N, 149 o 40'E, moss and Larix / Pinus litter on slope down to stream (AF-79), 25.07.1979, A. Fjellberg leg.; 26 specimens (alcohol), same area and collector, but deep, moist litter in dense thickets of Pinus pumila at field station, ~ 1200 m, 27.07.1979 (AF-97).</p><p>Diagnosis. Species of the tigrina -group sensu Fjellberg (2007) of the genus Desoria, characterized by fused Abd. V–VI, long smooth macrochaetae and a low number of tergal macrosensilla.</p><p>Description. Body size up to 1.6 mm. Colour usually uniformly dark with few irregular lighter spots, but lighter specimens also exist. Blue-violet pigment evenly distributed throughout the body, antennae also intensely coloured, dens and distal parts of legs more or less whitish. Body shape typical of the genus, Abd. V–VI completely fused (Fig. 1). Integument smooth, without visible granulation. Dorsal setal cover dense and strongly differentiated (Figs 2–3), especially on last abdominal segments (Fig. 4). Macrosetae smooth, pointed and usually slightly thickened at base, those on medial part of Abd. V about three times as long as inner edge of hind unguis. The number of dorsal macrosensilla strongly reduced: only 33/21113 s in the p-row on abdomen and 10/001 spine-like microsensilla present (Fig. 1).</p><p>Antennae slightly longer than head. Subapical pin seta on Ant. IV with a short basal process, subapical organite small rod-shaped (Fig. 5). AO on Ant. III normal, with 4 dorsal and 2 lateral sensilla (Fig. 6), Ant. I with few thickened sensilla on ventral side and usually with 2–3 short basal microsensilla (Fig. 7). Ant. II without clearly differentiated sensilla. Each side of a head with 6 large ocelli in a rather peculiar arrangement, ocelli A and D being located unusually far apart (Fig. 8), ocelli G and H invisible. PAO elongate, about 1.8–2.0 as long as diameter of nearest ocellus. Labrum with 4/554 setae, apical edge with 4 indistinct low ridges and simple apical ciliation, central part of clypeal field with 5–7 setae (Fig. 9). Maxillary outer lobe with a simple palp and 4 sublobal setae. Labial palp with all usual apical papillae (A–E) present, 4 proximal setae and 16 guards including e7 at base of papilla E; terminal seta on papillae subequal to guards, lateral process on papilla E finger-like; hypostomal papilla with H also subequal to h1/h2. Basomedial and basolateral fields of labium with 4 and 5 setae, respectively. Head with (4)5+5 postlabial setae along ventral line. Mandibles normal, with moderately strong teeth. Maxillae with a tridentate capitulum and 6 lamellae covered with fine denticles only, lamellae short, not projecting beyond tip of capitulum (Fig. 10).</p><p>No ventral setae on thorax. Ventral tube with (2)3+3 frontal setae, usually with 4+4 lateral and 3–5 caudal setae with two longer ones in apical row (Fig. 11). Retinaculum with 4+4 teeth and 2–5 setae. Manubrium with a variable number of ventral setae and usually 2+2 short apical ones; ventroapical thickening with blunt teeth (Fig. 12). Dens with numerous ventral (anterior) setae and few dorsal (posterior) ones in the proximal third (up to 11–12, Fig. 13), ventroapical seta not prolonged (Fig. 14). Mucro with four teeth, apical and subapical ones almost subequal, a lateral seta absent (Figs 14–15). Tibiotarsi with 11 acuminate apical setae, Tib. 1–2 with 4(5)+4(5) setae along median line, basal part of foreleg usually with two outer setae, a third one rarely observed in the largest specimens. Unguis with a clear inner tooth and a pair of lateral ones in basal half; unguiculus about half as long as inner edge of unguis and also usually with a corner tooth.</p><p>Etymology. The new species is named in honor of Prof. Nils Adolf Eric Nordenskiöld and his voyage on the Vega along the northern coast of Eurasia (1878–1879). This name is given in our collection after the Russian- Swedish expedition «Tundra Ecology 94», dedicated to the 100th anniversary of this voyage. But even before that, it was known from the New Siberian Islands (V. Bulavintsev’s collection, 1985) and from the Magadan Region (1979, A. Fjellberg), but remained undescribed until now.</p><p>Affinities. Among the Palaearctic representatives of the tigrina group sensu Fjellberg (2007) [= fennica group sensu Potapov 2001) the new species is comparable only to D. intermedia (Schött, 1902) sensu Fjellberg (2007) due to the fused last abdominal segments and long macrosetae. The latter species differs significantly in the number of dorsal macrosensilla: 76/55656, vs 33/ 21113 in D. nordenskioldi sp. nov.</p><p>This last character makes the new species distinguished from all representatives of the genus for which it is known. Among the Palaearctic species, a low number of dorsal macrosensilla (i.e. 32/22235 s) is shared only by D. blekeni (Leinaas, 1980) as well as a recently described species from the closely related genus Vertagopus, V. glacialis Valle, 2025 (33/21124 s). A pair of cryophilic species of the family with a similarly low number of dorsal macrosensilla are also known from North America (Fjellberg 2010), namely Myopia alaskana (Christiansen &amp; Bellinger, 1980) (22/11125 s) and D. olympica Fjellberg, 2010 (22/11135 s). None of these species are closely related and the reduction in the number of macrosensilla in them seems to have occurred independently.</p><p>Many forms have been described from various regions of the eastern Palearctic for which the sensory equipment of the terga is unknown. In particular, D. Japonica (Yosii, 1939), D. yukinomii (Yosii, 1939), D. spatiosa (Uchida &amp; Tamura, 1968), D. husaini Yosii &amp; Ashraf, 1965, D. mazda (Yosii, 1971), and D. kosiana (Bagnall, 1949) can be mentioned. The status of most of these species needs clarification (Potapov 2001) and even their formal comparisons with the new species are very problematic, although we have failed to find any particular similarities between their existed descriptions and the new species.</p><p>Unfortunately, there are even more species in North America with unknown sensory chaetotaxy. Using the most comprehensive key to North American species (Christiansen &amp; Bellinger 1998), D. nordenskioldi sp. nov. could be identified as D. nigrifrons (Folsom, 1937) on the basis of other characters. The latter species belongs to a different group, characterized by a bifurcate maxillary palp (see Fjellberg 1984).</p><p>The presence of only two setae in the distal row on the posterior surface of the ventral tube is also quite unusual for species of the tigrina group. This feature brings it closer only to D. taigicola (Fjellberg, 1978), which differs, however, in having separated last abdominal segments and short macrosetae.</p><p>Distribution and ecology. The species appears to be fairly widespread across the eastern Palearctic, inhabiting both coastal tundra and inland taiga regions (Fig. 16).</p></div>	https://treatment.plazi.org/id/039C8798F365084308D2FE64FD2E1382	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Babenko, Anatoly;Fjellberg, Arne	Babenko, Anatoly, Fjellberg, Arne (2025): Three new Desoria species (Hexapoda, Collembola, Isotomidae) from the eastern Palaearctic. Zootaxa 5717 (1): 85-99, DOI: 10.11646/zootaxa.5717.1.5, URL: https://doi.org/10.11646/zootaxa.5717.1.5
039C8798F361084F08D2FF28FCAC136E.text	039C8798F361084F08D2FF28FCAC136E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Desoria cooki Babenko & Fjellberg 2025	<div><p>Desoria cooki sp. nov.</p><p>Figs 17–27</p><p>Type material. Holotype (sex not checked), north-eastern Chukotka, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-171.0452&amp;materialsCitation.latitude=65.5867" title="Search Plazi for locations around (long -171.0452/lat 65.5867)">Lavrentiya</a>, spotted tundra, mosses, 65.5867°N, 171.0452°W, 13.07.2013. O. Makarova &amp; A. Babenko leg. Paratypes, 22 specimens (including 16 juveniles), same area and collectors, but peat hillocks, 30.07.2013; 5 specimens (sex not checked) from hillock tundra, 28.07.2013; 4 specimens, same area, several different biotopes.</p><p>Additional material. 7 specimens, same region, ~ 20 km west of Lavrentiya, mountain tundra with a dense cover of Alectoria, 27.07.2013. O. Makarova &amp; A. Babenko leg.; 2 specimens (including 1 juvenile), vicinity of Anadyr airport (Ugolnye Kopi), rocky bank of a stream, near water, 02.07.2013. A. Babenko leg.</p><p>Specimens of D. multisetis auct. used for comparison. Female, Canada, Ellesmere Is., Alexander Fjord, 03.08.1983, dry upland tussock tundra, Dryas, Carex, Salix, moss [310/83]. A. Fjellberg leg.; female, Canada, location unknown [33/84]. V. Behan leg.; 1 specimen (sex not checked), Alaska, Denali Highway, 120 mi, 29.07.1980, moss &amp; grass at snow-edge, 4000 ft [85/80]. A. Fjellberg leg.; 1 specimen (sex not checked), Alaska, Cape Thompson, Odotoruk Creek Basin, 7– 11.08.1980, wet snow-bed meadow. D.A.B. Murray leg.; 1 specimen (sex not checked), Alaska, Canning River Delta, moss, swale, 23.07.1980, S.F. MacLean leg.; preadult male, Alaska, Nome, 01.09.1976, Sphagnum, Vaccinium, Ledum, Empetrum, lichens. R. Greenberg leg.; 2 specimens,Alaska, Eagle Summit, 01.08.1976, thick grass-turf on manured owl mound ~ 1200 m alt., A. Fjellberg leg.; 2 specimens, Alaska, 5.5 mi N of Franklin Bluffs, moist soil with Salix, moss, Arctostaphylos, Equisetum, 16.08.1976. A. Fjellberg leg.; 1 specimen (sex not checked), Alaska, steep Mt. across (E of) Galbraith Lake Camp, 18.08.1976, dry moss, lichens, Saxifraga, etc. in crevices on boulder [38]. A. Fjellberg leg.; 27 specimens, Chukotka, Magadan Region, Snezhnaya Dolina (AF-154 &amp; AF-155), 20.08.1978. A. Fjellberg leg.; 1 specimen (sex not checked), western Chukotka, Pevek, Apapelgino, 69.8111°N, 170.6142°E, hill top, zonal association (mosses), 24.07.2018. O. Makarova &amp; K. Makarov leg.</p><p>Diagnosis.A species of the pJasini -group sensu Potapov (2001) of the genus Desoria, characterized by macrosetae densely ciliated all around, clearly serrated mesosetae and a fairly large number of tergal macrosensilla.</p><p>Description. Body size up to 1.7–1.8 mm. Colour uniformly dark with numerous small lighter spots at bases of setae, ventral side lighter, dens and distal parts of legs more or less whitish. Body shape typical of the genus, Abd. V–VI clearly separated. Integument smooth, without visible granulation. Dorsal setal cover dense and strongly differentiated (Fig. 19), setal bases glandular as is typical of the group. Macrosetae rather long and densely ciliated all around (Figs 19, 22a), those on medial part of Abd. V about two times as long as tergum and 3–4 times as long as inner edge of hind unguis. Most mesosetae also more or less clearly serrated (Figs 22b–c), microsetae usually smooth and pointed (Fig. 22d). Dorsal macrosensilla distinctly differentiated, their number in juveniles being 77/66696 (Fig. 17), few additional macrosensilla usually present on some terga in adults, their position rather variable and some macrosensilla always present well in front of p-setae, especially on Abd. IV (Fig. 18). The number of microsensilla (11/111 ms) is typical of the group.</p><p>Antennae longer than head. Ant. IV with a bifurcate subapical pin seta and a rather large spherical subapical organite in a pit (Fig 24). Ant. III organ normal, with some additional setaceous sensilla in apical row. Few similar sensilla also present apically on Ant. II and laterally on Ant. I, sensilla on the latter segment slightly thickened. Each side of head with 6 large and two smaller (G and H) ocelli. PAO broadly oval, about 1.5 as long as diameter of nearest ocellus. Labrum with 4/554 setae, apical edge with 4 sharp apical folds and a simple apical ciliation (Fig. 23). Central part of clypeal field with up to 10 setae. Maxillary outer lobe with a bifurcate palp and 4 sublobal setae. Labial palp with apical papillae A–E present, 4 proximal setae and all usual guards (16); terminal setae of the papillae subequal to the guards, lateral process on papilla E strong, finger-shaped; hypostomal papilla with H also about as long as h1/h2. Basomedial field of labium with 6(7) setae, basolateral one with 5 setae as usual. Head ventrally with 5–6 postlabial setae on each side of ventral line. Mandibles normal, with moderately strong teeth. Maxillae with tridentate capitulum and 6 short lamellae covered with fine denticles only.</p><p>No ventral setae on thorax. Ventral tube with 7–12 frontal setae on each side, more than 10+10 lateral and up to 15 caudal setae with four setae in transversal apical row. Retinaculum with 4+4 teeth and 9–11 setae. Manubrium with a variable number of ventral setae and usually 4+4 short, slightly thickened, apical setae; ventroapical thickening usually simple (Fig. 20), rarely with a small subapical denticle (Fig. 21). Dens with numerous ventral setae, ventroapical one clearly elongated (Fig. 25). Dorsal side of dens with about 10 basal setae and 6–8 setae on each side of proximal half. Mucro typical of the group, with three subequal teeth (Figs 25). Tibiotarsi with 8(9) setae in apical whorl (Fig. 26), basal part of foreleg in adult and subadult specimens with three outer setae. Unguis with two clear teeth on inner edge and a pair of lateral ones basally; unguiculus about half as long as inner edge of unguis and usually with a corner tooth.</p><p>Etymology. The new species is named after the British captain James Cook, who, in 1778, mapped and named the Bay of St. Lawrence (the region of the type locality of the new species) during his third circumnavigation of the globe.</p><p>Affinities. The species is undoubtedly a new member of the Asiatic pJasini group, which has a number of features more typical of the genus Isotoma rather than Desoria (small PAO, two inner teeth on the unguis, reduced number of setae in apical row on tibiotarsi, mucro with three teeth, glandular base of setae), but it differs from representatives of Isotoma by the absence of spiny apical setae on the manubrium. At least 5 described species of this group are currently known: D. multisetis (Carpenter &amp; Phillips, 1922), D. hissarica Martynova, 1968, D. tadzhika Martynova, 1968, D. zlotini Martynova, 1968, and D. pJasini (Martynova, 1974) . Besides this, one Korean, i.e. D. choi (Lee, 1977), and two Chinese species, i.e. D. tianshanica Hao &amp; Huang, 1995 and D. imparidentata (Stach, 1964), also seem to be related to this group (Potapov 2001). A real comparison is only possible with the former five species checked by Potapov (2001). The strongly ciliated macrosetae, four proximal setae on the labial palp (see Potapov 2001, p. 139, although only tree such setae was mentioned for Greenlandic specimens of D. multisetis by Fjellberg 2007) and 6(7) setae in the basomedial part of the labium clearly bring the new species closer to D. multisetis .</p><p>The latter species was described from Northern Europe (Bjørnøya Island), and later also reported from Spitsbergen (Valpas 1967), Greenland (Fjellberg 2007, 2015), as well as Alaska, Canada and Chukotka (Potapov 2001). The latter author considered it as a complex of closely related species differing in mouth-part structure, sensillar chaetotaxy and other features which real position needs further study of the type specimens (p. 139). We have checked all material available to us on this species (see above) and can state that they do indeed differ in some features, the most obvious of which is the presence or absence of a free tooth on the manubrial thickening. At the same time, they all have only 55/444 macrosensilla on Th. II–Abd. III (vs 77/666 s in D. cooki sp. nov.), this corresponding to the description of this feature by Potapov (2001) and may, in our opinion, be a sufficient argument in favor of the independence of the described species.</p><p>Distribution and ecology. The species was found in a wide variety of communities in two areas of northeastern Chukotka, the distance between which is about 500 km (Fig. 27).</p></div>	https://treatment.plazi.org/id/039C8798F361084F08D2FF28FCAC136E	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Babenko, Anatoly;Fjellberg, Arne	Babenko, Anatoly, Fjellberg, Arne (2025): Three new Desoria species (Hexapoda, Collembola, Isotomidae) from the eastern Palaearctic. Zootaxa 5717 (1): 85-99, DOI: 10.11646/zootaxa.5717.1.5, URL: https://doi.org/10.11646/zootaxa.5717.1.5
039C8798F36D084C08D2FF28FAB516BB.text	039C8798F36D084C08D2FF28FAB516BB.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Desoria verticillata Babenko & Fjellberg 2025	<div><p>Desoria verticillata sp. nov.</p><p>Figs 28–39</p><p>Type material. Holotype, female, Russia, Central Yakutia (Sakha), Leno-Vilyui interfluve, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=126.7931&amp;materialsCitation.latitude=62.4003" title="Search Plazi for locations around (long 126.7931/lat 62.4003)">Gornyi Ulus</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=126.7931&amp;materialsCitation.latitude=62.4003" title="Search Plazi for locations around (long 126.7931/lat 62.4003)">Asyma</a>, burnt Larix forest, 62.4003°N, 126.7931°E, 21.06.2024. A. Burnasheva leg. Paratypes, 10 specimens (including 4 young instar juveniles), same biotope and collector, but 28.06.2022, 16.08.2023, 04.09.2023 &amp; 14.07.24.</p><p>Additional material. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=120.1975&amp;materialsCitation.latitude=59.4724" title="Search Plazi for locations around (long 120.1975/lat 59.4724)">Female</a>, south-west Yakutia, Tokko River, 59.4724°N 120.1975°E, first floodplain terrace, 2011, V. Boeskorov leg.; two juveniles , <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=139.6313&amp;materialsCitation.latitude=63.2408" title="Search Plazi for locations around (long 139.6313/lat 63.2408)">Suntar-Khayata Mt. Range</a>, upper reaches of Kyubyume River, vicinity of «Vostochnaya» Meteorological Station, 63.2408°N, 139.6313°E, willow bushes in floodplain, 30.07.2002, O. Makarova leg.</p><p>Diagnosis. A species of the violacea -group sensu Potapov (2001) (= hiemalis group sensu Fjellberg (2007)) of the genus Desoria, characterized by long, whorled serrated abdominal macrosetae, fused Abd. V–VI, and a manubrial thickening with a free tooth.</p><p>Description. Body size up to 1.9 mm (holotype). Colour usually rather light, grayish with irregular lighter spots, the largest specimens probably darker. Ventral side and appendages also coloured similarly. Body shape typical of the genus, Abd. V–VI completely fused (Figs 28). Integument without visible granulation. Dorsal setal cover clearly differentiated into micro-, meso- and macrosetae. Macrosetae long and clearly serrated, those on medial part of abdominal tip 3.8–4.9 times as long as inner edge of hind unguis. Serrations on macrosetae usually arranged in regular whorls (Fig. 29). Dorsal accp-sens located slightly anterior to p-rows of setae on both thorax and abdomen; total number of dorsal macrosensilla in young specimens 66/5,5-6,5-6,6-7,5-6 (Fig. 28), slightly more in larger individuals, especially at the abdominal tip; Abd. IV always without macrosensilla in mid tergal position. The number and position of spine-like microsensilla typical of the group (11/111) (Fig. 28).</p><p>Antennae clearly longer than head. Subapical pin seta on Ant. IV bifurcate, subapical organite not especially large, but usually spherical (Fig 30) (see also Remarks). AO on Ant. III normal, with 4 dorsal and 2 lateral sensilla, sensillar equipment of other antennal segments also typical. Head with 8+8 ocelli, ocelli G and H smaller. PAO elongate, about 1.7–2.1 as long as diameter of nearest ocellus (Fig. 31). Labrum with 4/554 setae, apical edge with sharp apical folds and composite ventroapical ciliation, central part of clypeal field with up to 10 setae. Maxillary outer lobe with a bifurcate palp and 4 sublobal setae. Labial palp with all usual apical papillae (A–E) present, 4 proximal setae and 16 guards including e7 at base of papilla E; terminal setae on papillae more or less subequal to guards, lateral process on papilla E finger-like, shorter than papilla; hypostomal papilla with H also subequal to h1/h2. Both basomedial and basolateral fields of labium with 5 setae each. Ventral side of a head with 4–6 postlabial setae each side of ventral line. Mandibles and maxillae without visible modifications.</p><p>No ventral setae on thorax. Ventral tube with 6–8+6–8 frontal setae, 7–11+7–11 lateral and up to 14 caudal setae with four ones in apical row including two longer ones. Retinaculum with 4+4 teeth and up to 12–13 setae. Manubrium with numerous ventral setae including 2+2 short ones between apical macrosetae (Fig. 32); ventroapical thickening with a large free tooth (Fig. 33). Dens with numerous ventral (anterior) setae and up to 15–16 dorsal (posterior) ones in the proximal half (Figs 34–35), ventroapical seta not prolonged (Fig. 36). Mucro with four teeth, apical and subapical ones almost subequal, a lateral seta absent (Fig. 36). Tibiotarsi with 11 acuminate apical setae (Fig. 37), basal part of foreleg with three outer macrosetae and several additional microsetae (Fig. 38). Unguis with a clear inner tooth and a pair of lateral ones; unguiculus about half as long as inner edge of unguis, usually with a corner tooth (Fig. 37).</p><p>Etymology. The name of the new species reflects the unique whorled serration of the dorsal macrosetae (from the Latin verticillatus, meaning whorled or verticillate).</p><p>Remarks. At the type locality of the new species, one juvenile specimen was also found, which, unlike the described species, had weakly serrated macrosetae and a tiny, peg-like subapical organite (Fig 39). As seasonal morphological changes are quite typical for closely related species of the genus, possibly this is simply a cyclomorphic form of the same species, but a co-occurrence of closely related forms cannot be ruled out either.</p><p>Affinities. The new species is a fairly typical representative of the violacea group sensu Potapov (2001), possessing all of its characteristic features: labrum with sharp apical folds, complete labial palp with e7 present and four proximal setae, bifurcate maxillary palp, basomedial field of labium with 5 setae, short maxillary lamellae, ventral tube with 4 setae in the apical transverse row on posterior side, crenulated dens and mucro with four teeth and without lateral seta. Among the species of this group, only three species are known that, like D. verticillata sp. nov., show a free tooth on the manubrial thickening: D. neglecta (Schäffer, 1900), D. blufusata (Fjellberg, 1978) and D. alaskensis (Fjellberg, 1978) . Moreover, due to the fused last abdominal segments and long dorsal macrosetae, the new species is only comparable with D. alaskensis, which is not only sympatric, at least in the eastern Palearctic, but sometimes it also occurs in the same biotopes. In addition to the peculiar serration of the macrosetae and different coloration (light gray in D. verticillata sp. nov. and dark, almost black in D. alaskensis), the new species is characterized by a lower number of dorsal sensilla (66/5,5-6,5-6,7,5- 6 in D. verticillata sp. nov. vs 77/6,7,7,12,9 in juvenile specimens of D. alaskensis including several ones in mid tergal position on Abd. IV [thorax and abdomen with many accp-sensilla (7–9) according to Potapov (2001, p. 122)] and a smaller number of dorsal setae on dens (15–16 in D. verticillata sp. nov., vs 25–45 posterior (dorsal) setae, including several long ones in D. alaskensis according to Potapov (2001, p. 122)).</p><p>The North American fauna supports another species of the genus, D. randiella (Fjellberg, 1978), characterized by the presence of a free tooth on the manubrium, fused Abd. V–VI and rather long dorsal setae. However, clearly it is not close to the new species under consideration, being distinguished by a simple maxillary outer lobe, small and rounded apical folds on the labrum and an unusually sparse setal cover on the manubrium and dens.</p><p>Distribution and ecology. The species is apparently quite widespread, at least in Yakutia, and is known from three rather remote regions of this republic (Fig. 40), the maximum distance between which exceeds 1200 km.</p></div>	https://treatment.plazi.org/id/039C8798F36D084C08D2FF28FAB516BB	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		MagnoliaPress via Plazi	Babenko, Anatoly;Fjellberg, Arne	Babenko, Anatoly, Fjellberg, Arne (2025): Three new Desoria species (Hexapoda, Collembola, Isotomidae) from the eastern Palaearctic. Zootaxa 5717 (1): 85-99, DOI: 10.11646/zootaxa.5717.1.5, URL: https://doi.org/10.11646/zootaxa.5717.1.5
