Appendisotoma sibirica Stebayeva 1985

• Main Authors: Potapov, Mikhail, Babenko, Anatoly, Bu, Yun, Bayartogtokh, Badamdorj, Gulgenova, Ayuna, Luan, Yun-Xia
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2024
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Collembola; Entomobryomorpha; Isotomidae; Appendisotoma; Appendisotoma sibirica; taiga; Siberia
• Online Access: https://doi.org/10.5281/zenodo.11240625; http://treatment.plazi.org/id/625CA83FFF96FFFFFF6EBE54FD74AB8B

Appendisotoma sibirica Stebaeva, 1985 Figs 43–59, 64 Material: Winter form. Russia, West Siberia, Kemerovo Region, 10 km SE from Mezdurechensk, left bank of Tom’ River, Kuznetsky Alatau Ridge, mountain taiga, under Abies sibirica , 18.10.1981, leg. S.S. (holotype and 6 paratypes). Kemerovo Region, nearby Kuzedeevo, Biyskaya Griva Ridge (Altai Mts.), mixed forest ( Abies, Tilia ), 16– 17.09.1994, leg. O. Berezina. Summer form: Russia, West Siberia, Kemerovo Region, Salair Ridge, Mixed forest ( Abies, Pinus, Populus ), litter, 10.10.2020, leg. N. Kuznetsova and М.P., N 54.2681 E 85.42581 (mixed with winter form). Tomsk Region, ~ 10 km W from Tomsk, Timiryazev forestry, litter under Pinus sibirica, 23.08.1984, leg. N. Kuznetsova and М.P. Description. No less than 1.3 mm (for the largest known subadult individual). Corpus stout (Fig. 55). Greyish blue, spotty, not very dark. Abd.V separated from Abd.IV and fused with Abd. VI. Cuticle with thin hexagonal primary granulation, coarser at posterior edges of body tergites. Ocelli 8+8 (Figs 58, 59), G and H smaller. Ratio PAO length: ocellus = 1.2–1.5. PAO ca 0.4 as long as width of Ant.I and much shorter than inner unguis length (0.5– 0.7). Maxillary head with unmodified lamellae. Maxillary outer lobe with 4 sublobal hairs, maxillary palp bifurcate. Labrum with 4 well visible sharp apical fields. Labral formula as 4/5,5,4. Labium with 5 usual papillae ( А–Е ) and labial formula A1, B4, C0, D4, E7 (16 guards at whole), guard chaetae e7 present, with 4 proximal (Fig. 45), 4 basomedian and 5 basolateral chaetae. Ventral side of head with 4+4 chaetae.Ant.I with 16–17 common chaetae (11 of basal set and 5–6 additional ones), 3–4 s-chaetae (one in more proximal position shorter) and 5 bms-chaetae, 3 dorsal and 2 ventral. Ant.II with 1 latero-distal s and 5 bms (2 dorsal set together, 2 ventral and 1 additional). Ant.III with 1 bms and 6 distal s (including 2 lateral), without additional s-chaetae (Fig. 49). S-chaetae on Ant. IV weakly differentiated. Organite small, ...