Subisotoma multisensillata Potapov, Babenko, Fjellberg & Greenslade, 2009, sp. nov.

• Main Authors: Potapov, Mikhail, Babenko, Anatoly, Fjellberg, Arne, Greenslade, Penelope
• Format: Other/Unknown Material
• Language: unknown
• Published: 2009
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Entognatha; Collembola; Isotomidae; Subisotoma; Subisotoma multisensillata; Tundra
• Online Access: https://zenodo.org/record/5687509; https://doi.org/10.5281/zenodo.5687509

Subisotoma multisensillata sp. nov. Folsomides pusillus: Stebaeva 1973 Figs 8, 51–57, Tab. 2 Type material. Holotype, male, Russia, northern Altai, right bank of Katun’ river, Ust’–Sema [51 ° 39 ’N, 85 ° 45 ’E], plant debris on sandy bank, 27.vii. 2000, leg. S. Matalin (MSPU). Paratypes: 52 specimens, Southeastern Altai, Bolshoi Kuraiskii Mt. Range, 3,100 m. alt., mountain tundra, 19.viii. 1963; 10 specimens, same region, 19.vi. 1964; 15 specimens, same region, 27.vii. 1963; 27 specimens, same region, 12.vii. 1964, leg. S. Stebaeva; 1 male, Mongolia, somon Khank, Eastern Sayan, 2800 m alt., steppe meadow with Festuca sp, leg. A. Druk (MSPU). Description. Size up to 1.5 mm. Colour dark, almost-black, with numerous lighter spots. Cuticle with strong pits (larger on head) (Figs 53, 57). Ocelli 8 + 8, H and G clearly smaller (Fig. 52). PAO elliptic, without constriction, about 1.5 as long as ocellus diameter and 0.6–0.8 as long as inner unguis. Maxillary palp simple with 4 sublobal chaetae. Labrum with 2 / 554 chaetae. Labium with all papillae A–E present, papilla E with 6 guard chaetae (e 7 absent), proximal chaetae 3. Basomedial field of labium with 4 chaetae, basolateral with 5. Ventral side of head usually with 4 + 4 postlabial chaetae. Ant. 1 with 2 bms, dorsal and ventral, and 2 ventral sensilla (s), Ant. 2 with 3 bms and 1 distal s, Ant. 3 with 1 bms and 5 distal s, including 1 lateral in АО. Inner sensilla of АО clearly broadened. Dorsal side of Ant. 3 with 2–4 additional sensilla set in two separate groups (Fig. 55). Ant. 4 with numerous poorly differentiated sensilla, subapical organite small, microsensillum present. All terga with dense cover of short uniform chaetae, macrochaetae poorly developed. Longest chaetae on Abd.V 0.15–0.22 as long as tergal length. Dorsal axial chaetom of Th.II–Abd.III as 10–11,8 – 9 / 7,7–8,7 – 8. Tergal macrosensilla rather short, clearly differentiated from ordinary chaetae. The total number of sensilla is not stable and may vary even in a single specimen: 4–7,6 – 12 / 4–5,3 ...