Jacekaphorura sakhaensis Pomorski & Babenko, 2010, sp. nov.

• Main Authors: Pomorski, Romuald J., Babenko, Anatoly
• Format: Other/Unknown Material
• Language: unknown
• Published: 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Entognatha; Collembola; Onychiuridae; Jacekaphorura; Jacekaphorura sakhaensis; Sakha; Suntar; Kyubyume; Makarova; Cassiope tetragona; Salix polaris; Tundra; Yakutia
• Online Access: https://zenodo.org/record/6195942; https://doi.org/10.5281/zenodo.6195942

Jacekaphorura sakhaensis sp. nov. Figs 1–9 Type material. Holotype, female, Russia, Yakutia (Sakha), Suntar–Khayata Mt. Range, upper current of Kyubyume River [63 0 13 ’N 139 0 32 ’E], ca. 1800 m alt., stony terrace, Salix tschuktschorum, Cassiope tetragona, Cetraria spp., 9.vii. 2002, O. Makarova leg. Paratype, juvenile, same region, but ca. 2000 m alt., alpine tundra with Salix polaris, Dryas punctata, Carex ensifolia arctisibirica, 15.vii. 2002, O. Makarova leg. The types are deposited in MSPU collection. Description. Holotype length without antennae 2.9 mm. Colour of specimens preserved in alcohol white. Body shape cylindrical, abdominal tip broadened, Abd. 6 small, poorly separated from and partly hidden under Abd. 5. Antennae thin, slightly longer than head, antennal base not well marked. Ant. 4 with cauliflower-like apical papilla, subapical organite and microsensillum present (Figs 1–2). AO consists of 5 long and narrow papillae, two smooth sensory rods, two sensory clubs, straight and granulated [or “morel-like” according to Weiner (1996)], 5 guard setae, and lateral microsensillum (Figs 2–3). Ant. 1–2 with 26–27 and ca. 70 setae, correspondingly, other antennal segments also with increased number of setae clearly differentiated in size. PA O long with 34–38 simple vesicles (Fig. 4). Labrum with 9 setae and 4 prelabral setae. Labium of A - type, with all 5 usual papillae (A–E), 7 long guards, and 9–10 proximal setae, basal fields with 4 + 5 setae (Fig. 5). Maxillary palp simple with two sublobal hairs. Dorsal pseudocellar formula (pso) as 42 / 133 / 33333 (holotype) or 32 / 133 / 33333 (paratype, juvenile), antennal pseudocelli in a form of triangle, medial hind pseudocellus on head moved slightly forward (Figs 6, 8). Number of ventral pso 2 /000/0111, but holotype with 1 + 2 ventral pso on Abd. 4; ventral pseudocelli on head in usual position: medial and postero-lateral; ventral pso on abdomen as Fig. 9. Accurate number of parapseudocelli (psx) is undetectable because of lack of material, but psx ...