Willowsia potapovi Zhang, Chen & Deharveng, 2011

Baquero, Enrique, Potapov, Mikhail & Jordana, Rafael, 2021, New species and records of Entomobryidae and Orchesellidae (Collembola) from the East Caucasus (Russia), Zootaxa 4991 (2), pp. 247-270 : 263-265

Willowsia potapovi Zhang, Chen & Deharveng, 2011

( Figs 3C , 8A–F )

Studied material. RUSSIA, North Caucasus, Dagestan. Buinak district (center), ~ 4km from the Gimrin Tunnel , valley of the Cholpu-Ozen stream, beech-oak forest, rotten wood, (42.785318, 46.979158, 865m a.s.l.), 22.iv.2018, funnel extractions, one specimen on a slide, sample code: CAU2018-37 - 05 , Kuznetsova N., Potapov M., and Kremenitsa A. leg.

Remarks. The color pattern of the specimens found fully matches that of the original description ( Fig. 3C ). Only a few characters can be added to those included in the original description: maxillary palp bifurcate, with three sublobal chaetae; tibiotarsus not sub-segmented, without smooth chaetae, except for smooth terminal chaeta on legs III; empodium lanceolate, with serrated external lamella (pe) in leg III ( Fig. 8F ); scale sculpture type B (short rib type, narrow scales, following Zhang et al. 2011) as in Fig. 8E ; manubrial plate with six chaetae and two pseudopores.

Macrochaetotaxy ( Figs 8A–D ). Simplified Mc formula: 4-1-0-3-2/3-4/2-4/0-2-1/0-2-1-2-2. Head: H1 area with Mc An 2, An 3a1, and An 3 and an additional chaeta; H2 area with one Mc (A 5); H4 area with three Mc (S 1, S 3, and S 4i); H4’ area with three Mc (S 5, S 5i and S 4); H5 area with Ps 2 and Ps 5 Mc. Mesothorax: area T1 with three Mc (m 1, m 2, and m 2i); T2 with four Mc (a 5, m 4, m 4i, and m 4p) (five in the description of Zhang et al. 2011). Abdomen: Abd II area A1 with two Mc (a 2 and a 3), area A2 with four Mc (m 3, m 3e, m 3ea, m 3ep); Abd III without Mc on A3, two Mc on area A4 (a 2 and a 3), and one on A5 (m 3); a 6 and m 6 as Mc, ‘s’ and ‘ms’ between m 6 and p 6 not seen, but probably present; Abd IV without Mc on A6, two on A7 (A 3 and C 1), one on A8 (B 4), two on A9 (A 5 and Ae 5pp), two on A10 (A 6 and B 6); sensillar formula normal as in the rest of Entomobryidae : 2,2/1,2,2,4; microsensillar formula: 1,0/1,0,1.

Genus Sinella, Brook,1882

Figures

FIGURE 3. Habitus of some species. A, E. nicoleti; B, Entomobryoides dagestanicus sp. nov.; C, Willowsia potapovi (bar 0.25 mm).

FIGURE 8. Willowsia potapovi. A, head macrochaetotaxy; B, ThII dorsal macrochaetotaxy; C, AbdII–III dorsal macrochaetotaxy; D, AbdIV dorsal macrochaetotaxy; E, scales; F, claw and empodium (scale bars: A–D, 0.1mm; E, 0.01mm; F, 0.025mm).