Dactylopisthoides transbaicalicus (Marusik, Koponen & Danilov, 2001) Tanasevitch & Marusik, 2023

Tanasevitch, Andrei & Marusik, Yuri, 2023, On the synonymy of Dactylopisthoides Eskov, 1990 and Uusitaloia Marusik, Koponen & Danilov, 2001 (Araneae, Linyphiidae), ZooKeys 1184, pp. 291-299 : 291

Dactylopisthoides transbaicalicus (Marusik, Koponen & Danilov, 2001) comb. nov.

Figs 3C , 4

Uusitaloia transbaicalica Marusik, Koponen & Danilov, 2001: 90, figs 39-48 (♂).

U. transbaicalica : Marusik and Koponen (2009): 21, figs 1c-e, 2a-c (♂).

Types.

Holotype ♂ (ZMUT), Russia, Buryatia, Barguzin Mt. Range, Olso River, 54°52'N, 110°55'E, 1650 m, 04.VII.1996, leg. M. Uusitalo.

Comments.

No SEM figures are provided for this species, as it remains known from the holotype male only.

Diagnosis.

From D. hyperboreus and D. wrangelianus , this species differs in having the longer and narrower dorsal tibial outgrowth (cf. figs 40, 41, 43, 44 in Marusik et al. [2001] and Figs 1C , 2B ) and the reduced radical tooth of the embolic division (cf. Fig. 3C and Fig. 3A, B ).

Distribution.

Only the type locality, Transbaikalia, Russia.

Figures

Figure 1. Details of the male palp (A-E) and epigyne (F) of Dactylopisthoides hyperboreus Eskov, 1990, specimens from the type locality A-C right palp, retrolateral (A, B) and dorsal view (C), respectively D, E bulb, lateral view, different aspects F epigyne, ventral view. Abbreviations: dsa - distal suprategular apophysis, ep - embolus proper, mm - median membrane, mt - median tooth, pp - posterior projections of lateral walls, r - radix, rt - radical tooth.

Figure 2. Details of the male palp (A-E) and female epigyne (F) of Dactylopisthoides wrangelianus (Marusik & Koponen, 2009), specimens from Mamontovaya River, Wrangel Isl A-D right palp, retrolateral, dorsal, ventral and frontal view, respectively E embolic division, frontal view F epigyne, ventral view. Abbreviations: dsa - distal suprategular apophysis, ep - embolus proper, mm - median membrane, mt - median tooth, pp - posterior projections of lateral walls, r - radix, rt - radical tooth.

Figure 3. Frontal view of the embolic divisions of Dactylopisthoides hyperboreus Eskov, 1990 (A), D. wrangelianus (Marusik & Koponen, 2009) (B) and D. transbaicalicus (Marusik, Koponen & Danilov, 2001) [reproduced from Marusik and Koponen (2009)] (C). Abbreviations: dsa - distal suprategular apophysis, mm - median membrane, mt - median tooth, rt - radical tooth. Black, thick arrows show additional differences between species. Scale bar: 0.1 mm (S).

Figure 4. Collecting localities of Dactylopisthoides species: D. hyperboreus (dot), D. transbaicalicus (diamond), D. wrangelianus (square), records of D. hyperboreus that could also refer to D. wrangelianus (triangle).