Sibirocosa trilikauskasi, Omelko, Mikhail M. & Marusik, Yuri M., 2013

Omelko, Mikhail M. & Marusik, Yuri M., 2013, A survey of East Palaearctic Lycosidae (Araneae). 9. A review of Sibirocosa with a description of three new species, Zootaxa 3666 (3), pp. 319-330 : 328-329

Sibirocosa trilikauskasi sp. n.

Figs 11–13 , 20, 26 , 32, 38 , 57–59

Sibirocosa kolymensis: Trilikauskas 2007: 87 (misidentification); Trilikauskas 2008: 192 (misidentification).

Types. Holotype 3 (ZMMU) and paratype Ƥ (ZMMU) from Russia, Khabarovsk Province, source of Lednikovyi Spring, mountain tundra, Summer 2001 (L. Trilikauskas).

Etymology. The specific name is a patronym in honour of our friend and colleague Laimonas Trilikauskas (Novosibirsk) who collected the holotype and paratype, in recognition of his initiation of what became an intensive study of the spider fauna of Tuva.

Diagnosis. Males of this new species are most similar to those of S. kolymensis and can be distinguished by the shorter and broader embolus (cf. Figs 21, 26 ). Females of S. trilikauskasi sp. n. are most similar to those of S. sibirica and the two species are almost indistinguishable. However, S. trilikauskasi sp. n. has relatively longer receptacles that reach the level of the apical pocket (cf. Figs 56, 59 ).

Description. Male. Total length 6.95, carapace 3.65 long, 2.7 wide. Carapace dark brown without pattern. Legs brown with annulations. Femur I with 3 dorsal, 2 pro- and 2 retrolateral spines; patella with 2 dorsal, 1 pro- and 1 retrolateral spines; tibia with 2 dorsal, 1 pro-, 1 retrolateral and 6 pairs of ventral spines metatarsus with 2 pro, 2 retrolateral and 2 pairs of ventral spines. Leg I segments length: 3.15+1.4+3.15+3.0+1.5. Abdomen brownish grey with indistinct cardiac mark and white spots. Palp as in Figs 11-13 , 20, 26 , 32, 38 .

Female. Total length 6.65, carapace 3.3 long, 2.25 wide. The only specimen is poorly preserved, with the colouration of the carapace and abdomen faded. Legs brown with annulations. Femur I with 3 dorsal, 2 pro- and 2 retrolateral spines; patella with 2 dorsal, 1 pro- and 1 retrolateral spines; tibia with 2 dorsal, 1 pro-, 1 retrolateral and 5 pairs of ventral spines metatarsus with 2 pro-, 2 retrolateral and 2 pairs of ventral spines. Leg I segments length: 3.15+1.4+3.0+2.5+1.3. Epigyne as in Figs 57–59 .

Distribution. Known only from the type locality ( Fig. 64 ).

Figures

FIGURE 64. Distribution of Siberia and Far Eastern species of Sibirocosa: S. kolymensis (), S. koponeni sp. n. (), S. manchurica (), S. nadolnyi sp. n. (), S. sibirica (), S. subsolana () and S. trilikauskasi sp. n. ().

FIGURES 8 – 14. Male palps of Sibirocosa species. Sibirocosa subsolana (8), S. manchurica (9), S. koponeni sp. n. (10), S. trilikauskasi sp. n. (11 – 13) and S. nadolnyi sp. n. (14). 8 – 10, 13 – 14 — ventral; 11 – 12 — tegulum and tegular apophysis, anterior and ventral. Scale = 0.2 mm.

FIGURES 15 – 26. Embolic division of Sibirocosa species. Sibirocosa kolymensis (15, 21), S. koponeni sp. n. (16, 22), S. manchurica (17, 23), S. sibirica (18, 24), S. subsolana (19, 25) and S. trilikauskasi sp. n. (20, 26). 15 – 20 — ventral; 21 – 26 — anterior. 15, 18, 21, 24 after Marusik et al. (2004). Scale = 0.2 mm. Abbreviations: Co conductor, Em embolus, Pa palea, Ta terminal apophysis.

FIGURES 27 – 38. Embolic division of Sibirocosa species. Sibirocosa kolymensis (27, 33), S. koponeni sp. n. (28, 34), S. manchurica (29, 35), S. sibirica (30, 36), S. subsolana (31, 37) and S. trilikauskasi sp. n. (32, 38). 27 – 32 — retrolateral; 33 – 38 — posterior. 27, 30, 33, 36 after Marusik et al. (2004). Scale = 0.2 mm. Abbreviations: Co conductor, Em embolus, Pa palea, Ta terminal apophysis.

FIGURES 45 – 59. Epigynes of Sibirocosa species. Sibirocosa koponeni sp. n. (45 – 47), S. kolymensis (48 – 49), S. manchurica (50 – 51), S. subsolana (52 – 54), S. sibirica (55 – 56) and S. trilikauskasi (57 – 59). 45 – 46, 48, 50, 52, 55, 57 – 58 — ventral; 47, 49, 51, 54, 56, 59 — dorsal. 49, 51, 56 after Marusik et al. (2004). Scale = 0.2 mm. Abbreviations: Ap apical pocket, Ff floor of fovea, Fo fovea, Re receptacle.