Sidydrassus, Esyunin & Tuneva, 2002

Fomichev, Alexander A., 2022, A survey of the East Palaearctic Gnaphosidae (Araneae). 12. A review of Sidydrassus Esyunin & Tuneva, 2002, Zootaxa 5194 (2), pp. 260-272 : 270-271

publication ID

https://doi.org/ 10.11646/zootaxa.5194.2.7

publication LSID

lsid:zoobank.org:pub:3B4E0082-F3B6-485B-8376-68112C27C970

DOI

https://doi.org/10.5281/zenodo.7148891

persistent identifier

https://treatment.plazi.org/id/BA4C87EF-FF9F-4913-FF60-324B52CD1EDA

treatment provided by

Plazi

scientific name

Sidydrassus
status

 

Key to Sidydrassus View in CoL species

Males

1 Median apophysis with a prolaterally bent branch ( Figs 25, 29 View FIGURES 25–30 )........................................ S. shumakovi View in CoL - Median apophysis without a prolaterally bent branch ( Figs 13, 16 View FIGURES 13–18 , 20, 23 View FIGURES 19–24 , 31, 35 View FIGURES 31–36 ).................................. 2 2 RTA 4 times shorter than tibia ( Figs 31–33 View FIGURES 31–36 )............................................................ S. rogue View in CoL - RTA as long as tibia or twice shorter than tibia ( Figs 13–18 View FIGURES 13–18 )................................................... 3 3 RTA as long as tibia ( Figs 13–15 View FIGURES 13–18 )............................................................ S. saiynovi sp. n. - RTA twice as short as tibia ( Figs 16–18 View FIGURES 13–18 )....................................................... S. tianschanicus View in CoL

Females (female of S. saiynovi sp. n. is unknown)

1 Epigynal fovea slit-shaped, not contiguous with the epigastric furrow ( Figs 37–38 View FIGURES 37–43 )........................ S. shumakovi View in CoL

- Epigynal fovea wide and round, contiguous with the epigastric furrow ( Figs 40, 42 View FIGURES 37–43 )................................ 2

2 Epigynal fovea 2.1 times longer than wide, anterior and posterior receptacles equal in size ( Figs 42–43 View FIGURES 37–43 )........................................................................................................ S. tianschanicus View in CoL

- Epigynal fovea 1.7 times longer than wide, anterior receptacles significantly larger than the posterior ones ( Figs 40–41 View FIGURES 37–43 )................................................................................................... S. rogue View in CoL

Possible relationships within Sidydrassus

Of the four species currently assigned to the genus, S. saiynovi sp. n., S. tianschanicus , and S. rogue seem to be closely related as they are similar in having the median apophysis without a prolateral branch, similar proportions of the embolic base, the wide epigynal fovea, the diverging anterior receptacles and posterior receptacles without pronounced heads ( Figs 13, 16 View FIGURES 13–18 , 20, 23 View FIGURES 19–24 , 31, 35 View FIGURES 31–36 , 40–43 View FIGURES 37–43 ). The generotype, S. shumakovi , stays apart and possesses the median apophysis with a prolateral branch, the thick embolic base, the slit-shaped epigynal fovea, the converging anterior receptacles and the posterior receptacles with pronounced heads ( Figs 25, 29 View FIGURES 25–30 , 37–39 View FIGURES 37–43 ). Thus, all the Sidydrassus species can be divided into two species groups: the shumakovi -group (one species) and the tianschanicus -group (three species) ( Table 1 View TABLE 1 ).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Gnaphosidae

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