Centromerus clarus (L. Koch, 1879)
Description
Male
Chelicerae with faint stridulation ridges laterally, 2-3 teeth on the anterior margin of the fang groove, and with a longitudinal row of very short spines antero-laterally. Palp: paracymbium with a serrated edge with one of the teeth stouter. Bulbus with a broad posterior apophysis, round, border with 6 small black teeth. Prosoma length: 1.0 mm, prosoma width: 0.7 mm.
Female
Chelicerae with 3 teeth on anterior margin but without the longitudinal row of spines and the stridulating ridges of the male. Epigyne: scape broad and short, apically broadly truncate. Parmula wider than long with short and broadly rounded tip. Prosoma length: 1.0 mm, prosoma width: 0.7 mm.
Distribution
Figures
Pedipalp, retrolateral view
(Eskov & Marusik 1992b)
Pedipalp, ventral view
(Eskov & Marusik 1992b)
Pedipalp, retrolateral view
(Fomichev & Koponen 2024)
Epigyne
(Eskov & Marusik 1992b)
Epigyne
(Fomichev & Koponen 2024)
Distribution List
"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.
References
Eskov K Y, Marusik Y M (1992b) The spider genus Centromerus (Aranei Linyphiidae) in the fauna of Siberia and the Russian Far East, with an analysis of its distribution. Arthropoda Selecta 1(2): 33-46 
Esyunin S L, Efimik V E (1996a) Catalogue of the spiders (Arachnida, Aranei) of the Urals. KMK Scientific Press, Moscow, 228 pp.
Fomichev A A, Koponen S (2024) The first data on subnivean activity of spiders (Arachnida: Aranei) in Southwestern Siberia (Russia). Acta Biologica Sibirica 10: 1211-1228
Koponen S, Marusik Y M, Tanasevitch A V (1998) New data on the spider fauna of the Polar Urals (Aranei). Arthropoda Selecta 6: 109-119
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2