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
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