Firmicus bivittatus Simon, 1895
Description
Male
Prosoma and sternum black. Antrior legs (except metatarsi and tarsi) black, metatarsi and tarsi I-IV pale yellow. Opisthosoma: dorsum white, with 2 broad, black longitudinal bands, venter blackish brown, with a white line on each side.
Female
Prosoma yellowish brown, ocular area and clypeus brown, with a thin black marginal line and 2 black longitudinal bands. Sternum yellowish brown. Anterior legs blackish, metatarsi and tarsi red-brown, femur II lighter, posterior legs yellowish brown. Opisthosoma long, dirty white, dorsum with 2 thin black bands, slightly undulating.
Distribution
Figures
Pedipalp
(Simon 1932)
Pedipalp, prolateral view
(Deltshev 2017)
Pedipalp, retrolateral view
(Deltshev 2017)
Pedipalp, ventral view
(Deltshev 2017)
Pedipalp, ventral view
(Domènech et al. 2023)
Habitus, dorsal view
(Domènech et al. 2023)
Epigyne
(Deltshev 2017)
Epigyne
(Domènech et al. 2023)
Epigyne
(Miquet & Oger 2024)
Vulva, dorsal view
(Deltshev 2017)
Vulva
(Deltshev 2017)
Vulva, dorsal view
(Miquet & Oger 2024)
Habitus, dorsal view
(Domènech et al. 2023)
Habitus, dorsal view
(Miquet & Oger 2024)
Distribution List
References
Beladjal L, Bouseksou S, Kherbouche-Abrous O, Alioua Y, Bosmans R (2025) First exhaustive catalog of spiders of Algeria (Arachnida: Araneae). Zootaxa 5598: 1-185 
Branco V V, Morano E, Cardoso P (2019) An update to the Iberian spider checklist (Araneae). Zootaxa 4614: 201-254
Deltshev C (2017) Redescription of the poorly known crab spider Firmicus bivittatus (Araneae: Thomisidae). Arachnologische Mitteilungen 53: 9-11
Domènech M, Méndez Ó, Espigulé-Pons J, Carbonell R, Pinilla-Rosa M (2023) Nuevas citas aracnológicas (Araneae) en Cataluña (NE de la Península Ibérica). Revista Ibérica de Aracnología 42: 159-166
Miquet A, Oger P (2024) Redécouverte de Firmicus bivittatus Simon, 1895 (Araneae: Thomisidae) en France. Revue Arachnologique (2) 11: 21-23
Simon E (1932) Les arachnides de France 6 (4). Paris (Roret): 773-978
WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.5.2026) doi: 10.24436/2