Prosoma pale yellow. Chelicerae pale yellow. Legs yellowish. Opisthosoma pale yellow.
Body length female: 1.6 mminhabiting caves
Troglobiont species (Mammola et al. 2018)
Branco V V, Morano E, Cardoso P (2019) An update to the Iberian spider checklist (Araneae). [N.B.: few records from this paper are not taken over and not commented] Zootaxa 4614: 201-254
Mammola S, Cardoso P, Ribera C, Pavlek M, Isaia M (2018b) A synthesis on cave-dwelling spiders in Europe. Zoological Systematics and Evolutionary Research 56: 301-316
Saaristo M I (1973) Birgerius gen. n. (Araneae: Linyphiidae). Annales Zoologici Fennici 10: 449-450
WSC (2021) World Spider Catalog. Version 21.5. Natural History Museum Bern, online at http://wsc.nmbe.ch (03.01.2021) doi: 10.24436/2