Sources

References:

Dippenaar-Schoeman A (1990) A revision of the African spider genus Seothyra Purcell (Araneae: Eresidae). Cimbebasia 12: 135-160.

El-Hennawy HK (1997) Redescription of the male of Dorceus quadrispilotus Simon, 1908 from Egypt (Araneae: Eresidae). In: Seldon PA (ed.), Proceedings of the 17th European Colloquium of Arachnology, Edinburgh 1997. Edinburgh, pp. 97-100.

El-Hennawy  HK (2002) Revision of the North African spider genus Dorceus C. L. Koch 1846 (Araneida: Eresidae). Serket 8: 57-72.

Kraus O, Kraus M (1988) The genus Stegodyphus (Arachnida, Araneae). Sibling species, species groups, and parallel origins of social living. Verhandlungen Naturwissenschaften Vereins Hamburg (NF) 30: 151-254.

Kraus O, Kraus M (1992) Eresid spiders in the neotropics: Stegodyphus manaus n.sp. (Arachnida, Araneae, Eresidae). Verhandlungen Naturwissenschaften Vereins Hamburg 33: 15-19.

Lubin Y, Henschel J (1990) Foraging at the thermal limit: burrowing spiders (Seothyra, Eresidae) in the Namib desert dunes. Oecologia 84: 461-467.

Miller J, Griswold C, Scharff N, Řezáč M, Szűts T, Marhabaie M (2012) The velvet spiders: an atlas of the Eresidae (Arachnida, Araneae). ZooKeys 195: 1–144.

Pickfrod M (2000) Fossil spider's webs from the Namib Desert and the antiquity of Seothyra (Araneae, Eresidae). Annales de Paléontologie 86: 147–155.

Řezáč M., Pekár S. and Johannesen J (2008) Taxonomic review and phylogenetic analysis of central European Eresus species (Araneae: Eresidae). Zoologica Scripta 37: 263-287.

Web sources related to velvet spiders:

Platnick Catalog 

The Spider guide of South Africa 

Cape museum IZIKO 

Spiders of NW Europe 

Jorgen Lissner´s page

Spider Lab Aarhus Uni