| Calculus bicolor | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Araneomorphae |
| Family: | Orsolobidae |
| Genus: | Calculus Purcell, 1910 |
| Species: | C. bicolor |
| Binomial name | |
| Calculus bicolor Purcell, 1910 | |
Calculus bicolor, the sole species of the genus Calculus, is a South African spider in the family Orsolobidae. Individuals are 4 mm in length, although only juveniles have been described. The abdomen is pale yellow with a broad brown patch and black markings on the sides of the spinnerets. Calculus bicolor was described in 1910 by William F. Purcell, and long assigned to the Oonopidae (goblin spiders), until a 2012 study assigned Calculus to the family Orsolobidae on the basis of sensory organs that differed from those of oonopids.
References
- ^ "Gen. Calculus Purcell, 1910". World Spider Catalog. Natural History Museum Bern. Retrieved 2016-02-25.
- Purcell, W. F. (1910). "The phylogeny of the tracheae in Araneae". Quarterly Journal of Microscopical Science. 54: 519–564.
- Platnick, Norman I.; et al. (2012). "Tarsal organ morphology and the phylogeny of goblin spiders (Araneae, Oonopidae), with notes on basal genera" (PDF). American Museum Novitates (3736): 1–52.
| Taxon identifiers | |
|---|---|
| Calculus bicolor | |
| Calculus | |