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.[2] 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.[3]
| Calculus bicolor | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Araneomorphae |
| Family: | Orsolobidae |
| Genus: | Calculus Purcell, 1910[1] |
| Species: | C. bicolor
|
| Binomial name | |
| Calculus bicolor Purcell, 1910[1]
| |
References
edit- ^ a b "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.