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Homalonychus sp. (Marshal Hedin).jpg
Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Homalonychidae
Genus: Homalonychus
Marx, 1891[1]
Type species
H. selenopoides Marx, 1891

Homalonychus is a genus of araneomorph spiders, and is the only genus in the family Homalonychidae. It was first described by George Marx in 1891.[2] As of May 2019 it contains only three species: H. raghavai, H. selenopoides, and H. theologus.[1] Two are found in the southern United States and Mexico: H. theologus is mostly found west of the Colorado River, while H. selenopoides is mostly found to the east, with some populations in Death Valley and near Mercury, Nevada.[3]

They do not build webs, and are typically found under rocks or dead vegetation. At least the two North American species live in deserts, to which they are adapted by color and specialized setae which allow them to attach sand and fine soil to themselves. They also partially bury themselves.[4]

In 1991 a single female was described in India,[5] but it is likely misplaced in this genus.[1]


  1. ^ a b c Gloor, Daniel; Nentwig, Wolfgang; Blick, Theo; Kropf, Christian (2019). "Gen. Homalonychus Marx, 1891". World Spider Catalog Version 20.0. Natural History Museum Bern. doi:10.24436/2. Retrieved 2019-06-11.
  2. ^ Marx, G. (1891). "A contribution to the knowledge of North American spiders". Proceedings of the Entomological Society of Washington. 2: 28–37.
  3. ^ "Genus Homalonychus". BugGuide. Retrieved 2019-06-11.
  4. ^ Crews, Sarah C. (2006-09-10). "Homalonychus in the Desert Southwest". University of California, Berkeley. Retrieved 2019-06-11.
  5. ^ Patel, B. H.; Reddy, T. S. (1991). "A rare new species of Homalonychus Marx (Araneae: Homalonychidae) from coastal Andhra Pradesh, India". Records of the Zoological Survey of India. 89: 205.

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