Therobatinae

Therobatinae can be distinguished from Eremobatinae by the structure of the flagellum on the male chelicera: Therobatinae possess a dorsal row of setae on the flagellum, whereas Eremobatinae lack this feature. Additional diagnostic characters include the shape and dentition of the cheliceral fingers and specific arrangements of spines on the pedipalps. These features require microscopic examination for reliable identification.

Arid and semi-arid environments including deserts, scrublands, and dry grasslands. Species are found in sandy, rocky, and gravelly substrates. Many occupy rodent burrows, rock crevices, or self-constructed temporary shelters under surface debris.

North America, primarily the western United States and northern Mexico. Range extends from the Pacific Coast eastward to the Great Plains, and from southern Canada through the Mojave, Sonoran, and Chihuahuan deserts.

Activity peaks during warmer months (spring through fall), with most species becoming dormant or less active during winter. Nocturnal surface activity increases following summer rains.

Predators of small arthropods in desert ecosystems. May contribute to soil turnover through burrowing activities.

• EremobatinaeThe other subfamily of Eremobatidae; distinguished by absence of dorsal flagellar setae and differences in cheliceral morphology.

• BugGuide
• iNaturalist taxon
• Catalogue of Life