# Usofila

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Genus of spiders

Usofila female U. flava U. pacifica Scientific classification Kingdom: Animalia Phylum: Arthropoda Subphylum: Chelicerata Class: Arachnida Order: Araneae Infraorder: Araneomorphae Family: Telemidae Genus: Usofila Keyserling, 1891[1] Type species U. gracilis Keyserling, 1891 Species 4, see text

***Usofila*** is a [genus](/source/Genus) of [American](/source/United_States) [long-legged cave spiders](/source/Telemidae) that was first described by [Eugen von Keyserling](/source/Eugen_von_Keyserling) in 1891.[2] Originally placed with the [Ochyroceratidae](/source/Ochyroceratidae), it was transferred to the [Telemidae](/source/Telemidae) in 1973.[3]

All species are found in the United States, with *U. pacifica* extending to Canada and Alaska.[1]

## Species

As of October 2025[\[update\]](https://en.wikipedia.org/w/index.php?title=Usofila&action=edit), this genus includes four species:[1]

- *[Usofila flava](https://en.wikipedia.org/w/index.php?title=Usofila_flava&action=edit&redlink=1)* [Chamberlin](/source/Ralph_Vary_Chamberlin) & Ivie, 1942 – [United States](/source/United_States)

- *[Usofila gracilis](https://en.wikipedia.org/w/index.php?title=Usofila_gracilis&action=edit&redlink=1)* [Keyserling](/source/Eugen_von_Keyserling), 1891 – United States (type species)

- *[Usofila oregona](https://en.wikipedia.org/w/index.php?title=Usofila_oregona&action=edit&redlink=1)* Chamberlin & Ivie, 1942 – United States

- *[Usofila pacifica](/source/Usofila_pacifica)* ([Banks](/source/Nathan_Banks), 1894) – [Alaska](/source/Alaska), [Canada](/source/Canada), United States

**Formerly included**

- *Usofila pecki* [Brignoli](/source/Paolo_Brignoli), 1980 = *[Telemofila pecki](/source/Telemofila)*

## See also

- *[Telema](/source/Telema)*

## References

1. ^ [***a***](#cite_ref-wsc_1-0) [***b***](#cite_ref-wsc_1-1) [***c***](#cite_ref-wsc_1-2) ["Gen. *Usofila* Keyserling, 1891"](https://wsc.nmbe.ch/genus/3229). World Spider Catalog. [doi](/source/Doi_(identifier)):[10.24436/2](https://doi.org/10.24436%2F2). Retrieved 2025-10-09.

1. **[^](#cite_ref-Keys1891_2-0)** [Keyserling, E.](/source/Eugen_von_Keyserling) (1891). *Die Spinnen Amerikas. Brasilianische Spinnen*. Nürnberg 3. pp. 1–278.

1. **[^](#cite_ref-Brig1973_3-0)** [Brignoli, P. M.](/source/Paolo_Brignoli) (1973). "I Telemidae, una famiglia di ragni nuova per il continente americano (Araneae)". *Fragmenta Entomologica*. **8**: 248.

## External links

- [Citizen science observations for Usofila](https://www.inaturalist.org/taxa/172210) at [iNaturalist](/source/INaturalist)

Taxon identifiers Usofila Wikidata: Q2234725 Wikispecies: Usofila ADW: Usofila BioLib: 465514 BOLD: 293589 BugGuide: 718566 CoL: 85FP EoL: 111656 GBIF: 5168812 iNaturalist: 172210 ITIS: 849633 NCBI: 571553 Open Tree of Life: 916482 WSC: urn:lsid:nmbe.ch:spidergen:00355

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Adapted from the Wikipedia article [Usofila](https://en.wikipedia.org/wiki/Usofila) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Usofila?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.