Tandayarachne

Tandayarachne
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Mygalomorphae
Family:	Theraphosidae
Genus:	Tandayarachne; Peñaherrera-R. & Guayasamin, 2025
Type species
	T. sherwoodae; Peñaherrera-R. & Guayasamin, 2025
Species
	2, see text

Tandayarachne is a genus of spiders in the family Theraphosidae.²

Distribution

Tandayarachne is found in Colombia and Ecuador.²

Etymology

The genus name is a combination of Tandayapa Cloud Forest Station, the type location in the Alambi river basin in Pichincha Province, Ecuador, and Ancient Greek arachne "spider". T. sherwoodae honors UK arachnologist Danniella Sherwood.¹

Species

As of January 2026, this genus includes two species:²

Tandayarachne pijaos (Jimenez & Bertani, 2008) – Colombia
Tandayarachne sherwoodae Peñaherrera-R. & Guayasamin, 2025 – Ecuador

References

Peñaherrera-R., P.; Guayasamin, J. M. (2025). "Between cloud forests and museums: testing tarantula (Araneae: Theraphosidae) generic boundaries reveals a new montane genus from Ecuador and Colombia". Zoological Journal of the Linnean Society. 205: 1–24. doi:10.1093/zoolinnean/zlaf152.
"Gen. Tandayarachne Peñaherrera-R. & Guayasamin, 2025". World Spider Catalog. Retrieved 2026-01-22.

[penaherrerar2025-1] Peñaherrera-R., P.; Guayasamin, J. M. (2025). "Between cloud forests and museums: testing tarantula (Araneae: Theraphosidae) generic boundaries reveals a new montane genus from Ecuador and Colombia". Zoological Journal of the Linnean Society. 205: 1–24. doi:10.1093/zoolinnean/zlaf152.

[wsc-2] "Gen. Tandayarachne Peñaherrera-R. & Guayasamin, 2025". World Spider Catalog. Retrieved 2026-01-22.

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