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Thwaitesia
T. affinis, female
Thwaitesia sp. from the NSW Central Coast
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Chelicerata
Class:	Arachnida
Order:	Araneae
Infraorder:	Araneomorphae
Family:	Theridiidae
Genus:	Thwaitesia O. Pickard-Cambridge, 1881
Type species
T. margaritifera O. Pickard-Cambridge, 1881
Species
23, see text
Synonyms
Topo Exline, 1950

Thwaitesia is a genus of comb-footed spiders that was first described by Octavius Pickard-Cambridge in 1881.

T. affinis females are 4.6 millimetres (0.18 in) long, and males are 2.7 millimetres (0.11 in) long. T. bracteata are about the same size. They are similar in appearance to members of both Spintharus and Episinus.

Species

As of June 2020 it contains twenty-three species, found in the tropics worldwide:

• Thwaitesia affinis O. Pickard-Cambridge, 1882 – Panama to Paraguay
• Thwaitesia algerica Simon, 1895 – Algeria
• Thwaitesia argentata Thorell, 1890 – Indonesia (Sumatra)
• Thwaitesia argenteoguttata (Tullgren, 1910) – Kenya, Tanzania
• Thwaitesia argenteosquamata (Lenz, 1891) – Madagascar
• Thwaitesia argentiopunctata (Rainbow, 1916) – Australia (Queensland)
• Thwaitesia aureosignata (Lenz, 1891) – Madagascar
• Thwaitesia bracteata (Exline, 1950) – Trinidad, Colombia to Paraguay
• Thwaitesia dangensis Patel & Patel, 1972 – India
• Thwaitesia glabicauda Zhu, 1998 – China
• Thwaitesia inaurata (Vinson, 1863) – Réunion
• Thwaitesia margaritifera O. Pickard-Cambridge, 1881 (type) – India, Sri Lanka, China, Vietnam
• Thwaitesia meruensis (Tullgren, 1910) – Tanzania
• Thwaitesia nigrimaculata Song, Zhang & Zhu, 2006 – China
• Thwaitesia nigronodosa (Rainbow, 1912) – Australia (Queensland)
• Thwaitesia phoenicolegna Thorell, 1895 – Myanmar, Vietnam
• Thwaitesia pulcherrima Butler, 1883 – Madagascar
• Thwaitesia rhomboidalis Simon, 1903 – Equatorial Guinea
• Thwaitesia scintillans Kulczyński, 1911 – New Guinea
• Thwaitesia simoni (Keyserling, 1884) – Brazil
• Thwaitesia spinicauda Thorell, 1895 – Myanmar
• Thwaitesia splendida Keyserling, 1884 – Panama to Venezuela
• Thwaitesia turbinata Simon, 1903 – Sierra Leone

Formerly included:

• T. argyrodiformis (Yaginuma, 1952) (Transferred to Chrysso)

Nomen dubium

• T. conifera (Blackwall, 1862)

See also

• List of Theridiidae species

References

1. ^ Gloor, Daniel; Nentwig, Wolfgang; Blick, Theo; Kropf, Christian (2020). "Gen. Thwaitesia O. Pickard-Cambridge, 1881". World Spider Catalog Version 20.0. Natural History Museum Bern. doi:10.24436/2. Retrieved 2020-07-14.
2. Levi, H. W.; Levi, L. R. (1962). "The genera of the spider family Theridiidae". Bulletin of the Museum of Comparative Zoology. 127: 31.
3. Pickard-Cambridge, O. (1881). "On some new genera and species of Araneidea". Proceedings of the Zoological Society of London. 49 (3): 765–775. doi:10.1111/j.1096-3642.1881.tb01333.x.

Further reading

• Levi, H. W. (1963). "The American spider genera Spintharus and Thwaitesia" (PDF). Psyche: A Journal of Entomology. 70 (4): 223–234. doi:10.1155/1963/54690. Archived from the original (PDF) on 2007-09-27.
• Simon, E (1894). Histoire naturelle des araignées (in French). Paris: Roret. doi:10.5962/bhl.title.51973.
• Keyserling, E. (1884). Die Spinnen Amerikas II. Theridiidae. Bauer & Raspe, Nürnberg. pp. 1–222. doi:10.5962/bhl.title.64832.
• Zhu, M. S.; Zhang, B. S. (2011). Spider Fauna of Henan: Arachnida: Araneae. Science Press, Beijing, xxii+ pp. p. 558.

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