species Gonidea angulata (Lea, 1838): synonymy

Anodonta angulata Lea, 1838

Lea, 1838. Trans. Amer. Phil. Soc. 6 [O. 2]: 97, pl. 16, fig. 52.
Type(s): HOLOTYPE (MONOTYPY) USNM_86759, Lewis R., Ore.

Gonidea angulata — Simpson (1900), Hannibal (1912), Simpson (1914), Frierson (1927), Thiele (1934), ... Jeratthitikul et al. (2025), Dai et al. (2025), FMCS (2025), Chen et al. (2025), Campbell & Lydeard (2026)

Anodon feminalis Gould, 1850

Gould, 1850. Proc. Boston Soc. Nat. Hist. 3: 293.
Gould, 1852. U.S. Explor. Exped. 12: 436, figs. 547-547b.
Type(s): HOLOTYPE USNM_5932, Oregon.

Gonidea angulata — Simpson (1900), Hannibal (1912), Simpson (1914), Frierson (1927), Haas (1969), Burch (1975), IUCN (2016)

Anodonta randalli Trask, 1854

Trask, 1854. Proc. Calif. Acad. Sci. 1: 28.

Gonidea angulata — Simpson (1900), Hannibal (1912), Simpson (1914), Frierson (1927), Haas (1969), Haas (1969), Burch (1975), IUCN (2016), Lopes-Lima et al. (2017), Graf & Cummings (2021), Lopes-Lima et al. (2021)

Anodon biangulata Sowerby, 1869

Sowerby, 1869. Conch. Icon. 17: pl. 23, sp. 88, figs. 88a-b.

Gonidea angulata — Simpson (1900), Hannibal (1912), Simpson (1914), Frierson (1927), Haas (1969), Burch (1975), IUCN (2016)

Anodonta angulata var. subangulata Hemphill, 1891

Hemphill, 1891. Zoe 1(11): 325, pl. 10, figs. 1-2.
(intro'd as intra-sp. of Anodonta angulata Lea, 1838)

Gonidea angulata haroldiana — Hannibal (1912)
Gonidea angulata var. subangulata — Simpson (1914)
Gonidea angulata-subangulata — Frierson (1927)
Gonidea angulata — Haas (1969)

Margaritana subangulata Cooper, 1894

Cooper, 1894. Proc. Calif. Acad. Sci. 4: 166.
(homonym of Anodonta angulata var. subangulata Hemphill, 1891)

Gonidea (Limnobasilissa) angulata subangulata — Hannibal (1912)
Gonidea coalingensis cooperi — Henderson (1935)
Gonidea coalingensis — Modell (1957)

Gonidea angulata var. haroldiana Dall, 1908

Dall, 1908. Smithsonian Misc. Coll. 50: 499.
(intro'd as intra-sp. of Anodonta angulata Lea, 1838)
Type(s): HOLOTYPE USNM_110596A, Hannibal Ranch, near San Jose, California.

Gonidea angulata haroldiana — Hannibal (1912)
Gonidea angulata var. subangulata — Simpson (1914)
Gonidea angulata var. haroldiana — Ortmann (1916)
Gonidea angulata-haroldiana — Frierson (1927)
Gonidea angulata — Haas (1969)

Gonidea coalingensis Arnold, 1909

Arnold, 1909. Bull. U.S. Geol. Surv. 396: 47, pl. 30, fig. 11.

Gonidea (Limnobasilissa) angulata subangulata — Hannibal (1912)
Gonidea coalingensis coalingensis — Henderson (1935)
Gonidea coalingensis — Modell (1957)

Gonidea coalingensis cooperi Arnold, 1909

Arnold, 1909. Bull. U.S. Geol. Surv. 396: 48.
(intro'd as intra-sp. of Gonidea coalingensis Arnold, 1909)

Gonidea (Limnobasilissa) angulata subangulata — Hannibal (1912)
Gonidea coalingensis cooperi — Henderson (1935)
Gonidea coalingensis — Modell (1957)

Anodon randalii Conrad, 1857

‘Trask’ Conrad, 1857. Proc. Acad. Nat. Sci. 9: 165.
‘Trask’ Lopes-Lima et al., 2020. MPE 146: Appendix 1.
(error for Anodonta randalli Trask, 1854)