Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Quadrulini | Quadrulina

genus Theliderma Swainson, 1840: synonymy

6 Recent freshwater species (6 total species)

Synonymy

Theliderma Swainson, 1840

(intro'd as sub-gen. of Unio Retzius, 1788; renamed Thelyderma Agassiz, 1846)
Swainson, 1840. Treat. Malacol.: 267-273, 275-276, 289-290, 378.
Type species: Obliquaria (Quadrula) metanevra Rafinesque, 1820 (sub. desig. by Gray, 1847: 196) = Theliderma metanevra

Thelyderma Agassiz, 1846

(new name for Theliderma Swainson, 1840)
Agassiz, 1846. Nomencl. Zool. Index Univ.: 368.
Type species: Obliquaria (Quadrula) metanevra Rafinesque, 1820 = Theliderma metanevra

Telederma Lea, 1852

(error for Theliderma Swainson, 1840)
‘Swainson’ of Authors.
Lea, 1852. Synopsis Fam. Naiades: 22.
Reeve, 1864. Conch. Icon. 16: pl. 7,sp. 25.
Lea, 1870. Synopsis Fam. Naiades: 33.
Paetel, 1875. Fam. Gatt. Moll.: 203.
Type species: Obliquaria (Quadrula) metanevra Rafinesque, 1820 = Theliderma metanevra

Orthonymus Agassiz, 1852

Agassiz, 1852. Arch. Naturg. 18(1): 48.
Type species: Unio cylindricus Say, 1817 (orig. desig.) = Theliderma cylindrica

Taxonomic History (since 1900)

The Taxonomic History lists the ways authors have classified the species currently assigned to Theliderma, since 1900.

Quadrula (s.s.) — Simpson (1900)
Unio (s.s.) — Call (1900)
Quadrula — Ortmann (1909), Ortmann (1909), Ortmann (1910), Ortmann (1910), Ortmann (1912), ... IUCN (2012), McMurray et al. (2012), Jones (2015), Inoue et al. (2018), Klymus et al. (2020)
Quadrula (s.s.) (Group of Q. metanevra) — Simpson (1914)
Unio — de Gregorio (1914)
Quadrula (Orthonymus) — Frierson (1927), Haas (1930), Haas (1969)
Quadrula (sec. Orthonymus) — F.C. Baker (1928)
Quadrula (sec. Theliderma) — Thiele (1934)
Orthonymus — Morrison (1966), Haas (1969)
Theliderma — Morrison (1966), IUCN (1996), IUCN (2000), Graf & Cummings (2007), Cummings & Graf (2010), ... FMCS (2021), Neemuchwala et al. (2023), Hopper et al. (2023), FMCS (2025), Campbell & Lydeard (2026)