	Home \| About \| Database \| Mussel of the Month \| Publications & Presentations

MUSSELpdb

Taxonomy

Margaritiferidae

Species & Genus Richness by
Taxonomy

Geography

Central America

Species Richness & Endemism by
Geography

Data last updated
Mon 1 Dec 2025

Bivalvia | Unionoida | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina

genus Pegias Simpson, 1900: synonymy

1 Recent freshwater species (1 total species)

Synonymy

Pegias Simpson, 1900

Simpson, 1900. Proc. U.S. Nat. Mus. 22: 660.
Simpson, 1914. Descr. Cat. Naiades: 472.
Type species: Margaritana fabula Lea, 1838 (orig. desig.) = Pegias fabula

Pagias Ortmann, 1921

Ortmann, 1921. Nautilus 34: 88.
(error for Pegias Simpson, 1900)
Type species: Margaritana fabula Lea, 1838 = Pegias fabula

Taxonomic History (since 1900)

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

Pegias — Simpson (1900), Simpson (1914), Ortmann (1918), Ortmann (1924), Ortmann (1925), ... Klymus et al. (2020), Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025)
Alasmidonta (Pegias) — Ortmann (1914), Haas (1969), Burch (1975)
Unio — de Gregorio (1914)
Alasmodonta (sec. Pegias) — Thiele (1934)

"Making the world a better place, one mollusk at a time."
	The MUSSEL Project — Home Page https://musselpdb.org/. Site developed and maintained by Dan Graf & Kevin Cummings. Funded by The National Science Foundation.