MUSSELpdb

Introduction

Browse

d'basing

Taxonomy

all genera

Unionidae

Margaritiferidae

Hyriidae

Etheriidae

Mycetopodidae

Iridinidae

Species & Genus Richness by
Taxonomy

Geography

Summary

North America

Central America

South America

Afrotropics

North Eurasia

East Asia

Australasia

Species Richness & Endemism by
Geography

Data last updated
Thu 18 Dec 2025

Bivalvia | Unionoida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Pachynaias Crosse & Fischer, 1894: synonymy

1 Recent freshwater species (1 total species)

Synonymy

Taxonomic History (since 1900)

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

Quadrula (sec. Pachynaias) — Simpson (1900), Simpson (1914)
Unio (Pleurobema) — Martens (1900)
Unio (Elliptio) — Martens (1900)
Nephronaias — Ihering (1901)
Plagiola (Arotonaias) — Simpson (1914)
Elliptio (Pachynaias) — Frierson (1927)
Elliptio (Barynaias) — Frierson (1927), Haas (1929)
Pachynaias — Haas (1929), Thiele (1934), Haas (1969), Haas (1969), Graf & Cummings (2007), ... Smith et al. (2020), Graf & Cummings (2021), Czaja et al. (2023), Freeman et al. (2025), Cummings et al. (2025)
Barynaias — Haas (1969)
Pavhynaias [sic] — Contreras-Arquieta (2000)