MUSSELpdb

Introduction

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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
Mon 1 Dec 2025

Bivalvia | ... | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina | Simpsonaias

species Simpsonaias ambigua (Say, 1825): specimens

2 available nominal species synonyms (4 total synonyms)

Recent Taxonomic Opinions

Simpsonaias ambigua — Graf & Cummings (2007), Watters et al. (2009), Bogan (2010), Cummings & Graf (2010), ITIS (2012), ... Graf & Cummings (2021), FMCS (2021), Jeratthitikul et al. (2022), Hopper et al. (2023), FMCS (2025)
Simpsonais [sic] ambigua — Whelan et al. (2023)

Range

Wide but discontinuous distribution in the Interior and Great Lakes basins of eastern North America.

Map of Georeferenced Specimens

MUSSELp Specimen Records

USA

Genbank Vouchers

Georeferenced Genbank Vouchers

USA

NCSM_30607. (28S: KX822622, COI: KX822666, go to Genbank) USA.