MUSSELpdb

Taxonomy

Margaritiferidae

Species & Genus Richness of
freshwater mussels
by Taxonomy

Species & Genus Richness of
freshwater bivalves
by Family

Geography

Central America

Species Richness & Endemism of
freshwater mussels
by Geography

Data last updated
Sun 12 April 2026

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

species Utterbackia imbecillis (Say, 1829): specimens

6 available nominal species synonyms (11 total synonyms)

Recent Taxonomic Opinions

Utterbackia imbecillis — Graf & Cummings (2007), Zanatta et al. (2007), Tiemann et al. (2007), Williams et al. (2008), Anonymous (2008), ... Cummings et al. (2025), Hou et al. (2025), Wang et al. (2025), Campbell & Lydeard (2026), Wu et al. (2026)
Anodonta imbecillis — ITIS (2012)
U. imbecillis — Marshall et al. (2018)

Range

Widespread in the Interior, Great Lakes, Gulf Coastal, and Atlantic slope basins, North America. Introduced to peninsular Florida and Mexico. (North America: NA2 NA3 NA4 Central America: CA1)

Map of Georeferenced Specimens

specimens map of Utterbackia imbecillis

MUSSELp Specimen Records

Mexico

AMS_102107 canal, 20.5 mi WNW Anahuac, Nuevo Leon, Mexico	USNM_7078 Esteros d’eau douce. Matamoras.	UF_41350 lake in the middele of a pasture, 1.6 mi SW Agualeguas, Nuevo Leon, Mexico
UF_41351 lake in the middele of a pasture, 1.6 mi SW Agualeguas, Nuevo Leon, Mexico	USNM_86692 Matamoras, Mexico	USNM_86692B Matamoras, Mexico
USNM_25975 Matamoras, Mexico	USNM_1282735 Mexico: Coahuila. Rio Salado de Nadadores, 0.5 mi S Progresso on road to HW 57 [distance from HW 57 is 14.6 mi]	USNM_903964 Rio Conchos, Saucillo, downstream from large cobble riffles, Chihuahua, Mexico
USNM_1282737 Tamaulipas, Rio Carrizal at Rt. Mex. 180 in Nuevo Progreso, ca. 20.8 mi N of road divergence (on Rt. Mex. 180) to Aldma and Est. Manuel	USNM_1282739 Veracruz, Rio Papaloapan off road from Ciudad Aleman to Tuxtepec; ca. 0.5 roadmiles by dirt road to river; dirt road entrance to Aleman-Tuxtepec road is ca. 2.4 roadmiles W of divergence of roads to Ciudad Aleman and Cosamaloapan

unknown

SMF_4301
N. Amerika

USA

TMYERS_001 Bill Williams River, Bill Williams River National Wildlife Refuge, S of Cattail Marsh Near Lake Havasu, La Paz Co., Arizona, USA	USNM_892027 Bill Williams River, Bill Williams River National Wildlife Refuge, S of Cattail Marsh Near Lake Havasu, Mohave Co., Arizona, USA	USNM_892027 Bill Williams River, Bill Williams River National Wildlife Refuge, S of Cattail Marsh Near Lake Havasu, Mohave Co., Arizona, USA
USNM_678301 Comanche Creek, [trib. of Pecos R., Pecos Co.], Texas	BMNH_196465 Comanche Creek, Texas	TMYERS_007 Lake Havasu, at Lake Havasu City, in a small cove off peninnsula into the Colorado River, Mohave Co., Arizona
TMYERS_007 Lake Havasu, at Lake Havasu City, in a small cove off peninnsula into the Colorado River, Mohave Co., Arizona	USNM_25606 Ohio	UMMZ_209141 Sturgeon Bay, Wisc.

TMYERS_0000. Mittry Lake, Yuma Co., Arizona, USA

GenBank Vouchers

Georeferenced GenBank Vouchers

USA

UF_439469. (16S: PQ238813, go to GenBank) USA: Texas, Brazos River.

GenBank Vouchers Not Yet Georeferenced

ANSP_333563. (28S: U82333, go to GenBank)

MMTC_155. (ND1: GU085384, go to GenBank)

MMTC_156. (ND1: GU085385, go to GenBank)

UF_439473. (COI: OK562085, go to GenBank)