Taxonomic History (since 2007)

Utterbackia imbecillis — Zanatta et al. (2007), Tiemann et al. (2007), Graf & Cummings (2007), Anonymous (2008), ..., Wu et al. (2024), Hou et al. (2024), Wu et al. (2024), Dai et al. (2025)
Anodonta imbecillis — ITIS (2012)
U. imbecillis — Marshall et al. (2018)

Mexico

USNM_86692
Matamoras, Mexico

USNM_903964
Rio Conchos, Saucillo, downstream from large cobble riffles, Chihuahua, Mexico

AMS_102107
canal, 20.5 mi WNW Anahuac, Nuevo Leon, Mexico

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

USNM_86692B
Matamoras, Mexico

USNM_25975
Matamoras, Mexico

USNM_7078
Esteros d’eau douce. Matamoras.

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_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

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

USA

UMMZ_209141
Sturgeon Bay, Wisc.

BMNH_196465
Comanche Creek, Texas

USNM_678301
Comanche Creek, [trib. of Pecos R., Pecos Co.], Texas

TMYERS_007
Lake Havasu, at Lake Havasu City, in a small cove off peninnsula into the Colorado River, Mohave Co., Arizona

USNM_25606
Ohio

USNM_892027
Bill Williams River, Bill Williams River National Wildlife Refuge, S of Cattail Marsh Near Lake Havasu, Mohave Co., Arizona, USA

TMYERS_001
Bill Williams River, Bill Williams River National Wildlife Refuge, S of Cattail Marsh Near Lake Havasu, La Paz Co., Arizona, USA

TMyers_0000 Mittry Lake, Yuma Co., Arizona, USA

unknown

SMF_4301
N. Amerika