Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Quadrulini | Megalonaias

species Megalonaias nervosa (Rafinesque, 1820): specimens

7 available nominal species synonyms (14 total synonyms)

Recent Taxonomic Opinions

Megalonaias nervosa — Graf & Cummings (2007), Tiemann et al. (2007), Williams et al. (2008), Watters et al. (2009), Bogan (2010), ... Hopper et al. (2023), Hauck et al. (2023), Ma et al. (2024), FMCS (2025), Cummings et al. (2025)
Megalonaias boykiniana — Graf & Cummings (2007), Cummings & Graf (2010), ITIS (2012)
Megalonaias gigantea — ITIS (2012)
Tritogonia nervosa — ITIS (2012)
M. nervosa — Marshall et al. (2018)

Range

Widespread in the Interior Basin and Gulf Coastal Plain, including the Ochlochonee of Florida, USA south into Mexico.

Map of Georeferenced Specimens

specimens map of Megalonaias nervosa

MUSSELp Specimen Records

Guatemala

image of lot UF_507902
UF_507902
Rio De La Pasion, 5.5 miles east of Sayaxche, El Peten Department, Guatemala 16.536339, -90.103900

image of lot USNM_783054
USNM_783054
Rio de la Pasion, Guatemala

image of lot USNM_783053
USNM_783053
Rio de la Pasion, Guatemala

image of lot USNM_783064
USNM_783064
Rio de la Pasion, Guatemala

image of lot USNM_783056
USNM_783056
Rio de la Pasion, Guatemala

Mexico

image of lot UF_270395
UF_270395
Nuevo Leon, Mexico

image of lot INHS_89425
INHS_89425
Rio Tempoal, Tempoal, Veracruz, Mexico

image of lot USNM_83991
USNM_83991
Sabinas R., Nuevo Leon, Mexico

image of lot USNM_83991
USNM_83991
Sabinas R., Nuevo Leon, Mexico

image of lot USNM_83991
USNM_83991
Sabinas R., Nuevo Leon, Mexico

image of lot USNM_123293
USNM_123293
Vera Cruz, Mexico

image of lot UF_270398
UF_270398
Veracruz, Mexico

USA

image of lot USNM_83903
USNM_83903
Columbus, Georgia

image of lot USNM_150554
USNM_150554
Coosa Riv., St. Clair Co., Ala.

USNM_709225. United States, New Mexico, Eddy County, Pecos River, below McMillan Reservoir Dam

USNM_592725. United States, New Mexico, Eddy County, Pecos River, Malaga Bend

Genbank Vouchers

Georeferenced Genbank Vouchers

USA

UAUC_266. (COI: AY655007, ND1: AY158794, go to Genbank) Coosa River, near Leesburg, downstream from mouth of Terrapin Ck., Cherokee Co., AL.

UF_438512. (16S: MK001793, 28S: MK001827, COI: MF960144, go to Genbank) USA, Florida, Santa Rosa County, Escambia River, about 0.3 mi above Chumuckla Springs boat ramp (30.82597, -87.29701).

UF_439113 (MnerOhi057). (5.8S: MH362616, COI: MH633645, ITS1: MH362616, ND1: MH633597, go to Genbank) USA, Ohio, Wood County, Ohio River, Buckley Island backchannel (39.391231, -81.420944).

UF_438300 (MnerGua025). (5.8S: MH362471, COI: MH633619, ITS1: MH362471, ND1: MH633571, go to Genbank) USA, Texas, Guadalupe County, Lake Wood State Park - Guadalupe River - just below Lake Wood Dam ~80 m below spillway (29.46975, -97.49062).

JBFMC_12095_1. (16S: PQ238847, go to Genbank) USA: Texas, Red River.