Page last updated
Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

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

species Utterbackiana heardi (Gordon & Hoeh, 1995): specimens
     2 available nominal species synonyms

Recent Taxonomic Opinions

Utterbackia heardi — Graf & Cummings (2007), Cummings & Graf (2010)
Anodonta heardi — Zanatta et al. (2007), Williams et al. (2008), Bogan (2010), Williams et al. (2011), ITIS (2012), Haag (2012), Williams et al. (2014), Smith et al. (2018)
Utterbackiana heardi — Williams et al. (2017), Graf & Cummings (2021), FMCS (2021), Whelan et al. (2023), Hopper et al. (2023), Perkins et al. (2025), FMCS (2025)

Range

Apalachicola and Ochlockonee rivers, Florida and Georgia, USA.

Map of Georeferenced Specimens

USA

UMMZ_253324. Apalachicola River, approximately 9.7 km north of Blountstown at Ocheesee Landing, Calhoun County, Florida.

Georeferenced Genbank Vouchers

USA

UF_441265.012. (5.8S: MG199876, COI: MG199622, ITS1: MG199876, go to Genbank) USA, Alabama, Henry County, Gin Branch embayment off Lake Eufaula or Walter F. George Reservoir (31.74566, -85.12909).

UF_438379.006. (18S: ON197379, 5.8S: ON197379, COI: ON157854, ITS1: ON197379, ND1: ON164867, go to Genbank) USA, Florida, Gulf/Liberty Cos., Apalachicola River at river mile 41.1 (30.12246, -85.14376).