Page last updated
Wed 1 October 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 | Unionoida | Unionoidea | Unionidae | Ambleminae | Quadrulini | Uniomerus

species Uniomerus declivis (Say, 1831): specimens
     3 available nominal species synonyms (6 total synonyms)

Recent Taxonomic Opinions

Uniomerus declivis — Graf & Cummings (2007), Campbell et al. (2008), Watters et al. (2009), Bogan (2010), Cummings & Graf (2010), ... Graf & Cummings (2021), FMCS (2021), Neemuchwala et al. (2023), Hopper et al. (2023), FMCS (2025)
Uniomerus tetralasmus — Williams et al. (2008), IUCN (2012), Williams et al. (2014)
Uniomerus excultus — ITIS (2012)
Uniomerus declivus [sic] — Inoue et al. (2018), Burlakova et al. (2019)
U. declivis — Marshall et al. (2018)

Range

Gulf Coastal Plain from Alabama west to Texas, including the lower Mississippi.

Map of Georeferenced Specimens

USA

Georeferenced Genbank Vouchers

USA

UAUC_3290. (16S: AY655081, COI: AY613846, ITS1: DQ383435, ND1: JF326450, go to Genbank) Big Sunflower River, Farrell Rd. Bridge, ~ 5 mi N of Clarksdale, Coahoma Co. MS.

JBFMC_8586_2. (16S: PQ238821, SRA: SRR17818393, go to Genbank) USA: Texas, Red River.

UF_438312. (16S: MK001792, 28S: MK001826, 5.8S: KT285703, COI: KT285659, ITS1: KT285703, go to Genbank) USA:Texas:Newton County:Sabine River; Datum (WGS84) UTM 15R 0436930; 33926622; found in woody debris on right bank of river (30.665006, -93.658356).