MUSSELpdb

Taxonomy

all genera

Summary

Species & Genus Richness of
freshwater mussels
by Taxonomy

Species & Genus Richness of
freshwater bivalves
by Family

Geography

Species Richness & Endemism of
freshwater mussels
by Geography

Data last updated
Mon 2 March 2026

nominal species Unio exolescens Gould, 1843

Unio exolescens Gould, 1843 = Trapezidens exolescens

Gould, 1843. Proc. Boston Soc. Nat. Hist. 1: 141.
Type(s): LECTOTYPE USNM_85473 (by R.I. Johnson, 1964: 73), Tavoy, Burmah.

Taxonomic Opinions

= Trapezidens exolescens (Gould, 1843) — Dai et al., 2026: Table 1.

= Trapezidens exolescens (Gould, 1843) — Campbell & Lydeard, 2026: 292.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2024: Tables S2-S3.

= Trapezidens exolescens (Gould, 1843) — Dai et al., 2024: 1194, Table 1.

= Trapezidens exolescens — Dai et al., 2024: Table 2.

= Trapezidens exolescens (Gould, 1843) — Konopleva et al., 2023: Table S1.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2022: Table S1.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2022: 1495, Table S1.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2022: Dataset 1.

= Trapezidens exolescens (Gould, 1843) — Graf & Cummings, 2021: 24.

= Trapezidens exolescens (Gould, 1843) — Wu et al., 2021: attached Table 1.

= Trapezidens exolescens (Gould, 1843) — Konopleva et al., 2020: 53, fig. 3c.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2020: Table S1.

= Trapezidens exolescens (Gould, 1843) — Huang et al., 2019: Table S4.

= Trapezidens exolescens — Jeratthitikul et al., 2019: 25.

= Trapezoideus exolescens (Gould, 1843) — Zieritz et al., 2018: online Table 1.

= Trapezoideus exolescens (Gould, 1843) — Do et al., 2018: 12, Table 2.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2018: Table S1.

= Trapezoideus exolescens (Gould, 1843) — Lopes-Lima et al., 2017: 177.

= Lamellidens exolescens (Gould, 1843) — Bolotov et al., 2017: [3], Table S1.

= Trapezidens exolescens (Gould, 1843) — Bolotov et al., 2017: 7, Tables 3, S1.

= Lamellidens exolescens (Gould, 1843) — Konopleva et al., 2017: 204.

= Trapezoideus exolescens (Gould, 1843) — Pfeiffer & Graf, 2015: 310.

= Trapezoideus exolescens — Kongim et al., 2015: 98, fig. 2G.

= Trapezoideus exolescens (Gould, 1843) — Pfeiffer & Graf, 2013: 251.

= Trapezoideus exolescens (Gould, 1843) — He & Zhuang, 2013: 121, figs. 306-307.

= Trapezoideus exolescens Gould, 1843 — Bogan, 2010: [web].

= Trapezoideus exolescens (Gould, 1843) — IUCN, 2010: [web].

= Trapezoideus exolescens (Gould, 1843) — Graf & Cummings, 2007: 312.

= Trapezoideus exolescens exolescens (Gould, 1843) — Ramakrishna & Dey, 2007: 328, figs. 250a-b.

= Trapezoideus exolescens exolescens (Gould, 1843) — Deein et al., 2004: 55.

= Trapezoideus exolescens exolescens (Gould, 1843) — Subba Rao, 1989: 194, sp. 235, figs. 432-433, 548-557.

= Trapezoideus exolescens exolescens (Gould, 1843) — Brandt, 1974: 299, pl. 26, fig. 63.

+ Trapezoideus misellus (Morelet, 1865) — Haas, 1969: 76.

= Trapezoideus exolescens (Gould, 1843) — Prashad, 1922: 109.

= Trapezoideus exolescens (Gould, 1843) — Haas, 1919: 272.

= Trapezoideus exolescens (Gould, 1843) — Preston, 1915: 195.

= Trapezoideus exolescens (Gould, 1843) — Simpson, 1914: 1185.

= Trapezoideus exolescens (Gould) — Preston, 1912: 307.

= Trapezoideus exolescens (Gould, 1843) — Simpson, 1900: 859.

= Unio exolescens A. Gould — Martens, 1899: 42.

= Unio exsolescens [sic] Gould — Tapparone Canefri, 1889: 345.

= Unio exolescens Gould — Hanley & Theobald, 1874: 43, pl. 107, fig. 5.

= Margaron (Unio) exolescens (Gould) — Lea, 1870: 51.

= Unio (Niäa) exolescens Gould — Adams & Adams, 1857: 493.