species Trapezidens exolescens (Gould, 1843): synonymy

Unio exolescens Gould, 1843

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

Trapezoideus exolescens — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915), Haas (1919), ... IUCN (2010), He & Zhuang (2013), Kongim et al. (2015), Zieritz et al. (2018), Do et al. (2018)
Trapezoideus misellus — Haas (1969)
“Trapezoideus exolescens exolescens” ** — Brandt (1974)
Trapezoideus exolescens exolescens — Subba Rao (1989), Deein et al. (2004), Ramakrishna & Dey (2007)
“Trapezoideus exolescens” ** — Pfeiffer & Graf (2013), Pfeiffer & Graf (2015), Lopes-Lima et al. (2017)
Lamellidens exolescens — Bolotov et al. (2017), Konopleva et al. (2017)
Trapezidens exolescens — Bolotov et al. (2017), Bolotov et al. (2018), Huang et al. (2019), Jeratthitikul et al. (2019), Konopleva et al. (2020), ... Bolotov et al. (2024), Dai et al. (2024), Dai et al. (2024), Dai et al. (2026), Campbell & Lydeard (2026)

Unio fragilis Nevill, 1877

(homonym of Unio (Leptodea) fragilis Rafinesque, 1820)
Nevill, 1877. J. Asiat. Soc. Bengal 46: 39.

Trapezoideus foliaceus var. comptus — Simpson (1900), Simpson (1914), Preston (1915)
Trapezoideus misellus — Haas (1919), Haas (1969)
Trapezoideus exolescens — Prashad (1922), He & Zhuang (2013)
Trapezoideus exolescens pallegoixi — Brandt (1974)

Unio exolescens Hanley & Theobald, 1874

(reference to Unio exolescens Gould, 1843)
‘Gould’ Hanley & Theobald, 1874. Conch. Indica (6): 43, pl. 107, fig. 5.

Trapezoideus exolescens — Simpson (1900), Preston (1915)
Trapezoideus misellus — Haas (1919)

Unio exolesceus Ramakrishna & Dey, 2007

(error for Unio exolescens Gould, 1843)
‘Gould’ Ramakrishna & Dey, 2007. Handb. Indian Freshw. Moll.: 328.