Bivalvia | ... | Unionoidea | Unionidae | Gonideinae | Rectidentini | Contradentina | Trapezoideus
46 specimens + 46 GenBank vouchers

Gould, 1843. Proc. Boston Soc. Nat. Hist. 1: 141.
Type(s): LECTOTYPE USNM_84161, Tavoy, Burmah.
Trapezoideus foliaceus — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915), Haas (1919), ... Liu et al. (2024), Zieritz et al. (2024), Wu et al. (2024), Jeratthitikul et al. (2024), Campbell & Lydeard (2026)
Trapezoideus exolescens exolescens — Brandt (1974), Subba Rao (1989), Ramakrishna & Dey (2007)
Trapezoideus exolescens — Graf & Cummings (2007), IUCN (2010), He & Zhuang (2013)
Trapezoideus foliaceus — Simpson (1900), Preston (1912), Simpson (1914), Preston (1915), Haas (1919), ... Liu et al. (2024), Zieritz et al. (2024), Wu et al. (2024), Jeratthitikul et al. (2024), Campbell & Lydeard (2026)
Trapezoideus exolescens exolescens — Brandt (1974), Subba Rao (1989), Ramakrishna & Dey (2007)
Trapezoideus exolescens — Graf & Cummings (2007), IUCN (2010), He & Zhuang (2013)