Bivalvia | ... | Unionoidea | Unionidae | Gonideinae | Rectidentini | Contradentina | Lens
30 specimens + 4 GenBank vouchers

Sowerby, 1867. Conch. Icon. 17: pl. 8, sp. 18, fig. 17.
Type(s): HOLOTYPE BMNH_1965193, Siam.
Trapezoideus pallegoixi — Simpson (1900), Preston (1912), Simpson (1914)
Trapezoideus misellus — Haas (1919), Haas (1969)
Trapezoideus exolescens pallegoixi — Brandt (1974)
Trapezoideus exolescens — He & Zhuang (2013)
Contradens pallegoixi — Konopleva et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020), Graf & Cummings (2021)
Lens pallegoixi — Pfeiffer et al. (2021), Bolotov et al. (2022), Konopleva et al. (2023), Zieritz et al. (2024), Campbell & Lydeard (2026), Zieritz et al. (2026)
Trapezoideus pallegoixi — Simpson (1900), Preston (1912), Simpson (1914)
Trapezoideus misellus — Haas (1919), Haas (1969)
Trapezoideus exolescens pallegoixi — Brandt (1974)
Trapezoideus exolescens — He & Zhuang (2013)
Contradens pallegoixi — Konopleva et al. (2019), Konopleva et al. (2019), Bolotov et al. (2020), Zieritz et al. (2020), Graf & Cummings (2021)
Lens pallegoixi — Pfeiffer et al. (2021), Bolotov et al. (2022), Konopleva et al. (2023), Zieritz et al. (2024), Campbell & Lydeard (2026), Zieritz et al. (2026)