species Yaukthwa zayleymanensis (Preston, 1912): synonymy

Trapezoideus foliaceus var. zayleymanensis Preston, 1912

(intro'd as intra-sp. of Unio foliaceus Gould, 1843)
‘Nevill, MS’ Preston, 1912. Rec. Ind. Mus. 7: 307.
‘Nevill MS’ Preston, 1915. Fauna Brit. India: 194.
Type(s): SYNTYPE SMF_3615, Zayleyman, Ob. Birma.

Trapezoideus foliaceus var. zayleymanensis — Preston (1912), Simpson (1914), Preston (1915)
Trapezoideus misellus — Haas (1919), Prashad (1922), Haas (1969)
Trapezoideus exolescens exolescens — Brandt (1974), Subba Rao (1989), Ramakrishna & Dey (2007)
Trapezoideus exolescens — He & Zhuang (2013)
Trapezoideus subclathratus — Bolotov et al. (2017)
Yaukthwa zayleymanensis — Konopleva et al. (2019), Bolotov et al. (2020), Pfeiffer et al. (2021), Graf & Cummings (2021), Bolotov et al. (2022), Campbell & Lydeard (2026)

Unio foliaceus Tapparone Canefri, 1889

(misidentified reference to Unio foliaceus Gould, 1843)
‘Gould’ Tapparone Canefri, 1889. Ann. Mus. Storia Nat. Genova 27: 345.

Yaukthwa zayleymanensis — Bolotov et al. (2022)

Trapezoideus zayleiwanensis Haas, 1912

(error for Trapezoideus foliaceus var. zayleymanensis Preston, 1912)
‘Preston’ Haas, 1912. Conch. Cab. 9 (pt. 2, h. 46): pl. 33, fig. 1.

Trapezoideus foliaceus var. zayleymanensis — Simpson (1914)

Trapezoideus zayleimanensis Haas, 1919

(error for Trapezoideus foliaceus var. zayleymanensis Preston, 1912)
‘Preston’ Haas, 1919. Conch. Cab. 9 (pt. 2, h. 51): 267.
‘Preston’ Haas, 1969. Das Tierreich 88: 76.

Trapezoideus foliaceus var. zaleymanensis Prashad, 1922

(error for Trapezoideus foliaceus var. zayleymanensis Preston, 1912)
‘Preston’ Prashad, 1922. Rec. Ind. Mus. 24: 110.