Nilssonia hurum (Gray 1830:18)

Holotype: BMNH, apparently lost; type figured in Gray (1835; Pl. 66), and reproduced in Webb (1980:65) and Plate 66 designated “ type ” by Webb (1980:65).

Trionyx ocellatus Gray 1830:Pl. 78

Syntypes (number uncertain): BMNH, but apparently lost; specimen figured in the original description (Pl. 78) designated as “type” by Webb (1980:63) .

Trionyx sewaare Gray 1872:336

Syntypes (apparently 2): BMNH 1973.1051–52; specimen illustrated in Hardwicke (1835:Pl. 36) designated “type” by Webb (1980:67).

Trionyx bellii Gray 1872:337

Holotype: Not located; possibly OUM.

Trionyx buchanani Theobald 1874:78

Holotype: ZSI 1090 (Das et al. 1998:128; Kundu et al. 2018:24, photographed therein, p. 26).

Trionyx hurum sivalensis t Lydekker 1889:9

Holotype: ZSI E.163; illustrated in Lydekker (1885: Pl. XXVII, Fig. 3). NHM(P) R601 is a cast of the holotype.