Dicharax diagonius (Godwin-Austen, 1871)
Alycaeus diagonius Godwin-Austen, 1871: 88-89, pl. 3, fig. 2.
Alycaeus diagonus [sic] - Reeve 1878: pl. 1, species 2.
Alycaeus (Dicharax) diagonius - Kobelt 1902: 368-369; Gude 1921: 247-248.
Alycaeus diagonius - Godwin-Austen 1914: 389-390, pl. 143, figs 5, 5a, 5b.
Chamalycaeus (Dicharax) diagonius - Ramakrishna et al. 2010: 58.
Type locality.
"The Diyung valley, north of Asálú , in Cachar District".
Material examined.
Diyung valley, N. of Asalu, N. Cachar, coll. Godwin-Austen, NHMUK 1903.7.1.2678 (10 syntypes).
Remarks.
Protoconch low, no spiral lines visible; R1 also without spiral lines, its sculpture is similar to that of the protoconch; R2 short, with regular ribs curved towards the aperture.