Dioryx pilula (Gould, 1859)
Alycaeus pilula Gould, 1859: 424-425.
Dioryx pilula and pilula var. minor - Kobelt and Möllendorff 1897: 147.
Alycaeus (Dioryx) pilula - Bavay and Dautzenberg 1900b: 456-457.
Dioryx pilula - Kobelt 1902: 339; Yen 1939: 28, pl. 2, fig. 29; Zilch 1957: 141; Varga 1972: 136, figs 19, 20; Páll-Gergely et al. 2017: 10.
Alcaeus [sic] pilula Johnson 1964: 127.
Type locality.
"Hong Kong, China".
Material examined.
Hong Kong, ex coll. Möllendorff , ex coll. Mus. Heude, MCZ 167223 (1 shell).
Remarks.
Protoconch extremely finely granulated, rather matte; R1 with irregular growth ridges and very fine spiral striation; R2 relatively short, with extremely fine alternating wider/darker and slimmer/lighter stripes.
Johnson (1964) did not find the type lot in the Smithsonian Museum. The sample we examined was collected at the type locality.