Chamalycaeus specus (Godwin-Austen, 1889)
Alycaeus specus Godwin-Austen, 1889: 347, pl. 37, figs 4, 4a.
Alycaeus (Alycaeus) specus - Kobelt 1902: 351.
Type locality.
"In limestone caves at Jambusan".
Material examined.
Caves, Borneo, leg. A. Everett, coll. Godwin-Austen, NHMUK 1889.12.7.26 (1 syntype).
Remarks.
The syntype is weathered and was glued to a piece of black paper by its R2 area, therefore limited information could be gained during its examination. The shell is depressed and conical; protoconch strongly weathered, but there were no signs of spiral striation near the suture; R1 regularly and strongly ribbed with very weak spiral striation; length of R2 could not be fully seen, but has low, dense riblets and fine spiral lines. We received photographs and good quality drawings of newly collected shells from Thor-Seng Liew and Jaap Vermeulen (pers. comm. August 2019), and those confirmed that this species is a Chamalycaeus due to the colourless shell, long R2, and relatively strong ribs.