Sarika diadema (Dall, 1897)
“This elegantly sculptured species seems to differ much from any yet described. Its nearest relatives are M. compluvialis Blanf., and M. convalata Benson, which have a channelled suture, but do not have the transverse sculpture cutting the crest of the enclosing whorls.” (Dall, 1897)
Dall (1897) original descriptions on Nanina (Macrochlamys?) diadema – “Shell translucent yellow-brown, polished, depressed, with six and a half whorls, of which the apical two and a half are pale and smooth, the remainder show a deeply channeled suture outside of which the whorl rises abruptly, its rounded crest cut into rounded nodules like the joints of a millipede by deeply incised lines in harmony with the lines of growth; there are about 38 of these divisions on the last whorl; the incisions override the crest and extend nearly to the periphery, becoming gradually fainter; periphery and base marked only by incremental lines, rounded, with a minute perforate umbilicus, over which a small portion of the inner lip is bent; peristome thin, sharp, the body showing hardly any callus.”
Nanina (Macrochlamys?) diadema – “max. diam.16, min. diam. 13, alt. 10 mm.” (Dall, 1897)
Type locality – “Prang, on the Malay Peninsula.” Leg. W. L. Abbott (Dall, 1897)