Morphology:
W. &. H. Blanford (1860) original descriptions on Opisthostoma nilgirica – “Testa minima, truncate pupiformis, anguste umbilicata; spira irregulari, apice obtusa, oblique, sutura profunda; costulata, interspatiis minutissime decussatis, albida, translucens. Anfractus rotundatim 5, quorum duo primi obliquiter contorti; ultimus constrictus, deinde inflatus, refractus, ascendens, denique sinistrorsus, anfractum penultimum contingens. Apertura subobliqua, superne versata, orbicularis. Peristoma continuum, incrassatum, duplicatum.”
Size:
Opisthostoma nilgirica – “Diam. Maj. 1.3 mm, Alt. 1.1 mm.” (W. H. Blanford, 1860)
Distribution:
Type locality – “Pykara ad summos montes “Nilgiri” inter folia aduca humida sylvarum” (W. & H. Blanford, 1860)
Taxonomic name: