Microcystina townsendiana Godwin Austen & Nevill, 1879
“A small and almost microscopic form, which I obtained by washing larger shells found by Dr. Townsend in the Buket Pondong Cave. It belongs to a group which appears to me to abound nearly everywhere in the Indo-Malay Province, but which has hitherto been almost universally neglected, on account of the small size, and absence of marked sculpture and coloration, which characterize these shells. Species have nevertheless been described by MM. Issel (from Borneo), Martens, Semper, and Mörch (Eastern Archipelago), Benson (India and Burma), Morelet and H. Adams (Mascarene I.), &c. I have not any books by me for reference; but I am almost confident that it was for a species of this group that Morch, Journ. de Conchyl. for 1872, formed a new subgenus "Microcystina" (as distinct from the sculptured Microcystis, of Beck), with N. rinkii, Mörch, from the Nicobar Islands, as his type! Microcystina seems to me to bear somewhat the same relationship to the larger and closely allied mollusks known as Macrochlamys that the European species of Vitrea (of Fitzinger) do to Hyalina.” (Godwin-Austen & Nevill, 1879)
Godwin-Austen & Nevill (1879) original descriptions on Nanina (Microscystina) townsendiana – “Testa minutissima, N. minimae (H. Adams, P. Z. S. 1869), a me detects, affinis; vix rimata, planiuscula, vitrea, nitida et laevis; anfract. 4½, perlente crescentes, sutura impressa sejuncti, ultimo majore, prope aperturam vix dilatato, ad peripheriam rotundato, basi convexiusculo; apertura minima, angusta, margine columellari perobliquo vix descendente.”
Nanina (Microscystina) townsendiana – “Alt. 1 (prox.), diam. 1 (prox.) mill.” (Godwin-Austen & Nevill, 1879)
Type locality – “Buket Pondong cave” Leg. Dr. Townsend (Godwin-Austen & nevill, 1879)
Other locality – “Tomoh Begog, Ulu Kenyam Kechil, Pahang” (Benthem-Jutting, 1960)