Onychochilus minutissimus, Yoo, 1988

Yoo, E. K., 1994, Early Carboniferous Gastropoda from the Tamworth Belt, New South Wales, Australia, Records of the Australian Museum 46 (1), pp. 63-120 : 73

Onychochilus minutissimus Y00

Onychochilus minutissimus Yoo, 1988: 240 , figs 12-14.

Additional material. 3 specimens ( F78356 ) .

Remarks. This species is extremely rare and small in size; a total of seven specimens have been recovered from the type locality, including four specimens in previous investigations ( Yoo, 1988). The shells exhibit perfectly balanced adult forms with a sharp boundary between protoconch and teleoconch. This species differs from the type species O. physa Lindstrom in being much smaller in size and in lacking ornamentation.