Girtyspira Knight, 1936

Australian Carboniferous species. Girtyspira inflata n.sp., from Swains Gully.

Remarks. Kollmann & Yochelson (1976) transferred Girtyspira from the subulitoideans to the opisthobranchs, on the basis of a deviated protoconch and sutural ramp. Erwin (1988) also placed Girtyspira in the opisthobranchs. The studied form Girtyspira inflata n.sp. has a deviated protoconch, but not seen clearly as heterostrophic. It is, here, retained in the Subulitoidea.