From the album: Gastropods of the Tamiami Formation
Bostrycapulus aculeata ponderosa (H.C. Lea, 1843)
Location: APAC, Sarasota County, Florida USA.
Status: Extinct
Notes: Campbell (1994) listed all spiny slipper shells from the Southeastern USA as one of two subspecies of the extant B. aculeata. Subspecies ponderosa is highly inflated and it is variable in terms of spines as stacked individuals will remove spines of individual below. Due to different life style from extant B. aculeata this could be considered a separate species.