Something that's been on my list of "to do's" for a long time - present all five Florida Oyster Drills together with comparative notes. Finally got to it.

http://z14.invisionfree.com/Conchologist_Forum/index.php?showtopic=1929

Links are included to more detail for all five:

Eupleura caudate and sulcidentata.

Urosalpinx Cinerea, perrugata and tampaensis.

Comments regarding range extensions, etc. appreciated.

Note that Harry Lee in his Marine Shells of Northeast Florida 2009 suggests a forth unnamed Urosalpinx is present in Florida. See link at above site.

Marlo