[1] The surface of these younger whorls bears flexuous growth lines, and a dense and very fine, somewhat irregular spiral striation, only visible where light reflects on the shell.

[1] On the body whorl a distinct peripheral belt is present on which the growth lines are strongly bent backward, indicating a deep sinus in the apertural margin.

[1] All protoconch whorls have a number of very narrow, distant and thread-like spiral lirae with a zigzag structure, just one of which remains visible between the upper and lower sutures.

[1] The presence of a subperipheral belt much the same as in Protatlanta souleyeti, on the other hand, demonstrates that a conchiolin keel has been present in this species.

Miocene of the Dominican Republic[2] and has a wide horizontal and vertical distribution; Langhian-Serravallian (Italy, Malta, Cyprus; RGM collections), Tortonian (Sicily), Piacenzian (Spain, Jamaica, Philippines), Pliocene of Anda, Pangasinan, Luzon, Philippines and ‘Middle Pliocene-Early Pleistocene’ (Japan).