Gastropod maybe platyceras? Homepage › Forums › What Is It? › Gastropod maybe platyceras? Tagged: gastropod, identify This topic has 0 replies, 1 voice, and was last updated 2 years, 5 months ago by David Powers. Viewing 1 post (of 1 total) Author Posts July 31, 2018 at 9:11 am #40308 David PowersParticipant I found this cast. It measures 4.5 by 4.5 and 2.5 cm wide. I believe it is a gastropod, maybe platyceras. I’m not sure. The area is Mission Canyon Limestone, part of the Madison Group. Mississippian Visean. Alternative Id is useful. Attachments:You must be logged in to view attached files. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.