Trilobites Posted September 13, 2016 Author Share Posted September 13, 2016 On 9/8/2016 at 2:17 PM, Guguita said: Hi!Very nice collection ! IMO, this one is not an ammonite (Ammonoidea subclass_ammonitida order_fllower-shaped suture lines), but a nautiloid (Nautiloidea subclass), because the suture lines are much more simple. Here it's a "little guide" explaining the suture line differences between some cephalopod groups : Wow, I never knew that! Thank you. 1 Link to comment Share on other sites More sharing options...
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