Ptycta
Ptycta is a rarely encountered genus of extinct ammonoids within the order Goniatitida. These cephalopods existed during the Devonian period. They are characterized by their distinctive suture patterns, which are used for taxonomic classification. While not as widely studied or commonly found as some other goniatite genera, Ptycta contributes to our understanding of the evolution and diversification of ammonoids during this significant period in Earth's history. Further research is ongoing to clarify the precise relationships of Ptycta within the goniatite phylogeny and to understand the paleoecological conditions in which they thrived.