Goniatids, informally goniatites, are ammonoid cephalopods that form the order Goniatitida, derived from the more primitive Agoniatitida during the Middle Devonian some 390 million years ago (around Eifelian stage).

Fossils of species within this genus have been found widespread in North America, Eurasia, and north Africa.

Bactrites, genus of extinct cephalopods (animals related to the modern squid, octopus, and nautilus) found as fossils in marine rocks from the Devonian to the Permian periods (between 408 and 245 million years ago).

Goniatite or Goniatids Informally Goniatites, are ammonoid cephalopods that form the Order Goniatiida, derived from the more primitive Anarcestida during the Middle Devonian some 390 million years ago.

2022年6月3日 · Fossil Info. Goniatites have a spiral shell with a distinctive very large outer whorl. The shell can show striking patterns made by the sutures that connect the different body chambers in the shell. They are relatives of squid and octopus and went extinct at the end of the Permian period around 250 million years ago. Fun Fact

Goniatites are first seen in Devonian rocks almost 400 million years old. They also lived in Carboniferous times where the evolution of their shape and shells means they are very useful for dating different periods of time.

A Goniatite is a group of ammonoid cephalopods that appeared in the Early Emsian period, rapidly diversified, but experienced a significant loss of diversity during the Daleje Event around 400 million years ago.

Goniatites are an extinct species of ancient marine animal that evolved approximately 400 million years ago. Flourishing in the Devonian period, goniatites now act as important zone, or index, fossils to geologists who use them to identify rocks of that period.

Goniatites are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids. Early in the Devonian period, some 400 million years ago, goniatites originated from within the more primitive anarcestine ammonoids.