Definition of Ammonoid. Meaning of Ammonoid. Synonyms of Ammonoid

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Definition of Ammonoid

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Meaning of Ammonoid from wikipedia

- Ammonoids are extinct, (typically) coiled-s****ed cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid...
- cephalopods, along with the extinct ammonoids (ammonites) and living coleoids (such as squid, octopus, and kin). While ammonoids and coleoids are monophyletic...
- Tri****ic epoch. The biostratigraphy is constrained by the presence of the ammonoids Tirolites and Bajarunia, and conodonts. The Tirolites/Columbites beds...
- Goniatids, informally goniatites, are ammonoid cephalopods that form the order Goniatitida, derived from the more primitive Agoniatitida during the Middle...
- 99 million years ago. During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed...
- Clymeniida is an order of ammonoid cephalopods from the Upper Devonian characterized by having an unusual dorsal siphuncle. They measured about 4 cm (1...
- period (231 million years ago). They are considered ancestors of the ammonoids, as well as of the coleoids (octopus, squid, cuttlefish, and the extinct...
- agoniatitid ammonoids would die out in the Taghanic event in the upper middle Givetian. Goniatite ammonoids would give rise to further ammonoid orders, thus...
- Prolecanitida is an order of extinct ammonoid cephalopods, the major Late Paleozoic group of ammonoids alongside the order Goniatitida. Prolecanitids...
- Turrilites is a genus of helically coiled ammonoid cephalopods from the lower part of the Upper Cretaceous (Cenomanian and Turonian); generally included...