Definition of Ammonoids. Meaning of Ammonoids. Synonyms of Ammonoids

- order Ammonitida, the only remaining group of ammonoids from the Jur****ic up until their extinction. Ammonoids exhibited considerable diversity over their...
- cephalopods, along with the extinct ammonoids (ammonites) and living coleoids (such as squid, octopus, and kin). While ammonoids and coleoids are monophyletic...
- Đaković, Mrdak & Gawlick (2025) describe three ****emblages of Anisian ammonoids from the Komarani and Bulog formations (Montenegro), including fossils...
- 99 million years ago. During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed...
- Prolecanitida is an order of extinct ammonoid cephalopods, the major Late Paleozoic group of ammonoids alongside the order Goniatitida. Prolecanitids...
- outer edge as in most ammonoids. Developmentally, the siphuncle in clymeniids starts off ventrally, like that in other ammonoids, but after the first few...
- However, ammonoid fossils switch over to the lower Acutimitoceras (Stockumites) genozone (UD VI-F), indicating that post-Devonian ammonoids were beginning...
- somewhat simpler, being either straight or slightly curved, whereas later ammonoids showed suture patterns of increasing complexity. One explanation for this...
- the superficially similar Baculites and related Cretaceous orthoconic ammonoids. Both are long and tubular in form, and both are common items for sale...
- Maximites is a genus of Late Carboniferous ammonoids. Adult specimens were the smallest known ammonoids, only at about 1 cm (0.39 in) in diameter of s****...