Definition of Ammonoids. Meaning of Ammonoids. Synonyms of Ammonoids

- Ammonoids are extinct spiral s****ed cephalopods comprising the subclass Ammonoidea. They are more closely related to living coleoids (i.e., octopuses...
- cephalopods, along with the extinct ammonoids (ammonites) and living coleoids (such as squid, octopus, and kin). While ammonoids and coleoids are monophyletic...
- 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****...
- the superficially similar Baculites and related Cretaceous orthoconic ammonoids. Both are long and tubular in form, and both are common items for sale...
- began, 393.3 Ma. During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed...
- Ammonitida or "True ammonites" are an order of ammonoid cephalopods that lived from the Jur****ic through Paleocene time periods, commonly with intricate...
- 2 million years ago. During this time, the first ammonoids appeared, descending from bactritoid nautiloids. Ammonoids during this time period were simple and differed...
- 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...
- anomalous fossils are those of extinct snails, the ammonoids. Talent was convinced that Gupta's ammonoid specimens were directly from a fossil site near...