ammonoid


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Related to ammonoid: ammonite, Ammonoidea

ammonoid

[′a·mə‚nȯid]
(paleontology)
A cephalopod of the order Ammonoidea.
References in periodicals archive ?
1) Ammonoids have an exceptionally good fossil record.
It was his work in the Canadian Arctic Islands, beginning in 1954, that laid the foundation for his subsequent brilliant career as a paleontologist and biostratigrapher specializing in the now-extinct class of coiled, marine molluscs known as ammonoids.
Minimum suture complexity in ammonoids increased slightly during the initial trend, but Boyajian and Lutz (1992) argue that the trend was passive (based on the behavior of the variance).
Ammonoid shell streamlining was studied by Kummel and Lloyd (1955) using a circulating water channel and plaster models of ammonoid shells.
In the present work, we update and review the biostragraphic ammonoid knowledge of this basin following the latest version of the standard Mediterranean ammonite zonation (Reboulet et al, 2011).
2006): The Early Triassic ammonoid recovery: paleoclimatic significance of diversity gradients.
The stratigraphically valuable invertebrates, ammonoids, are missing in those deposits, and conodonts are very rare, being represented by a shallow-water polygnathid assemblage.