ammonoid

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ammonoid

[′a·mə‚nȯid]
(paleontology)
A cephalopod of the order Ammonoidea.
References in periodicals archive ?
Emergence and collapse of the Frasnian conodont and ammonoid communities in the Holy Cross Mountains, Poland.
However, the problem associated with the identification of the Jurassic - Cretaceous boundary persists for shallow water marine and continental sedimentary successions in which biostratigraphic data are derived from several groups of benthic macrofossils, foraminifera, ostracods and charophytes that are uncorrelated to ammonoid or planktonic zonations.
1) Ammonoids have an exceptionally good fossil record.
For several more years, Tim, focusing increasingly on the marine Triassic and its ammonoid fauna, divided his field time between the Arctic Islands and northeastern British Columbia, where the upper part of the Triassic stratigraphic column is particularly well developed.
Westermann, 1973) and ammonoids (Westermann, 1975; Hewitt and Westermann, 1986; Jacobs, 1990; Daniel et al.
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).
The ammonoids studied were deposited in museums (Museu de Valltorta: MV, Valencia; Conjunto Paleontologico de Teruel: CPT, Aragon) or in university collections (Colleccions de Paleontologia de la Universitat Autonoma de Barcelona: PUAB, Bellaterra, Catalunya).
The surveys in the present study indicate that more than 800 ammonoids and 300 belemnoids are present in the tile of the shopping complex.
Morphology and morphologic diversity of mid-Carboniferous (Namurian) ammonoids in time and space.
However, over the crinoidal tract a set of red, ferruginous detritic limestones appear, fol lowed by an alternation of yellowish marls and marly/ silty limestones levels with brachiopods, some ammonoids and trace-fossils of Thalassinoides type.