Phragmocone
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Phragmocone — The phragmocone is the chambered portion of the shell of a cephalopod. It is divided by septa into camerae. In most nautiloids and ammonoids, the phragmocone is a long, straight, curved, or coiled structure, in which the camarae are linked by a… … Wikipedia
phragmocone — n. [Gr. phragmos, fence; konos, cone] (MOLLUSCA: Cephalopoda) A thin, conical internally chambered shell … Dictionary of invertebrate zoology
phragmocone — noun The chambered portion of the shell of a cephalopod, divided by septa into camerae … Wiktionary
phragmocone — phrag·mo·cone … English syllables
phragmocone — noun the thin conical chambered internal shell (either straight or curved) of a belemnite • Syn: ↑phragmacone • Hypernyms: ↑shell … Useful english dictionary
phragmacone — Phragmocone Phrag mo*cone, n. [Gr. ?, ?, a fence, an inclosure + ? a cone.] (Zo[ o]l.) The thin chambered shell attached to the anterior end of a belemnite. [Written also {phragmacone}.] [1913 Webster] … The Collaborative International Dictionary of English
CÉPHALOPODES — Cette classe de Mollusques (650 espèces actuelles, plus de 10 000 fossiles) présente des caractères primitifs, tels que les traces d’une segmentation initiale, rendues manifestes chez le Nautile par la présence de quatre branchies. Il existe… … Encyclopédie Universelle
Belemnoidea — Taxobox name = Belemnites fossil range = fossil range|416|65.5Devonian Cretaceous image width = 250px image caption = Small Belemnite fossils regnum = Animalia phylum = Mollusca classis = Cephalopoda subclassis = Coleoidea unranked ordo = Cohort… … Wikipedia
Ammonite — For other uses, see Ammonite (disambiguation). Ammonites Temporal range: 400–65.5 Ma … Wikipedia
Proostraca — Proostracum Pro*[ o]s tra*cum, n.; pl. {Pro[ o]straca}. [NL., fr. Gr. ? before + ? shell of a testacean.] (Zo[ o]l.) The anterior prolongation of the guard of the phragmocone of belemnites and allied fossil cephalopods, whether horny or… … The Collaborative International Dictionary of English
