Protoconch Pro"to*conch, n. [Proto- + conch.] (Zo["o]l.) The embryonic shell, or first chamber, of ammonites and other cephalopods. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Protoconch — A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell of some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod. The protoconch may sometimes consist of several… …   Wikipedia

  • protoconch — n. [Gr. protos, first; konche, shell] (MOLLUSCA: Gastropoda) The embryonic shell of a univalve, indicated by the apical whorls of the adult shell being clearly demarcated from later ones; see prodissoconch …   Dictionary of invertebrate zoology

  • protoconch — pro·to·conch …   English syllables

  • protoconch — …   Useful english dictionary

  • Schneckenhaus — Gehäuse der Gefleckten Schnirkelschnecke (Arianta arbustorum) von oben …   Deutsch Wikipedia

  • Cavolinioidea — Taxobox name = Cavolinioidea image caption = An unidentified sea butterfly regnum = Animalia phylum = Mollusca classis = Gastropoda subclassis = Orthogastropoda superordo = Heterobranchia ordo = Opisthobranchia subordo = Thecosomata superfamilia …   Wikipedia

  • Whorl (mollusc) — A whorl is a single, complete 360° turn in the spiral growth of a mollusc shell. A mollusc shell is basically a long tube, usually coiled in a spiral for strength and compactness. The number of whorls in the shell depend on various factors in the …   Wikipedia

  • Odostomiinae — Odostomia pallida, O. conoidea, O. conspicua, O. truncatula Scientific classification Kingdom …   Wikipedia

  • Syrinx aruanus — Apertural view of a shell of Syrinx aruanus Scientific classification Kingdom: An …   Wikipedia

  • Oxygyrus keraudrenii — Temporal range: Pliocene Recent[1] Apical view of the shell of Oxygyrus keraudrenii from the Pliocene Epoch …   Wikipedia

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