articulamentum
n. [L. articulare, to divide]
(MOLLUSCA: Polyplacophora)
The shell layer between the tegmentum and hypostracum, that is composed of several separate components of crystalline shell structure; formerly the hard, semiporcellaneous shell layer projecting past the tegmentum forming the insertion plates and the sutural laminae.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • articulamentum — ar·tic·u·la·men·tum …   English syllables

  • articulamentum — …   Useful english dictionary

  • sutural laminae — (MOLLUSCA: Polyplacophora) Apophyses plates; anterior plate like projections of the articulamentum extending from either side of an intermediate or tail valve; may be separated by a sinus or partially joined by a laminar extension of the… …   Dictionary of invertebrate zoology

  • Chiton — This article is about the mollusc. For the ancient Greek article of dress, see Chiton (costume). Chiton Temporal range: Devonian–Recent[1][2] …   Wikipedia

  • insertion plate — (MOLLUSCA: Polyplacophora) A narrow marginal extension of the articulamentum layer in the head and tail valves and sides of the intermediate valves, projecting into the girdle; lamina of insertion …   Dictionary of invertebrate zoology

  • mesostracum — n. [Gr. mesos, middle; ostrakon, shell] (MOLLUSCA: Polyplacorphora) A calcareous shell layer between the tegmentum and the articulamentum in certain more highly developed living species …   Dictionary of invertebrate zoology

  • posterior sinus — (MOLLUSCA: Polyplacophora) A recess in the posterior median line of a tail valve, formed by the tegmentum or in some forms by the articulamentum …   Dictionary of invertebrate zoology

  • sutural plate — (MOLLUSCA: Polyplacophora) Lamina of the articulamentum across the jugal sinus of the intermediate and tail valve, extending between the sutural laminae …   Dictionary of invertebrate zoology

  • teeth — n. [A.S. toth, tooth] 1. Hardened growths on mandibles, maxillae or stomatal walls. 2. (CNIDARIA: Hydrozoa) Deep or very shallow indentations on the hydrothecal margins; peglike chitinous growths just inside the margins. 3. (MOLLUSCA:… …   Dictionary of invertebrate zoology

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