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HYPOSTRACUM [2 records]

Record 1 1998-11-06

English

Subject field(s)
  • Paleontology
DEF

... the inner layer of the shell wall of a bivalve mollusk secreted by the entire epithelium of the mantle ...

French

Domaine(s)
  • Paléontologie
CONT

[...] le test [d'un ammonite] est formé en général de trois couches superposées : [...] [la couche] interne ou hypoostracum [est] lamelleuse, nacrée, importante, généralement seule conservée.

Spanish

Save record 1

Record 2 1977-06-24

English

Subject field(s)
  • Paleontology
OBS

[The term articulamentum was] formerly used to indicate the inner, usually hard, semiporcelaneous shell layer, generally projecting past the tegmentum on the sides and front of the valves [of Polyplacophora] to form the insertion plates and the insertion plates and the sutural laminae; [it has been] recently restricted to indicate the shell layer between [the] tegmentum and [the] hypostracum, called the articulamentum("sensu stricto") and composed of several separate components of crystalline shell structure.

French

Domaine(s)
  • Paléontologie
OBS

La partie libre [de la plaque d'une coquille de Chiton] est formée de deux couches (...). [L'] interne [s'appelle] "articulamentum" (...)

Spanish

Save record 2

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