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PRODUCTACEA [1 record]

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Record 1 1977-06-27

English

Subject field(s)
  • Paleontology
OBS

[Brachiopods of the] superfamily Productacea [are] generally attached by ringlike attachment spines in early growth stages, and rarely cemented by [an] umbo, living free in later growth stages and supported by halteroid spines, interareas, teeth and sockets [are] weakly developed in primitive forms only; [there is a] ginglymus in gerontic stages of some genera; [the] cardinal process [is] bilobate or trilobate, rarely quadrilobate; [there is a] diaphragm in [the] brachial valve and marginal ridges in one or both valves in some genera. "L.Dev.-U.Perm."

French

Domaine(s)
  • Paléontologie
OBS

[Les Brachiopodes de la] super-famille des Productacea [sont des] formes aberrantes. [La] cavité de la coquille [est] en général grande; [il y a] habituellement des épines sur la charnière ou sur les valves, servant pour la fixation ou comme support, sinon pour la circulation d'eau.

Spanish

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