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PLATYCERATIDAE [1 record]

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Record 1 1977-07-04

English

Subject field(s)
  • Paleontology
OBS

[Gastropods of the] family Platyceratidae [are] coprophagous on crinoids and cystoids (...), the shells showing through their range from mid-Ordovician to Iate Paleozoic progressively more complete adaptation to a stationary life, principally on crinoid calices; earlier members [are] turbiniform or naticiform, with [a] flat columellar lip but with irregular prosocline growth lines; [the] lip [becomes] more uneven, conforming to irregularities of the crinoid or cystoid calyx, and the primitively coiled shell [uncoiled or developed] other peculiarities of growth as [the] crinoids became more elaborate in the course of time; ornament present in more primitive stocks but gradually lost. "M.Ord.-M.Perm."

French

Domaine(s)
  • Paléontologie
OBS

[La] famille des Platyceratidae [est une] famille [de Mollusques] connue de l'Ordovicien au Permien.

Spanish

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