The sedentary habits of Platyceras.

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Abstract
THE genlls PLatycera8 was fonnded by OOlll'ad''<-in 1840 for a Paleozoic group of gasteropodous shells "sub-oval or subglobose, with a small spire, the whorls of which are sometimes free and sometimes contiguous; the mouth generally campanulated or expanded."Hitherto these fossil shells had been referred to the genus of modern :Mollusca OajJuZ'u8, proposed by }Ionfortt in 1810.Oonrad's name, however, for this fossil group was not until within the past few years generally aecepted, preference having been given by most European writers and also by some American authors to AcrocuZia of Phillips,:j: notwithstanding the fact that the type of Phillips's genus was a typical form of Platycera8.Although the forms of this genus present so few classificatory characters of definite specific value more than three hundred species have been described-over one•half of which are from America.In this genns, as in many other Paleozoic genera, numerons species haye been based not on any apparent distinctive character, hut seemingly simply OIl their OCClll'rence at different geological
Reference Key
openalex_W2327929627 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors C. R. Keyes
Journal american journal of science
Year 1888
DOI
10.2475/ajs.s3-36.214.269
URL
https://doi.org/10.2475/ajs.s3-36.214.269
Keywords Keywords not found

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