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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Significance of Crustaceans in Dwarfed Faunas
Harold W. Scott
ABSTRACT
A survey of literature on fossil anti living crustacea fails to uncover a single reported case of unquestioned dwarfing.
The molt stages of crustacea introduce a factor that is not ordinarily involved in the study of other invertebrates. Ostracodes pass through 7-9 molt stages. lt is conceivable that a group of molts could be misinterpreted as "dwarfing."
An investigation concerning dwarfing in trilobites failed to uncover any evidence which would indicate the existence of such a fauna.
The crustaceans are normal in dwarfed faunas because they were free swimming forms and lived in that portion of the water which had a normal pH. Whereas, the dwarfed forms were bottom dwellers that lived in an environment where the pH was low and the H2S high.
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