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by Stratigraphy.net
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HETTANGIAN: TETHYAN AFFINITY

Source info:

Author: FossilHuntress
Date: 2020-06-27 03:21:00
Blog: ARCHEA
URL: https://fossilhuntress.blogspot.com/2020/06/hettangian-tethyan-affinity.html

Summary:

This Hettangian ammonite, Alsatites proaries, is a lovely example of the cephalopods cruising our ancient oceans at that time. Alsatites is an extinct genus of cephalopod belonging to the Ammonite subclass. They lived during the Early Jurassic, Hettangian till the Sinemurian and are generally extremely evolute, many whorled with a broad keel. Or, as described by one of my very young friends, he

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