Alcidellus
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| Genus: | Alcidellus Westermann, 1958
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Alcidellus is an oxyconic (sharp ventered) haploceratacean ammonite from the Middle Jurassic.
Alcidellus was named as a genus buy Gerd Westermann in 1958. It is now generally seen as a subgenus of Oxycerites, differing from Oxyceratites (O) in having a broader venter with ventrolateral shoulders. The shell of Oxycerites, including O (Alcidellus) is generally smooth, essentially involute with a small umbilicus, highly compressed with flanks converging on a narrow, somewhat sharp venter. Sutures are ammonitic.
References
- Notes
- ^ Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2008-05-07. Retrieved 2017-10-18.
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- Publications
- An Early Bathonian Tethyan Ammonite Fauna from Argentina, by Alberto C Riccardi and Gerd E.G. Westermann. Palaeontology, Volume 42. no2, pub online 21 Nov 2003. [1]
- Upper Bathonian and lower Callovian ammonites from Chacay Melehue (Argentina), by Horacio Parent. Acta Palaeontologica Polonica 43, 1, 69-130. 1998. [2]