Alcidellus: Difference between revisions
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'''''Alcidellus''''' is an oxyconic (sharp ventered) [[Haplocerataceae|haploceratacean]] [[Ammonitida|ammonite]] from the Middle Jurassic. |
'''''Alcidellus''''' is an oxyconic (sharp ventered) [[Haplocerataceae|haploceratacean]] [[Ammonitida|ammonite]] from the Middle Jurassic. <ref name="paleodb">{{cite web | title= Paleobiology Database - Alcidellus |authorlink =| coauthors = | year = | url = http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=300433&is_real_user=1| accessdate = 2017-10-19 }}</ref> |
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''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. |
''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. |
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Revision as of 18:48, 20 October 2017
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| Genus: | Alcidellus Westermann, 1958
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Alcidellus is an oxyconic (sharp ventered) haploceratacean ammonite from the Middle Jurassic. [2]
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.
{{cite journal}}:|archive-date=/|archive-url=timestamp mismatch; 2016-02-25 suggested (help); Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ "Paleobiology Database - Alcidellus". Retrieved 2017-10-19.
{{cite web}}: Cite has empty unknown parameter:|coauthors=(help)
- 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]