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Glochiceras (Coryceras) crenatum (Brugiére 1789)
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By Ludwigia
Taxonomy
Ammonite
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Ammonitida
Family: Glochiceratidae
Genus: Glochiceras (Coryceras)
Species: Glochiceras (Coryceras) crenatum
Author Citation Bruguières 1789
Geological Time Scale
Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Late
International Age: Early Oxfordian
Stratigraphy
Ifenthal Formation
Schellenbrücke-Bank Member
Biostratigraphy
cordatum zone
Provenance
Collector: Roger Furze
Date Collected: 03/27/2011
Acquired by: Field Collection
Dimensions
Diameter: 22 mm
Location
Grube Weichlen
Frick/Ueken
Aargau
Switzerland
Comments
Limestone steinkern. Practically complete. The original Type of this species has been lost and its placement within the taxonomy of the Glochiceratidae is still not certain. Some still refer to Creniceras as the genus and order it under the Oppeliidae, although many believe that even Creniceras renggeri should be ranked under Glochiceras. Yet another unsolved taxonomic riddle.
Literature: Gygi 1991, The vertical range of the ammonoid genera Glochiceras, Creniceras and Bukowskites in the late Jurassic of northern Switzerland and in adjacent southern Germany. Stuttgarter Beiträge, Ser. B, Nr. 179
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