Gyrophioceras morganense Taylor 1998

Cephalopoda - Ammonitida - Arietitidae

Alternative combinations: Paracaloceras (Gyrophioceras) morganense, Paracaloceras morganense

Full reference: D. G. Taylor. 1998. Late Hettangian-early Sinemurian (Jurassic) ammonite biochronology of the western Cordillera, United States. Geobios 31:467-497

Belongs to Gyrophioceras according to L. M. Longridge et al. 2008

See also Taylor 1998 and Taylor and Guex 2002

Sister taxa: Gyrophioceras mineralense, Gyrophioceras praespiratissimum, Gyrophioceras supraspiratum

Type specimen: NWMNH 25036, a shell. Its type locality is Graylock section, P. morganense assemblage, which is in an Angulata marine limestone in the Graylock Formation of Oregon.

Average measurements (in mm): shell diameter 47.8


• Jurassic of Canada (1: British Columbia collection), United States (3: Oregon)

Total: 4 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.

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