†Asthenoceras (ammonite)
Click image to enlarge. Click to access iDigBio record.
Cephalopoda - Ammonitida - Sonniniidae
Parent taxon: Witchelliinae according to M. K. Howarth 2013
See also Sepkoski 2002 and Westermann 1969
Sister taxa: Dorsetensia, Fontannesia, Guhsania, Newmarracarroceras, Witchellia
Subtaxa: Asthenoceras nannodes
Type: Grammoceras nannodes
Ecology: fast-moving nektonic carnivore
Distribution:
• Jurassic of Morocco (10 collections), United States (2: Alaska, Oregon)
Total: 12 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.