Asthenoceras

Asthenoceras
Temporal range: Bajocian[1]
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ammonitida
Superfamily: Hildocerataceae
Family: Hildoceratidae
Genus: Asthenoceras
Buckman, 1899
Species

See text.

Asthenoceras is a dwarfish, Middle Jurassic (Lower Bajocian) ammonoid with an evolute, smooth, compressed, discoidal, strongly keeled shell. Asthenoceras belongs to the Hildoceratidae (subfamily Grammoceratinae) and may be a subgenus of the Lower Jurassic (Upper Toarcian) Grammoceras.

References

  1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
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