ammonites
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Leioceras comptocostosum Chandler and Callomon 2009 (ammonite)

Cephalopoda - Ammonitida - Graphoceratidae

PaleoDB taxon number: 299660

Full reference: R. Chandler and J. Callomon. 2009. The Inferior Oolite at Coombe Quarry, near Mapperton, Dorset, and a new Middle Jurassic ammonite faunal horizon, Aa-3b, Leioceras comptocostosum n.biosp. in the Scissum Zone of the Lower Aalenian. Proceedings of the Dorset Natural History and Archaeological Society 130:99-132

Belongs to Leioceras according to R. Chandler and J. Callomon 2009

Sister taxa: Leioceras comptum, Leioceras costosum, Leioceras lineatum, Leioceras opalinum, Leioceras subcostosum

Type specimen: SM X 40269, a shell. Its type locality is Coombe Quarry, Mapperton, Bed 2c,d, which is in an Opalinum shallow subtidal conglomerate/limestone in the United Kingdom.

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell width 21.4, shell diameter 78.3