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Paracaloceras concavum Taylor 1998 (ammonite)

Cephalopoda - Ammonitida - Arietitidae

PaleoDB taxon number: 297588

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 Paracaloceras according to D. G. Taylor 1998

Sister taxa: Paracaloceras coregonense, Paracaloceras haueri, Paracaloceras multicostatum, Paracaloceras rursicostatum, Paracaloceras varaense, Alpinoceras perspiratum

Type specimen: NWMNH 25031, a shell. Its type locality is First Canyon, Shoshone Mountains (Canadensis zone), which is in an Angulata marine limestone in the Sunrise Formation of Nevada.

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell width 23.5, shell diameter 116.6