PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Phaedrysmocheilus idahoensis

Cephalopoda - Nautilida - Tainoceratidae

Taxonomy

Pleuronautilus idahoensis was named by Kummel (1953). Its type specimen is USNM 107079 and is a 3D body fossil. Its type locality is Hot Springs, Columbites Zone, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.

It was recombined as Phaedrysmocheilus idahoensis by Schastlivtseva (1988), Brayard et al. (2019).

Year	Name and author
1953	Metacoceras (Mojsvaroceras) frenchi Kummel p. 23 figs. Pl 2, figs 1-10; pl 4, figs 8-10; text-fig 11
1953	Germanonautilus montpelierensis Kummel p. 30 figs. Pl 3, fig 11; text-fig 14
1953	Pleuronautilus idahoensis Kummel p. 37 figs. Pl 4, figs 2-4; text-fig 17
1953	Pleuronautilus (Enoploceras) newelli Kummel p. 41 figs. Pl 4, fig 1; text-fig 19
1988	Phaedrysmocheilus idahoensis Schastlivtseva p. 25
2019	Phaedrysmocheilus idahoensis Brayard et al. p. 32 figs. 11-13

part	N	mean	minimum	maximum	median	s.d.
shell height	3	39.4	30.0	51.0	40.0	10.5
shell diameter	3	85.3	69.5	105.0	85.0	17.8
shell inflation	3	23.0	18.8	29.5	22.0	5.49