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).

Synonyms

Metacoceras (Mojsvaroceras) frenchi was named by Kummel (1953). Its type specimen is USNM 107069 and is a 3D body fossil. Its type locality is Montpelier Canyon, upper shale member, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.

It was synonymized subjectively with Phaedrysmocheilus idahoensis by Brayard et al. (2019).
Germanonautilus montpelierensis was named by Kummel (1953). Its type specimen is USNM 107089 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 synonymized subjectively with Phaedrysmocheilus idahoensis by Brayard et al. (2019).
Pleuronautilus (Enoploceras) newelli was named by Kummel (1953). Its type specimen is USNM 107085 and is a 3D body fossil. Its type locality is Montpelier Canyon, upper shale member, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.

It was synonymized subjectively with Phaedrysmocheilus idahoensis by Brayard et al. (2019).

Synonymy list

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

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Cephalopoda	Cuvier 1797

Rank	Name	Author
subclass	Nautilia	(Wade 1988)
order	Nautilida	Agassiz 1847
suborder	Tainoceratina	Shimansky 1964
superfamily	Trigonoceratoidea	(Hyatt 1884)
family	Tainoceratidae	Hyatt 1883
genus	Phaedrysmocheilus
species	idahoensis	()

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

†Phaedrysmocheilus idahoensis Kummel 1953

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Invalid names: Enoploceras newelli Kummel 1953 [synonym], Germanonautilus montpelierensis Kummel 1953 [synonym], Mojsvaroceras frenchi Kummel 1953 [synonym]

Diagnosis

No diagnoses are available

Measurements

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

Composition:

aragoniteo

Environment:

marinec

Locomotion:

actively mobileo

Life habit:

nektobenthico

Diet:

carnivoreo

Vision:

well-developedc

Created:

2005-01-28 02:35:00

Modified:

2009-09-27 12:10:42

Source: o = order, c = class

References: Kiessling 2004, Kiessling 2003

Age range: Spathian or 248.10000 to 246.70000 Ma

Collections (3 total)

Time interval	Ma	Country or state	Original ID and collection number
Spathian	248.1 - 246.7	USA (Idaho)	Metacoceras frenchi, Germanonautilus montpelierensis, Pleuronautilus idahoensis (type locality: 110956) Metacoceras frenchi, Pleuronautilus newelli (110958) Phaedrysmocheilus idahoensis (202197)