Phaedrysmocheilus idahoensis Kummel 1953

Cephalopoda - Nautilida - Tainoceratidae

Alternative combination: Pleuronautilus idahoensis

Synonyms: Enoploceras newelli Kummel 1953, Germanonautilus montpelierensis Kummel 1953, Metacoceras (Mojsvaroceras) frenchi Kummel 1953, Mojsvaroceras frenchi Kummel 1953, Pleuronautilus (Enoploceras) newelli Kummel 1953

Full reference: B. Kummel. 1953. American Triassic coiled nautiloids. United States Geological Survey Professional Paper 250:1-104

Belongs to Phaedrysmocheilus according to A. Brayard et al. 2019

See also Kummel 1953 and Schastlivtseva 1988

Sister taxa: Phaedrysmocheilus evolutus, Phaedrysmocheilus involutus, Phaedrysmocheilus nestori, Phaedrysmocheilus ornatus, Phaedrysmocheilus subaratus, Phaedrysmocheilus velivolus

Type specimens:

  • Phaedrysmocheilus idahoensis: USNM 107079. Its type locality is Hot Springs, Columbites Zone, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.
  • Enoploceras newelli: USNM 107085. Its type locality is Montpelier Canyon, upper shale member, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.
  • Germanonautilus montpelierensis: USNM 107089. Its type locality is Hot Springs, Columbites Zone, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.
  • Mojsvaroceras frenchi: USNM 107069. Its type locality is Montpelier Canyon, upper shale member, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.

Average measurements (in mm): shell diameter 85.3

Distribution:

• Triassic of United States (3: Idaho collections)

Total: 3 collections including 6 occurrences

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Specimen images are retrieved through the ePANDDA API.


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