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Cosmoceras (Gulielmiceras) alaskanum

Cephalopoda - Ammonitida - Kosmoceratidae

Taxonomy
Cosmoceras (Gulielmiceras) alaskanum was named by Imlay (1953). Its type specimen is USNM 108141, a shell, and it is a 3D body fossil. Its type locality is USGS Mesozoic 2920, Iniskin Bay, which is in a Callovian marine siliciclastic in the Chinitna Formation of Alaska.

Sister species lacking formal opinion data
C. ornatum

Synonymy list
YearName and author
1953Cosmoceras (Gulielmiceras) alaskanum Imlay p. 100 figs. Pl 49, figs 13-16

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyPerisphinctoidea(Steinman 1890)
familyKosmoceratidaeHaug 1887
genusCosmocerasBuckman 1920
subgenusGulielmiceras
speciesalaskanum

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.

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Diagnosis
No diagnoses are available