Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Protokionoceras

Cephalopoda - Orthocerida - Geisonoceratidae

Synonymy list
YearName and author
1910Protokionoceras Grabau and Shimer
1958Protokionoceras Sweet
1964Protokionoceras Teichert et al. p. 237
2002Protokionoceras Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
RankNameAuthor
phylumMollusca
classCephalopodaCuvier 1797
subclassOrthoceratoideaZhuravleva 1994
orderOrthoceridaKuhn 1940
familyGeisonoceratidaeZhuravleva 1959
genusProtokionocerasGrabau and Shimer 1910

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.

Diagnosis
No diagnoses are available