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Speetoniceras agnessense

Cephalopoda - Ammonitida - Polyptychitidae

Taxonomy
Speetoniceras agnessense was named by Imlay (1960) [DISTRIBUTION: Early Cretaceous; Pacific Coast, North America.]. Its type specimen is USNM 129658, a shell, and it is not a trace fossil.

Synonymy list
YearName and author
1960Speetoniceras agnessense Imlay p. 213 figs. pl. 42, figs. 6, 9, 10, 15, 17

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
RankNameAuthor
subclassAmmonoidea()
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyPerisphinctaceaeSteinman 1890
familyPolyptychitidaeWedekind 1918
subfamilySimbirskitinae(Pavlow 1892)
genusSpeetonicerasPavlow 1891
speciesagnessense

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