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Eutrephoceras hallidayi

Cephalopoda - Nautilida - Nautilidae

Taxonomy
Nautilus hallidayi was named by Waring (1914) [DISTRIBUTION: Paleocene; California.]. Its type specimen is Stanford University Paleo Type Coll. 560, a shell, and it is a 3D body fossil.

It was recombined as Eutrephoceras hallidayi by Vokes (1937) and Miller (1947).

Synonymy list
YearName and author
1914Nautilus hallidayi Waring pp. 783-784
1917Nautilus hallidayi Waring p. 89 figs. Pl. 13, Fig. 13
1925Nautilus hallidayi Nelson p. 403
1937Eutrephoceras hallidayi Vokes p. 5
1947Eutrephoceras hallidayi Miller p. 31

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
subclassNautiloideaAgassiz 1847
orderNautilidaAgassiz 1847
superfamilyNautiloidea(de Blainville 1825)
familyNautilidaede Blainville 1825
genusEutrephoceras
specieshallidayi()

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.

†Eutrephoceras hallidayi Waring 1914
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Diagnosis
ReferenceDiagnosis
C. A. Waring 1914Shell immense, being about 36 mm. in greatest diameter. The inner whorls are completely enveloped, while the last whorl is more evolute. Dorsum r ture elliptical, concave below where it envelops The outer volution has a width slightly less than diameter of the shell. Sutures slightly inflecte It is probably the oldest species of