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Epistroboceras pitkinense

Cephalopoda - Nautilida - Trigonoceratidae

Taxonomy
Epistroboceras pitkinense was named by Niko and Mapes (2005) [Stroboceras (Epistroboceras) sp., Gordon, 1964, p. 147. Epistroboceras sp., Niko and Mapes, 2004, p. 341.]. Its type specimen is OUZC 5102, a shell, and it is not a trace fossil. Its type locality is Loc. 2. Road cut on the southern side of AR-Highway 66, ~1 km northeast of, which is in a Chesterian reef, buildup or bioherm grainstone/packstone in the Pitkin Formation of Arkansas.

Synonymy list
YearName and author
2005Epistroboceras pitkinense Niko and Mapes pp. 234 – 237 figs. 1, 2.1–2.8, 2.10, 2.11, 3.2, 3.4

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
subclassNautiloideaAgassiz 1847
orderNautilidaAgassiz 1847
superfamilyTrigonoceratoidea(Hyatt 1884)
familyTrigonoceratidae
genusEpistrobocerasTurner 1954
speciespitkinense

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
ReferenceDiagnosis
S. Niko and R. H. Mapes 2005Species of Epistroboceras with width/height ratios of 0.75–0.83 and dorsally shifted umbilical angle in adoral whorl with umbilical zone height per whorl height ratios of 0.17–0.25; ventral platform relatively wide; ventral (hyponomic) sinus U-shaped; siphuncular position ratios (see the description for its definition) are 0.23–0.25.