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Parakionoceras

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This is an old revision of this page, as edited by Tom.Reding (talk | contribs) at 14:12, 10 April 2018 (+{{Taxonbar|from=Q7134834}} (EOL/GBIF/TPL taxon ID only); cleanup & WP:GenFixes on, using AWB). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Parakionoceras
Temporal range: M Silurian - Devonian
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Superorder:
Orthoceratoidea
Order:
Orthocerida
Family:
Kionoceratidae
Genus:
Parakionoceras

Foeste, 1928

Parakionoceras is an extinct nautiloid that lived during the Silurian and Devonian in what is now Europe; included in the orthoceratoid family Kionoceratidae in the Treatise part K, 1964 but removed to the Arionoceratidae in Kröger 2008.

Parakionoceras has a long, faintly curved, exogastric shell with relatively long camerae and straight transverse sutures. The surface is lined with sharp-edged longitudinal ribs separated by broader concave inner areas. The siphuncle is slightly eccentric; necks short and loxochoantitic, directed slightly inward; connecting rings slightly inflated. Cameral deposits well developed.

References

  • Sweet, Walter C. 1964. Nautiloidea-Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Soc of America, and Univ Kansas Press.
  • Parakionoceras -Paleobio db
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