Eubostrychoceras

Eubostrychoceras
Temporal range: Turonian–Campanian[1]
Fossil of Eubostrychoceras japonicum from Japan. Late Cretaceous. Exhibit in the National Museum of Nature and Science, Tokyo, Japan.
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Order: Ancyloceratida
Superfamily: Turrilitaceae
Family: Nostoceratidae
Genus: Eubostrychoceras
Matsumoto, 1967
Species [2]
  • E. indopacificum

Eubostrychoceras is a genus of helically wound, corkscew form, heteromorph ammonite which lived during the Upper Cretaceous (M Turonian - Campanian).[1] The genus is included in the ancycleratid family Nostoceratidae.

The shell of Eubostrychoceras is a loosely to tightly wound spiral forming a corkscrew with an open, empty umbilicus in the middle. coiling is commonly dextral (right hand). Coils are covered by moderately strong, straight transverse ribs. The aperture, or apertural end, reverses general direction and points upwards or back towards to apex. Sutures are moderately complex. The siphuncle is located mid flank.

Eubostrychoceras has a widespread distribution in the Upper Createous and has been found in Antarctica, Japan, Spain, the far east of Russia, Alaska, U.S. western interior, Madagascar, Germany, and Madagascar.[3] In 2001 it was reported from Alaska's Matanuska Formation as well. E. japonicum is Turonian, and likely confined to the middle Turonian.[3]

Related genera include Anaklinoceras, Bostychocdras, Didymoceras, and Nostoceras

References

Notes
  1. 1 2 Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. "Paleobiology Database - Eubostrychoceras". Retrieved 2014-05-28.
  3. 1 2 Anne D. Pasch & Kevin C. May (2001). "Taphonomy and paleoenvironment of hadrosaur (Dinosauria) from the Matanuska Formation (Turonian) in South-Central Alaska". In Darren H. Tanke, Kenneth Carpenter, & Michael William Skrepnick. Mesozoic Vertebrate Life. Indiana University Press. pp. 219–236. ISBN 978-0-253-33907-2.
Bibliography
We Links

External links

Wikimedia Commons has media related to Eubostrychoceras.
This article is issued from Wikipedia - version of the Tuesday, November 17, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.