Watinoceras_coloradoense

<i>Watinoceras</i>

Watinoceras

Genus of molluscs (fossil)

Not to be confused with Wutinoceras.

Watinoceras is a genus of acanthoceratid ammonite that lived during the early Turonian stage of the Late Cretaceous.

Quick Facts Scientific classification, Species ...

Description

Early whorls are compressed, finely ribbed with inner and outer ventrolateral and siphonal tubercles as in Neocardioceras, but siphonal row is soon lost. Later the venter may be concave between rows of ventrolateral clavi or rounded with ribs passing over in chevrons. Ornament usually becomes coarser with age. Derivation is from Neocardioceras, Watinoceras and Mammites gave rise to the other genera in the subfamily Acanthoceratinae. Older classifications included Watinoceras in the subfamily Mammitinae instead.

Species include W. coloradoense, W. reesidei, and W. thompsonense.

Biostratigraphic significance

The first occurrence of the species Watinoceras devonense marks the beginning of the Turonian.[1][2]

Distribution

Fossils of the genus have been found in:[3]

References

  1. [1]
    Kennedy, W. J.; I. Walaszczyk; W. A. Cobban (2005). "The Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous: Pueblo, Colorado, U.S.A." Episodes. 28 (2): 93–104. doi:10.18814/epiiugs/2005/v28i2/003. Retrieved 2023-12-19.
  2. [2]
    "GSSP for Turonian Stage". Geologic Timescale Foundation. Retrieved 7 August 2014.
  3. [3]
    Watinoceras Archived 2023-08-28 at the Wayback Machine at Fossilworks.org

Further reading

Stub icon

This Ammonitina-related article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Watinoceras_coloradoense, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.