Watinoceras
| Watinoceras Temporal range: Turonian
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|---|---|
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| W. coloradoense | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Acanthoceratidae |
| Subfamily: | †Acanthoceratinae |
| Genus: | †Watinoceras Warren, 1930 |
| Species | |
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Watinoceras is a genus of acanthoceratid ammonite that lived during the early Turonian stage of the Late Cretaceous.
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. Older classifications included Watinoceras in the subfamily Mammitinae instead.
Species include Watinoceras 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]
- , Angola
- , Brazil
- Mungo River Formation, Cameroon
- Blackstone Formation, Alberta, Canada
- and , British Columbia
- McKenzie River Valley, Northwest Territories
- Mesitas del Colegio and Yaguará, Colombia
- , Germany
- Agua Nueva and Indidura Formations, Mexico
- , Nigeria
- Draa el Miaad, Tunisia
- Mancos Shale, Arizona and New Mexico
- Greenhorn Formation, Colorado and Minnesota
- Colorado Group, Colorado and New Mexico
- , Venezuela
References[]
- ^ 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." (PDF). Episodes. 28 (2): 93–104. Retrieved 16 September 2012.
- ^ "GSSP for Turonian Stage". Geologic Timescale Foundation. Retrieved 7 August 2014.
- ^ Watinoceras at Fossilworks.org
Further reading[]
- W.J. Arkell et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Pat L Mollusca 4. Geological Society of America and University of Kansas Press.
- J. Kennedy et al., 1999. Lower Turonian (Upper Cretaceous) Watinoceras devonense Zone ammonite fauna in Colorado, USA. USGS Publications Warehouse - Citations View
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- Acanthoceratidae
- Ammonitida genera
- Index fossils
- Turonian life
- Late Cretaceous ammonites
- Ammonites of Africa
- Fossils of Angola
- Cretaceous Cameroon
- Fossils of Cameroon
- Cretaceous Nigeria
- Fossils of Nigeria
- Cretaceous Tunisia
- Fossils of Tunisia
- Ammonites of Europe
- Cretaceous Germany
- Fossils of Germany
- Ammonites of North America
- Cretaceous Alberta
- Cretaceous British Columbia
- Cretaceous Northwest Territories
- Fossils of Canada
- Cretaceous Mexico
- Fossils of Mexico
- Cretaceous Arizona
- Cretaceous Colorado
- Cretaceous Minnesota
- Cretaceous geology of New Mexico
- Fossils of the United States
- Ammonites of South America
- Cretaceous Brazil
- Fossils of Brazil
- Cretaceous Colombia
- Fossils of Colombia
- Cretaceous Venezuela
- Fossils of Venezuela
- Fossil taxa described in 1930
- Ammonitina stubs