Scaliognathus

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Scaliognathus
Temporal range: Tournaisian
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Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class:†Conodonta
Order:†Ozarkodinida
Genus:†Scaliognathus
Branson & Mehl, 1941
Species
  • †Scaliognathus anchoralis

Scaliognathus is an extinct genus of conodonts. [1] [2]

The Tournaisian, the oldest age of the Mississippian contains eight conodont biozones, one of which is the zone of Gnathodus pseudosemiglaber and Scaliognathus anchoralis.

The Tournaisian is in the ICS geologic timescale the lowest stage or oldest age of the Mississippian, the oldest subsystem of the Carboniferous. The Tournaisian age lasted from 358.9 Ma to 346.7 Ma. It is preceded by the Famennian and is followed by the Viséan.

The Mississippian is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earliest/lowermost of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi River valley.

<i>Gnathodus</i> genus of conodonts

Gnathodus is an extinct conodont genus in the family Idiognathodontidae.

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Maurice Goldsmith Mehl was an American paleontologist. A longtime professor in the Department of Geology at the University of Missouri, Mehl was a founding member and officer of the American Association of Petroleum Geologists. Mehl was a fellow of the Geological Society of America (1922), the Paleontological Society, and the American Association for the Advancement of Science.

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Edward B. Branson was an American geologist and paleontologist. He worked at the University of Missouri.

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<i>Polygnathus</i> genus of conodonts

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References

  1. ↑ The origin and evolution of the middle Dinantian conodont genera Doliognathus, Dollymae, Scaliognathus, and Staurognathus, and related forms. Ronald L. Austin and Eric Groessens, Annales de la Société géologique de Belgique [En ligne], Volume 95 (1972), Fascicule 2, 229 - 238 (URL, retrieved 24 April 2016)
  2. ↑ Taxonomy and phylogeny of Scaliognathus Branson & Mehl, 1941 (Conodonta, Lower Carboniferous). HR Lane and W Ziegler, Senckenbergiana lethaea, 1983
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