Baltoniodus
| Baltoniodus Temporal range: Dapingian–Sandbian | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Conodonta |
| (unranked): | †Prioniodontida |
| Family: | †Balognathidae |
| Genus: | †Baltoniodus Lindström, 1971[1] |
| Species | |
| |
Baltoniodus is an extinct genus of conodonts.
Use in stratigraphy
The base of the Dapingian, the third stage of the Middle Ordovician, is defined as the first appearance of Baltoniodus triangularis.
The Whiterock Stage refers mainly to the early Middle Ordovician in North America, it is often used in the older literature in a global sense. The Whiterock Stage is given a range from 471.8 (ca. 472) to 462 m.y.a., spanning close to 10 million years. Officially its start is defined by the potentially lowest occurrence of the conodont Protoprioniodus aranda or Baltoniodus triangularis.
B. gerdae has been found in the early Sandbian Bromide Formation, in Oklahoma, USA.
References
- ↑ Vom Anfang, Hochstand und Ende eines Epikontinentalmeeres. Maurits Lindström, Geologische Rundschau, March 1971, Volume 60, Issue 2, pages 419-438, doi:10.1007/BF02000464
External links
- Baltoniodus at fossilworks.org (retrieved 1 July 2016)
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