Baltoniodus
| Baltoniodus Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Conodonta |
| Family: | †Balognathidae |
| Genus: | †Baltoniodus Lindström, 1971[1] |
| Species | |
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Baltoniodus is an extinct genus of conodonts.
Use in stratigraphy
[edit]The base of the Dapingian, the first stage of the Middle Ordovician, is defined as the first appearance of Baltoniodus triangularis.[2]
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
[edit]- ^ Vom Anfang, Hochstand und Ende eines Epikontinentalmeeres. Maurits Lindström, Geologische Rundschau, March 1971, Volume 60, Issue 2, pages 419-438, doi:10.1007/BF02000464
- ^ David A. T. Harper; Tõnu Meidla; Thomas Servais (May 10, 2023). "A short history of the Ordovician System: from overlapping unit stratotypes to global stratotype sections and points". Geological Society, London, Special Publications. 532 (1). The Geological Society of London: 13–30. Bibcode:2023GSLSP.532..285H. doi:10.1144/SP532-2022-285. Archived from the original on 2024-05-18.
External links
[edit]- "Baltoniodus". Paleobiology Database. Retrieved 1 July 2016.
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