| Ozarkodina | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | † Conodonta |
| Order: | † Ozarkodinida |
| Family: | † Spathognathodontidae |
| Genus: | † Ozarkodina Branson and Mehl 1933 [1] |
| Species | |
| |
Ozarkodina is an extinct genus of conodonts in the family Spathognathodontidae.
Ozarkodina snajdri forms a subdivision of the Pseudomonoclimacis latilobus graptolite zone in the Burgsvik beds Silurian formation in Sweden. [2] An Ozarkodina snajdri crispa zone has also been identified in the Wills Creek in Virginia. [3]
Ozarkodina derenjalensis is found in the Silurian of the Niur Formation in Iran. [4]
The Kellwasser event in the Devonian which saw the extinction of all Ozarkodina species is reported in the list of Global Boundary Stratotype Sections and Points.
Conodonts are an extinct group of agnathan (jawless) vertebrates resembling eels, classified in the class Conodonta. For many years, they were known only from their tooth-like oral elements, which are usually found in isolation and are now called conodont elements. Knowledge about soft tissues remains limited. They existed in the world's oceans for over 300 million years, from the Cambrian to the beginning of the Jurassic. Conodont elements are widely used as index fossils, fossils used to define and identify geological periods.
In the geologic timescale, the Telychian is the third and final age of the Llandovery Epoch of the Silurian Period of the Paleozoic Era of the Phanerozoic Eon. The Telychian Age was between 438.5 ± 1.2 million years ago (Ma) and 433.4 ± 0.8 Ma. The Telychian Age succeeds the Aeronian Age and precedes the Sheinwoodian Age. The name of the interval is derived from the Pen-lan-Telych Farm near Llandovery, Powys, Wales. The GSSP is located within the Wormwood Formation.
In the geological timescale, the Llandovery Epoch occurred at the beginning of the Silurian Period. The Llandoverian Epoch follows the massive Ordovician-Silurian extinction events, which led to a large decrease in biodiversity and an opening up of ecosystems.
The Burgsvik Beds are a sequence of shallow marine limestones and sandstones found near the locality of Burgsvik in the southern part of Gotland, Sweden. The beds were deposited in the Upper Silurian period, around 420 million years ago, in warm, equatorial waters frequently ravaged by storms, in front of an advancing shoreline. The Burgsvik Formation comprises two members, the Burgsvik Sandstone and the Burgsvik Oolite.
Wills Creek Formation is a mapped Silurian bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia.
The Devonian Old Port Formation is a mapped bedrock unit in Pennsylvania, USA. Details of the type section and of stratigraphic nomenclature for this unit as used by the U.S. Geological Survey are available on-line at the National Geologic Map Database. Current nomenclature usage by U.S. Geological Survey restricts the name Old Port Formation to Pennsylvania, but correlative units are present in adjacent states.
The Late Silurian to Early Devonian Keyser Formation is a mapped limestone bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia.
Cordylodontidae is a family of conodonts.
Edwin Bayer Branson was an American geologist and paleontologist. He was a professor of geology at the University of Missouri for 37 years.
Wurmiella is an extinct conodont genus.
Spathognathodontidae is an extinct conodont family ranging from the Silurian to the Devonian.
George Jennings Hinde was a British geologist and paleontologist.
Palmatolepis is an extinct conodont genus in the family Palmatolepidae. It was the most abundant genus of conodonts of the Late Devonian, disappearing during the Devonian/Carboniferous crisis.
Anticostiodus is an extinct genus of multielement conodonts. Specimens have been described from the Lower Silurian of Gun River Formation of Anticosti Island, Quebec. Two species are included under the genus, Anticostiodus fahraeusi and Anticostiodus boltoni. Both species occur near the base of the Distomodus staurognathoides zone and in an open subtidal environment.
Distomodus is an extinct genus of conodonts.
Arianagnathus is an extinct genus of conodonts, possibly in the family Balognathidae. The type species A. jafariani is from the Silurian Niur Formation in Iran.
Kallidontus is an extinct genus of conodonts.
Pterospathodus is an extinct genus of conodont from the Silurian period.
Conodonts are an extinct class of animals whose feeding apparatuses called teeth or elements are common microfossils found in strata dating from the Stage 10 of the Furongian, the fourth and final series of the Cambrian, to the Rhaetian stage of the Late Triassic. These elements can be used alternatively to or in correlation with other types of fossils in the subfield of the stratigraphy named biostratigraphy.
Siphonodella is an extinct genus of conodonts.
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