| Prioniodus Temporal range: | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | † Conodonta |
| Clade: | † Prioniodontida |
| Family: | † Balognathidae |
| Genus: | † Prioniodus Pander 1856 [1] |
| Species | |
| |
Prioniodus is an extinct genus of conodonts in the family Balognathidae from the Ordovician. [2] [3]
Prioniodus elegans is from the Ordovician of Baltoscandia. [2]
Conodonts are an extinct group of jawless vertebrates, classified in the class Conodonta. They are primarily known from their hard, mineralised tooth-like structures called "conodont elements" that in life were present in the oral cavity and used to process food. Rare soft tissue remains suggest that they had elongate eel-like bodies with large eyes. Conodonts were a long-lasting group with over 300 million years of existence from the Cambrian to the beginning of the Jurassic. Conodont elements are highly distinctive to particular species and are widely used in biostratigraphy as indicative of particular periods of geological time.
Promissum is an extinct genus of conodonts, primitive chordates, that lived during the Upper Ordovician period.
The Floian is the second stage of the Ordovician Period. It succeeds the Tremadocian with which it forms the Lower Ordovician series. It precedes the Dapingian Stage of the Middle Ordovician. The Floian extended from 477.1 to 471.3 million years ago. The lower boundary is defined as the first appearance of the graptolite species Tetragraptus approximatus.
The Dapingian is the third stage of the Ordovician system and the first stage of the Middle Ordovician series. It is preceded by the Floian and succeeded by the Darriwilian. The base of the Dapingian is defined as the first appearance of the conodont species Baltoniodus triangularis which happened about 471.3 million years ago. The Dapingian lasted for about 1.9 million years until about 469.4 million years ago.
The Kimmswick Limestone is an Ordovician geologic formation in Arkansas, Illinois and Missouri. Fossils occurring in the Kimmswick include corals, bryozoans, brachiopods, conodonts, trilobites, crinoids and mollusks.
Cornuodus is an extinct genus of conodonts.
Acodus is an extinct genus of conodonts.
Willi Ziegler was a German paleontologist.
Balognathidae is an extinct conodont family.
Paracordylodus is an extinct genus of conodonts in the clade Prioniodontida, also known as the "complex conodonts". The species P. gracilis has been recovered from the chert of the Narooma terrane, a geological structural region on the south coast of New South Wales, Australia.
Gnathodus is an extinct conodont genus in the family Idiognathodontidae.
Klaus Jürgen Müller was a German paleontologist, most famous for the discovery of Orsten-type preservation.
Walter C. Sweet was an American paleontologist.
Stig M. Bergström is a Swedish-American paleontologist.
Appalachignathus is a genus of multielement conodonts from the Middle Ordovician of North America.
William Madison Furnish was an American paleontologist. He taught at the University of Iowa.
Raymond Lindsay Ethington is an American paleontologist. He works in the Geology department at the University of Missouri in Columbia, Missouri
Cordylodus is an extinct genus of conodonts in the family Cordylodontidae.
Microzarkodina is an extinct genus of conodonts mainly from the Middle Ordovician of Baltoscandia. The Microzarkodina apparatus probably consisted of 15 or 17 elements: four P, two or four M and nine S elements. The S elements include different Sa, Sb1, Sb2, and Sc element types.
Histiodella is an extinct genus of conodonts.
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