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Conodonts are extinct agnathan chordates resembling eels, classified in the class Conodonta. For many years, they were known only from tooth-like microfossils found in isolation and now called conodont elements. Knowledge about soft tissues remains limited. The animals are also called Conodontophora to avoid ambiguity.
Promissum is an extinct genus of conodonts, primitive chordates, that lived during the Upper Ordovician period.
Prioniodontida, also known as the "complex conodonts", is a large clade of conodonts that includes two major evolutionary grades; the Prioniodinina and the Ozarkodinina. It includes many of the more famous conodonts, such as the giant ordovician Promissum (Prioniodinina) from the Soom Shale and the Carboniferous specimens from the Granton Shrimp bed (Ozarkodinina). They are euconodonts, in that their elements are composed of two layers; the crown and the basal body, and are assumed to be a clade.
Westergaardodina is a species-rich genus of spine, U or W-shaped paraconodont known from Middle Cambrian to Lower Ordovician strata.
Prioniodinida is an extinct order of conodonts, a kind of primitive chordate.
Parafurnishius is an extinct genus of conodont in the family Ellisoniidae.
Ellisonia is an extinct genus of conodonts in the family Ellisoniidae.
Foliella is an extinct genus of conodonts in the family Ellisoniidae.
Hadrodontina is an extinct genus of conodonts in the family Ellisoniidae.
Iapetognathus is a genus of cordylodan conodonts. It is one of the oldest denticulate euconodont genera known.
Cordylodontidae is a family of conodonts.
Ozarkodina is an extinct genus of conodonts in the family Spathognathodontidae.
Parapachycladina is an extinct genus of conodonts in the family Ellisoniidae, from the Early Triassic of the Beisi Formation in Guangxi Province, China.
Furnishina is an extinct genus of conodonts in the family Furnishinidae from the Cambrian.
Idiognathodus is an extinct conodont genus in the family Idiognathodontidae.
Icriodus is an extinct conodont genus in the family Gnathodontidae.
Alternognathus is an extinct conodont genus in the family Elictognathidae. An extensive study on its population dynamics and lifespan has recently been published.
Epigondolella is an extinct genus of conodonts in the family Gondolellidae.
Gapparodus is an extinct genus of conodonts in the family Furnishinidae. Gapparodus gapparites is a species of the Early Cambrian of Shuijingtuo Formation in China.
Siphonodella is an extinct genus of conodonts.
References
- ↑ Bo Yang, Dong-Xun Yuan, Charles M. Henderson and Shu-Zhong Shen (2014). "Parafurnishius, an Induan (Lower Triassic) conodont new genus from northeastern Sichuan Province, Southwest China and its evolutionary implications". Palaeoworld 23 (3–4): 263–275. doi:10.1016/j.palwor.2014.10.003
