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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.
Valentia may refer to:
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.
Prioniodinida is an extinct order of conodonts, a kind of primitive chordate.
Doliognathus is an extinct genus of conodonts in the family Bactrognathidae from the Middle Dinantian. It is a genus of multielement conodonts.
Cordylodontidae is a family of conodonts.
Palmatolepidae is an extinct conodont family. It is part of the clade Prioniodontida, also known as the "complex conodonts".
Ozarkodina is an extinct genus of conodonts in the family Spathognathodontidae.
Spathognathodus is an extinct conodont genus in the family Spathognathodontidae. It is a non-Platform conodont, from the Pennsylvanian (Caboniferous).
Balognathidae is an extinct conodont family.
Idiognathodus is an extinct conodont genus in the family Idiognathodontidae.
Gnathodus 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.
Clarkina is an extinct genus of conodonts. It is considered to be an offshore, outer shelf or basinal, deep-water taxon.
Gondolella is an extinct genus of conodonts in the family Gondolellidae.
Epigondolella is an extinct genus of conodonts in the family Gondolellidae.
Scotlandia is an extinct genus of conodonts in the family Prioniodinidae.
Chirodella is an extinct genus of conodonts in the family Prioniodinidae.
Oulodus is a genus of conodonts in the family Prioniodinidae.
References
- ↑ Classification and stratigraphic use of the conodonts. Ray S Bassler, Geological Society of America Bulletin, 1925, volume 36, issue 11, pages 218-220
- Novyy ranneordovikskiy rod konodontov semeystva Prioniodinidae (A new Early Ordovician conodont genus of the family Prionidinidae). SP Sergeeva, Paläontologische Zeitschrift, 1963
