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Conodonts are an extinct group of agnathan (jawless) Fish resembling eels, classified in the class Conodonta. For many years, they were known only from their tooth-like oral elements found in isolation and now called conodont elements. Knowledge about soft tissues remains limited. They existed in the worlds 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. The animals are also called Conodontophora to avoid ambiguity.
Archeognathus is a fossilized jaw apparatus of a large predatory conodont from the Ordovician period. Its large size has made classification difficult, and it has historically been compared to conodonts and gnathostomes since its remains were first discovered in Missouri. Complete articulated jaw apparatus of Archeognathus primus are common in the Winneshiek Shale lagerstätte of Iowa, allowing its identity as a conodont to be secured.
Edward B. Branson was an American geologist and paleontologist. He worked at the University of Missouri.
Kockelellidae is an extinct conodont family.
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.
Carniodus is a conodont genus from the Silurian.
Pterospathodontidae is an extinct conodont family in the order Ozarkodinida.
Spathognathodus is an extinct conodont genus in the family Spathognathodontidae. It is a non-Platform conodont, from the Pennsylvanian (Carboniferous).
Idiognathodus is an extinct conodont genus in the family Idiognathodontidae.
Icriodus is an extinct conodont genus in the family Gnathodontidae.
Distomodus is an extinct genus of conodonts.
Epigondolella is an extinct genus of conodonts in the family Gondolellidae.
Hertzina is an extinct genus of conodonts in the family Furnishinidae. Fossils can be found in the Wheeler Shale Cambrian fossil locality in Utah, United States.
William Madison Furnish was an American paleontologist. He taught at the University of Iowa.
Prioniodus is an extinct genus of conodonts in the family Balognathidae from the Ordovician.
Acanthodus is an extinct genus of conodonts.
Utahconus is an extinct genus of conodonts.
Wilbert Henry Hass (1906-1959) was an invertebrate paleontologist specializing in the study of conodonts. He joined the Section of Paleontology and Stratigraphy of the United States Geological Survey (USGS) in 1930 when he was appointed Junior Scientific Aid. He was promoted to the rank of Geologist in 1940 and remained with the USGS for the remainder of his life.
Neospathodus is an extinct genus of conodonts.
References
- ↑ Generic and subgeneric homonyms of conodonts. Robert Oran Fay, Journal of Paleontology, 1959
- ↑ Ctenognathodus Fay, 1959 or Spathognathodus Branson & Mehl, 1941? Willi Ziegler, Journal of Paleontology, Vol. 35, No. 6 (Nov., 1961), pages 1236-1238 (Stable URL retrieved 3 May 2016)
