| Ozarkodinida | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | † Conodonta |
| Clade: | † Prioniodontida |
| Order: | † Ozarkodinida Dzik 1976 |
| Families | |
| |
| Synonyms | |
Polygnathida Barskov, 1995 | |
Ozarkodinida is an extinct conodont order. [1] [2] It is part of the clade Prioniodontida, also known as the "complex conodonts".
Ozarkodinida is named after the Ozark Mountains of Missouri, United States.
The feeding apparatus of ozarkodinids is composed at the front of an axial Sa element, flanked by two groups of four close-set elongate Sb and Sc elements which were inclined obliquely inwards and forwards. Above these elements lay a pair of arched and inward pointing (makellate) M elements. Behind the S-M array lay transversely oriented and bilaterally opposed (pectiniform, i.e. comb-shaped) Pb and Pa elements. [3]
Conodonts are an extinct group of eel-looking agnathan (jawless) vertebrates, classified in the class Conodonta. For many years, they were known only from fossils of their spiky oral elements, which are usually found in isolation and are now called conodont elements, while knowledge about soft tissues remains limited. A resilient group of prehistoric fish, conodonts existed in the world's oceans for over 300 million years, from the Cambrian to the beginning of the Jurassic. Due to their cosmopolitan distribution, conodont elements are widely used as index fossils, fossils used to define and identify geological periods.
Mark Andrew Purnell is a British palaeontologist, Professor of Palaeobiology at the University of Leicester.
Plectronoceras is the earliest known shelled cephalopod, dating to the Late Cambrian. None of the fossils are complete, and none show the apex or aperture of the shell. Approximately half of its shell was filled with septa; 7 were recorded in a 2 centimetres (0.79 in) shell. Its shell contains transverse septa separated by about half a millimetre, with a siphuncle on its concave side. Its morphology matches closely to that hypothesised for the last common ancestor of all cephalopods.
Taphrognathus is an extinct genus of conodonts from the Dinantian.
Velumbrella is a medusoid organism with tentacles known from the Middle Cambrian of Poland, and perhaps related to Rotadiscus; the fossils depict a scleritosed disk with a U-shaped gut. It was originally related to members of the Ediacara biota but is now thought to be related to the paropsonemids.
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.
Multiplacophora is a stem-group of chitons with a number of plates arranged in 7 rows along the body. They date to at least the Upper Cambrian, but two lower Cambrian fossils- Ocruranus and Trachyplax - may extend the range downwards.
Sharovipterygidae is a family of strange gliding archosauromorphs from the mid-Triassic of Eurasia, notable for their short forelimbs and long, wing-like hindlimbs, which supported membranes for gliding. They are represented by Sharovipteryx and Ozimek volans.
Proconodontida is an order of conodonts which originated in the late Cambrian (Furongian) and persisted partly through the Ordovician. The ancestral proconodont, Proconodontus, was one of the earliest euconodonts to appear. Proconodonts are often equated with the broader group Cavidonti, which occupies one side of a basal division in the evolution of early euconodonts in the Cambrian. All other euconodonts occupy Conodonti, the other side of the Cambrian split.
Ozarkodina is an extinct genus of conodonts in the family Spathognathodontidae.
Complexodus is an extinct conodont genus in the family Pterospathodontidae.
Idiognathodus is an extinct conodont genus in the family Idiognathodontidae.
Jerzy Dzik is a Polish paleontologist.
Misikella is an extinct genus of conodonts.
Cryptotaxidae is an extinct family of conodonts in the order Ozarkodinida. It includes the extinct genus Cryptotaxis.
Cryptotaxis is an extinct genus of conodonts in the family Cryptotaxidae from the Famennian.
Protoconodonts are an extinct group of Cambrian animals known from fossilized phosphatic tooth-like structures. They were originally described as an informal group of early conodonts, though more recent studies consider them to be more closely related to chaetognaths.
The conodont feeding apparatus is a series of phosphatic-mineralized elements, resembling a set of “teeth”, which are found lining the oral surface of the conodont animal.
Panderodus Is an extinct genus of jawless fish belonging to the order Conodonta. This genus had a long temporal range, surviving from the middle Ordovician to late Devonian. In 2021, extremely rare body fossils of Panderodus from the Waukesha Biota were described, and it revealed that Panderodus had a more thick body compared to the more slender bodies of more advanced conodonts. It also revealed that this conodont was a macrophagous predator, meaning it went after large prey.
Data related to Ozarkodinida at Wikispecies  | This article about a conodont is a stub. You can help Wikipedia by expanding it. |
