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Ichthyodectiformes
Ichthyodectiformes is an Extinction, extinct order of marine stem-teleost ray-finned fish. The order is named after the genus ''Ichthyodectes'', established by Edward Drinker Cope in 1870. Ichthyodectiforms are usually considered to be some of the closest relatives of the teleost crown group. They were most diverse throughout the Cretaceous period, though basal forms like ''Thrissops, Occithrissops'' and ''Allothrissops'' are known from the Middle-Late Jurassic of Europe and North America. They were almost entirely wiped out by the Cretaceous–Paleogene extinction event, Cretaceous-Paleogene extinction event, but a single species, ''Saurocephalus, Saurocephalus lanciformis'', appears to have survived into the earliest Paleocene (Danian). Most ichthyodectiforms ranged between in length. Most of known taxa were predators, feeding on smaller fish; in several cases, larger ichthyodectiforms preyed on smaller members of the order. Some species had remarkably large teeth, though othe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Cladocyclus
''Cladocyclus'' (derived from the Ancient Greek, Greek κλάδος/kládos ("branch") and κύκλος/kýklos ("circle")) is an extinct genus of marine Ichthyodectiformes, ichthyodectiform ray-finned fish from the middle Cretaceous. It was a predator of about in length. Taxonomy It contains the following species: * †''C. gardneri'' Louis Agassiz, Agassiz, 1841 - Albian of northeastern Brazil (Romualdo Formation, Romualdo and Crato Formations of the Araripe Basin) (=''C. ferus'' Santos, 1950) * †''C. geddesi'' Berell, 2014 - late Albian of Queensland, Australia (Winton Formation) An indeterminate specimen, previously assigned to ''Chirocentrites'', is known from the Albian-aged Pietraroja Plattenkalk of Italy. Indeterminate specimens, represented by complete remains, are also known from the Cenomanian of Morocco, which are not to be confused with ''C. pankowskii'', which was discovered in the Kem Kem Group, Kem Kem Beds in 2007, but has since been reclassified to the g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |