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Zeiformes
The Zeiformes are a small order of exclusively marine ray-finned fishes most notable for the dories, a group of common food fish. The order consists of about 33 species in six extant families, mostly deep-sea types. The boarfishes ( Caproidae) have been previously included in this order though they are currently included in the Perciformes. Zeiform bodies are usually thin and deep. Mouths are large, with distensible jaws, and there is no orbitosphenoid. Pelvic fins have 5–10 soft rays and possibly a spine, 5–10 dorsal fin spines and up to 4 anal fin spines. They range in size from the dwarf dory ''(Macrurocyttus acanthopodus)'', at in length, to the Cape dory ''(Zeus capensis)'', which measures up to . The earliest known member of the order is '' Cretazeus'' from the Late Cretaceous (late Campanian or early Maastrichtian) of Nardò, Italy. Uniquely, despite its age, ''Cretazeus'' is thought to be a derived crown-group zeiform closely related to the Parazenidae (in con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretazeus
''Cretazeus'' is an extinct genus of marine Zeiformes, zeiform fish from the Late Cretaceous. It contains a single species, ''Cretazeus rinaldii'' from the late Campanian or early Maastrichtian age of Nardò, Italy. It is the oldest known zeiform fish, and is alternatively considered the only member of the family Cretazeidae or the most basal member of the family Parazenidae. Uniquely, despite its age, ''Cretazeus'' is considered a Derived (phylogenetics), derived zeiform nested within the order's crown group, as the sister to the Parazenidae; many other lineages of both extant and fossil zeiforms are more Basal (phylogenetics), basal than ''Cretazeus'', despite only appearing later in the geological record. This suggests that several lineages of zeiforms were present during the Late Cretaceous and survived the Cretaceous–Paleogene extinction event, Cretaceous–Paleogene extinction, with several surviving to the present day, despite this not being preserved in the fossil record ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |