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Mioplosus
''Mioplosus'' is an extinct genus of percid fish that lived from the early to middle Eocene. Five species of the genus has been described, ''Mioplosus labracoides'' is found in the Green River Formation Lagerstätte. ''Mioplosus'' has numerous extant relatives in Northern Hemisphere fresh- and brackish water, as well as fossil relatives in Asia, Europe and New Zealand, and may be closely related to the modern-day Pike-perches (genus ''Sander''). ''Mioplosus'' are similar to modern Percids, and like them have two dorsal fins, the anterior dorsal fin spiny and the posterior soft-rayed. Fossil ''Mioplosus'' up to have been found, but anything over is rare. ''Mioplosus'' have pointed teeth and are believed to have been voracious predators, individuals have been found with fish lodged in its throat. ''Mioplosus'' fossils are never found in large groups, which suggest they were solitary. See also * Prehistoric fish * List of prehistoric bony fish * Green River Formation The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percidae
The Percidae are a family of ray-finned fish, part of the order Perciformes, which are found in fresh and brackish waters of the Northern Hemisphere. The majority are Nearctic, but there are also Palearctic species. The family contains more than 200 species in 11 genera. The perches, and their relatives are in this family; well-known species include the walleye, sauger, ruffe, and three species of perch. However, small fish known as darters are also a part of this family. Characteristics The family is characterised by having the dorsal fin split into two which are normally separated or have a narrow connection, although this is wider in the genus ''Zingel'', the front section contains the spines and the rear section contains the soft rays. The anal fin contains 1 or 2 spines, if there is a second spine it is typically weak. The pelvic fins are placed on the thorax and have a single spine and 5 soft rays. They also have skeletal synapomorphies. The maximum size attained in in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |