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Jawfish
Opistognathidae, the jawfishes, are a family of fishes which have been classified within the order Perciformes, suborder Percoidei but many authorities now classify this family within the clade Ovalentaria and consider that its affinities within that clade are uncertain, i.e. it is ''incertae sedis''. The family includes about 80 species. They are native to warmer parts of the Atlantic, Pacific and Indian Oceans, where found from the shallows to depths of a few hundred meters. The species level taxonomy is complex and the family includes several undescribed species. Physically similar to blennies, most jawfish species are small fish (up to ) with an elongated body plan. A few species, for example the aptly named giant jawfish (''O. rhomaleus''), reaches about . Their heads, mouths, and eyes are large in size relative to the rest of their bodies. Jawfishes possess a single, long dorsal fin with 9-12 spines and a caudal fin that can be either rounded or pointed. Jawfishes typica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opistognathus Rhomaleus
''Opistognathus'' is a genus of fish in the family Opistognathidae found in the Atlantic, Indian and Pacific Ocean. Species There are currently 68 recognized species in this genus: * ''Opistognathus adelus'' Smith-Vaniz, 2010 (Obscure jawfish) Smith-Vaniz, W.F. (2010): New species of Indo-Pacific jawfishes (''Opistognathus'': Opistognathidae) from the Western Indian Ocean and Red Sea. ''Smithiana Bulletin, 12: 39-54.'' * ''Opistognathus afer'' Smith-Vaniz, 2010 (African jawfish) * ''Opistognathus albicaudatus'' Smith-Vaniz, 2011 (White-tail jawfish) Smith-Vaniz, W.F. (2011)''Opistognathus albicaudatus'', a new species of jawfish (Teleostei: Opistognathidae) from the Andaman Islands.''Zootaxa, 3085: 34–40.'' * ''Opistognathus alleni'' Smith-Vaniz, 2004 (Abrolhos jawfish) * ''Opistognathus annulatus'' ( Eibl-Eibesfeldt & Klausewitz, 1961) * ''Opistognathus aurifrons'' ( D. S. Jordan & J. C. Thompson, 1905) (Yellow-head jawfish) * ''Opistognathus brasiliensis'' Smith-Vaniz, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opistognathus Randalli
''Opistognathus'' is a genus of fish in the family (biology), family Opistognathidae found in the Atlantic Ocean, Atlantic, Indian Ocean, Indian and Pacific Ocean. Species There are currently 68 recognized species in this genus: * ''Opistognathus adelus'' William Farr Smith-Vaniz, Smith-Vaniz, 2010 (Obscure jawfish) Smith-Vaniz, W.F. (2010): New species of Indo-Pacific jawfishes (''Opistognathus'': Opistognathidae) from the Western Indian Ocean and Red Sea. ''Smithiana Bulletin, 12: 39-54.'' * ''Opistognathus afer'' William Farr Smith-Vaniz, Smith-Vaniz, 2010 (African jawfish) * ''Opistognathus albicaudatus'' William Farr Smith-Vaniz, Smith-Vaniz, 2011 (White-tail jawfish) Smith-Vaniz, W.F. (2011)''Opistognathus albicaudatus'', a new species of jawfish (Teleostei: Opistognathidae) from the Andaman Islands.''Zootaxa, 3085: 34–40.'' * ''Opistognathus alleni'' William Farr Smith-Vaniz, Smith-Vaniz, 2004 (Abrolhos jawfish) * ''Opistognathus annulatus'' (Irenäus Eibl-Eibesfeldt, Ei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opistognathus Aurifrons
The yellowhead jawfish (''Opistognathus aurifrons'') is a species of jawfish native to coral reefs in the Caribbean Sea. It is found at depths of from . The head and upper body are a light, but brilliant, yellow color slowly fading to a pearlescent blue hue. It can reach a length of TL. Yellowhead jawfishes are usually found in Florida. They are usually found in shallow areas where materials are available for burrow construction. The Jawfishes live in rubble areas and sand in groups of up to 70 species. It remains near its relatively small territory, and is typically seen with only the head and upper section of its body protruding from its burrow, although it sometimes can be found hovering nearby. It is able to arrange material using its mouth, carrying sand, shells, or small rocks from one location to another. It is a mouthbrooder, with the male carrying the eggs in its mouth until they hatch. Yellowhead jawfish have two different types of responses to intruders. Flight o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anoptoplacus
The pygmy jawfish (''Anoptoplacus pygmaeus'') is a species of ray-finned fish from the family Opistognathidae, the jawfishes. It is the only member of the monospecific genus ''Anoptoplacus'' and the species and genus were described based on two specimens collected at depths of at the Arrowsmith Bank off Yucatan, Mexico. As the name suggests, the pygmy jawfish is a very small species and many of its meristic Meristics is an area of ichthyology and herpetology which relates to counting quantitative features of fish and reptiles, such as the number of fins or scales. A meristic (countable trait) can be used to describe a particular species of fish, or us ... characters are reduced compared to other jawfishes. References {{taxonbar, from=Q60791220 Opistognathidae Fish described in 2017 Taxa named by William Farr Smith-Vaniz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary
The Quaternary ( ) is the current and most recent of the three period (geology), periods of the Cenozoic era (geology), Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today, although a third epoch, the Anthropocene, has been proposed but is not yet officially recognised by the ICS). The Quaternary Period is typically defined by the cyclic growth and decay of continental ice sheets related to the Milankovitch cycles and the associated climate and environmental changes that they caused. Research history In 1759 Giovanni Arduino (geologist), Giovanni Arduino proposed that the geological strata of northern Italy could be divided into four successive formations or "orders" ( it, quattro ord ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neogene
The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period Mya. The Neogene is sub-divided into two epochs, the earlier Miocene and the later Pliocene. Some geologists assert that the Neogene cannot be clearly delineated from the modern geological period, the Quaternary. The term "Neogene" was coined in 1853 by the Austrian palaeontologist Moritz Hörnes (1815–1868). During this period, mammals and birds continued to evolve into modern forms, while other groups of life remained relatively unchanged. The first humans ('' Homo habilis'') appeared in Africa near the end of the period. Some continental movements took place, the most significant event being the connection of North and South America at the Isthmus of Panama, late in the Pliocene. This cut off the warm ocean currents from the Pacific t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleogene
The Paleogene ( ; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (Mya) to the beginning of the Neogene Period Mya. It is the beginning of the Cenozoic Era of the present Phanerozoic Eon. The earlier term Tertiary Period was used to define the span of time now covered by the Paleogene Period and subsequent Neogene Period; despite no longer being recognised as a formal stratigraphic term, 'Tertiary' is still widely found in earth science literature and remains in informal use. Paleogene is often abbreviated "Pg" (but the United States Geological Survey uses the abbreviation PE for the Paleogene on the Survey's geologic maps). During the Paleogene, mammals diversified from relatively small, simple forms into a large group of diverse animals in the wake of the Cretaceous–Paleogene extinction event that ended the preceding C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene has been identified with the current warm period, known as MIS 1. It is considered by some to be an interglacial period within the Pleistocene Epoch, called the Flandrian interglacial.Oxford University Press – Why Geography Matters: More Than Ever (book) – "Holocene Humanity" section https://books.google.com/books?id=7P0_sWIcBNsC The Holocene corresponds with the rapid proliferation, growth and impacts of the human species worldwide, including all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
