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Hairtail
The cutlassfishes are about 45 species of predatory ray-finned fish in the family Trichiuridae of the order Scombriformes found in seas throughout the world. Fish of this family are long, slender, and generally steely blue or silver in colour, giving rise to their name. They have reduced or absent pelvic and caudal fins, giving them an eel-like appearance, and large fang-like teeth. Some of the species are known as scabbardfishes or hairtails; others are called frostfishes because they appear in late autumn and early winter, around the time of the first frosts. The earliest known remains of cutlassfish are isolated teeth assigned to ''Eutrichiurides'' from the Early Paleocene of Morocco, the United States, and Angola, although their affinities are subject to question. The earliest known body fossil of a cutlassfish is a specimen tentatively assigned to '' Anenchelum'' from the Early Eocene of Italy. Classification This list of species follows FishBase: * Subfamily Aphanopidin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Trichiurus Lepturus
The largehead hairtail (''Trichiurus lepturus'') or beltfish is a member of the cutlassfish family, Trichiuridae. This common to abundant species is found in tropical and temperate oceans throughout the world. The taxonomy is not fully resolved, and the Atlantic, East Pacific and Northwest Pacific populations are also known as Atlantic cutlassfish, Pacific cutlassfish and Japanese cutlassfish, respectively. This predatory, elongated fish supports major fisheries. Appearance Largehead hairtails are silvery steel blue in color, turning silvery gray after death. The fins are generally semi-transparent and may have a yellowish tinge. Largehead hairtails are elongated in shape with a thin pointed tail (they lack a fish tail in the usual form). The eyes are large, and the large mouth contains long pointed fang-like teeth. Largehead hairtails grow to in weight, and in length. Most are only long, although they regularly reach in Australia. Range and habitat Largehead hairtails ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Trichiurus
''Trichiurus'' is a genus of cutlassfishes belonging to the family Trichiuridae. Species Species within this genus include: * ''Trichiurus auriga'', Klunzinger, 1884 (Pearly hairtail) * ''Trichiurus australis'' Chakraborty, Burhanuddin & Yukio Iwatsuki, Iwatsuki, 2005. * ''Trichiurus brevis'', Wang & You, 1992 (Chinese short-tailed hairtail) * ''Trichiurus gangeticus'', Gupta, 1966 (Ganges hairtail) * ''Trichiurus lepturus'', Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758 (Largehead hairtail) * ''Trichiurus margarites'', Li, 1992 * ''Trichiurus nanhaiensis'', Wang & Xu, 1992 * ''Trichiurus nickolensis'', Burhanuddin & Yukio Iwatsuki, Iwatsuki, 2003 (Australian short-tailed hairtail) * ''Trichiurus russelli'', Dutt & Thankam, 1966 (Short-tailed hairtail) Extinct species Extinct species within this genus include: * ''Trichiurus oshoshunensis'' Casier 1958 Extinct species lived from the Eocene epoch to the Quaternary period, approximately from 48.6 to 0.012 millio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Lepturacanthus
Lepturacanthus is a genus of cutlassfish from the Indo-Pacific region. They are benthopelagic species of waters over the continental shelf, it is a predator of a variety of small coastal fishes, squid A squid (: squid) is a mollusc with an elongated soft body, large eyes, eight cephalopod limb, arms, and two tentacles in the orders Myopsida, Oegopsida, and Bathyteuthida (though many other molluscs within the broader Neocoleoidea are also ... and crustaceans. Species The following species comprise the genus ''Lepturacanthus'': * '' Lepturacanthus pantului'', (Gupta, 1966) (Coromandel hairtail) * '' Lepturacanthus roelandti'' ( Bleeker, 1860) * '' Lepturacanthus savala'', ( Cuvier, 1829) (Savalani hairtail) References Trichiuridae Marine fish genera {{Scombroidei-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Eupleurogrammus
''Eupleurogrammus'' is a genus of cutlassfish from the Indo-Pacific region. They are benthopelagic fishes which occur mainly over the continental shelf where they move upwards in the water column towards the surface at night and feed on small fishes, squid and crustaceans. They have very elongated and highly compressed bodies which tapers towards a posterior point. Species There are two species in the genus ''Eupleorogrammus'': * '' Eupleurogrammus glossodon'', ( Bleeker, 1860) (Longtooth hairtail) * '' Eupleurogrammus muticus'', (Gray Grey (more frequent in British English) or gray (more frequent in American English) is an intermediate color between black and white. It is a neutral or achromatic color, meaning that it has no chroma. It is the color of a cloud-covered s ..., 1831) (Smallhead hairtail) References Trichiuridae Marine fish genera {{Scombroidei-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Tentoriceps
''Tentoriceps'' is a monotypic genus of cutlassfish, family Trichiuridae, from the Indian and Pacific Oceans. The sole species is ''Tentoriceps cristatus''. Its common name is crested hairtail. Distribution ''Tentoriceps cristatus'' has Indo-West Pacific distribution: it is found in the Indian Ocean (including the Red Sea) and in the Western Pacific Ocean, between the Tasman Sea and southern Japan. It is a benthopelagic to pelagic The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the sur ... species that occurs in coastal waters deep, but avoids areas of low salinity. Description Typical for cutlassfishes, ''Tentoriceps cristatus'' has extremely elongate and strongly compressed, ribbon-like body, tapering to a point. The dorsal profile of head is evenly convex. It grows to a maximum length ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Scombriformes
Scombriformes, also known as Pelagia and Pelagiaria, is an order of ray-finned fish within the clade Percomorpha. It contains 287 extant species in 16 families, most of which were previously classified under the suborders Scombroidei and Stromateoidei of the order Perciformes. The earliest known scombriform is the scombrid '' Landanichthys'' from the Middle Paleocene of Angola. Taxonomy Scombriformes includes the following families: * Suborder Stromateoidei ** Family Amarsipidae (amarsipa) ** Family Centrolophidae (medusafishes) ** Family Nomeidae (driftfishes) ** Family Tetragonuridae (squaretails) ** Family Ariommatidae (ariommas) ** Family Stromateidae (butterfishes) * Suborder Scombroidei ** Family Pomatomidae (bluefishes) ** Family Icosteidae (ragfish) ** Family Arripidae (Australasian salmon (kahawai)) ** Family Chiasmodontidae (swallowers) ** Family Scombridae *** Subfamily Gasterochismatinae (butterfly kingfish) *** Subfamily Scombrinae (mackerels, bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Demissolinea
The New Guinea hairtail (''Demissolinea novaeguineensis'') is a species of cutlassfish which is classified in the monotypic genus ''Demissolinea''. It is known only from the type location Dolak Island Kolepom Island or Pulau Yos Sudarso is an island separated by the narrow Muli Strait from the main island of New Guinea. It is part of the Merauke Regency, in the Indonesian province of South Papua. The island is leaf-shaped, about long with an a ... off southwestern New Guinea. References Trichiuridae Fish described in 2003 {{Scombroidei-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Pelvic Fin
Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hindlimbs of tetrapods, which evolved from lobe-finned fish during the Middle Devonian. Structure and function Structure In actinopterygians, the pelvic fin consists of two endochondrally-derived bony girdles attached to bony radials. Dermal fin rays ( lepidotrichia) are positioned distally from the radials. There are three pairs of muscles each on the dorsal and ventral side of the pelvic fin girdle that abduct and adduct the fin from the body. Pelvic fin structures can be extremely specialized in actinopterygians. Gobiids and lumpsuckers modify their pelvic fins into a sucker disk that allow them to adhere to the substrate or climb structures, such as waterfalls. In priapiumfish, males have modified their pelvic structures into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Caudal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish (Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish (Chondrichthyes) and jawless fish (Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are predominan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Danian
The Danian is the oldest age or lowest stage of the Paleocene Epoch or Series, of the Paleogene Period or System, and of the Cenozoic Era or Erathem. The beginning of the Danian (and the end of the preceding Maastrichtian) is at the Cretaceous–Paleogene extinction event . The age ended , being followed by the Selandian. Stratigraphic definitions The Danian was introduced in scientific literature by German-Swiss geologist Pierre Jean Édouard Desor in 1847 following a study of fossils found in France and Denmark.Danien Den Store Danske Encyklopædi He identified this stage in deposits from [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Early Eocene
In the geologic timescale the Ypresian is the oldest age (geology), age or lowest stage (stratigraphy), stratigraphic stage of the Eocene. It spans the time between , is preceded by the Thanetian Age (part of the Paleocene) and is followed by the Eocene Lutetian Age. The Ypresian is consistent with the Lower Eocene (Early Eocene). Events The Ypresian Age begins during the throes of the Paleocene–Eocene Thermal Maximum (PETM). The Fur Formation in Denmark, the Messel shales in Germany, the Oise amber of France and Cambay amber of India are of this age. The Eocene Okanagan Highlands are an uplands subtropical to temperate series of lakes from the Ypresian. The Ypresian is additionally marked by another warming event called the Early Eocene Climatic Optimum (EECO). The EECO is the longest sustained warming event in the Cenozoic record, lasting about 2–3 million years between 53 and 50 Ma. The interval is characterized by low oxygen-18 isotopes, high levels of atmospheric pCO2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
