Acentrophryne longidens | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Lophiiformes |
Family: | Linophrynidae |
Genus: | Acentrophryne |
Species: | A. longidens |
Binomial name | |
Acentrophryne longidens Regan, 1926 | |
Acentrophryne longidens is a species of marine ray-finned fish belonging to the family Linophryidae, the leftvents, a family of deep sea anglerfishes. This species is only known from the eastern Pacific Ocean off the coast of Costa Rica and Panama.
Acentrophryne longidens was first formally described in 1926 by the English ichthyologist Charles Tate Regan with its type locality given as 7°30'N, 79°19'W in the Gulf of Panama from a depth of around 1,250 m (4,100 ft), the holotype being collected by the Danish research vessel Dana . [2] When Regan described this species he proposed that it be placed in the new monospecific genus Acentrophryne , making it the type species of that genus by monotypy. [3] The 5th edition of Fishes of the World classifies this genus in the family Linophrynidae, within the suborder Ceratioidei, the deep sea anglerfishes, of the anglerfish order Lophiiformes. [4]
Acentrophryne longidens is one of two species in the genus Acentophryne. This genus is known from the fossil record, as a single specimen was found in 1977 from a Miocene diatomaceous deposit in the Puente Hills of Southern California. This was initially tentatively identified as being 'this species but its identity is now left open as Acentrophryne sp. as it was somewhat intermediate between this species and Acentrophryne dolichonema . Acentrophryne leftvents are endemic to the eastern Pacific and are adapted to low oxygen environments. The fossil specimen from California suggests that this genus originated in the Miocene and that hypoxic environments were more widespread in the eastern Pacific, as these reduced the genus underwent a contraction in its distribution and subsequent allopatric speciation. [5]
Acentrophryne longidens belongs to the genus Acentophryne, a name that prefixes a, meaning "without", to kentron, meaning "spine", a reference to the lack of a spine on the preoperculum. This is then suffixed with phryne, which means "toad", commonly used in the names of anglerfish genera. Its use may date as far back as Aristotle and Cicero, who referred to anglerfishes as "fishing-frogs" and "sea-frogs", respectively, possibly because of their resemblance to frogs and toads. The specific name, longidens, means "long teeth" an allusion to the long and robust teeth in both jaws of this species. [6]
Acentrophryne longidens has 3 soft rays in both the dorsal and anal fin. This species is known only from metamorphosed females and these are distinguished from the metamorphosed females of A. dolichonema by the possession of a shorterer appendage on the tip of the esca, this having a length equivalent to 2.3-2.5% of the standard length as opposed to 27.6% to 35.7% in A. dolichonema, and a shorter illicium, which has a length equivalent to between 35.7% and 54,9% of the standard length conmpared to 63.6% to 70.5% in A. dolichonema. They also have a broader head and more fin rays in the pectoral fin, 18 or 19 compared to 16 for A. dolichonema. This species has a maximum published standrad length of 5 cm (2.0 in). [7]
Acentrophryne longidens is known from two specimens which were collected from two separate localities in the Eastern Pacific Ocean, in the Gulf of Panama and south of Cabo Blanco in Costa Rica. Both specimens were collected at depths between 1,250 and 1,280 m (4,100 and 4,200 ft). [1]
Leftvents are a family, the Linophrynidae, of marine ray-finned fishes which is classified within the suborder Ceratioidei, the deep sea anglerfishes. These fishes are found in the Atlantic, Indian and Pacific Oceans.
The footballfish form a family, Himantolophidae, of globose, deep-sea anglerfishes found in tropical and subtropical waters of the Atlantic, Indian, and Pacific Ocean. The family contains 23 species, all of which are classified in a single genus, Himantolophus.
Photocorynus is a monospecific genus of marine ray-finned fish belonging to the family Linophrynidae, the leftvents. The only species in the genus is Photocorynus spiniceps.
Fanfins or hairy anglerfish are a family, Caulophrynidae, of marine ray-finned fishes within the order Lophiiformes, the anglerfishes. The fishes in this family are found almost around the world in the deeper, aphotic waters of the oceans.
Haplophryne mollis, the ghostly seadevil or soft leftvent angler, is a species of anglerfish in the family Linophrynidae and is the only species in the genus Haplophryne. It is found in the bathypelagic and mesopelagic zones of tropical and subtropical parts of the world's oceans at depths down to about 2,250 m (7,400 ft).
Tyrannophryne is a monospecific genus of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep-sea anglerfishes. The only species in the genus is Tyrannophryne pugnax, the tyrant devil. Like other oneirodids, T. pugnax is a bathypelagic fish with a bioluminescent lure. It is known only from two adolescent female specimens, one caught in 1928 near Tahiti-Rarotonga, and the other in 1956 northwest of Bikini Atoll.
Diceratias is a genus of deep sea marine ray-finned fish belonging to the family Diceratiidae, the double anglers. These fishes are found in the Eastern Atlantic and Indo-Pacific regions.
Acentrophryne is a genus of deep-sea anglerfish in the family Linophrynidae, the leftvents, known from the eastern Pacific Ocean. Fossils of the type species, A. longidens, have been found in Late Miocene-aged Puente Formation of Rosedale, California.
Borophryne apogon, the netdevil or greedy seadevil, is a species of leftvent anglerfish known today from the waters of the eastern Pacific Ocean off the Central American coast. It is found at depths down to around 1,750 m (5,700 ft). This species grows to a length of 8.3 centimetres (3.3 in) TL. A fossil specimen of this species has been found in the Los Angeles Basin dating back to the Late Miocene, some eight million years ago.
Linophryne, the bearded seadevils, is a genus of marine ray-finned fishes belonging to the family Linophrynidae, the leftvents. These deep sea anglerfishes are found in the Atlantic, Indian and Pacific Oceans.
Chaenophryne is a genus of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep-sea anglerfishes. These predatory, deep-sea fishes are found in the tropical and subtropical oceans around the world. Like other deep-sea anglerfishes, they are sexually dimorphic, with the matamorphosed females dwarfing the metamorphosed males. The males are not sexual parasites.
Danaphryne is a monospecific genus of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep sea anglerfishes. The only species in the genus is Danaphryne nigrifilis which is found in the tropical and temperate regions of all of the world's oceans.
Puck pinnata, the mischievous dreamer, is a species of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep-sea anglerfishes. This species is known from four metamorphosed female specimens each collected from four separate locations, three in the Pacific Ocean and one in the Atlantic Ocean. As with all other species in the family, it is a pelagic, deep-water fish that is a member of the abyssal ecosystem. It is the only known species in the monospecific genus Puck.
Linophryne algibarbata is a species of marine ray-finned fish beloning to the family Linophrynidae, the leftvents. This fish occurs im the North Atlantic Ocean.
Caulophryne bacescui of marine ray-finned fishes belonging to the family Caulophrynidae, the fanfins or hairy anglerfishes. It is known from a single specimen collected from the Eastern Pacific Ocean.
Ceratias uranoscopus, the stargazing seadevil, is a species of marine ray-finned fish belonging to the family Ceratiidae, the warty sea devils. The fish is both bathypelagic and mesopelagic and can typically be found at depths ranging from 500 to 1,000 metres. It is endemic to tropical waters and can be found in the Atlantic, Pacific, and Indian Oceans.
Linophryne macrodon is a species of marine ray-finned fish belonging to the family Linophrynidae, the leftvents, a group of deep water anglerfishes., that live in waters 300 to 1000 m deep in theeastern pacific and western Atlantic Oceans.
Acentrophryne dolichonema is a species of marine ray-finned fish belonging to the family Linophrynidae, the leftvents, a family of deep sea anglerfishes. This species is only known from the eastern Pacific Ocean off the coast of Peru.
Ceratioidei, the deep-sea anglerfishes or pelagic anglerfishes, is a suborder of marine ray-finned fishes, one of four suborders in the order Lophiiformes, the anglerfishes. These fishes are found in tropical and temperate seas throughout the world. One of the better known traits of the deep-sea anglerfishes is their extreme sexual dimorphism where the males are many times smaller than the females, the males seek out females and use their sharp teeth to clamp onto the females where he remains for the rest of his life, in some species he becomes part of the female. This is the only known natural example of a process called parabiosis. Another common trait of deep-sea anglerfishes is that they use bioluminescence on their esca to attract prey in the darkness of the deep oceans they inhabit.
Chaenophryne melanorhabdus is a species of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep-sea anglerfishes. This predatory, deep-sea fish is found in the Pacific Ocean. Like other deep-sea anglerfishes, dreamers are sexually dimorphic, with the matamorphosed females dwarfing the metamorphosed males. The males are not sexual parasites.