| Diceratias bispinosus | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Lophiiformes |
| Family: | Diceratiidae |
| Genus: | Diceratias |
| Species: | D. bispinosus |
| Binomial name | |
| Diceratias bispinosus Günther, 1887 | |
Diceratias bispinosus, the two-rod angler, is a species of deep sea marine ray-finned fish belonging to the family Diceratiidae, the double anglers. This species is found in the Indo-Pacific region.
Diceratias bispinosus was first formally described in 1887 by the German-born British herpetologist and ichthyologist Albert Günther with its type locality off Banda Island at a depth of 360 fathoms (2,160 ft; 660 m) on the Challenger expedition of 1872-1876. [2] When Günther described this species he proposed the new monospecific genus, Diceratias , so this species is the type species of that genus. [3] The genus Diceratias is one of two genera in the family Diceratiidae which the 5th edition of Fishes of the World classifies within the suborder Ceratioidei within the order Lophiiformes, the anglerfishes. [4]
Diceratias bispinosus is the type species of the genus Diceratias, this name prefixes di, meaning "two" onto the genus name Ceratias. Günther originally proposed Diceratias as a subgenus of Ceratias with two cephalic spines instead of one. The specific name bispinosus means "two spined", an allusion to the two cephalic spines, the second spine being rather rudimentary. [5]
Diceratias bispinosus is sexually dimorphic and the metamorphosed females have the second, club-like exposed cephalic spine bearing a bioluminescent organ at its tip which characterises the family Diceratiidae. In the genus Diceratias the spine is on the snout rather than being located at the back of the head as in Bufoceratias , the forward tip of the illicium's pterygiophore is exposed while in Bufoceratias it is hidden and it has a deep trough it can be retracted into. The spine is shorter than in Bufoceratias having a length equivalent to between 27% and 47% of the standard length. They also have a large mouth which reaches back beyond the eye, a well developed spine on the symphysis of the mandible which reaches just past the maxilla, the presence of vomerine teeth, there are large spines in the skin, [6] [7] the dorsal fin has between five and seven rays while the anal fin has four rays and they have a small pelvic bone which is joined to the cleithrum. The second cephalic spine is positioned directly behind the base of the first cephalic spine, or illicium [4] and can be pulled down beneath the skin in individuals with a total length greater than 1.3 cm (0.51 in) leaving a small pore to show its location. [8] The males have spinules in the skin, they have two teeth on the snout and two transverse rows of 4 or 5 teeth on the lower jaw, all separate from each other. The eyes and nostrils of the males are directed laterally. [9] This is the largest species in the genus Diceratias with a maximum published standard length for a metamorphosed female of 23.5 cm (9.3 in). [10] This species is distinguished from its congeners by the morphology of its esca, which has a low terminal papilla, has a rear appendage with a series of clearly defined filaments running from the tip downwards and may have a branched front appendage. [6]
Diceratias bispinosus is found in the Indo-Pacific region, it has been recorded in the Bay of Bengal as well as Rowley Shoals off Western Australia in the Indian Ocean. In the Western Pacific Ocean it is found from Japan, Taiwan, the Philippines, the Halmahera and Banda Seas to New Ireland in the Bismarck Archipelago. [1] This is a bathypelagic fish which is found at depths between 533 and 2,306 m (1,749 and 7,566 ft). [10]
Ceratiidae, the warty sea devils, caruncled seadevils or seadevils, are a family of marine ray-finned fishes belonging to the suborder Ceratioidei, the deep-sea anglerfishes, in the anglerfish order Lophiiformes. The warty sea devils are sexually dimorphic with the small males being obligate sexual parasites of the much larger females. The fishes in this family are widely distributed from polar to tropical seas around the world.
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.
Double anglers, the family Diceratiidae, is a small and little known family of rarely encountered marine ray-finned fishes belonging to the order Lophiiformes, the anglerfishes. The two genera and seven species of this family are found in the deeper waters of the tropical and subtropical Atlantic, Indian and Pacific Oceans. They are distinguished from other deep sea anglerfishes by the possession of a second bioluminescent cephalic spine. The fishes in this family were known only from metamorphosed females and the males were not described until 1983.
Krøyer's deep sea angler fish, also known as the deep-sea angler, longray seadevil or northern seadevil, is a species of marine ray-finned fish belonging to the family Ceratiidae, the warty seadevils. It is found throughout the oceans of the world, from tropical to polar seas. It is the largest species in its family.
The triplewart seadevil is a species of marine ray-finned fish belonging to the family Ceratiidae, the warty sea devils, and the order Lophiiformes. This species is the only member of its genus. Noted for its extreme sexual dimorphism, the triplewart seadevil's length ranges from 20 to 30 cm for females and 1 to 3 cm for males.
Bertella 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 Bertella idiomorpha and this can be distinguished from other members of the family by the structure of its hyomandibular bone.
The toothed seadevil, spiny seadevil or netbeard seadevil,, is a rarely seen deep-sea anglerfish found in the mesopelagic and bathypelagic zones in Oceans around the World. It is the only species in the family Neoceratidae, and is unique amongst the deep-sea anglerfish in lacking an illicium and esca, and in having large teeth placed on the outside of its jaws.
The anglerfish are fish of the teleost order Lophiiformes. They are bony fish named for their characteristic mode of predation, in which a modified luminescent fin ray acts as a lure for other fish. The luminescence comes from symbiotic bacteria, which are thought to be acquired from seawater, that dwell in and around the sea.
Black seadevils are small, deepsea lophiiform fishes of the family Melanocetidae. The five known species are all within the genus Melanocetus. They are found in tropical to temperate waters of the Atlantic, Indian, and Pacific Oceans, with one species known only from the Ross Sea.
Antennarius is a genus of anglerfish belonging to the family Antennariidae, the frogfishes. The fishes in this genus are found in warmer parts of the Atlantic, Indian and Pacific Oceans.
Bufoceratias is a genus of marine ray-finned fishes belonging to the family Diceratiidae, the double anglers. Thee fishes in this genus are found i the Indian, Pacific and Western Atlantic Oceans.
Bufoceratias wedli is a species of deep sea marine ray-finned fish belonging to the family Diceratiidae, the double anglers. This anglerfish is found in deep water over the continental shelf in the tropical and subtropical areas of the Eastern and Western Atlantic Oceans. It is the type species of the genus Bufoceratias and like other members of that genus is known only from adult females, the unknown males are thought to be free living rather than sexual parasites of the females like those of some other deep sea anglerfishes.
Caulophryne polynema is a species of marine ray-finned fish belonging to the family Caulophrynidae, the fanfins. This species is a deepwater species which is found in the Atlantic and Pacific Oceans. Like other deepwater anglerfishes it shows extreme sexual dimorphism with the males being much smaller than the females and acting as sexual parasites of the females.
Ceratias is a genus of marine ray-finned fish belonging to the family Ceratiidae, the warty sea devils. This fishes in this genus are found throughpuit the world's oceans.
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 strata of Rosedale, California.
Microlophichthys microlophus, the short-rod anglerfish, is a species of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep sea anglerfishes. This anglerfish is found in the deeper waters of the tropical and temperate oceans around the world.
Microlophichthys is a genus of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep sea anglerfishes. The species in this genus are found in the tropical and subtropical parts of the Atlantic, Indian and Pacific Oceans.
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.
