(J. Richardson, 1845)
The thornback skate (Dentiraja lemprieri) is a species of skate of the family Rajidae. A bottom-dwelling fish, it is endemic to Australia, occurring in relatively shallow waters from near-shore to 170 metres. cm long.The thornback skate can grow up to 52
Skates are cartilaginous fish belonging to the family Rajidae in the superorder Batoidea of rays. More than 150 species have been described, in 17 genera. Softnose skates and pygmy skates were previously treated as subfamilies of Rajidae, but are now considered as distinct families. Alternatively, the name "skate" is used to refer to the entire order of Rajiformes.
Myliobatiformes is one of the four orders of batoids, cartilaginous fishes related to sharks. They were formerly included in the order Rajiformes, but more recent phylogenetic studies have shown the myliobatiforms to be a monophyletic group, and its more derived members evolved their highly flattened shapes independently of the skates.
The Cottidae are a family of fish in the superfamily Cottoidea, the sculpins. It is the largest sculpin family, with about 275 species in 70 genera. They are referred to simply as cottids to avoid confusion with sculpins of other families.
Stichocotyle is a monospecific genus of trematodes, in the monospecific family Stichocotylidae, which is itself in the monotypic order Stichocotylida. It comprises the single species Stichocotyle nephropis, which is an internal parasite of elasmobranch fishes. It was originally described from the Norway lobster, Nephrops norvegicus, by J. T. Cunningham in 1884. This flatworm is distinguished by a single ventral row of well separated suckers.
Thornback may refer to:
Dipturus is a large genus of skates native to the Pacific, Atlantic, and Indian Oceans. They were formerly included in Raja. Some species initially moved to Dipturus were later placed in Dentiraja, Spiniraja, and Zearaja.
Raja is a genus of skates in the family Rajidae containing 16 species. Formerly a wastebasket genus, many species historically placed here have been moved to other genera in the family, such as Amblyraja, Beringraja, Dipturus, Leucoraja and Rostroraja. Raja are flat-bodied, cartilaginous fish with a rhombic shapes due to their large pectoral fins extending from or nearly from the snouts to the bases of their tails. Their sharp snouts are produced by a cranial projection of rostral cartilage. The mouth and gills are located on underside of the body. They may be either solid-coloured or patterned, and most skates have spiny or thorn-like structures on the upper surface, and some species contain weak electrical organs within their tails. Mating typically occurs in the spring and the female lays numerous eggs per clutch which are encapsulated in leathery cases, commonly known as "mermaid’s purses". Species vary in size, ranging from about 40 to 140 cm (1.3–4.6 ft) in length. These bottom-dwellers are active during both day and night, and typically feed on molluscs, crustaceans and fish. Raja skates are found in the East Atlantic, including the Mediterranean, and western Indian Ocean, ranging from relatively shallow water to a depth of 800 m (2,600 ft). Skates and related species have fossil records dating from the Upper Cretaceous period, thus this well adapted species is quite ancient.
The Palawan blue flycatcher is a species of bird in the family Muscicapidae. It is endemic to the Philippines.
The argus skate is a species of fish in the family Rajidae. This small, up to 38 cm (1.25 ft) long, skate is endemic to depths of 135–320 m (443–1,050 ft) in the oceans off northeast Australia. It was formerly included in Dipturus or Raja.
The maugean skate or Port Davey Skate is a species of fish in the Rajidae family. Its natural habitat is estuarine waters. It is endemic to Tasmania, only found in Macquarie Harbour and Bathurst Harbour. The species was discovered in 1988 by Dr Graham Edgar.
The thornback guitarfish is a species of ray in the family Platyrhinidae, and the only member of its genus. Despite its name and appearance, it is more closely related to stingrays than to true guitarfishes of the family Rhinobatidae. This species ranges from Tomales Bay to the Gulf of California, generally in inshore waters no deeper than 6 m (20 ft). It can be found on or buried in sand or mud, or in and near kelp beds. Reaching 91 cm (36 in) in length, the thornback guitarfish has a heart-shaped pectoral fin disc and a long, robust tail bearing two posteriorly positioned dorsal fins and a well-developed caudal fin. The most distinctive traits of this plain-colored ray are the three parallel rows of large, hooked thorns that start from the middle of the back and run onto the tail.
A round skate is a common name that is used for several different species of rays:
The thornback ray, or thornback skate, is a species of ray fish in the family Rajidae.
Batoidea is a superorder of cartilaginous fishes commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces.
Dentiraja is a genus of skates native to the oceans around Australia. Members of this genus usually grow up to a maximum of 35 – 70 cm, with the longest being Heald's skate, with a maximum length of about 72 cm.
Paricelinus hopliticus, the Thornback sculpin, is a species of sculpin native to the eastern Pacific Ocean from northern British Columbia, Canada to southern California, United States. It can be found from near the shore to 183 metres (600 ft) deep. This species grows to a length of 20 centimetres (7.9 in) TL. This species is the only known member of its genus.
The biscuit skate or spotted skate is a species of marine fish in the skate family of order Rajiformes. It is native to the eastern Atlantic Ocean.
Lactioria fornasini, the thornback cowfish, is a poisonous species of boxfish found throughout the tropical Indo-Pacific from East Africa to the Bass Islands. It can grow to a maximum length of 23 cm (9 in). It is an uncommon fish that feeds on small invertebrates that it picks up off the sea bed.
William Toby White is an Australian ichthyologist. He studies speciation and biodiversity of shark, ray, and skate species through morphological and molecular systematics.
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