| Okamejei | |
|---|---|
 | |
| Okamejei kenojei | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Superorder: | Batoidea |
| Order: | Rajiformes |
| Family: | Rajidae |
| Genus: | Okamejei Ishiyama, 1958 |
| Type species | |
| Raja fusca Garman, 1885 | |
Okamejei is a genus of small skates in the family Rajidae from the central and western Indo-Pacific, and the north-western Pacific Ocean. [1]
Three species formerly placed in this genus were moved to Orbiraja in 2016. [2] There are currently 14 recognized species in Okamejei: [1]
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.
The Anacanthobatidae, the smooth skates or leg skates, are a family of skates found at depths below 200 m (660 ft) in the Indian, Pacific and Atlantic Oceans.
Anacanthobatis is a genus of smooth skates native to the western Indian Ocean, where found deeper than 200 m (660 ft).
The Pseudotriakidae are a small family of ground sharks, belonging to the order Carcharhiniformes, containing the false catsharks and gollumsharks. It contains the only ground shark species that exhibit intrauterine oophagy, in which developing fetuses are nourished by eggs produced by their mother.
Bathyraja is a large genus of skates in the family Arhynchobatidae.
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.
The black legskate is a species of smooth skate native to the Indian Ocean off of Madagascar and Mozambique. It is the only species in the monotypic genus Indobatis. It inhabits the continental slope at depths of from 1,000 to 1,725 metres. This species can reach a length of 21 centimetres (8.3 in). It is dark-colored, greyish-black or brownish on the dorsum, ventrally lighter.
Bythaelurus is a genus of deep-water catsharks and part of the family Scyliorhinidae. The genus Bythaelurus Compagno 1988 was first described as a subgenus of Halaelurus Gill 1862 based on several morphological characteristics including a soft body with thin skin, a bluntly rounded snout without a pointed, knob-like tip, and eyes not noticeably elevated on the dorsal surface of the head. Members of this genus are generally found in deep water and have more somber body coloration.
Gurgesiella is a genus of fish in the family Gurgesiellidae. These relatively small deep-water skates are found in the Atlantic and Pacific Oceans off South and Central America.
Leucoraja is a genus of hardnose skates in the family Rajidae, commonly known as the rough skates. They occur mostly on continental shelves and slopes in the north-western and eastern Atlantic Ocean, the Mediterranean Sea, the south-western Indian Ocean, and Australia.
Rajella is a genus of skate found deeper than 150 m (490 ft) in the Pacific, Atlantic and Indian oceans.
Rostroraja is a genus of skate belonging to the family Rajidae, native to the Atlantic Ocean and East Pacific, including the Mediterranean, Caribbean, Gulf of Mexico and Gulf of California. The genus was considered monotypic in the past, but a number of species usually classified in Raja have been reassigned to this genus based on genetic analysis.
The ocellate spot skate, also known as the spiny rasp skate or swarthy skate, is a species of skate in the family Rajidae and is commonly found in the north-western Pacific Ocean. O. kenojei is a bottom-feeding carnivore that consumes mainly shrimp, fishes, and crabs. Its diet also includes small quantities of amphipods, mysids, cephalopods, euphausiids, copepods, isopods, and polychaetes.
The dwarf false catshark is a species of ground shark, which lives in the Indian Ocean near Socotra. This species is one of two known members of its genus, the other being the pygmy false catshark off the coast of India, Sri Lanka, and the Maldives. The pygmy false catshark is very closely related to the dwarf false catshark, but has some morphological differences. Two examples are its absence of an oral papillae and that it has more tooth rows in the lower jaw.
Sinobatis is a genus of rays in the family Anacanthobatidae native to deep water in the Indo-Pacific Ocean.
Beringraja is a genus of skates in the family Rajidae with up to six described species. Formerly, they were included in the genus Raja until 2012, when the genus Beringraja was erected for the two species which had multiple embryos per egg capsule. Genetic evidence has led to four additional species being proposed for inclusion in the genus, although this issue has not be completely resolved. These large skates are found in the North Pacific.
Orbiraja is a genus of small skates in the family Rajidae from the western and central Indo-Pacific. Prior to 2016, they were included in the genus Okamejei.
The Melbourne skate is a species of fish in the belonging to the skate family Rajidae. It is endemic to southern Australia. Its natural habitat is open seas. It is found at depths up to 345 meters.
James Wilder Orr is an American fisheries biologist, ichthyologist, and systematist best known for his studies of skates, rockfishes, snailfishes, and flatfishes. He has described 32 new species and two new genera of fishes, and is the author or co-author of more than 130 scientific and popular articles, including three books. His work has focused primarily on the phylogenetic relationships, zoogeography, reproductive biology, and behavior of marine teleosts, particularly deep-water benthic taxa. He has spent most of his career at the Alaska Fisheries Science Center, National Marine Fisheries Service (NMFS), in Seattle, as a Research Fisheries Biologist. At the same time, he has served as an Affiliate Professor at the School of Aquatic and Fishery Sciences, and Affiliate Curator of Fishes at the Burke Museum of Natural History and Culture, University of Washington, Seattle. For his lifetime of service, Orr was presented with a National Oceanic and Atmospheric Administration (NOAA) Distinguished Career Award in 2022.
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