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Finback Catshark
The finback catsharks are a small family, the Proscylliidae, of ground sharks. They can be found in warm seas worldwide and are often the most numerous and common shark in tropical regions. They are generally less than 1 m in length, and are slow-moving predators that feed on bony fish and small invertebrates. Although some bear live young, the majority lay eggs with almost fully developed young; these egg cases, known as "mermaid's purses", are unique in appearance to each species. Taxonomy Genus ''Proscyllium'' * Graceful catshark (''Proscyllium habereri'') was first discovered by Hildendorf in 1901. * ''Proscyllium venustum'' is found in temperate regions. It is distributed along the Northwest Pacific, primarily Japan. These sharks are oviparous; they lay eggs in pairs in which the embryos feed solely on yolk. This species is considered harmless to humans. * Magnificent catshark (''Proscyllium magnificum'') A newly discovered species within the family Proscyllidae, it has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonard Joseph Victor Compagno
Leonard Joseph Victor Compagno is an international authority on shark taxonomy and the author of many scientific papers and books on the subject, best known of which is his 1984 catalogue of shark species produced for the Food and Agriculture Organization (FAO) of the United Nations. Compagno was mentioned in the credits of the 1975 film ''Jaws'' along with the National Geographic Society. Career *Ph.D, Stanford University, 1979 *Adjunct professor, San Francisco State University, 1979 to 1985 *Curator of Fishes in the Division of Life Sciences and Head of the Shark Research Centre (SRC), Iziko Museums, Cape Town *Director, Shark Research Institute(SRI) Selected bibliography *Compagno, L.J.V., 1979. ''Carcharhinoid sharks: morphology, systematics and phylogeny''. Unpublished Ph. D. Thesis, Stanford University, 932 p. Available from University Microfilms International, Ann Arbor, Michigan. *Leonard Compagno, 1984a. FAO The Food and Agriculture Organization of the United Nati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cuban Ribbontail Catshark
The Cuban ribbontail catshark (''Eridacnis barbouri''), is a finback catshark of the family Proscylliidae, found off western central Atlantic Ocean at depths of between 430 and 613 m. It can grow up to a length of 34 cm. The Cuban ribbontail catshark is ovoviviparous Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop insi .... References * {{DEFAULTSORT:Cuban Ribbontail Catshark Eridacnis Ovoviviparous fish Taxa named by Henry Bryant Bigelow Taxa named by William Charles Schroeder Fish described in 1944 Fish of Cuba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proscylliidae
The finback catsharks are a small family, the Proscylliidae, of ground sharks. They can be found in warm seas worldwide and are often the most numerous and common shark in tropical regions. They are generally less than 1 m in length, and are slow-moving predators that feed on bony fish and small invertebrates. Although some bear live young, the majority lay eggs with almost fully developed young; these egg cases, known as "mermaid's purses", are unique in appearance to each species. Taxonomy Genus ''Proscyllium'' * Graceful catshark (''Proscyllium habereri'') was first discovered by Hildendorf in 1901. * ''Proscyllium venustum'' is found in temperate regions. It is distributed along the Northwest Pacific, primarily Japan. These sharks are oviparous; they lay eggs in pairs in which the embryos feed solely on yolk. This species is considered harmless to humans. * Magnificent catshark (''Proscyllium magnificum'') A newly discovered species within the family Proscyllidae, it has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovoviviparity
Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop inside eggs that remain in the mother's body until they are ready to hatch. The young of some ovoviviparous amphibians, such as ''Limnonectes larvaepartus'', are born as larvae, and undergo further metamorphosis outside the body of the mother. Members of genera ''Nectophrynoides'' and ''Eleutherodactylus'' bear froglets, not only the hatching, but all the most conspicuous metamorphosis, being completed inside the body of the mother before birth. Among insects that depend on opportunistic exploitation of transient food sources, such as many Sarcophagidae and other carrion flies, and species such as many Calliphoridae, that rely on fresh dung, and parasitoids such as tachinid flies that depend on entering the host as soon as possible, the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oviparity
Oviparous animals are animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and monotremes. In traditional usage, most insects (one being ''Culex pipiens'', or the common house mosquito), molluscs, and arachnids are also described as oviparous. Modes of reproduction The traditional modes of reproduction include oviparity, taken to be the ancestral condition, traditionally where either unfertilised oocytes or fertilised eggs are spawned, and viviparity traditionally including any mechanism where young are born live, or where the development of the young is supported by either parent in or on any part of their body. However, the biologist Thierry Lodé recently divided the traditional category of oviparous reproduction into two modes that he named ovuliparity and (true) oviparity respectively. He distinguished the tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill Raker
Gill rakers in fish are bony or cartilaginous processes that project from the branchial arch (gill arch) and are involved with suspension feeding tiny prey. They are not to be confused with the gill filaments that compose the fleshy part of the gill used for gas exchange. Rakers are usually present in two rows, projecting from both the anterior and posterior side of each gill arch. Rakers are widely varied in number, spacing, and form. By preventing food particles from exiting the spaces between the gill arches, they enable the retention of food particles in filter feeders. The structure and spacing of gill rakers in fish determines the size of food particles trapped, and correlates with feeding behavior. Fish with densely spaced, elongated, comb-like gill rakers are efficient at filtering tiny prey, whereas carnivores and omnivores often have more widely spaced gill rakers with secondary projections. Because gill raker characters often vary between closely related taxa, they are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harlequin Catshark ...
The harlequin catshark (''Ctenacis fehlmanni'') is a species of finback catshark, part of the family Proscylliidae, and the only member of the genus ''Ctenacis''. This shark is found in the western Indian Ocean off the coast of Somalia, at depths between 70 and 170 m. The 46 cm holotype was the only specimen that was ever found. References * {{Taxonbar, from=Q401586 harlequin catshark Fish of Somalia harlequin catshark The harlequin catshark (''Ctenacis fehlmanni'') is a species of finback catshark, part of the family Proscylliidae, and the only member of the genus ''Ctenacis''. This shark is found in the western Indian Ocean off the coast of Somalia, at dept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ctenacis ...
The harlequin catshark (''Ctenacis fehlmanni'') is a species of finback catshark, part of the family Proscylliidae, and the only member of the genus ''Ctenacis''. This shark is found in the western Indian Ocean off the coast of Somalia, at depths between 70 and 170 m. The 46 cm holotype was the only specimen that was ever found. References * {{Taxonbar, from=Q401586 harlequin catshark Fish of Somalia harlequin catshark The harlequin catshark (''Ctenacis fehlmanni'') is a species of finback catshark, part of the family Proscylliidae, and the only member of the genus ''Ctenacis''. This shark is found in the western Indian Ocean off the coast of Somalia, at dept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Ribbontail Catshark
The African ribbontail catshark, ''Eridacnis sinuans'', is a finback catshark of the family Proscylliidae, found in the western Indian Ocean, from Tanzania, South Africa, and Mozambique, at depths between 180 and 480 m. It can grow up to a length of 37 cm. The African ribbontail catshark is ovoviviparous Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop insi ... giving birth to two young per litter. The African ribbontail catshark's coloration is grey-brown. References * {{Taxonbar, from=Q769350 Eridacnis Ovoviviparous fish Taxa named by J. L. B. Smith Fish described in 1957 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pygmy Ribbontail Catshark
The pygmy ribbontail catshark (''Eridacnis radcliffei'') is a species of finback catshark, family Proscylliidae, distributed patchily in the western Indo-Pacific from Tanzania to the Philippines. It occurs around the edges of continental and insular shelves at a depth of , typically on or near mud bottoms. One of the smallest living shark species, the pygmy ribbontail catshark grows to a maximum known length of . It has a slender body with a low, ribbon-like tail fin, and is dark brown in color with blackish dorsal fin markings and tail bands. This shark feeds mainly on bony fishes, followed by crustaceans and then squid. It is aplacental viviparous with females bearing litters of 1–2 relatively large pups. It is of minimal significance to fisheries, being caught as bycatch in some areas. Taxonomy The first known specimens of the pygmy ribbontail catshark were collected during the 1907–1910 Philippine Expedition of the U.S. Fish Commission Steamer ''Albatross''. H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eridacnis
The genus ''Eridacnis'', the ribbontail catsharks, is a small genus of fin-back catsharks in the family Proscylliidae. It currently consists of the following species: * '' Eridacnis barbouri'' ( Bigelow & Schroeder, 1944) (Cuban ribbontail catshark) * ''Eridacnis radcliffei'' H. M. Smith, 1913 (pygmy ribbontail catshark) * ''Eridacnis sinuans The African ribbontail catshark, ''Eridacnis sinuans'', is a finback catshark of the family Proscylliidae, found in the western Indian Ocean, from Tanzania, South Africa, and Mozambique, at depths between 180 and 480 m. It can grow up to a l ...'' ( J. L. B. Smith, 1957) (African ribbontail catshark) References * Shark genera Taxa named by Hugh McCormick Smith {{shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
