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Chimaericolidea
Polyopisthocotylea is a subclass of parasitic flatworms in the class Monogenea. WoRMS (2019). Polyopisthocotylea. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=119220 on 2019-02-08Yamaguti, S. (1963). Systema Helminthum Volume IV Monogenea and Aspidocotylea: John Wiley & Sons.Hayward, C. (2005). Monogenea Polyopisthocotylea (ectoparasitic flukes). In K. Rohde (Ed.), Marine Parasitology (pp. 55-63): CSIRO, Collingwood, Australia & CABI, Oxon, UK. Classification There are only two subclasses in the class Monogenea: * Monopisthocotylea. The name means "a single posterior sucker" - the attachment organ (the haptor) is simple. * Polyopisthocotylea. The name means "several posterior suckers" - the attachment organ (the haptor) is complex, with several clamps or suckers. The subclass Polyopisthocotylea contains the four following orders: * Order Chimaericolidea * Order Diclybothriidea * Order Mazocraeidea * Order Polystomatidea Examples of species * '' Microco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyopisthocotylea
Polyopisthocotylea is a subclass of parasitic flatworms in the class Monogenea. WoRMS (2019). Polyopisthocotylea. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=119220 on 2019-02-08Yamaguti, S. (1963). Systema Helminthum Volume IV Monogenea and Aspidocotylea: John Wiley & Sons.Hayward, C. (2005). Monogenea Polyopisthocotylea (ectoparasitic flukes). In K. Rohde (Ed.), Marine Parasitology (pp. 55-63): CSIRO, Collingwood, Australia & CABI, Oxon, UK. Classification There are only two subclasses in the class Monogenea: * Monopisthocotylea. The name means "a single posterior sucker" - the attachment organ (the haptor) is simple. * Polyopisthocotylea. The name means "several posterior suckers" - the attachment organ (the haptor) is complex, with several clamps or suckers. The subclass Polyopisthocotylea contains the four following orders: * Order Chimaericolidea * Order Diclybothriidea * Order Mazocraeidea * Order Polystomatidea Examples of species * '' Microco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monogenea
Monogeneans are a group of ectoparasitic flatworms commonly found on the skin, gills, or fins of fish. They have a direct lifecycle and do not require an intermediate host. Adults are hermaphrodites, meaning they have both male and female reproductive structures.L.A. Tubbsa et al. (2005). "Effects of temperature on fecundity in vitro, egg hatching and reproductive development of ''Benedenia seriolae'' and ''Zeuxapta seriolae'' (Monogenea) parasitic on yellowtail kingfish Seriola lalandi". ''International Journal for Parasitology''(35), 315–327. Some monogeneans are oviparous (egg-laying) and some are viviparous (live-bearing). Oviparous varieties release eggs into the water. Viviparous varieties release larvae, which immediately attach to another host. The genus ''Gyrodactylus'' is an example of a viviparous variety, while the genus ''Dactylogyrus'' is an example of an oviparous variety. Signs and symptoms Freshwater fish that become infected with this parasite become let ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chimaericolidea
Polyopisthocotylea is a subclass of parasitic flatworms in the class Monogenea. WoRMS (2019). Polyopisthocotylea. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=119220 on 2019-02-08Yamaguti, S. (1963). Systema Helminthum Volume IV Monogenea and Aspidocotylea: John Wiley & Sons.Hayward, C. (2005). Monogenea Polyopisthocotylea (ectoparasitic flukes). In K. Rohde (Ed.), Marine Parasitology (pp. 55-63): CSIRO, Collingwood, Australia & CABI, Oxon, UK. Classification There are only two subclasses in the class Monogenea: * Monopisthocotylea. The name means "a single posterior sucker" - the attachment organ (the haptor) is simple. * Polyopisthocotylea. The name means "several posterior suckers" - the attachment organ (the haptor) is complex, with several clamps or suckers. The subclass Polyopisthocotylea contains the four following orders: * Order Chimaericolidea * Order Diclybothriidea * Order Mazocraeidea * Order Polystomatidea Examples of species * '' Microco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polystomatidea
Polyopisthocotylea is a subclass of parasitic flatworms in the class Monogenea. WoRMS (2019). Polyopisthocotylea. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=119220 on 2019-02-08Yamaguti, S. (1963). Systema Helminthum Volume IV Monogenea and Aspidocotylea: John Wiley & Sons.Hayward, C. (2005). Monogenea Polyopisthocotylea (ectoparasitic flukes). In K. Rohde (Ed.), Marine Parasitology (pp. 55-63): CSIRO, Collingwood, Australia & CABI, Oxon, UK. Classification There are only two subclasses in the class Monogenea: * Monopisthocotylea. The name means "a single posterior sucker" - the attachment organ (the haptor) is simple. * Polyopisthocotylea. The name means "several posterior suckers" - the attachment organ (the haptor) is complex, with several clamps or suckers. The subclass Polyopisthocotylea contains the four following orders: * Order Chimaericolidea * Order Diclybothriidea * Order Mazocraeidea * Order Polystomatidea Examples of species * '' Microco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monogamy
Monogamy ( ) is a form of dyadic relationship in which an individual has only one partner during their lifetime. Alternately, only one partner at any one time (serial monogamy) — as compared to the various forms of non-monogamy (e.g., polygamy or polyamory). The term is also applied to the social behavior of some animals, referring to the state of having only one mate at any one time. A monogamous relationship can be sexual or emotional, but it's usually both. Many modern relationships are monogamous. Terminology The word ''monogamy'' derives from the Greek μονός, ''monos'' ("alone"), and γάμος, ''gamos'' ("marriage").Cf. "Monogamy" in ''Britannica World Language Dictionary'', R.C. Preble (ed.), Oxford-London 1962, p. 1275:''1. The practice or principle of marrying only once. opp. to digamy now ''rare'' 2. The condition, rule or custom of being married to only one person at a time (opp. to polygamy or bigamy) 1708. 3. Zool. The habit of living in pairs, or havin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chimaera Monstrosa
''Chimaera monstrosa'', also known as the rabbit fish or rat fish, is a northeast Atlantic Ocean, Atlantic and Mediterranean Sea, Mediterranean species of cartilaginous fish in the family Chimaeridae. The rabbit fish is known for its characteristically large head and small, tapering body. With large eyes, nostrils, and tooth plates, the head gives them a rabbit-like appearance, hence the nickname “Rabbit fish”. They can grow to and live for up to 30 years. Description The appearance of ''C. monstrosa'' shares characteristics of its distant relatives, sharks. It characteristically has a large head and a tapering body that ends in its whip-like tail, and has a short snout with an overhanging mouth. The top dorsal fin is positioned high on the spine of the fish, and is triangular and tall in height. Positioned in the mid-section of the fish, the spine runs throughout the length of the fish and continuously joins with the upper part of the caudal fin; this dorsal spine is als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chimaericola Leptogaster
''Chimaericola leptogaster'' is a species of polyopisthocotylean monogenean in the family Chimaericolidae. It is ectoparasitic on the gills of the chimaera ''Chimaera monstrosa''. History According to Brinkmann,Brinkmann Jr, A. (1942). On ''Octobothrium leptogaster'' FS Leuckart. Goteborgs Kungliga Vetenskaps-och Vitterhets-Samhalles Handlingar. Series B, 2(3), 1-29. the species was discovered as early as 1828 on the gills of chimaeras off Norway by Rapp and was given a scientific name by Friedrich Sigismund Leuckart in 1830, as ''Octobothrium leptogaster'', but Leuckart did not see the animal. The species was then mentioned by Félix Dujardin and Karl Moriz Diesing, who also did not see the specimens. However, Diesing transferred the species to the genus '' Discocotyle'' but also considered the species as "species inquirenda". Later, in 1858, Diesing transferred the species to the genus ''Placoplectanum''. Olsson redescribed the animal in 1876 Olsson, P. (1876). Bidrag till ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexanchus Nakamurai
The bigeyed sixgill shark (''Hexanchus nakamurai'') is a cow shark of the family Hexanchidae. Its dorsal surface has a brownish-gray color, and is sharply separated from the light coloring of its ventral surface. The eyes are a fluorescent green while the shark is alive. The body of this shark is small, slim, and fusiform in shape. As the name suggests, this shark has six gill slits, unusual among most shark species. The head is narrow and somewhat flattened, and the mouth contains 5 rows of large, comb-shaped teeth. This shark's single dorsal fin is pushed back towards the caudal fin, and is behind the pelvic fins. The upper caudal fin is much longer than the lower, with a deep notch near the tip. All fins have thin white margins on the edge. In juveniles, the upper caudal fin has a black tip. Measurements Length at birth for this species is 34–45 cm; adults average 1.2 m for both genders, with a maximum of 1.8 m. Mature adults weigh around 20 kg. Range and habitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protocotyle Euzetmaillardi
''Protocotyle euzetmaillardi'' is a species of monogenean of the family Hexabothriidae. It is the third described species of the genus '' Protocotyle'', after '' Protocotyle grisea'' (Cerfontaine, 1899) Euzet & Maillard, 1974Euzet, L. & Maillard, C. 1974: Les Monogènes Hexabothriidae Price, 1942. Historique, systématique, phylogenèse. Bulletin du Muséum National d'Histoire Naturelle, 3° série, 206, Zoologie 136, 113-141PDF and '' Protocotyle taschenbergi'' (Maillard & Oliver, 1966Maillard, C. & Oliver, G. 1966: Monogenea, Hexabothriidae. Vie et Milieu Série A: Biologie marine, 17, 1201-1216.) Euzet & Maillard, 1974. The body is 4.5-6.1 millimetres in length, elongate, and it includes, like all monogeneans, a posterior attachment organ called haptor. The haptor is symmetrical, armed with six suckers, each provided with one hook-shaped sclerite, and there is a lateral appendix bearing a single pair of terminal suckers and a single pair of hooks (also called hamuli). Ther ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polystoma Integerrimum
''Polystoma integerrimum'' is a flatworm (platyhelminth) from the class Monogenea found in amphibians in Asia and Europe. It is an endoparasite of frogs and toads and has an unusual life cycle which synchronises with that of its host. Description ''P. integerrimum'' is a leaf-like flatworm that can grow to a maximum length of about . At the anterior (head) end are the mouth and a pair of suckers, and at the posterior end is the main device by which the parasite attaches to its host, the opisthaptor, with its three pairs of suckers, a pair of hooked anchors and marginal hooks. The flatworm's mouth is connected to a muscular pharynx, an oesophagus and a gut, but it has no anus. Ecology ''P. integerrimum'' inhabits the bladder of a frog or toad where it feeds on blood, mucus and the sloughed cells of its host. Unlike many species of flatworm, the adults are either male or female, with functional testes or ovaries. The eggs are produced throughout the year but are stored in the ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caranx Papuensis
The brassy trevally, ''Caranx papuensis'' (also known as the brassy kingfish, Papuan trevally, tea-leaf trevally, and green back trevally) is a species of large marine fish classified in the jack family, Carangidae. Taxonomy and naming The brassy trevally is classified within the genus ''Caranx'', one of a number of groups known as the jacks or trevallies. ''Caranx'' itself is part of the larger jack and horse mackerel family Carangidae, which in turn is part of the order Carangiformes. The species was first scientifically described by the Australian zoologists Haynes Gibbes Alleyne and William John Macleay in 1877 based on a specimen collected from Hall Sound off Papua New Guinea, which was designated to be the holotype. They named the species ''Caranx papuensis'', with the specific epithet taking its name from Papua New Guinea where the holotype was taken. They referred the species to the genus ''Caranx'', where it has remained. The species was independently redescribed twice; t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lethacotyle Vera
''Lethacotyle vera'' is a species of monogenean of the family Protomicrocotylidae.Johnston, T. A. & Tiegs, O. W. 1922: New gyrodactyloid trematodes from Australian fishes together with a reclassification of the super-family Gyrodactyloidea. Proceedings of the Linnean Society of New South Wales, 47, 83-131. The species is ectoparasitic on the gills of the brassy trevally, (''Caranx papuensis''), off New Caledonia and was found only in this locality. It is the second species of the genus ''Lethacotyle'' Manter & Prince, 1953 described after the type-species, ''Lethacotyle fijiensis'' Manter & Prince, 1953. The genus ''Lethacotyle'' is special in that its members have no clamps on their posterior attachment organ or haptor, in contrast to most polyopisthocotylean Monogeneans which have clamps. The body of adult ''L. vera'' is 2.7-5.4 millimetres in length. The body is elongate, flat, with a pointed head showing two anterior suckers. There are numerous anterior testes and a si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
