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Pseudorhabdosynochus
''Pseudorhabdosynochus'' is a genus of monopisthocotylean monogeneans, included in the family Diplectanidae. The type-species of the genus is ''Pseudorhabdosynochus epinepheli'' ( Yamaguti, 1938). The genus includes more than 80 species, which are all parasitic on the gills of marine fish, especially groupers. Since groupers are mostly abundant in warm waters, species of ''Pseudorhabdosynochus'' are found in warm parts of the oceans, especially in coral reefs, but species have also been found in deep-sea groupers. Several species of ''Pseudorhabdosynochus'' are pathogens of maricultured groupers. Morphology All species of ''Pseudorhabdosynochus'' are small animals, ranging 0.3–1 mm in length. As most monogeneans, they are flat, with an anterior head bearing four oculi and head glands, a main elongate body and a posterior haptor. The digestive system includes an anterior muscular pharynx, and two lateral intestinal branches (or caeca); as in all Platyhelminthes, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudorhabdosynochus Morrhua
''Pseudorhabdosynochus'' is a genus of monopisthocotylean monogeneans, included in the family Diplectanidae. The type-species of the genus is ''Pseudorhabdosynochus epinepheli'' ( Yamaguti, 1938). The genus includes more than 80 species, which are all parasitic on the gills of marine fish, especially groupers. Since groupers are mostly abundant in warm waters, species of ''Pseudorhabdosynochus'' are found in warm parts of the oceans, especially in coral reefs, but species have also been found in deep-sea groupers. Several species of ''Pseudorhabdosynochus'' are pathogens of maricultured groupers. Morphology All species of ''Pseudorhabdosynochus'' are small animals, ranging 0.3–1 mm in length. As most monogeneans, they are flat, with an anterior head bearing four oculi and head glands, a main elongate body and a posterior haptor. The digestive system includes an anterior muscular pharynx, and two lateral intestinal branches (or caeca); as in all Platyhelminthes, there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudorhabdosynochus Caledonicus Male And Female Organs
''Pseudorhabdosynochus'' is a genus of monopisthocotylean monogeneans, included in the family Diplectanidae. The type-species of the genus is ''Pseudorhabdosynochus epinepheli'' ( Yamaguti, 1938). The genus includes more than 80 species, which are all parasitic on the gills of marine fish, especially groupers. Since groupers are mostly abundant in warm waters, species of ''Pseudorhabdosynochus'' are found in warm parts of the oceans, especially in coral reefs, but species have also been found in deep-sea groupers. Several species of ''Pseudorhabdosynochus'' are pathogens of maricultured groupers. Morphology All species of ''Pseudorhabdosynochus'' are small animals, ranging 0.3–1 mm in length. As most monogeneans, they are flat, with an anterior head bearing four oculi and head glands, a main elongate body and a posterior haptor. The digestive system includes an anterior muscular pharynx, and two lateral intestinal branches (or caeca); as in all Platyhelminthes, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudorhabdosynochus Morrhua - With English Captions
''Pseudorhabdosynochus'' is a genus of monopisthocotylean monogeneans, included in the family Diplectanidae. The type-species of the genus is ''Pseudorhabdosynochus epinepheli'' ( Yamaguti, 1938). The genus includes more than 80 species, which are all parasitic on the gills of marine fish, especially groupers. Since groupers are mostly abundant in warm waters, species of ''Pseudorhabdosynochus'' are found in warm parts of the oceans, especially in coral reefs, but species have also been found in deep-sea groupers. Several species of ''Pseudorhabdosynochus'' are pathogens of maricultured groupers. Morphology All species of ''Pseudorhabdosynochus'' are small animals, ranging 0.3–1 mm in length. As most monogeneans, they are flat, with an anterior head bearing four oculi and head glands, a main elongate body and a posterior haptor. The digestive system includes an anterior muscular pharynx, and two lateral intestinal branches (or caeca); as in all Platyhelminthes, there ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudorhabdosynochus Epinepheli
''Pseudorhabdosynochus epinepheli'' is a diplectanid monogenean parasitic on the gills of species of groupers. It is the type species of the genus ''Pseudorhabdosynochus'' Yamaguti, 1958. Description ''Pseudorhabdosynochus epinepheli'' is a small monogenean, about half a millimetre in length. Adults are hermaphroditic. The species has the general characteristics of other diplectanids, with a flat body and a posterior haptor, which is the organ by which the monogenean attaches itself to the gill of is host. The haptor bears two squamodiscs, one ventral and one dorsal, which are made up of numerous rows of rodlets. The reproductive organ include a single ovary and a single testis. The sclerotized male copulatory organ, or "quadriloculate organ", has the shape of a bean with four internal chambers, as in other species of ''Pseudorhabdosynochus''. The vagina also includes a sclerotized part, which is a complex structure. The sclerotised vagina comprises an anterior trumpet, fol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudorhabdosynochus Sinediscus
''Pseudorhabdosynochus sinediscus'' is a diplectanid monogenean parasitic on the gills of groupers. It has been described in 2007 by Lassad Neifar & Louis Euzet. The name refers to the absence of squamodiscs and is derived from the Latin “''sine''”, indicating absence, and “''discus''”, contraction of “''squamodiscus''”. The species has been redescribed by Amira Chaabane, Lassad Neifar, and Jean-Lou Justine in 2017 from the type material and additional specimens from Tunisia. Description ''Pseudorhabdosynochus sinediscus'' is a small monogenean. The species has the general characteristics of other species of ''Pseudorhabdosynochus'', with a flat body and a posterior haptor, which is the organ by which the monogenean attaches itself to the gill of is host. The sclerotized male copulatory organ, or "quadriloculate organ", has the shape of a bean with four internal chambers, as in other species of ''Pseudorhabdosynochus''. The vagina includes a sclerotized part, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diplectanidae
The Diplectanidae are a family of monopisthocotylean monogeneans. They are all parasitic on the gills of fish (marine or freshwater). Diplectanids are small animals, generally around 1 mm in length. As parasites, they can be extremely numerous, up to several thousand on an individual fish. History The family Diplectanidae was proposed by the Italian parasitologist Monticelli in 1903 (as subfamily Diplectaninae). The status of the family and its components was later examined by various authors, including Johnston & Tiegs (1922), Price (1937),Price, E. W. 1937: North American Monogenetic Trematodes. I. The superfamily Gyrodactyloidea ''Journal of the Washington Academy of Sciences'' 27, 146-164PDF Bychowsky (1957), Yamaguti (1963), and Oliver (1987). Morphology Diplectanids are diagnosed by the combination of these three characters: * Presence of accessory adhesive organs on dorsal and ventral part of the haptor, called squamodiscs when they are made up of rodlets and lam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squamodisc
Squamodiscs are epidermal structures, which are typical of and found only in certain monogeneans of the family Diplectanidae. There are, typically, two squamodiscs, one ventral and one dorsal, located on the haptor of the monogenean. Squamodiscs are usually made up of scales embedded in the epidermis, which appear from the outside as rodlets arranged in rows. According to the classical book of Bychowsky (1967), Bychowsky, B. E. (1957) Monogenetic Trematodes. Their systematic and phylogeny. Akad. Nauka. USSR. English translation by the American Institute of Biological Science, Washington. 509 pp. “the Diplectanidae] have special paired attaching formations lying above the disc and also partially on it, on the dorsal and ventral sides in the shape of small rounded convexities equipped with numerous ..thorn-shaped little hooks or thin thread-like plates located more or less in concentric rows ("squamodisc")". Ultrastructural studies of squamodiscs have shown that they include ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epinephelus Akaara
The Hong Kong grouper (''Epinephelus akaara'') is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. It is found in eastern and southeastern Asian waters of the Western Pacific Ocean. Its natural habitats are shallow seas and coral reefs. Description The Hong Kong grouper has a body which has a standard length which is around 2.7-3.2 times the depth of its body. The dorsal profile of the head is convex between the eyes. The preopercle is rounded and serrated with the serrations at its angle enlarged. The dorsal fin contains 11 spines and 15-17 soft rays while the anal fin has 3 spines and 8 soft rays. The caudal fin is rounded and the pelvic fin does not extend as far as the anus. There are 61-64 scales in the lateral line. The head and body have a pale brownish grey background colour, with the flanks and back covered with small red, orange or gold spots. There a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monopisthocotylea
The Monopisthocotylea are a subclass of parasitic flatworms in the class Monogenea. WoRMS (2019). Monopisthocotylea. Accessed at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=119219 on 2019-02-08 Yamaguti, 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 Monopisthocotylea contains these orders: * Order Capsalidea * Order Dactylogyridea * Order Gyrodactylidea * Order Monocotylidea * Order Montchadskyellidea Example of species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grouper
Groupers are fish of any of a number of genera in the subfamily Epinephelinae of the family Serranidae, in the order Perciformes. Not all serranids are called "groupers"; the family also includes the sea basses. The common name "grouper" is usually given to fish in one of two large genera: ''Epinephelus'' and ''Mycteroperca''. In addition, the species classified in the small genera ''Anyperidon'', ''Cromileptes'', ''Dermatolepis'', ''Graciela'', ''Saloptia'', and ''Triso'' are also called "groupers." Fish in the genus ''Plectropomus'' are referred to as "coral groupers." These genera are all classified in the subfamily Epiphelinae. However, some of the hamlets (genus ''Alphestes''), the hinds (genus ''Cephalopholis''), the lyretails (genus ''Variola''), and some other small genera (''Gonioplectrus'', ''Niphon'', ''Paranthias'') are also in this subfamily, and occasional species in other serranid genera have common names involving the word "grouper." Nonetheless, the word "gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haptor
The haptor is the attachment organ of the monogeneans, a group of parasitic Platyhelminthes. The haptor is sometimes called opisthaptor (from ''opistho-'': behind) to emphasize that it is located in the posterior part of the body, and to differentiate it from the prohaptor (from ''pro-'': in front), a structure including glands located at the anterior part of the body. According to Yamaguti (1963), the chief adhesive organ of the monogeneans, the haptor, is posterior, more or less discoid, muscular, may be divided into alveoli or loculi, is usually provided with anchors, has nearly always marginal larval hooklets, or is in a reduced form with anchors. The haptor may consist of symmetrical or asymmetrical, sessile or pedunculate, muscular suckers or clamps with or without supporting sclerites; accessory adhesive organs may be present in form of armed plaques, lappets or appendices. The structure of the haptor is different in the two major groups constituting the Monogenea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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