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Macrouridophora Nezumiae
''Diclidophora nezumiae'' is a species of monogenean flatworm that parasitizes the gills of the rattail fish ''Nezumia bairdii''. Due to a highly localized host habitat parasite incidence is relatedly localized to the Hudson Submarine Canyon. Description ''D. nezumiae'' are similar in body shape to smaller ''Diclidophora'' species, with shorter bodies that taper to a maximum width at the first pair of clamps; 8 posterior clamps in total. Unlike other ''Diclidophora'' species, ''D. nezumiae'' have clamps that are wider than they are long, relatively small clamp suckers, postovarian testes and unlobed seminal receptacle on right side of ovary. An N- or U-shaped ovary is present in the posterior end of body. Eggs are elliptical and filamented, and larval stages are highly ciliated. Development Like all monogeneans, ''D. nezumia''e has no intermediate host and is ectoparasitic. It is hermaphroditic, with the male reproductive organs becoming functional prior to the female organs. F ... [...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] |
Grenadiers (fish)
Grenadiers or rattails are generally large, brown to black gadiform marine fish of the subfamily Macrourinae, the largest subfamily of the family Macrouridae. Found at great depths from the Arctic to Antarctic, members of this subfamily are amongst the most abundant of the deep-sea fish. The macrourins form a large and diverse family with 28 extant genera recognized (well over half of the total species are contained in just three genera, '' Coelorinchus'', '' Coryphaenoides'', and '' Nezumia''). They range in length from about in ''Hymenogadus gracilis'' to in ''Albatrossia pectoralis''. Several attempts have been made to establish a commercial fishery for the most common larger species, such as the giant grenadier, but the fish is considered unpalatable, and attempts thus far have proven unsuccessful. The subfamily as a whole may represent up to 15% of the deep-sea fish population. Rattails, characterized by large heads with large mouths and eyes, have slender bodies that tap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nezumia Bairdii
''Nezumia'' is a genus of rattails. The generic name derives from the Japanese 鼠 (''nezumi''), meaning "mouse". Species There are currently 53 recognized species in this genus: * '' Nezumia aequalis'' ( Günther, 1878) (Common Atlantic grenadier) * '' Nezumia africana'' ( Iwamoto, 1970) * '' Nezumia aspidentata'' Iwamoto & Merrett, 1997 * '' Nezumia atlantica'' ( A. E. Parr, 1946) (Western Atlantic grenadier) * '' Nezumia bairdii'' (Goode & T. H. Bean, 1877) (Marlin-spike grenadier) * ''Nezumia brevibarbata'' (Barnard, 1925) (Short-beard grenadier) * ''Nezumia brevirostris'' ( Alcock, 1889) * ''Nezumia burragei'' ( C. H. Gilbert, 1905) * '' Nezumia cliveri'' Iwamoto & Merrett, 1997 * '' Nezumia coheni'' Iwamoto & Merrett, 1997 (Cohen's whiptail) * '' Nezumia condylura'' D. S. Jordan & C. H. Gilbert, 1904 (Japanese pugnose grenadier) * '' Nezumia convergens'' (Garman, 1899) (Peruvian grenadier) * '' Nezumia cyrano'' N. B. Marshall & Iwamoto, 1973 * '' Nezumia darus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diclidophora
''Diclidophora'' is a genus of flatworms belonging to the family Diclidophoridae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext .... Species: *'' Diclidophora caudospina'' *'' Diclidophora denticulata'' *'' Diclidophora embiotocae'' *'' Diclidophora esmarkii'' *'' Diclidophora esmarkii'' *'' Diclidophora indica'' *'' Diclidophora luscae'' *'' Diclidophora maccallumi'' *'' Diclidophora merlangi'' *'' Diclidophora micromesisti'' *'' Diclidophora minor'' *'' Diclidophora minuti'' *'' Diclidophora morrhuae'' *'' Diclidophora paddiforma'' *'' Diclidophora pagelli'' *'' Diclidophora palmata'' *'' Diclidophora phycidis'' *'' Diclidophora pollachii'' *'' Diclidophora srivastavai'' References {{Taxonbar, from=Q14372542 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clamp (zoology)
Clamps are the main attachment structure of the Polyopisthocotylean monogeneans. 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. These ectoparasitic worms have a variable number of clamps on their haptor (the posterior attachment organ); each clamp is attached to the host fish, generally to its gill. Clamps include sclerotised elements, called the sclerites, and muscles Skeletal muscles (commonly referred to as muscles) are organs of the vertebrate muscular system and typically are attached by tendons to bones of a skeleton. The muscle cells of skeletal muscles are much longer than in the other types of muscle .... The structure of clamps varies according to the groups within the Polyopisthocotylean monogeneans; microcotylids have relatively simple clamps, whereas gastrocotylids have more complex clamps. References {{Reflist Platyhel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oncomiracidium
An oncomiracidium is the ciliated and free-living larva of a monogenean, a type of parasitic flatworm commonly found on fish. It is similar to the miracidium of Trematoda, but has sclerotised Sclerotin is a component of the cuticle of various Arthropoda, most familiarly insects. It is formed by cross-linking members of particular classes of protein molecules, a biochemical process called sclerotization, a form of tanning in which qui ... (hardened) hooklets not found in the latter. References Monogenea {{Monogenea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dactylogyrus
''Dactylogyrus'' is a genus of monogeneans in the Dactylogyridae family. Like other monogeneans, species of ''Dactylogyrus'' only have one host required to complete their life cycle. Introduction Members of ''Dactylogyrus'' (common name: Gill Fluke) are oviparous (egg-laying) monogeneans trematodes that have two pairs of anchors. These anchors can be used to latch onto the gills of a host, particularly freshwater fish such as carp. In heavily infected fish, ''Dactylogyrus'' can also be found on the buccal cavity, and at times fins and skin of the freshwater fish. Species ''Dactylogyrus'' is one of the most speciose genus of helminths, with more than 900 species described. Consequently, in 1996, it was estimated that the taxonomy was "in a state of considerable confusion". Anatomy Other characteristics of ''Dactylogyrus'' species include the appearance of four eye-spots, 14 marginal hooks (7 pairs), one to two connective bars and two needle-like structures and spindle-sh ... [...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] |
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