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Cymothoidae
The Cymothoidae are a family of isopods in the suborder Cymothoida found in both marine and freshwater environments. Cymoithoids are ectoparasites, usually of fish, and they include the bizarre "tongue-biter" ('' Cymothoa exigua''), which attaches to a fish's tongue, causing it to atrophy, and replaces the tongue with its own body. '' Ceratothoa oestroides'' is one of the most devastating ectoparasites in Mediterranean aquaculture. Around 40 genera and more than 380 species of cymothoid are recognised. Species of the Cymothoidae are generally found in warmer waters and rarely in the cool and cold climates. Characteristics Cymothoids exhibit various adaptations to their parasitic lifestyles. As juveniles, they are not specific in their requirements, and attach themselves temporarily to the skin of any fish. They produce anticoagulants and suck the fish's blood. They detach from their first host and later find another host. When they have found the correct species of fish fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratothoa Oestroides
''Ceratothoa oestroides'' is a crustacean isopod, obligate ectoparasite of marine fish that dwells in the buccal cavity. It is the causative agent of various pathologies including tissue damage at the parasitisation site (tongue), growth defects, decrease in mean host weight and size and increases mortalities in farmed and wild fish populations. It has been recorded in six different fish families: Sparidae (''Boops boops'', ''Diplodus annularis'', '' Pagelus erythrinus'', '' Spicara smaris, Sparus aurata''), Carangidae ('' Trachurus mediterraneus''), Clupeidae ('' Sardina pilchardus''), Maenidae, Scorpenidae ('' Scorpaena notata, Scorpaena porcus''), and Mugilidae ('' Liza aurata''). Adult male and female mate in the host buccal cavity (Fig. 1). Embryos develop in the female marsupium, where offspring pass through different pullus stages until they are released from the marsupium as free swimming manca, ready for infecting fish hosts. ''C. oestroides'' is one of the most d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymothoa Exigua
''Cymothoa exigua'', or the tongue-eating louse, is a parasitic isopod of the family Cymothoidae. It enters fish through the gills. The female attaches to the tongue, while the male attaches to the gill arches beneath and behind the female. Females are long and wide. Males are about long and wide. The parasite severs the blood vessels in the fish's tongue, causing the tongue to fall off. It then attaches itself to the remaining stub of tongue and the parasite itself effectively serves as the fish's new "tongue". Behavior Using its front claws, ''C. exigua'' severs the blood vessels in the fish's tongue, causing the tongue to necrose from lack of blood. The parasite then replaces the fish's tongue by attaching its own body to the muscles of the tongue stub. The parasite apparently does not cause much other damage to the host fish, but Lanzing and O'Connor (1975) reported that infested fish with two or more of the parasites are usually underweight. Once ''C. exigua'' repl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anilocra Capensis
''Anilocra capensis'' is a species of parasitic isopod in the family Cymothoidae. It is endemic to southern Africa. The species preferentially attaches itself to the hottentot seabream. Description ''Anilocra capensis'' has a smooth, slate-grey carapace, with a five-segmented pleon. The head bears short antennae and is triangular, the telson is rounded. The legs end in powerful hooks that are used to grip the parasitized fish. The well-developed uropods often extend well beyond the body. The species can grow quite large and may reach a length of 60 mm. Distribution The species occurs on the coast of southern Africa, from the west coast at Walvis Bay in Namibia to the east coast at East London in South Africa. Ecology The members of the family Cymothoidae are commonly referred to as "fish lice" (although this term is also used for the family Argulidae, which are also crustaceans but not closely related). Like all Cymothoidae, ''A. capensis'' is an ectoparasite that attache ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopod
Isopoda is an order of crustaceans that includes woodlice and their relatives. Isopods live in the sea, in fresh water, or on land. All have rigid, segmented exoskeletons, two pairs of antennae, seven pairs of jointed limbs on the thorax, and five pairs of branching appendages on the abdomen that are used in respiration. Females brood their young in a pouch under their thorax. Isopods have various feeding methods: some eat dead or decaying plant and animal matter, others are grazers, or filter feeders, a few are predators, and some are internal or external parasites, mostly of fish. Aquatic species mostly live on the seabed or bottom of freshwater bodies of water, but some taxa can swim for a short distance. Terrestrial forms move around by crawling and tend to be found in cool, moist places. Some species are able to roll themselves into a ball as a defense mechanism or to conserve moisture. There are over 10,000 identified species of isopod worldwide, with around 4,5 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artystone (crustacean)
Artystone ( peo, *R̥tastūnā; grc, Ἀρτυστώνη ; Elamite , {{transl, elx, Ir-da-iš-du-na) was a Persian princess, daughter of king Cyrus the Great, and sister or half-sister of Cambyses II, Atossa and Smerdis (Bardiyā). Along with Atossa and her niece Parmys, Artystone married king Darius I. It is argued that by marrying the female offspring of Cyrus, the founder of the empire, the new king aimed to prevent his rule from being contested, since Darius himself was not of royal blood. Artystone and Darius had at least two sons, Arsames and Gobryas, and a daughter, Artazostre. According to the Greek historian Herodotus Artystone was Darius' favourite wife. She is also mentioned in the Persepolis Fortification Tablets, an administrative archive from Persepolis. According to James Ussher, Artystone may have been another name for the biblical queen Esther, since Herodotus also called her Artystone the Virgin. While Esther is commonly known as the wife of Xerxes or Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cymothoida
Cymothoida is the name of a suborder of isopod crustaceans with a mostly carnivorous or parasitic lifestyle. It contains more than 2,700 described species in four superfamilies. Members of the suborder are characterised by their specialised mouthparts which include a mandible with a tooth-like process which is adapted for cutting or slicing. Classification Cymothoida contains these superfamilies and families: *Superfamily Anthuroidea Leach, 1814 ** Antheluridae Poore & Lew Ton, 1988 ** Anthuridae Leach, 1814 ** Expanathuridae Poore, 2001 ** Hyssuridae Wägele, 1981 ** Leptanthuridae Poore, 2001 ** Paranthuridae Menzies & Glynn, 1968 *Superfamily Cymothooidea Leach, 1814 **Aegidae White, 1850 **Anuropidae Stebbing, 1893 ** Barybrotidae Hansen, 1890 **Cirolanidae Dana, 1852 ** Corallanidae Hansen, 1890 ** Cymothoidae Leach, 1818 **Gnathiidae Leach, 1814 ** Protognathiidae Wägele & Brandt, 1988 ** Tridentellidae Bruce, 1984 *Superfamily Cryptoniscoidea Kossmann, 1880 **Asconisc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Dwight Dana
James Dwight Dana Royal Society of London, FRS FRSE (February 12, 1813 – April 14, 1895) was an American geologist, mineralogist, volcanologist, and zoologist. He made pioneering studies of mountain-building, volcano, volcanic activity, and the origin and structure of continents and oceans around the world. His zoological author abbreviation is Dana. Early life and career Dana was born February 12, 1813, in Utica, New York. His father was merchant James Dana (1780–1860) and his mother was Harriet Dwight (1792–1870). Through his mother he was related to the Dwight New England family of missionaries and educators including uncle Harrison Gray Otis Dwight and first cousin Henry Otis Dwight. He showed an early interest in science, which had been fostered by Fay Edgerton, a teacher in the Utica high school, and in 1830 he entered Yale College in order to study under Benjamin Silliman the elder. Graduating in 1833, for the next two years he was teacher of mathematics to midshi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jørgen Matthias Christian Schiødte
Jørgen Matthias Christian Schiødte (20 April 1815 – 22 April 1884), or Jørgen Christian Matthias Schiødte, was a Denmark, Danish entomologist, professor and museum curator. Biography Schiødte was born in Copenhagen and attended Borgerdydskolen in Christianshavn. From 1842, he was employed as curator of the Natural History Museum of Denmark and was a professor at the University of Copenhagen from 1845. J.C. Schiødte ''Dansk Biografisk Leksikon'' Retrieved December 1, 2020 His work was widely read "for, as Schiodte remarks: We accordingly look upon the subterranean faunas as small ramifications which have penetrated into the earth from the geographically limited faunas of the adjacent tracts, and which, as they extended themselves into darkness, have been accommodated to surrounding circumstances. Animals not far remote from ordinary forms, prepare the transition from light to darkness. Next follow those that are constructed for twilight; and, last of all, thos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederik Vilhelm August Meinert
Frederik Vilhelm August Meinert (1833, in Copenhagen – 1912), was a Danish people, Danish entomologist and editor of the first series of ''Entomologiske Meddelelser''. Meinert initially studied theology . Later he was a pupil of Jørgen Matthias Christian Schiødte and he too became ''Inspektor'' at the University of Copenhagen Zoological Museum, Zoological Museum in Copenhagen. Meinert specialised in comparative anatotomy and histology mainly of Malacostraca and Pycnogonida . Works *''Symbolæ ad monographiam Cymotharum Crustaceorum Isopodum familiæ'' (1879) with Schiødte *''Fluernes munddele trophi dipterorum''Kjobenhavn: H. Hagerups boghandel (1881). *''Crustacea malacostraca''. Det Videnskabelige Udbytte af Kanonbaaden "Hauchs" Togter 3: 147–230 (1890) * ''Pycnogonida'': af Fr. Meinert. Bianco Luno (1899) Species named for him are ''Clypeoniscus meinerti'' Giard & Bonnier, 1895, ''Laothoes meinerti'' Boeck, 1871, ''Paralaophonte meinerti''(Brady, 1899) and ''Neosarmati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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