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Protomicrocotylidae
Protomicrocotylidae is a family of monogenean parasites in the order Mazocraeidea. The type-genus of the family is '' Protomicrocotyle''. The genus was created in 1922 by Thomas Harvey Johnston and Oscar Werner Tiegs for a worm previously described under the name ''Acanthodiscus mirabile'' by MacCallum in 1918.MacCallum, G. A. 1918: Notes on the genus ''Telorchis'' and other trematodes. Zoopathologica, 1, 81-97. The worm was parasitic on a crevalle jack of the New York Aquarium. Johnston & Tiegs originally proposed to create the subfamily Protomicrocotylinae, which was later raised to family level. Members of this family are elongate, flat, and long of 1 to several millimetres. The reproductive system includes many testes, located in the anterior region of the body between the ceca, and a single posterior ovary. The male copulatory organ usually has spines. The posterior attachment organ or haptor, which attaches the worm to the host, is asymmetrical and has three pairs of sm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chauhanocotyle
Protomicrocotylidae is a family of monogenean parasites in the order Mazocraeidea. The type-genus of the family is ''Protomicrocotyle''. The genus was created in 1922 by Thomas Harvey Johnston and Oscar Werner Tiegs for a worm previously described under the name ''Acanthodiscus mirabile'' by MacCallum in 1918.MacCallum, G. A. 1918: Notes on the genus ''Telorchis'' and other trematodes. Zoopathologica, 1, 81-97. The worm was parasite, parasitic on a Caranx hippos, crevalle jack of the New York Aquarium. Johnston & Tiegs originally proposed to create the subfamily Protomicrocotylinae, which was later raised to family level. Members of this family are elongate, flat, and long of 1 to several millimetres. The reproductive system includes many testis, testes, located in the anterior region of the body between the cecum, ceca, and a single posterior ovary. The male copulatory organ usually has spines. The posterior attachment organ or haptor, which attaches the worm to the host, is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protomicrocotyle
Protomicrocotylidae is a family of monogenean parasites in the order Mazocraeidea. The type-genus of the family is '' Protomicrocotyle''. The genus was created in 1922 by Thomas Harvey Johnston and Oscar Werner Tiegs for a worm previously described under the name ''Acanthodiscus mirabile'' by MacCallum in 1918.MacCallum, G. A. 1918: Notes on the genus ''Telorchis'' and other trematodes. Zoopathologica, 1, 81-97. The worm was parasitic on a crevalle jack of the New York Aquarium. Johnston & Tiegs originally proposed to create the subfamily Protomicrocotylinae, which was later raised to family level. Members of this family are elongate, flat, and long of 1 to several millimetres. The reproductive system includes many testes, located in the anterior region of the body between the ceca, and a single posterior ovary. The male copulatory organ usually has spines. The posterior attachment organ or haptor, which attaches the worm to the host, is asymmetrical and has three pairs of sm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bilaterocotyloides
Protomicrocotylidae is a family of monogenean parasites in the order Mazocraeidea. The type-genus of the family is ''Protomicrocotyle''. The genus was created in 1922 by Thomas Harvey Johnston and Oscar Werner Tiegs for a worm previously described under the name ''Acanthodiscus mirabile'' by MacCallum in 1918.MacCallum, G. A. 1918: Notes on the genus ''Telorchis'' and other trematodes. Zoopathologica, 1, 81-97. The worm was parasitic on a crevalle jack of the New York Aquarium. Johnston & Tiegs originally proposed to create the subfamily Protomicrocotylinae, which was later raised to family level. Members of this family are elongate, flat, and long of 1 to several millimetres. The reproductive system includes many testes, located in the anterior region of the body between the ceca, and a single posterior ovary. The male copulatory organ usually has spines. The posterior attachment organ or haptor, which attaches the worm to the host, is asymmetrical and has three pairs of sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bilaterocotyle
Protomicrocotylidae is a family of monogenean parasites in the order Mazocraeidea. The type-genus of the family is ''Protomicrocotyle''. The genus was created in 1922 by Thomas Harvey Johnston and Oscar Werner Tiegs for a worm previously described under the name ''Acanthodiscus mirabile'' by MacCallum in 1918.MacCallum, G. A. 1918: Notes on the genus ''Telorchis'' and other trematodes. Zoopathologica, 1, 81-97. The worm was parasitic on a crevalle jack of the New York Aquarium. Johnston & Tiegs originally proposed to create the subfamily Protomicrocotylinae, which was later raised to family level. Members of this family are elongate, flat, and long of 1 to several millimetres. The reproductive system includes many testes, located in the anterior region of the body between the ceca, and a single posterior ovary. The male copulatory organ usually has spines. The posterior attachment organ or haptor, which attaches the worm to the host, is asymmetrical and has three pairs of sma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mazocraeidea
Mazocraeidea is an order in the subclass Polyopisthocotylea within class Monogenea. The species of this order have various structures in the clamps of their posterior attachment organ, including additional sclerites in the Gastrocotylidae and related families. However, these additional sclerites, and even the clamps themselves, are lacking in certain members of the family Protomicrocotylidae. Families ;According to PESI * Anthocotylidae Bychowsky, 1957 * Axinidae Monticelli, 1903 * Chauhaneidae Euzet & Trilles, 1960 * Diclidophoridae Fuhrmann, 1928 * Diplozoidae * Discocotylidae Price, 1936 * Gotocotylidae Yamaguti, 1963 * Heteraxinidae Unnithan, 1957 * Hexostomatidae Price, 1936 * Mazocraeidae Price, 1936 * Microcotylidae Taschenberg, 1879 * Octolabeidae * Plectanocotylidae Monticelli, 1903 * Protomicrocotylidae Johnston & Tiegs, 1922 * Pyragraphoridae Yamaguti, 1963 ;According to the World Register of Marine Species: * Allodiscocotylidae * Allopyragraphoridae * Anchor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vestigiality
Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. Assessment of the vestigiality must generally rely on comparison with homologous features in related species. The emergence of vestigiality occurs by normal evolutionary processes, typically by loss of function of a feature that is no longer subject to positive selection pressures when it loses its value in a changing environment. The feature may be selected against more urgently when its function becomes definitively harmful, but if the lack of the feature provides no advantage, and its presence provides no disadvantage, the feature may not be phased out by natural selection and persist across species. Examples of vestigial structures (also called degenerate, atrophied, or rudimentary organs) are the loss of functional wings in island-dwelling birds; the human vomeronasal organ; and the hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lethacotyle
''Lethacotyle'' is a genus of polyopisthocotylean monogeneans, included in the family Protomicrocotylidae. The genus includes only two species: ''Lethacotyle fijiensis'' Manter & Price, 1953 Manter, H. W. & Price, D. F. 1953: Some Monogenetic Trematodes of marine fishes from Fiji. Proceedings of the Helminthological Society of Washington, 20, 105-112. , the type-species of the genus, and ''Lethacotyle vera'' Jean-Lou Justine, Justine, Rahmouni, Gey, Schoelinck, & Hoberg, 2013 . Both species are parasitic on the gills of Carangidae, jacks in the Pacific Ocean.Ramalingam, K. 1966: A rare record of ''Lethacotyle'' (Monogenea), its post-oncomiracidial larva with observation on distribution. ''Current Science'', 35, 101-10PDFRamalingam, K. 1968: A redescription of ''Lethacotyle'' (Monogenea) and its post-oncomiracidial larva. Journal of the Madras University B, 35-36, 107-114. They are known only from three localities: off Fiji, Andaman Islands, and New Caledonia. The genus ''Lethacoty ... [...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] |
Lethacotyle Fijiensis
''Lethacotyle fijiensis'' is a species of monogeneans of the family Protomicrocotylidae. The species is ectoparasitic on the gills of an unknown Carangidae, carangid fish identified in the original publication as "yellow jack". It is the type-species of the genus ''Lethacotyle'' Manter & Prince, 1953. It has been described from two specimens only by Manter & Prince in 1953;Manter, H. W. & Prince, D. F. 1953: Some Monogenetic Trematodes of marine fishes from Fiji. Proceedings of the Helminthological Society of Washington, 20, 105-112. of these, a single specimen, the holotype has been kept in the US National Parasite Collections and thus was the single specimen of the species, and therefore of the genus, which was available for study. Later, another species of the same genus was described. ''L. fijiensis'' has been found only off Fiji by Manter & Prince in 1953 (the material of the original description, hence the Latin species name, ''fijiensis'', meaning "from Fiji") and alleg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sclerite
A sclerite (Greek , ', meaning "hard") is a hardened body part. In various branches of biology the term is applied to various structures, but not as a rule to vertebrate anatomical features such as bones and teeth. Instead it refers most commonly to the hardened parts of arthropod exoskeletons and the internal spicules of invertebrates such as certain sponges and soft corals. In paleontology, a scleritome is the complete set of sclerites of an organism, often all that is known from fossil invertebrates. Sclerites in combination Sclerites may occur practically isolated in an organism, such as the sting of a cone shell. Also, they can be more or less scattered, such as tufts of defensive sharp, mineralised bristles as in many marine Polychaetes. Or, they can occur as structured, but unconnected or loosely connected arrays, such as the mineral "teeth" in the radula of many Mollusca, the valves of Chitons, the beak of Cephalopod, or the articulated exoskeletons of Arthropoda. When ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oscar Werner Tiegs
Oscar Werner Tiegs FRS FAA (12 March 1897 – 5 November 1956) was an Australian zoologist whose career spanned the first half of the 20th century. His contribution to the division of the phylum arthropoda into two parts, one including insects, myriapods, and velvet worms, and the other including trilobites, crustaceans, and arachnids, is considered to be an important contribution to zoology. He was acknowledged as having a remarkable ability for apt and beautiful drawings, and as being an excellent microscopist, as having a great capacity for meticulous accuracy, persistent work, and shrewd elicitation of relationships from massive detail. He is considered one of Australia's great zoologists and as having a permanent place in the history of zoology. He was a Doctor of Science (University of Adelaide), a Fellow of the Royal Society, and a founding Fellow of the Australian Academy of Science. Early life and education Oscar Tiegs' father, Prussian born Otto Theodor Carl Tiegs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Harvey Johnston
Thomas Harvey Johnston (9 December 1881 – 30 August 1951) was an Australian biologist and parasitologist. He championed the efforts to eradicate the invasive prickly pear. Life and times Johnston was born in 1881 at Balmain, Sydney, Australia the son of Thomas Johnston, an Irish-born foreman mason, and his Australian-born wife Mary, née McLeod. On 1 January 1907, Johnston married Alice Maude Pearce at Petersham, New South Wales, Australia. On 30 August 1951, he died of coronary thrombosis at Adelaide, South Australia. He was survived by his wife and daughter. His son predeceased him. He was cremated.Cleland, J. B. (1952). Thomas Harvey Johnston. The Medical Journal of Australia. 1(12): 422.Editor. (2009). Johnston, T. Harvey, (Thomas Harvey). Trove. National Library of Australia. Academic career Johnston attended Sydney Teachers College and received the Jones Memorial Medal. He then attended the University of Sydney and earned a BA in 1906, the BSc and MA in 1907 and recei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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