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Terranova (roundworm)
''Terranova'' is a genus of parasitic nematodes. Species from this genus are known to parasitise sharks, rays, sawfishes, teleosts and crocodilians.Sprent, J.F.A. (1992"Parasites lost?"'' International Journal for Parasitology'' 22(2): 139-151. doi: 10.1016/0020-7519(92)90095-3 However, in 2020, František Moravec and Jean-Lou Justine considered this taxon to be invalid on the ground that "its type species . e., ''T. antarctica''has been designated a ''species inquirenda''", and split many of its species into two new-described genera, ''Euterranova ''Euterranova'' is a genus of parasitic nematodes that have life cycles involving elasmobranchs. The genus was created in 2020 to accommodate species which were previously included in'' Terranova'' Leiper & Atkinson, 1914 Leiper RT, Atkinson EL ...'' and '' Neoterranova''. The type specimen and so far only found adult individual available for feature classification of ''T. antarctica'' is a female, and many features for su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Thomson Leiper
Robert Thomson Leiper (17 April 1881 – 21 May 1969) FRS CMG was a British parasitologist and helminthologist. Early life and education Leiper was born on 17 April 1881 in Witch Road, Kilmarnock, Scotland; the eldest of three children of John Leiper (died 1895), tailor, and his wife, Jessie Aird. The family moved to England shortly after he was born. He was educated at Warwick School, spending time at the Warwick Technical College to further his studies in science. He spent a year at Mason Science College (which later became the University of Birmingham), matriculating in physics, mathematics, English and Latin. He then entered the University of Glasgow to study medicine, at which he excelled, winning awards such as the John Hunter Medal and the Senior Arnott Prize in the field; graduating in 1904. Career From an early age Leiper was devoted to helminthology, the study of parasitic flatworms; while still an undergraduate, at the age of 21, he discovered an undocumented tu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euterranova
''Euterranova'' is a genus of parasitic nematodes that have life cycles involving elasmobranchs. The genus was created in 2020 to accommodate species which were previously included in'' Terranova'' Leiper & Atkinson, 1914 Leiper RT, Atkinson EL. 1914. Helminths of the British Antarctic Expedition, 1910–1913. Proceedings of the Zoological Society of London, pp. 222–226 a taxon considered to be invalid. Etymology The name ''Euterranova'' is composed of ''Terranova'' (the name of a nematode genus) and the prefix ''Eu-'' (= proper, true). The gender is feminine. Species The type-species is ''E. dentiduplicata'' Moravec & Justine, 2020. It was described in 2020 from specimens from the stomach of the Zebra shark '' Stegostoma fasciatum'', collected from off New Caledonia New Caledonia ( ; ) is a group of islands in the southwest Pacific Ocean, southwest of Vanuatu and east of Australia. Located from Metropolitan France, it forms a Overseas France#Sui generis collec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neoterranova
''Neoterranova'' is a genus of parasitic nematodes that have life cycles involving sharks and reptiles. The genus was created in 2020 to accommodate species which were previously included in'' Terranova'' Leiper & Atkinson, 1914 Leiper RT, Atkinson EL. 1914. Helminths of the British Antarctic Expedition, 1910–1913. Proceedings of the Zoological Society of London, pp. 222–226 a taxon considered to be invalid. Etymology The name ''Neoterranova'' is composed of ''Terranova'' (the name of a nematode genus) and the prefix ''Neo-'' (= new). The gender is feminine. Species The type-species is ''N. scoliodontis'' (Baylis, 1931) Moravec & Justine, 2020. It is a parasite of the stomach and intestine of the Tiger shark '' Galeocerdo cuvier'', first described in 1931.Baylis HA. 1931. Some Ascaridae from Queensland. Annals and Magazine of Natural History, Series, 10(8), 95–102. Other species are listed in the taxobox. See also ''Euterranova ''Euterranova'' is a genus of paras ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. Phylogeneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasitic Nematodes
The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (helminths) are the cause of soil-transmitted helminthiases. They are classified along with arthropods, tardigrades and other moulting animals in the clade Ecdysozoa. Unlike the flatworms, nematodes have a tubular digestive system, with openings at both ends. Like tardigrades, they have a reduced number of Hox genes, but their sister phylum Nematomorpha has kept the ancestral protostome Hox genotype, which shows that the reduction has occurred within the nematode phylum. Nematode species can be difficult to distinguish from one another. Consequently, estimates of the number of nematode species are uncertain. A 2013 survey of animal biodiversity suggested there are over 25,000. Estimates of the total number of extant species are subject to eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharks
Sharks are a group of elasmobranch cartilaginous fish characterized by a ribless endoskeleton, dermal denticles, five to seven gill slits on each side, and pectoral fins that are not fused to the head. Modern sharks are classified within the Division (taxonomy), division Selachii and are the sister group to the Batoidea, Batomorphi (Batoidea, rays and skate (fish), skates). Some sources extend the term "shark" as an informal category including Extinction, extinct members of Chondrichthyes (cartilaginous fish) with a shark-like morphology, such as hybodonts. Shark-like chondrichthyans such as ''Cladoselache'' and ''Doliodus'' first appeared in the Devonian Period (419–359 million years), though some fossilized chondrichthyan-like scales are as old as the Ordovician, Late Ordovician (458–444 million years ago). The earliest confirmed modern sharks (Selachii) are known from the Early Jurassic around , with the oldest known member being ''Agaleus'', though records of true shar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray (fish)
Batomorphi is a division of cartilaginous fishes, commonly known as rays, this taxon is also known as the superorder Batoidea, but the 5th edition of ''Fishes of the World'' classifies it as the division Batomorphi. They and their close relatives, the sharks, compose the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces. Anatomy Batomorphs are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batomorphs have five ventral slot-like body openings called gill slits that lead from the gills, but the Hexatrygonidae have six. Batomorph gill slits lie under the pectoral fins on the underside, whereas a shark's are on the sides of the head. Most batomorphs have a flat, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sawfishes
Sawfish, also known as carpenter sharks, are a Family (biology), family of very large batoidea, rays characterized by a long, narrow, flattened rostrum (anatomy), rostrum, or nose extension, lined with sharp transverse plane, transverse teeth, arranged in a way that resembles a saw. They are among the List of largest fish, largest fish, with some species reaching lengths of about . They are found worldwide in tropical and subtropical regions in coastal Seawater, marine and brackish estuarine waters, as well as freshwater rivers and lakes. All species are critically endangered. They should not be confused with sawsharks (order Pristiophoriformes) or the extinct Sclerorhynchoidei, sclerorhynchoids (order Rajiformes) which have a similar appearance, or swordfish (family Xiphiidae) which have a similar name but a very different appearance. Sawfishes are relatively slow breeders and the females give birth to live young. They feed on fish and invertebrates that are detected and capt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teleosts
Teleostei (; Greek ''teleios'' "complete" + ''osteon'' "bone"), members of which are known as teleosts (), is, by far, the largest group of ray-finned fishes (class Actinopterygii), with 96% of all extant species of fish. The Teleostei, which is variously considered a division or an infraclass in different taxonomic systems, include over 26,000 species that are arranged in about 40 orders and 448 families. Teleosts range from giant oarfish measuring or more, and ocean sunfish weighing over , to the minute male anglerfish ''Photocorynus spiniceps'', just long. Including not only torpedo-shaped fish built for speed, teleosts can be flattened vertically or horizontally, be elongated cylinders or take specialised shapes as in anglerfish and seahorses. The difference between teleosts and other bony fish lies mainly in their jaw bones; teleosts have a movable premaxilla and corresponding modifications in the jaw musculature which make it possible for them to protrude their jaw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crocodilians
Crocodilia () is an order of semiaquatic, predatory reptiles that are known as crocodilians. They first appeared during the Late Cretaceous and are the closest living relatives of birds. Crocodilians are a type of crocodylomorph pseudosuchian, a subset of archosaurs that appeared about 235 million years ago and were the only survivors of the Triassic–Jurassic extinction event. While other crocodylomorph groups further survived the Cretaceous–Paleogene extinction event, notably sebecosuchians, only the crocodilians have survived into the Quaternary. The order includes the true crocodiles (family Crocodylidae), the alligators and caimans (family Alligatoridae), and the gharial and false gharial (family Gavialidae). Although the term "crocodiles" is sometimes used to refer to all of these families, the term "crocodilians" is less ambiguous. Extant crocodilians have flat heads with long snouts and tails that are compressed on the sides, with their eyes, ears, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Journal For Parasitology
The ''International Journal for Parasitology'' is an international medical journal published for the Australian Society for Parasitology by Elsevier. The journal includes original research articles, reviews, and commentary relating to parasites Parasitism is a close relationship between species, where one organism, the parasite, lives (at least some of the time) on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The en ... and their host interactions. External links * Australian Society for Parasitology Parasitology journals Academic journals established in 1971 Elsevier academic journals English-language journals Journals published between 13 and 25 times per year {{med-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Lou Justine
Jean-Lou Justine (born 1955), French parasitologist and zoologist, is a professor at the National Museum of Natural History (France), National Museum of Natural History in Paris, France, and a specialist of fish parasites and invasive species, invasive land planarians. Higher education and career Justine was in high school in Saint-Raphaël, Var, Saint Raphaël, France, then an undergraduate student at the University of Nice Sophia Antipolis, University of Nice (1972–1976), and at the École Normale Supérieure in Saint-Cloud after which he passed the ''Agrégation'' in 1977, and finally a graduate student at the University of Montpellier. He passed his PhD in 1980 and his ''Doctorat d'État'' (State doctorate) in 1985, both in the University of Montpellier, under the supervision of Professors Xavier Mattei and Louis Euzet. From 1978 to 1985, Justine was ''Assistant'' then ''Maître-Assistant'' (assistant professor) at the University of Dakar, Senegal. He entered the National M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
