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Louis-Félix Henneguy
Louis-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris. In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, ''Étude physiologique sur l'action des poisons''. In 1883 he obtained his agrégation with ''Les lichens utiles'', a thesis on useful lichens. During his career he was a professor of comparative embryology at the Collège de France (1900–28), and a member of the Académie de Médecine, the Académie d'Agriculture and the Académie des sciences (1908–28). From 1894 he was director of the journal, ''Archives d'anatomie microscopique''. He is known for his extensive research of ''phylloxera'', publishing a number of papers on means of destroying its eggs during the winter (1885, 1887–88). Also he performed studies on the natural history of the apple blossom weevil, proposing methods for its eradication (1891). On behalf of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis-Félix Henneguy
Louis-Félix Henneguy (18 March 1850 – 16 January 1928) was a French zoologist and embryologist born in Paris. In 1875, he received his medical doctorate from the University of Montpellier with a dissertation on the physiological action of poisons, ''Étude physiologique sur l'action des poisons''. In 1883 he obtained his agrégation with ''Les lichens utiles'', a thesis on useful lichens. During his career he was a professor of comparative embryology at the Collège de France (1900–28), and a member of the Académie de Médecine, the Académie d'Agriculture and the Académie des sciences (1908–28). From 1894 he was director of the journal, ''Archives d'anatomie microscopique''. He is known for his extensive research of ''phylloxera'', publishing a number of papers on means of destroying its eggs during the winter (1885, 1887–88). Also he performed studies on the natural history of the apple blossom weevil, proposing methods for its eradication (1891). On behalf of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mihály Lenhossék
Mihály Lenhossék, named often given as Michael von Lenhossék (28 August 1863 – 26 January 1937) was a Hungarian anatomist and histologist born in Budapest. He was the son of anatomist József Lenhossék (1818–1888) and an uncle to Albert Szent-Györgyi (1893–1986). In 1886, he obtained his medical doctorate at Budapest, afterwards working in his father's anatomical institute. In 1889 he became prosector at the University of Basel, later performing similar duties at the University of Würzburg (1892–95). Afterwards he was an associate professor of anatomy at the University of Tübingen, and from 1900 was a professor of anatomy at the University of Budapest. Lenhossék is largely remembered for his research in the field of neuroanatomy, that included important histological studies of the nervous system. In 1893 he coined the term "astrocyte" to describe a star-shaped cell found in the central nervous system. Associated terms * "Henneguy–Lenhossek theory": Theory that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bony Fishes
Osteichthyes (), popularly referred to as the bony fish, is a diverse superclass of fish that have skeletons primarily composed of bone tissue. They can be contrasted with the Chondrichthyes, which have skeletons primarily composed of cartilage. The vast majority of fish are members of Osteichthyes, which is an extremely diverse and abundant group consisting of 45 orders, and over 435 families and 28,000 species. It is the largest class of vertebrates in existence today. The group Osteichthyes is divided into the ray-finned fish (Actinopterygii) and lobe-finned fish (Sarcopterygii). The oldest known fossils of bony fish are about 425 million years old, which are also transitional fossils, showing a tooth pattern that is in between the tooth rows of sharks and bony fishes. Osteichthyes can be compared to Euteleostomi. In paleontology the terms are synonymous. In ichthyology the difference is that Euteleostomi presents a cladistic view which includes the terrestrial tetrap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Félix Alcan
Felix Mardochée Alcan (March 18, 1841 – February 18, 1925) was a French Jewish publisher and scholar, born in Metz. He was the grandson of Gerson Lévy, author of ''Orgue et Pioutim'', and son of Moyse Alcan, a well-known publisher at Metz. Having finished his studies at the lyceum of his native city, he entered the École Normale Supérieure of Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), ma ... in 1862. When he left it in 1865 he became a lecturer on mathematics till 1869, when he undertook the management of his father's publishing business at Metz. In 1872 he went to Paris, where in the following year he entered the old publishing-house of Germer-Baillière, of which he became the head in 1883. In 1880 he originated a series of school-books for use in the lyceums; this s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Société Entomologique De France
The Société entomologique de France, or French Entomological Society, is devoted to the study of insects. The society was founded in 1832 in Paris, France. The society was created by eighteen Parisian entomologists on January 31, 1832. The first (honorary) president was Pierre André Latreille (1762-1833) who was elected unanimously and established the goal of the society to contribute to and progress the development of entomology in all its aspects. The main publications of the society are ''Bulletin de la Société entomologique de France'', ''Annales de la Société entomologique de France Annals are a concise form of historical writing which record events chronologically, year by year. The equivalent word in Latin and French is ''annales'', which is used untranslated in English in various contexts. List of works with titles contai ...'' and, for a few years, ''L'Entomologiste, Revue d'Amateurs''. The library contains 15,000 volumes and 1,500 titles of old or current literat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean-Louis Fage
Jean-Louis Fage (30 September 1883, in Limoges – 1964, in Dijon) was a French marine biologist and arachnologist. A native of Limoges, he studied biology at the University of Paris, Sorbonne and in the laboratory at Saint-Vaast-la-Hougue. In 1906 he obtained his doctorate with a thesis on the nephridia of polychaetes. For the next fourteen years he served as a naturalist at the ''Observatoire océanologique de Banyuls-sur-Mer, Laboratoire de biologie marine'' in Banyuls-sur-Mer. From 1920 he worked in the zoology department at the ''Muséum national d'histoire naturelle'' in Paris, where in 1938 he succeeded Charles Joseph Gravier (1865–1937) as professor and director of the department of zoology (worms and crustaceans). Fage made contributions in the fields of carcinology (study of crustaceans), arachnology and speleology. In 1945 he was a founding member of the ''Commission de spéléologie'' (being part of the ''Centre national de la recherche scientifique'' – CNRS). He als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Édouard Chevreux
Édouard Chevreux (10 November 1846, in Paris – 10 January 1931, in Bône) was a French carcinologist. Chevreux specialised in the study of Amphipoda, an order of malacostracan crustaceans. With Jean-Louis Fage (1883–1964), he was co-author of the section on "Amphipodes" in the ''Faune de France''. The genera '' Chevreuxius'' and '' Chevreuxiella'' are named after him, as are numerous crustacean species. Selected writings * ''Sur le Gammarus berilloni catta'' * ''Voyage de la goëlette "Melita" aux Canaries et au Sénégal, 1889–1890'', (1891) – Voyage of the schooner "Melita" to the Canary Islands and Senegal, 1889–1890. * ''Amphipodes provenant des campagnes de l'Hirondelle (1885–1888)'', (1900) – Amphipods from the campaigns of the "Hirondelle" (1885–1888). * ''Paracyphocaris praedator; type d'un nouveau genre de Lysianassidae'', (1905) – "''Paracyphocaris praedator''"; the type of a new genus of Lysianassidae. * ''Amphipodes'', (1906) – Amphipods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henneguya Zschokkei
''Henneguya zschokkei'' or ''Henneguya salminicola'' is a species of a myxosporean endoparasite. It afflicts several salmon in the genus ''Oncorhynchus''. It causes milky flesh or tapioca disease. ''H. zschokkei'' is notable for its absence of mitochondria, mitochondrial DNA, aerobic respiration and its reliance on an as yet undiscovered energy metabolism. Description ''Henneguya salminicola'' is found in fish as an ovoid spore with two anterior polar capsules and two long caudal appendages. Individuals are very small (about 10 micrometers in diameter), but are found aggregated into cysts 3–6 mm in diameter at any place in the muscle mass. Unknown metabolism ''Henneguya salminicola'' is the only known multicellular animal that does not rely on the aerobic respiration of oxygen. It lacks a mitochondrial genome and therefore mitochondria, making it one of the only members of the eukaryotic animal kingdom to shun oxygen as the foundation of its metabolism. The means by w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protozoan
Protozoa (singular: protozoan or protozoon; alternative plural: protozoans) are a group of single-celled eukaryotes, either free-living or parasitic, that feed on organic matter such as other microorganisms or organic tissues and debris. Historically, protozoans were regarded as "one-celled animals", because they often possess animal-like behaviours, such as motility and predation, and lack a cell wall, as found in plants and many algae. When first introduced by Georg Goldfuss (originally spelled Goldfuß) in 1818, the taxon Protozoa was erected as a class within the Animalia, with the word 'protozoa' meaning "first animals". In later classification schemes it was elevated to a variety of higher ranks, including phylum, subkingdom and kingdom, and sometimes included within Protoctista or Protista. The approach of classifying Protozoa within the context of Animalia was widespread in the 19th and early 20th century, but not universal. By the 1970s, it became usual to require th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhytidocystis
''Rhytidocystis'' is a genus of apicomplexa The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic alveolates. Most of them possess a unique form of organelle that comprises a type of non-photosynthetic plastid called an apicoplast, and an apical complex structure. Th ...ns. It is the only genus within the monotypic family Rhytidocystidae. The species of this genus are parasitic protozoa found in marine annelids. Taxonomy There are four species known in this genus: * '' Rhytidocystis cyamus'' Rueckert & Leander 2009 * '' Rhytidocystis opheliae'' Henneguy 1907 * '' Rhytidocystis polygordiae'' * '' Rhytidocystis sthenelais'' Porchet-Henneré 1972 References Apicomplexa families Apicomplexa genera {{Apicomplexa-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apicomplexan
The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic alveolates. Most of them possess a unique form of organelle that comprises a type of non-photosynthetic plastid called an apicoplast, and an apical complex structure. The organelle is an adaptation that the apicomplexan applies in penetration of a host cell. The Apicomplexa are unicellular and spore-forming. All species are obligate endoparasites of animals, except '' Nephromyces'', a symbiont in marine animals, originally classified as a chytrid fungus. Motile structures such as flagella or pseudopods are present only in certain gamete stages. The Apicomplexa are a diverse group that includes organisms such as the coccidia, gregarines, piroplasms, haemogregarines, and plasmodia. Diseases caused by Apicomplexa include: * Babesiosis (''Babesia'') * Malaria (''Plasmodium'') * Cryptosporidiosis (''Cryptosporidium parvum'') * Cyclosporiasis (''Cyclospora cayetanensis'') * Cystoisosporiasis (''Cystoisospora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
