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Eastern Pacific Black Ghostshark
The Eastern Pacific black ghostshark (''Hydrolagus melanophasma'', literally a combination of "water rabbit" and "black ghost") is a species of fish in the family Chimaeridae.Carlos Bustamante, Hernán Flores, Yhon Concha-Pérez, Carolina Vargas-Caro, Julio Lamilla & Mike Bennett''First record of Hydrolagus melanophasma James, Ebert, Long & Didier, 2009 (Chondrichthyes, Chimaeriformes, Holocephali) from the southeastern Pacific Ocean'' Lat. Am. J. Aquat. Res. vol.40 no.1 Valparaíso Mar. 2012 Despite its name, it does not belong to the clade Selachii used for the modern classification of sharks. It is, however, distantly related to the sharks in the sense that both are Chondrichthyes (cartilaginous fishes). References External links *Greg Laden Gregory Thomas Laden is an American biological anthropologist and science blogger. Education Born in 1958, Laden received his B.A. from the University of the State of New York's Regents College program in 1984, and his M.A. and Ph.D. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chimaeridae
The Chimaeridae, or short-nosed chimaeras, are a family (biology), family of cartilaginous fish. They resemble other Chimaeriformes, chimaeras in general form and habits, but have short, rounded snouts, without the modifications found in related families. Many species have long, tapering tails, giving them an alternative name of ratfish. Shortnose Chimaera, chimaeras have a venomous spine on their backs, which is sufficiently dangerous to injure humans. They are found in temperate and tropical marine waters worldwide. Most species are restricted to depths below , but a few, notably the spotted ratfish and rabbit fish, can locally be found at relatively shallow depths. They range from in maximum total length, depending on species. Species The species are grouped into two genera and include: Family Chimaeridae * Genus ''Chimaera (genus), Chimaera'' Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758 (Eocene-Recent) ** ''Chimaera argiloba'' Peter R. Last, Last, Will ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Julio Lamilla
Julio Francisco Lamilla Gómez (1954 – 31 March 2016) was a Chilean biologist, researcher and conservationist. Lamilla was a former student of Liceo Armando Robles Rivera in Valdivia before graduating from the Austral University of Chile in Biology and Chemistry in which he majored in Zoology. He became a teacher and researcher at the university in 1979 and held numerous posts through his life as a conservationist and shark expert. He died of a heart attack A myocardial infarction (MI), commonly known as a heart attack, occurs when Ischemia, blood flow decreases or stops in one of the coronary arteries of the heart, causing infarction (tissue death) to the heart muscle. The most common symptom ... in March 2016. '' Dipturus lamillai'', a species of skate first described in 2019, was named in Lamilla's honour. References 1954 births 2016 deaths Academic staff of the Austral University of Chile Chilean marine biologists People from Valdivia Austral University ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clade
In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach to taxonomy adopted by most biological fields. The common ancestor may be an individual, a population, or a species (extinct or Extant taxon, extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed ''monophyletic'' (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming Taxon, taxa that are not clades; that is, taxa that are not Monophyly, monophyletic. Some of the relationships between organisms that the molecul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selachii
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 Selachii and are the sister group to the Batomorphi ( rays and skates). Some sources extend the term "shark" as an informal category including 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 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 sharks may extend back as far as the Permian. Sharks range in size from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondrichthyes
Chondrichthyes (; ) is a class of jawed fish that contains the cartilaginous fish or chondrichthyans, which all have skeletons primarily composed of cartilage. They can be contrasted with the Osteichthyes or ''bony fish'', which have skeletons primarily composed of bone tissue. Chondrichthyes are aquatic vertebrates with paired fins, paired nares, placoid scales, conus arteriosus in the heart, and a lack of opercula and swim bladders. Within the infraphylum Gnathostomata, cartilaginous fishes are distinct from all other jawed vertebrates. The class is divided into two subclasses: Elasmobranchii (sharks, rays, skates and sawfish) and Holocephali ( chimaeras, sometimes called ghost sharks, which are sometimes separated into their own class). Extant chondrichthyans range in size from the finless sleeper ray to the over whale shark. Anatomy Skeleton The skeleton is cartilaginous. The notochord is gradually replaced by a vertebral column during development, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greg Laden
Gregory Thomas Laden is an American biological anthropologist and science blogger. Education Born in 1958, Laden received his B.A. from the University of the State of New York's Regents College program in 1984, and his M.A. and Ph.D. from Harvard University in 1987 and 1992, respectively, where he was advised by Irven DeVore. Career Laden has taught at multiple institutions, including, but not limited to, Harvard, the University of Minnesota, and Century College. In 1999, when he was on the faculty of the University of Minnesota, he co-authored a study in ''Current Anthropology'' that found that the practice of humans cooking food evolved because it allowed them to cook vegetables. He published a blog, "Greg Laden's Blog", on ScienceBlogs, where he focused on public controversies regarding multiple scientific topics, including global warming and evolution Evolution is the change in the heritable Phenotypic trait, characteristics of biological populations over successive g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrolagus
''Hydrolagus'' is a genus of fish in the family (biology), family Chimaeridae found in the Atlantic Ocean, Atlantic, Indian Ocean, Indian and Pacific Oceans.Weigmann, S. (2016)Annotated checklist of the living sharks, batoids and chimaeras (Chondrichthyes) of the world, with a focus on biogeographical diversity.''Journal of Fish Biology, 88 (3): 837-1037.'' Species The 22 recognized species in this genus are: * ''Hydrolagus affinis'' (Félix António de Brito Capello, Brito Capello (:pt:Félix António de Brito Capelo, pt), 1868) (small-eyed rabbitfish) * ''Hydrolagus africanus'' (John Dow Fisher Gilchrist, Gilchrist, 1922) (African chimaera) Walovich, K.A., Ebert, D.A., Long, D.J. & Didier, D.A. (2015)Redescription of ''Hydrolagus africanus'' (Gilchrist, 1922) (Chimaeriformes: Chimaeridae), with a review of southern African chimaeroids and a key to their identification.''African Journal of Marine Science, 37 (2): 157-165.'' * ''Hydrolagus alberti'' Henry Bryant Bigelow, Bigelow & ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Western American Coastal Fauna
Western may refer to: Places *Western, Nebraska, a village in the US *Western, New York, a town in the US *Western Creek, Tasmania, a locality in Australia * Western Junction, Tasmania, a locality in Australia *Western world, countries that identify with shared "Western" culture *Western United States, a region of the United States Arts and entertainment Films * ''Western'' (1997 film), a French road movie directed by Manuel Poirier * ''Western'' (2017 film), a German-Austrian film Genres *Western (genre), a category of fiction and visual art centered on the American Old West **Western fiction, the Western genre as featured in literature **Western film, the western genre in film **Western music (North America), a type of American folk music Music * ''Westerns'' (EP), an EP by Pete Yorn *WSTRN, a British hip hop group from west London *"Western" a song by Black Midi from ''Schlagenheim'' Business * The Western, a closed hotel/casino in Las Vegas, United States *Western Cart ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
