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Parascylliidae
Parascylliidae, or the collared carpet sharks, is a family of sharks in the order Orectolobiformes, which are only found in shallow waters of the western Pacific. The family Parascylliidae contains two genera, '' Cirrhoscyllium'' and '' Parascyllium''. They are relatively small sharks, with the largest species reaching no more than 91.0 cm in adult length. They have elongated, slender bodies, cat-like eyes, and barbels behind their chins. They feed on small fish and invertebrates. The oldest known member of the group is the stem group-parascyllid †'' Pararhincodon'' Herman ''in'' Cappetta, 1976, which is known from the Albian to the Lutetian The Lutetian is, in the geologic timescale, a stage (stratigraphy), stage or age (geology), age in the Eocene. It spans the time between . The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it .... Although known primarily from teeth, two taxa (''P. lehmani'' and ''P. torquis'') ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orectolobiformes
Carpet sharks are sharks classified in the order (biology), order Orectolobiformes . Sometimes the common name "carpet shark" (given because many species resemble ornately patterned carpets) is used interchangeably with "wobbegong", which is the common name of sharks in the family Orectolobidae. Carpet sharks have five gill slits, two spineless dorsal fins, and a small mouth that does not extend past the eyes. Many species have barbel (anatomy), barbels. Characteristics The carpet sharks are a diverse group of sharks with differing sizes, appearances, diets, and habits. They first appeared in the fossil record in the Early Jurassic; the oldest known orectolobiform genera are ''Folipistrix'' (known from Toarcian to Aalenian of Belgium and Germany), ''Palaeobrachaelurus'' (Aalenian to Barremian) and ''Annea (fish), Annea'' (Toarcian to Bajocian of Europe). All species have two dorsal fins and a relatively short, transverse mouth that does not extend behind the eyes. Besides the nost ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parascylliidae
Parascylliidae, or the collared carpet sharks, is a family of sharks in the order Orectolobiformes, which are only found in shallow waters of the western Pacific. The family Parascylliidae contains two genera, '' Cirrhoscyllium'' and '' Parascyllium''. They are relatively small sharks, with the largest species reaching no more than 91.0 cm in adult length. They have elongated, slender bodies, cat-like eyes, and barbels behind their chins. They feed on small fish and invertebrates. The oldest known member of the group is the stem group-parascyllid †'' Pararhincodon'' Herman ''in'' Cappetta, 1976, which is known from the Albian to the Lutetian The Lutetian is, in the geologic timescale, a stage (stratigraphy), stage or age (geology), age in the Eocene. It spans the time between . The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it .... Although known primarily from teeth, two taxa (''P. lehmani'' and ''P. torquis'') ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cirrhoscyllium
''Cirrhoscyllium'' is a genus of carpetsharks in the family Parascylliidae. Species in the genus Cirrhoscyllium have throat barbels which are believed to act as tactile sensory organ A sense is a biological system used by an organism for sensation, the process of gathering information about the surroundings through the detection of stimuli. Although, in some cultures, five human senses were traditionally identified as su ..., detecting movement or changes in water flow. Species * '' Cirrhoscyllium expolitum'' H. M. Smith & Radcliffe, 1913 (barbelthroat carpetshark) * '' Cirrhoscyllium formosanum'' Teng, 1959 (Taiwan saddled carpetshark) * '' Cirrhoscyllium japonicum'' Kamohara, 1943 (saddle carpetshark) References Sources * Parascylliidae Shark genera Taxa named by Hugh McCormick Smith Taxa named by Lewis Radcliffe {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parascyllium
''Parascyllium'' is a genus of carpetsharks in the family Parascylliidae. Species in this genus are distributed in waters around Australia. Species * '' Parascyllium collare'' E. P. Ramsay & Ogilby, 1888 (collared carpetshark) * '' Parascyllium elongatum'' Last & Stevens, 2008 (elongate carpetshark) * '' Parascyllium ferrugineum'' McCulloch, 1911 (rusty carpetshark) * '' Parascyllium sparsimaculatum'' T. Goto & Last A last is a mechanical form shaped like a human foot. It is used by shoemakers and cordwainers in the manufacture and repair of shoes. Lasts come in many styles and sizes, depending on the exact job they are designed for. Common variations ..., 2002 (ginger carpetshark) * '' Parascyllium variolatum'' A. H. A. Duméril, 1853 (necklace carpetshark) References Parascylliidae Shark genera Taxa named by Theodore Gill {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Sharks
Shark is the naming term of all members of Selachimorpha suborder in the subclass Elasmobranchii, in the class Chondrichthyes. The Elasmobranchii also include rays and skates; the Chondrichthyes also include Chimaeras. The first shark-like chondrichthyans appeared in the oceans 400 million years ago, developing into the crown group of sharks by the Early Jurassic. Listed below are extant species of shark. Sharks are spread across 557 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in alphabetical order. Also included is a field guide to place sharks into the correct order. Cow and frilled sharks (2 Families) * ORDER HEXANCHIFORMES ** Family Chlamydoselachidae (frilled sharks) *** Genus '' Chlamydoselachus'' Garman, 1884 **** '' Chlamydoselachus africana'' Ebert & L. J. V. Compagno, 2009 (Southern African frilled shark) **** '' Chlamydoselachus anguineus'' Garman, 1884 (frilled shark) ** Family Hexanchidae (cow shark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theodore Gill
Theodore Nicholas Gill (March 21, 1837 – September 25, 1914) was an American ichthyologist, mammalogist, malacologist, and librarian. Career Born and educated in New York City under private tutors, Gill early showed interest in natural history. He was associated with J. Carson Brevoort in the arrangement of the latter's entomological and ichthyological collections before going to Washington, DC, in 1863 to work at the Smithsonian Institution. He catalogued mammals, fishes, and mollusks most particularly, although he maintained proficiency in other orders of animals. He was librarian at the Smithsonian and also senior assistant to the Library of Congress. He was elected as a member of the American Philosophical Society in 1867. Gill was professor of zoology at George Washington University. He was also a member of the Megatherium Club at the Smithsonian Institution in Washington, DC. Fellow members frequently mocked him for his vanity. He was president of the American Asso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albian
The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/series (stratigraphy), Series. Its approximate time range is 113.0 ± 1.0 annum, Ma to 100.5 ± 0.9 Ma (million years ago). The Albian is preceded by the Aptian and followed by the Cenomanian. Stratigraphic definitions The Albian Stage was first proposed in 1842 by Alcide d'Orbigny. It was named after Alba, the Latin name for Aube (river), River Aube in France. A Global Boundary Stratotype Section and Point (GSSP), ratified by the IUGS in 2016, defines the base of the Albian as the first occurrence of the planktonic foraminiferan ''Hedbergellidae, Microhedbergella renilaevis'' at the Col de Pré-Guittard section, Arnayon, Drôme, France. The top of the Albian Stage (the base of the Cenomanian Stage and Upper Cretaceous Series) is defined ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark Families
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] |
Lutetian
The Lutetian is, in the geologic timescale, a stage (stratigraphy), stage or age (geology), age in the Eocene. It spans the time between . The Lutetian is preceded by the Ypresian and is followed by the Bartonian. Together with the Bartonian it is sometimes referred to as the Middle Eocene Subepoch. Stratigraphic definition The Lutetian was named after Lutetia, the Latin language, Latin name for the city of Paris. The Lutetian Stage was introduced in scientific literature by French geologist Albert de Lapparent in 1883 and revised by A. Blondeau in 1981. The base of the Lutetian Stage is at the first appearance of the nanofossil ''Blackites inflatus'', according to an official reference profile (GSSP) established in 2011. Of two candidates located in Spain, the Gorrondatxe section was chosen.See thwebsite of Eustoquio Molinafor these candidates. The top of the Lutetian (the base of the Bartonian) is at the first appearance of calcareous nannofossils, calcareous nanoplankton s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Cappetta
Henri Cappetta (August 29, 1946 – January 6, 2024) was a French ichthyologist specializing in the paleontology of sharks and rays. He was a managing director at the Institut des Sciences de l'Evolution in the University of Montpellier The University of Montpellier () is a public university, public research university located in Montpellier, in south-east of France. Established in 1220, the University of Montpellier is one of the List of oldest universities in continuous opera .... References * H. Cappetta, Handbook of Paleoichthyology (Gustav Fischer, 1987) External links Henri Cappetta on www.isem.cnrs.fr(French) New sharks and rays from the Cenomanian and Turonian of Charentes, France. Romain Vullo, Henri Cappetta and Didier Néraudeau, Acta Palaeontol. Pol. 52 (1), pp. 99–116, 2007 French ichthyologists 1946 births 2024 deaths {{France-zoologist-stub Academic staff of the University of Montpellier 20th-century French zoologists 21st-century French zoologist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stem Group
In phylogenetics, the crown group or crown assemblage is a collection of species composed of the living representatives of the collection, the most recent common ancestor of the collection, and all descendants of the most recent common ancestor. It is thus a way of defining a clade, a group consisting of a species and all its extant or extinct descendants. For example, Neornithes (birds) can be defined as a crown group, which includes the most recent common ancestor of all modern birds, and all of its extant or extinct descendants. The concept was developed by Willi Hennig, the formulator of phylogenetic systematics, as a way of classifying living organisms relative to their extinct relatives in his "Die Stammesgeschichte der Insekten", and the "crown" and "stem" group terminology was coined by R. P. S. Jefferies in 1979. Though formulated in the 1970s, the term was not commonly used until its reintroduction in 2000 by Graham Budd and Sören Jensen. Contents of the crown ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
