|
Dichichthys
''Dichichthys'' is a genus of sharks which is the only genus in the monotypic Family (biology), family Dichichthyidae, the bristle sharks. These sharks are found in the Western Pacific Ocean. Until recently, scientists believed these 5 species were part of the genus ''Parmaturus,'' until morphological testing confirmed its placement in its own family. Supraorbital crests on the chondrocranium also distinguish ''Dichichthys'' from other catshark genera/families. Species ''Dichichthys'' contains the following five recognised valid species: * ''Dichichthys albimarginatus'' (Bernard Séret, Séret & Peter R. Last, Last, 2007) (Whitetip bristle shark) * ''Beige catshark, Dichichthys bigus'' (Séret & Last, 2007) (Beige bristle shark) * ''Dichichthys melanobranchus'' (W. L. Chan, 1966) (Blackgill catshark) * ''Dichichthys nigripalatum'' (Fahmi Fhami, Fahmi & David A. Ebert, Ebert, 2018) (Indonesian filetail catshark) * ''Dichichthys satoi'' William Toby White, (White, Andrew L. Stewart, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichichthys Nigripalatum
''Dichichthys'' is a genus of sharks which is the only genus in the monotypic family Dichichthyidae, the bristle sharks. These sharks are found in the Western Pacific Ocean. Until recently, scientists believed these 5 species were part of the genus ''Parmaturus,'' until morphological testing confirmed its placement in its own family. Supraorbital crests on the chondrocranium also distinguish ''Dichichthys'' from other catshark genera/families. Species ''Dichichthys'' contains the following five recognised valid species: * '' Dichichthys albimarginatus'' ( Séret & Last, 2007) (Whitetip bristle shark) * '' Dichichthys bigus'' (Séret & Last, 2007) (Beige bristle shark) * '' Dichichthys melanobranchus'' (W. L. Chan, 1966) (Blackgill catshark) * '' Dichichthys nigripalatum'' (Fahmi & Ebert, 2018) (Indonesian filetail catshark) * '' Dichichthys satoi'' (White, Stewart, O'Neill The O'Neill dynasty ( Irish: ''Ó Néill'') are a lineage of Irish Gaelic origin that held prominent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beige Catshark
The beige catshark (''Dichichthys bigus''), or beige bristle shark, is a bristle shark of the family Dichichthyidae, The first recorded specimen was a female recorded off the coast of Queensland, Australia around Lord Howe Island. Its length was 72 cm. Recently, a number of both male and female specimens (unpublished data) were captured in the waters off New Zealand, at the edge of the EEZ (exclusive economic zone). In 2024, the first footage of this shark was captured by the ROV ''SuBastian'' during Coral Sea surveys at Southern Small Detached Reef, Queensland. To date, very little is known about the ecology of this species. Scientists are currently studying the sensory systems of this catshark in order to reveal information about its ecology and ultimately behaviour. The reproduction of the beige catshark is oviparous Oviparous animals are animals that reproduce by depositing fertilized zygotes outside the body (i.e., by laying or spawning) in metabolically independe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichichthys Melanobranchus
The blackgill catshark or blackgill bristle shark (''Dichichthys melanobranchus'') is a deep water bristle shark known from very few specimens, found on or near the bottom on the continental slope, at off the coasts of China and Japan. Specimens can attain a total length of at least , have elongated cat-like eyes, and have two small dorsal fins set far back. They’re oviparous and lay one egg at a time. This shark is a potential bycatch Bycatch (or by-catch), in the fishing industry, is a fish or other marine species that is caught unintentionally while fishing for specific species or sizes of wildlife. Bycatch is either the wrong species, the wrong sex, or is undersized or juve ... of deep water bottom-trawl fisheries operating within its range, but no specific information is available. In the upper jaw, there are rods of blunt, flat teeth with 3 cusps, likely used for crushing, as well as row of sharper teeth with the mid, central cusp longer and to a point. The bottom te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichichthys Satoi
The roughback bristle shark (''Dichichthys satoi'') is a species of bristle shark of the newly discovered Dichichthyidae ''Dichichthys'' is a genus of sharks which is the only genus in the monotypic family Dichichthyidae, the bristle sharks. These sharks are found in the Western Pacific Ocean. Until recently, scientists believed these 5 species were part of the gen ... family, and was discovered in 2024. The species can reach a length of . The roughback bristle shark lives off the waters of New Zealand, at a depth of between . References Taxa named by William Toby White Taxa named by Andrew L. Stewart Taxa named by Gavin J.P. Naylor Fish described in 2024 Dichichthys {{Shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichichthys Albimarginatus
The white-tip catshark or white-tip bristle shark (''Dichichthys albimarginatus'') is a recently described, deepwater bristle shark, known only from a single specimen collected from northern 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 collectivity, ''sui generis'' collectivity of t ..., at a depth of 590–732 m. The only known specimen, an adult male, measured a total of 57.7 cm in length. These sharks have spiracles, which are respiratory openings behind the eyes. They are also recognized by two little dorsal fins. Numerous individuals from this group of sharks are likewise called dogfish. References white-tip catshark Fish of New Caledonia white-tip catshark {{shark-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shark
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] |
Monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family (, : ) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". The delineation of what constitutes a family—or whether a described family should be acknowledged—is established and decided upon by active taxonomists. There are not strict regulations for outlining or acknowledging a family, yet in the realm of plants, these classifications often rely on both the vegetative and reproductive characteristics of plant species. Taxonomists frequently hold varying perspectives on these descriptions, leading to a lack of widespread consensus within the scientific community ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parmaturus
''Parmaturus'' is a genus of deepwater catsharks in the Family (biology), family Pentanchidae. Four species were described in 2007 and another in 2019 with more species likely to be described in the near future. Species The following are the currently described species: * ''White-clasper catshark, Parmaturus albipenis'' Bernard Séret, Séret & Peter R. Last, Last, 2007 (white-clasper catshark) * ''Brazilian filetail catshark, Parmaturus angelae'' (Brazilian filetail catshark) * ''Campeche catshark, Parmaturus campechiensis'' Stewart Springer, S. Springer, 1979 (Campeche catshark) * ''Velvet catshark, Parmaturus lanatus'' Séret & Last, 2007 (velvet catshark) * ''McMillan's catshark, Parmaturus macmillani'' Graham S. Hardy, Hardy, 1985 (McMillan's catshark) * ''Salamander shark, Parmaturus pilosus'' Samuel Garman, Garman, 1906 (salamander shark) * ''Filetail catshark, Parmaturus xaniurus'' (Charles Henry Gilbert, C. H. Gilbert, 1892) (filetail catshark) There are several as yet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andrew L
Andrew is the English form of the given name, common in many countries. The word is derived from the , ''Andreas'', itself related to ''aner/andros'', "man" (as opposed to "woman"), thus meaning "manly" and, as consequence, "brave", "strong", "courageous", and "warrior". In the King James Bible, the Greek "Ἀνδρέας" is translated as Andrew. Popularity In the 1990s, it was among the top ten most popular names given to boys in English-speaking countries. Australia In 2000, the name Andrew was the second most popular name in Australia after James. In 1999, it was the 19th most common name, while in 1940, it was the 31st most common name. Andrew was the first most popular name given to boys in the Northern Territory in 2003 to 2015 and continuing. In Victoria, Andrew was the first most popular name for a boy in the 1970s. Canada Andrew was the 20th most popular name chosen for male infants in 2005. Andrew was the 16th most popular name for infants in British Columbia i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernard Séret
Bernard ('' Bernhard'') is a French and West Germanic masculine given name. It has West Germanic origin and is also a surname. The name is attested from at least the 9th century. West Germanic ''Bernhard'' is composed from the two elements ''bern'' "bear" and ''hard'' "brave, hardy". Its native Old English cognate was ''Beornheard'', which was replaced or merged with the French form ''Bernard'' that was brought to England after the Norman Conquest. The name ''Bernhard'' was notably popular among Old Frisian speakers. Its wider use was popularized due to Saint Bernhard of Clairvaux (canonized in 1174). In Ireland, the name was an anglicized form of Brian. Geographical distribution Bernard is the second most common surname in France. As of 2014, 42.2% of all known bearers of the surname ''Bernard'' were residents of France (frequency 1:392), 12.5% of the United States (1:7,203), 7.0% of Haiti (1:382), 6.6% of Tanzania (1:1,961), 4.8% of Canada (1:1,896), 3.6% of Nigeria (1:12,221 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
