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Histoctopus
''Histoctopus'' is an octopus genus containing two species: '' Histoctopus zipkasae'', the type species, and '' Histoctopus discus''. The former is found in the south-west Pacific Ocean while the latter is found in the Indian Ocean. The three taxa were described in 2009 by Mark D. Norman, Renata Boucher-Rodoni and F. G. Hochberg in the '' Journal of Molluscan Studies''. The genus name is derived from ''octopus'' and the Greek word ''histos'', meaning "web" or "tissue", in reference to the membrane on the outside of the arms. The type species was named ''zipkasae'', "after the senior author's wonderful wife, Karen Zipkas", while the name of ''H. discus'' comes from the Latin ''discus'', meaning "plate", in reference to the large suckers. ''Histoctopus'' are small to medium-sized octopuses with an orange-brown colouration. Each muscular arm has two rows of large suckers. Nothing is known about the life history of either species. They are found at depths of between 200 and 750 met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Histoctopus Zipkasae
''Histoctopus'' is an octopus genus containing two species: '' Histoctopus zipkasae'', the type species, and '' Histoctopus discus''. The former is found in the south-west Pacific Ocean while the latter is found in the Indian Ocean. The three taxa were described in 2009 by Mark D. Norman, Renata Boucher-Rodoni and F. G. Hochberg in the '' Journal of Molluscan Studies''. The genus name is derived from ''octopus'' and the Greek word ''histos'', meaning "web" or "tissue", in reference to the membrane on the outside of the arms. The type species was named ''zipkasae'', "after the senior author's wonderful wife, Karen Zipkas", while the name of ''H. discus'' comes from the Latin ''discus'', meaning "plate", in reference to the large suckers. ''Histoctopus'' are small to medium-sized octopuses with an orange-brown colouration. Each muscular arm has two rows of large suckers. Nothing is known about the life history of either species. They are found at depths of between 200 and 750 met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Histoctopus Discus
''Histoctopus'' is an octopus genus containing two species: ''Histoctopus zipkasae'', the type species, and '' Histoctopus discus''. The former is found in the south-west Pacific Ocean while the latter is found in the Indian Ocean. The three taxa were described in 2009 by Mark D. Norman, Renata Boucher-Rodoni and F. G. Hochberg in the '' Journal of Molluscan Studies''. The genus name is derived from ''octopus'' and the Greek word ''histos'', meaning "web" or "tissue", in reference to the membrane on the outside of the arms. The type species was named ''zipkasae'', "after the senior author's wonderful wife, Karen Zipkas", while the name of ''H. discus'' comes from the Latin ''discus'', meaning "plate", in reference to the large suckers. ''Histoctopus'' are small to medium-sized octopuses with an orange-brown colouration. Each muscular arm has two rows of large suckers. Nothing is known about the life history of either species. They are found at depths of between 200 and 750 metr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopodidae
The Octopodidae comprise the family containing the majority of known octopus species. Genera The World Register of Marine Species lists these genera: *'' Abdopus'' Norman & Finn, 2001 *'' Ameloctopus'' Norman, 1992 *'' Amphioctopus'' P. Fischer, 1882 *'' Callistoctopus'' Taki, 1964 *'' Cistopus'' Gray, 1849 *'' Euaxoctopus'' Voss, 1971 *'' Galeoctopus'' Norman, Boucher & Hochberg, 2004 *'' Grimpella'' Robson, 1928 *'' Hapalochlaena'' Robson, 1929 *'' Histoctopus'' Norman, Boucher-Rodoni & Hochberg, 2009 *'' Lepidoctopus'' Haimovici & Sales, 2019 *'' Macrochlaena'' Robson, 1929 *''Macroctopus'' Robson, 1928 *'' Macrotritopus'' Grimpe, 1922 *''Octopus'' Cuvier, 1798 *'' Paroctopus'' Naef, 1923 *''Pinnoctopus ''Pinnoctopus'' is a genus of octopuses in the family (biology), family Octopodidae. It is of doubtful validity. Species * ''Pinnoctopus cordiformis'' (Jean René Constant Quoy, Quoy and Joseph Paul Gaimard, Gaimard, 1832. ''nomen dubium'' * '' ...'' d'Orbigny, 1845 *'' Pt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Velodona
''Velodona togata'' is a species of octopus in the monotypic genus ''Velodona''. First described by Carl Chun in 1915, with a second subspecies discovered by Guy Coburn Robson in 1924, it was named for the distinctive membranes on its arms. Described as being similar to members of the genera '' Pareledone'', ''Eledone'', and ''Enteroctopus'', ''V. togata'' has a large body with large eyes and extensive membranes that link the octopus' arms together. The species has a single line of suckers on each arm, and its head, mantle, and part of its arms are covered in warts. Although the reproductive habits of ''V. togata'' have not been extensively studied, the species is believed to be one of the most fecund among octopuses in its region and depth level, despite the species possessing large eggs and extremely large spermatophores. The species is found in the Indian Ocean, off the coast of South Africa, Mozambique, and Tanzania. The species has been captured from depths between 400 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Register Of Marine Species
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific specialists on each group of organism. These taxonomists control the quality of the information, which is gathered from the primary scientific literature as well as from some external regional and taxon-specific databases. WoRMS maintains valid names of all marine organisms, but also provides information on synonyms and invalid names. It is an ongoing task to maintain the registry, since new species are constantly being discovered and described by scientists; in addition, the nomenclature and taxonomy of existing species is often corrected or changed as new research is constantly being published. Subsets of WoRMS content are made available, and can have separate badging and their own home/launch pages, as "subregisters", such as the ''World List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Function (biology)
In evolutionary biology, function is the reason some object or process occurred in a system that evolved through natural selection. That reason is typically that it achieves some result, such as that chlorophyll helps to capture the energy of sunlight in photosynthesis. Hence, the organism that contains it is more likely to survive and reproduce, in other words the function increases the organism's fitness. A characteristic that assists in evolution is called an adaptation; other characteristics may be non-functional spandrels, though these in turn may later be co-opted by evolution to serve new functions. In biology, function has been defined in many ways. In physiology, it is simply what an organ, tissue, cell or molecule does. In the philosophy of biology, talk of function inevitably suggests some kind of teleological purpose, even though natural selection operates without any goal for the future. All the same, biologists often use teleological language as a shorthand for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convergent Evolution
Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is homoplasy. The recurrent evolution of flight is a classic example, as flying insects, birds, pterosaurs, and bats have independently evolved the useful capacity of flight. Functionally similar features that have arisen through convergent evolution are ''analogous'', whereas '' homologous'' structures or traits have a common origin but can have dissimilar functions. Bird, bat, and pterosaur wings are analogous structures, but their forelimbs are homologous, sharing an ancestral state despite serving different functions. The opposite of convergence is divergent evolution, where related species evolve different traits. Convergent evolution is similar to parallel evo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benthic Zone
The benthic zone is the ecological region at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. The name comes from ancient Greek, βένθος (bénthos), meaning "the depths." Organisms living in this zone are called benthos and include microorganisms (e.g., bacteria and fungi) as well as larger invertebrates, such as crustaceans and polychaetes. Organisms here generally live in close relationship with the substrate and many are permanently attached to the bottom. The benthic boundary layer, which includes the bottom layer of water and the uppermost layer of sediment directly influenced by the overlying water, is an integral part of the benthic zone, as it greatly influences the biological activity that takes place there. Examples of contact soil layers include sand bottoms, rocky outcrops, coral, and bay mud. Description Oceans The benthic region of the ocean begins at the shore line (intertida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteroctopus
''Pteroctopus'' is a genus of octopuses in the family Octopodidae. Species * ''Pteroctopus eurycephala'' * (Taki, 1964) * ''Pteroctopus hoylei'' (Berry, 1909) – Pacific Fourhorn Octopus * ''Pteroctopus keralensis'' * (Oommen, 1966) * '' Pteroctopus schmidti'' (Joubin, 1933) – Dana Octopus * ''Pteroctopus tetracirrhus'' (Delle Chiaje, 1830 in 1823-1831) – Fourhorn Octopus or Atlantic Fourhorn Octopus * '' Pteroctopus witjazi'' * Akimushkin, 1963 The species listed above with an asterisk (*) are ''taxon inquirendum In biological classification, a ''species inquirenda'' is a species of doubtful identity requiring further investigation. The use of the term in English-language biological literature dates back to at least the early nineteenth century. The term ...'' and need further study to determine if they are valid species or synonyms. References External links * Octopodidae Cephalopod genera {{octopus-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Graneledone
''Graneledone'' is a genus of octopuses in the family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ... Octopodidae. The type species is ''Eledone verrucosa'' Verrill, 1881. Species Species and subspecies within the genus ''Graneledone'' include:Norman M.D., Finn J.K. & Hochberg F.G. (2014). Family Octopodidae. pp. 36-215, in P. Jereb, C.F.E. Roper, M.D. Norman & J.K. Finn eds. Cephalopods of the worldAn annotated and illustrated catalogue of cephalopod species known to date. Volume 3. Octopods and Vampire Squids.FAO Species Catalogue for Fishery Purposes ome, FAO 4(3): 353 pp. 11 pls. * '' Graneledone antarctica'' Voss, 1976 * '' Graneledone boreopacifica'' Nesis, 1982 * '' Graneledone challengeri'' (Berry, 1916) * '' Graneledone gonzalezi'' Guerra, González & Cherel, 2000 * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark Norman (marine Biologist)
Mark Douglas Norman is a marine biologist living in southern Australia, where he works through the University of Melbourne and Museum Victoria. For over a decade, Norman has been working exclusively with cephalopods and he is one of the leading scientists in the field, having discovered over 150 new species of octopuses. The best known of these is probably the mimic octopus The mimic octopus (''Thaumoctopus mimicus'') is a species of octopus from the Indo-Pacific region. Like other octopuses, it uses its chromatophores to disguise itself with its background. However, it is noteworthy for being able to impersonate a .... Mark Norman is the author of ''Cephalopods: A World Guide'', a book published in 2000 containing over 800 colour photographs of cephalopods in their natural habitat. References Australian marine biologists Teuthologists Living people Year of birth missing (living people) {{Biologist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic
In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, protein amino acid sequences, or morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An unrooted tree diagram (a network) makes no assumption about the ancestral line, and does ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
