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Thaumeledone Marshalli
''Thaumeledone'' is a genus of octopuses in the family Octopodidae found in deep waters in the Southern Hemisphere. Characteristics Members of this genus are found in deep waters in the Southern Hemisphere. They are small, squat-bodied, benthic octopuses with arms united by a web. A single row of suckers occurs on the arms. Most species have a deep purple pigmentation on the oral surface of the web. One arm in the male is modified into a hectocotylus. This has a large calamus at the end, giving it a club-like appearance. Species These species are accepted by the World Register of Marine Species:''Thaumeledone'' Robson, 1930 World Register of Marine Species. Retrieved 2011-10-07. * '' |
Guy Coburn Robson
Guy Coburn Robson (1888–1945) was a British zoologist, specializing in Mollusca, who first named and described ''Mesonychoteuthis hamiltoni'', the colossal squid. Robson studied at the marine biological station in Naples, and joined the staff of the Natural History Museum in 1911, becoming Deputy Keeper of the Zoology Department from 1931 to 1936. Evolution Robson is best known for his major book ''The Variations of Animals in Nature'' (co-authored with O. W. Richards, 1936) which argued that although the fact of evolution is well established, the mechanisms are largely hypothetical and undemonstrated.Allee, W. C. (1937)''The Variation of Animals in Nature: A Critical Summary and Judgment of Evolutionary Theories by G. C. Robson, O. W. Richards'' ''American Journal of Sociology'' 42 (4): 596–597. The book claims that most differences among animal populations and related species are non-adaptive. It was published before major developments in the modern synthesis and contains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Evans Hoyle
Dr William Evans Hoyle FRSE (28 January 1855 – 7 February 1926) was a noted British zoologist. A specialist in deep sea creatures he worked on classification and illustrations from the Challenger Expedition from 1882 to 1888. Life Hoyle was born in Manchester the son of William Jennings Hoyle, an engraver. He was educated at Owens College and at Exeter College and Christ Church, Oxford where he obtained a Bachelor of Arts in 1877, Master of Arts in 1882 and a Doctor of Science, he was also Member of the Royal College of Surgeons. He was the Director of the Manchester Museum from 1889 to 1909 and then was the first director of the National Museum of Wales from 1909 up to his retirement in 1926. Trained as a medical anatomist, Hoyle is most famous for his monographic studies on cephalopods from major exploring expeditions of his era including the Challenger, the Albatross, the British National Antarctic Expedition and the Scottish National Antarctic Expedition. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octopus
An octopus ( : octopuses or octopodes, see below for variants) is a soft-bodied, eight- limbed mollusc of the order Octopoda (, ). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids. Like other cephalopods, an octopus is bilaterally symmetric with two eyes and a beaked mouth at the center point of the eight limbs. The soft body can radically alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight appendages behind them as they swim. The siphon is used both for respiration and for locomotion, by expelling a jet of water. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse of all invertebrates. Octopuses inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow quickly, mature earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Family (biology)
Family ( la, familia, plural ') 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". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opi ... [...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'' d'Orbigny, 1845 *''Pteroctopus'' P. Fischer, 1882 *'' Robsonella'' Adam, 1938 *'' Scaeurgus'' Troschel, 1857 *''Teretoctopus ''Teretoctopus'' is a genus of octopus An octopus ( : octopuses or octopodes, see below for variants) is a soft-bodied, eight- limbed mollusc o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalopod Limb
All cephalopods possess flexible limbs extending from their heads and surrounding their cephalopod beak, beaks. These appendages, which function as muscular hydrostats, have been variously termed arms, legs or tentacles. Description In the scientific literature, a cephalopod ''arm'' is often treated as distinct from a ''Tentacle#Tentacles in invertebrates, tentacle'', though the terms are sometimes used interchangeably, often with the latter acting as an umbrella term for cephalopod limbs. Generally, arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends.Young, R.E., M. Vecchione & K.M. Mangold 1999Cephalopoda Glossary Tree of Life web project. Barring a few exceptions, octopuses have eight arms and no tentacles, while squid and cuttlefish have eight arms (or two "legs" and six "arms") and two tentacles.Norman, M. 2000. ''Cephalopods: A World Guide''. ConchBooks, Hackenheim. p. 15. "There is some confusion around the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hectocotylus
A hectocotylus (plural: ''hectocotyli'') is one of the arms of male cephalopod A cephalopod is any member of the molluscan class Cephalopoda ( Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, ...s that is specialized to store and transfer spermatophores to the female. Structurally, hectocotyli are muscular hydrostats. Depending on the species, the male may use it merely as a conduit to the female, analogously to a penis in other animals, or he may Autotomy, wrench it off and present it to the female. The hectocotyl arm was first described in Aristotle's biology, Aristotle's biological works. Although Aristotle knew of its use in mating, he was doubtful that a tentacle could deliver sperm. The name ''hectocotylus'' was devised by Georges Cuvier, who first found one embedded in the mantle of a female Argonaut (animal), argonaut. Supposing it to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaumeledone Brevis
''Thaumeledone'' is a genus of octopuses in the family Octopodidae found in deep waters in the Southern Hemisphere. Characteristics Members of this genus are found in deep waters in the Southern Hemisphere. They are small, squat-bodied, benthic octopuses with arms united by a web. A single row of suckers occurs on the arms. Most species have a deep purple pigmentation on the oral surface of the web. One arm in the male is modified into a hectocotylus A hectocotylus (plural: ''hectocotyli'') is one of the arms of male cephalopod A cephalopod is any member of the molluscan class Cephalopoda ( Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusive .... This has a large calamus at the end, giving it a club-like appearance. Species These species are accepted by the World Register of Marine Species: [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaumeledone Gunteri
''Thaumeledone gunteri'' is a species of small, benthic, deep-sea octopus found in the bathyal zone in the Southern Ocean near South Georgia. Description The mantle length of ''Thaumeledone gunteri'' is typically about and the total length is , the arms being relatively short at 5 cm. The background colour is whitish, but the dorsal and ventral surfaces are covered by large, irregular, deep purple tubercles. The web linking the arms is uniformly pale. The head is narrower than the mantle, with several large tubercles above the eye. The eight arms are joined by a deep web, with about 35 small suckers on each arm. The funnel organ is "VV"-shaped and there are five elements in the radula. The posterior salivary gland, a diagnostic feature in this genus, has a diameter of 11 mm. Phylogenetic relationships The funnel organ in ''T. gunteri'' is similar to that in ''Thaumeledone peninsulae'' and they both share a characteristic loop in the rectum. ''Thaumeledone rotunda'' is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thaumeledone Marshalli
''Thaumeledone'' is a genus of octopuses in the family Octopodidae found in deep waters in the Southern Hemisphere. Characteristics Members of this genus are found in deep waters in the Southern Hemisphere. They are small, squat-bodied, benthic octopuses with arms united by a web. A single row of suckers occurs on the arms. Most species have a deep purple pigmentation on the oral surface of the web. One arm in the male is modified into a hectocotylus. This has a large calamus at the end, giving it a club-like appearance. Species These species are accepted by the World Register of Marine Species:''Thaumeledone'' Robson, 1930 World Register of Marine Species. Retrieved 2011-10-07. * '' |
