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Ovalipes Catharus
''Ovalipes catharus'', commonly known as paddle crab and mi, pāpaka, is a species of crab of the family Portunidae. It is found around the coasts of New Zealand, the Chatham Islands, and in south-eastern parts of Australia. Individuals from shallow waters, deep, have a carapace width of only , while those from are wide. Identification At first glance, ''Ovalipes catharus'' appear to be fairly similar to many other crabs. Paddle crabs have a hard shell, or carapace and ten legs, five to each side. The first set of legs of the crab is tipped with large claws. The claws of the paddle crab are fairly long and narrow and are curled in a sickle shape.McLaughlin, P. (1980). Comparative morphology of recent crustace. W.H. Freeman and Company. First Edition. pp. 126–128 They are decapods which means they have 10 legs and are situated symmetrically with five legs on each side. The claws are also serrated with large points on the insides.Wilkens S., S. Ahyong. (2015). Coastal crabs: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adam White (zoologist)
Adam White (29 April 1817 – 30 December 1878) was a Scottish zoologist. Biography White was born in Edinburgh on 29 April 1817.White, Adam (1817-1878), naturalist by Ann Datta in the ''''. He became acquainted with , at the |
Fecundity
Fecundity is defined in two ways; in human demography, it is the potential for reproduction of a recorded population as opposed to a sole organism, while in population biology, it is considered similar to fertility, the natural capability to produce offspring, measured by the number of gametes (eggs), seed set, or asexual propagules. Superfecundity refers to an organism's ability to store another organism's sperm (after copulation) and fertilize its own eggs from that store after a period of time, essentially making it appear as though fertilization occurred without sperm (i.e. parthenogenesis). Human demography Human demography considers only human fecundity, at its culturally differing rates, while population biology studies all organisms. The term ''fecundity'' in population biology is often used to describe the rate of offspring production after one time step (often annual). In this sense, fecundity may include both birth rates and survival of young to that time step. Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Adam White (zoologist)
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the intr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustaceans Described In 1843
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustaceans Of The Pacific Ocean
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portunoidea
__NOTOC__ Portunoidea is a superfamily of crabs that includes the family Portunidae, the swimming crabs. Which other crab families are also placed here is a matter of some contention, and may be revised following molecular phylogenetic analyses. Description Their rather flat and smooth carapace is usually wider than long and of hexagonal, subhexagonal, rectangular, or transversely ovate shape. It is usually widest between the hindmost spines of the forward rim; there may be up to 9 pairs of these spines, with a few smaller ones right above the head, but they are missing altogether in some species. In some, the first maxilliped's endopod is lobed, forming the characteristic portunid lobe. The chelipeds are usually robust, and in some the last pereiopod pair has ovate dactyls. The sutures of the sternum between segments 4 to 8 are usually incomplete, and in the Portunidae, the eighth sternite is usually visible if seen from below and has a penial groove. In males, the abdomi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wharenui
A wharenui (; literally "large house") is a communal house of the Māori people of New Zealand, generally situated as the focal point of a ''marae''. Wharenui are usually called meeting houses in New Zealand English, or simply called ''whare'' (a more generic term simply referring to a house or building). Also called a ''whare rūnanga'' ("meeting house") or ''whare whakairo'' (literally "carved house"), the present style of wharenui originated in the early to middle nineteenth century. The houses are often carved inside and out with stylized images of the iwi's (or tribe's) ancestors, with the style used for the carvings varying from tribe to tribe. Modern meeting houses are built to regular building standards. Photographs of recent ancestors may be used as well as carvings. The houses always have names, sometimes the name of a famous ancestor or sometimes a figure from Māori mythology. Some meeting houses are built at places that are not the location of a tribe, but where many ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tā Moko
' is the permanent marking or "tattoo" as traditionally practised by Māori, the indigenous people of New Zealand. It is one of the five main Polynesian tattoo styles (the other four are Marquesan, Samoan, Tahitian and Hawaiian). (tattooists) were considered ', or inviolable and sacred. Background Tattoo arts are common in the Eastern Polynesian homeland of the Māori people, and the traditional implements and methods employed were similar to those used in other parts of Polynesia. In pre-European Māori culture, many if not most high-ranking persons received . ''Moko'' were associated with ''mana'' and high social status; however, some very high-status individuals were considered too ''tapu'' to acquire ''moko'', and it was also not considered suitable for some ''tohunga'' to do so. Receiving constituted an important milestone between childhood and adulthood, and was accompanied by many rites and rituals. Apart from signalling status and rank, another reason for the pract ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Māori Art
Māori or Maori can refer to: Relating to the Māori people * Māori people of New Zealand, or members of that group * Māori language, the language of the Māori people of New Zealand * Māori culture * Cook Islanders, the Māori people of the Cook Islands * Cook Islands Māori, the language of the Cook Islanders Ships * SS ''Maori'', a steamship of the Shaw Savill Line, shipwrecked 1909 * , a Royal Navy Tribal-class destroyer, sunk in 1915 * , a Royal Navy Tribal-class destroyer, launched 1936 and sunk 1942 * TEV ''Maori III'', a Union Steam Ship Company inter-island ferry, 1952–74 Sports teams * New Zealand Māori cricket team * New Zealand Māori rugby league team * New Zealand Māori rugby union team Other * ''Maori'', a novel by Alan Dean Foster *Mayotte, in the Bushi language Bushi or Kibosy (''Shibushi'' or ''Kibushi'') is a dialect of Malagasy spoken in the Indian Ocean island of Mayotte. Malagasy dialects most closely related to Bushi are spoken in northw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Cannibalism
Sexual cannibalism is when an animal, usually the female, cannibalizes its mate prior to, during, or after copulation.Polis, G.A. & Farley, R.D. Behavior and Ecology of Mating in the journal of Arachnology 33-46 (1979). It is a trait observed in many arachnid orders and several insect orders. Several hypotheses to explain this seemingly paradoxical behavior have been proposed. The adaptive foraging hypothesis,Blamires, S.J. Nutritional implications for sexual cannibalism in a sexually dimorphic orb web spider. Austral Ecology 36, 389-394 (2011). aggressive spillover hypothesisArnqvist, G. Courtship behaviour and sexual cannibalism in the semi-aquatic fishing spider, DOLOMEDES FIMBRIATUS (CLERCK) (ARANEAE: PISAURIDAE).pdf. The journal of Arachnology 20, 222-226 (1992). and mistaken identity hypothesisGould, S. Only his wings remained. Natural History 93, 10-18 (1984). are among the proposed hypotheses to explain how sexual cannibalism evolved. This behavior is believed to have evolve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molt
In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is the manner in which an animal routinely casts off a part of its body (often, but not always, an outer layer or covering), either at specific times of the year, or at specific points in its life cycle. In medieval times it was also known as "mewing" (from the French verb "muer", to moult), a term that lives on in the name of Britain's Royal Mews where the King's hawks used to be kept during moulting time before becoming horse stables after Tudor times. Moulting can involve shedding the epidermis (skin), pelage (hair, feathers, fur, wool), or other external layer. In some groups, other body parts may be shed, for example, the entire exoskeleton in arthropods, including the wings in some insects. Examples In birds In birds, moulting is the periodic replacement of feathers by shedding old feathers while producing new ones. Feathers are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dactylus
The dactylus is the tip region of the tentacular club of cephalopods and of the leg of some crustaceans (see arthropod leg). In cephalopods, the dactylus is narrow and often characterized by the asymmetrical placement of suckers (i.e., the ventral expansion of the club) and the absence of a dorsal protective membrane. In crustaceans, the dactylus is the seventh and terminal segment of their thoracic appendages. In certain instances the dactylus, together with the propodus, form the claw. The term ''dactylus'' means "finger" in Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor .... References Cephalopod zootomy Crustacean anatomy {{Animal anatomy-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
