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Plaxiphora Obtecta
''Plaxiphora obtecta'' is a large chiton in the family Mopaliidae, endemic to New Zealand, where it is most often found on the West Coast of the North Island. It is called Haka-hiwihiwi by some Māori and was likely a food source. Description and habitat Up to long and wide, making it one of the largest chitons found in New Zealand. It has a broad dark brown girdle dotted with small short bristles, and reduced dark green valves A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fitting ..., sometimes with a paler stripe down the centre. It is frequent around the holdfasts of algae and in rock crevices around the low intertidal zone, usually on exposed coasts. References {{Taxonbar, from=Q3791927 Mopaliidae Chitons of New Zealand Molluscs described in 1893 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiton
Chitons () are marine molluscs of varying size in the class Polyplacophora (), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized. They are also sometimes known as gumboots or sea cradles or coat-of-mail shells or suck-rocks, or more formally as loricates, polyplacophorans, and occasionally as polyplacophores. Chitons have a shell composed of eight separate shell plates or valves. These plates overlap slightly at the front and back edges, and yet articulate well with one another. Because of this, the shell provides protection at the same time as permitting the chiton to flex upward when needed for locomotion over uneven surfaces, and even allows the animal to curl up into a ball when dislodged from rocks. The shell plates are encircled by a skirt known as a girdle. Habitat Chitons live worldwide, from cold waters through to the tropics. They live on hard surfaces, such as on or under rocks, or in rock crevices. Some species live quite h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mopaliidae
Mopaliidae is a family of marine molluscs in the class Polyplacophora. Genera There are 10 recognized genera: * '' Amicula'' Gray, 1847 * '' Dendrochiton'' Berry, 1911 * '' Gallardochiton'' Sirenko, 2007 * '' Katharina'' Gray, 1847 * '' Mopalia'' Gray, 1847 * '' Mopaliella'' Thiele, 1909 * ''Nuttallochiton'' Plate, 1899 * ''Placiphorella'' Dall, 1879 * '' Placiphorina'' Kaas & Van Belle, 1994 * ''Plaxiphora ''Plaxiphora'' is a genus of chitons in the family Mopaliidae. Species * ''Plaxiphora albida'' ( Blainville, 1825) * '' Plaxiphora atlantica'' * ''Plaxiphora aurata'' (Spalowsky 1795) * '' Plaxiphora aurea'' * ''Plaxiphora australis'' Suter, ...'' Gray, 1847 (synonym '' Maorichiton'' Iredale, 1914) References Mollusc families Chitons Taxa named by William Healey Dall {{chiton-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the List of island countries, sixth-largest island country by area, covering . New Zealand is about east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. New Zealand's Capital of New Zealand, capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and then developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Māori People
The Māori (, ) are the indigenous Polynesian people of mainland New Zealand (). Māori originated with settlers from East Polynesia, who arrived in New Zealand in several waves of canoe voyages between roughly 1320 and 1350. Over several centuries in isolation, these settlers developed their own distinctive culture, whose language, mythology, crafts, and performing arts evolved independently from those of other eastern Polynesian cultures. Some early Māori moved to the Chatham Islands, where their descendants became New Zealand's other indigenous Polynesian ethnic group, the Moriori. Initial contact between Māori and Europeans, starting in the 18th century, ranged from beneficial trade to lethal violence; Māori actively adopted many technologies from the newcomers. With the signing of the Treaty of Waitangi in 1840, the two cultures coexisted for a generation. Rising tensions over disputed land sales led to conflict in the 1860s, and massive land confiscations, to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valve (mollusc)
A valve is each articulating part of the shell of a mollusc or another multi-shelled animal such as brachiopods and some crustaceans. Each part is known as a valve or in the case of chitons, a "plate". Members of two classes of molluscs, the Bivalvia (clams) and the Polyplacophora (chitons), have valves. Species within one family of very unusual small sea snails, marine opisthobranch gastropods in the family Juliidae, also have two articulating shells or valves, which resemble those of a bivalve. This exceptional family is commonly known as the bivalved gastropods. Gastropods in general are sometimes called "univalves", because in those that have a shell, the shell is usually in one part. Chitons The valves of chitons are eight dorsal, articulated shell plates, which are frequently coloured and sculpted. After death the girdle that holds the plates together disintegrates and the plates separate. Thus individual plates can be found washed up in beach drift, as shown i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chitons Of New Zealand
Chitons () are marine molluscs of varying size in the class Polyplacophora (), formerly known as Amphineura. About 940 extant and 430 fossil species are recognized. They are also sometimes known as gumboots or sea cradles or coat-of-mail shells or suck-rocks, or more formally as loricates, polyplacophorans, and occasionally as polyplacophores. Chitons have a shell composed of eight separate shell plates or valves. These plates overlap slightly at the front and back edges, and yet articulate well with one another. Because of this, the shell provides protection at the same time as permitting the chiton to flex upward when needed for locomotion over uneven surfaces, and even allows the animal to curl up into a ball when dislodged from rocks. The shell plates are encircled by a skirt known as a girdle. Habitat Chitons live worldwide, from cold waters through to the tropics. They live on hard surfaces, such as on or under rocks, or in rock crevices. Some species live quite high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
