Retrorsia
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Retrorsia
''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae Polydesmidae is a family of millipedes in the order Polydesmida. These millipedes range from 4 mm to 30 mm in length. This family includes species notable for featuring sexual dimorphism in segment number: Adult females in the genus ''Perapolydes .... Species * '' Retrorsia benedictae'' Shelley, 2003 * '' Retrorsia gracilis'' Shear & Marek, 2021 * '' Retrorsia leonardi'' Shelley, 2003 * '' Retrorsia richarti'' Shear & Marek, 2021 * '' Retrorsia simplicissima'' Shear & Marek, 2021 References Polydesmida Millipede genera {{arthropod-stub ...
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Animalia
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinode ...
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Arthropoda
Arthropods (, (gen. ποδός)) are invertebrate animals with an exoskeleton, a Segmentation (biology), segmented body, and paired jointed appendages. Arthropods form the phylum Arthropoda. They are distinguished by their jointed limbs and Arthropod cuticle, cuticle made of chitin, often Mineralization (biology), mineralised with calcium carbonate. The arthropod body plan consists of segments, each with a pair of appendages. Arthropods are bilaterally symmetrical and their body possesses an exoskeleton, external skeleton. In order to keep growing, they must go through stages of moulting, a process by which they shed their exoskeleton to reveal a new one. Some species have wings. They are an extremely diverse group, with up to 10 million species. The haemocoel, an arthropod's internal cavity, through which its haemolymph – analogue of blood – circulates, accommodates its interior Organ (anatomy), organs; it has an open circulatory system. Like their exteriors, the internal or ...
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Diplopoda
Millipedes are a group of arthropods that are characterised by having two pairs of jointed legs on most body segments; they are known scientifically as the class Diplopoda, the name derived from this feature. Each double-legged segment is a result of two single segments fused together. Most millipedes have very elongated cylindrical or flattened bodies with more than 20 segments, while pill millipedes are shorter and can roll into a tight ball. Although the name "millipede" derives from the Latin for "thousand feet", no species was known to have 1,000 or more until the discovery of '' Eumillipes persephone'', which can have over 1,300 legs. There are approximately 12,000 named species classified into 16 orders and around 140 families, making Diplopoda the largest class of myriapods, an arthropod group which also includes centipedes and other multi-legged creatures. Most millipedes are slow-moving detritivores, eating decaying leaves and other dead plant matter. Some eat fungi o ...
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Polydesmida
Polydesmida (from the Greek language, Greek ''poly'' "many" and ''desmos'' "bond") is the largest order (biology), order of millipedes, containing approximately 3,500 species, including all the millipedes reported to produce hydrogen cyanide (HCN). Description Members of the order Polydesmida are also known as "flat-backed millipedes", because on most species, each body segment has wide lateral keels known as paranota. These keels are produced by the posterior half (metazonite) of each body ring behind the collum (millipedes), collum. Polydesmids have no eyes, and vary in length from . Many of the larger species show bright coloration patterns which warn predators of their toxic secretions. Adults usually have 20 segments, counting the collum as the first ring and the telson as the last ring. juvenile (organism), Juveniles have from 7 to 19 rings. In species with the usual 20 segments, adult females have 31 pairs of legs, but in adult males, the eighth leg pair (the first leg pai ...
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Polydesmidae
Polydesmidae is a family of millipedes in the order Polydesmida. These millipedes range from 4 mm to 30 mm in length. This family includes species notable for featuring sexual dimorphism in segment number: Adult females in the genus ''Perapolydesmus'' have the usual 20 segments (counting the collum as the first segment and the telson as the last), but the adult males have only 19. Genera *'' Antrochodus'' *'' Archipolydesmus '' *'' Basicentrus '' *'' Bhutanodesmus '' *'' Bidentogon '' *'' Bosniodesmus '' *'' Bosporodesmus '' *'' Brachydesmus '' *'' Brembosoma '' *'' Calianotus '' *'' Chromobrachydesmus'' *''Cookia'' *'' Cretodesmus'' *'' Dixidesmus '' *'' Epanerchodus '' *'' Eumastigonodesmus'' *'' Goniodesmus '' *'' Haplobrachidesmus'' *'' Haplocookia '' *'' Heterocookia '' *'' Himalodesmus '' *'' Hispaniodesmus '' *'' Huzichodus '' *''Jaxartes The Syr Darya (, ),, , ; rus, Сырдарья́, Syrdarjja, p=sɨrdɐˈrʲja; fa, سيردريا, Sirdaryâ; tg, Сирд ...
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Retrorsia Leonardi
''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae Polydesmidae is a family of millipedes in the order Polydesmida. These millipedes range from 4 mm to 30 mm in length. This family includes species notable for featuring sexual dimorphism in segment number: Adult females in the genus ''Perapolydes .... Species * '' Retrorsia benedictae'' Shelley, 2003 * '' Retrorsia gracilis'' Shear & Marek, 2021 * '' Retrorsia leonardi'' Shelley, 2003 * '' Retrorsia richarti'' Shear & Marek, 2021 * '' Retrorsia simplicissima'' Shear & Marek, 2021 References Polydesmida Millipede genera {{arthropod-stub ...
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Retrorsia Benedictae
''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae. Species * '' Retrorsia benedictae'' Shelley, 2003 * '' Retrorsia gracilis'' Shear & Marek, 2021 * ''Retrorsia leonardi ''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae Polydesmidae is a family of millipedes in the order Polydesmida. These millipedes range from 4 mm to 30 mm in length. This family includes species notable for featuring sexual ...'' Shelley, 2003 * '' Retrorsia richarti'' Shear & Marek, 2021 * '' Retrorsia simplicissima'' Shear & Marek, 2021 References Polydesmida Millipede genera {{arthropod-stub ...
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Retrorsia Gracilis
''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae. Species * ''Retrorsia benedictae'' Shelley, 2003 * '' Retrorsia gracilis'' Shear & Marek, 2021 * ''Retrorsia leonardi ''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae Polydesmidae is a family of millipedes in the order Polydesmida. These millipedes range from 4 mm to 30 mm in length. This family includes species notable for featuring sexual ...'' Shelley, 2003 * '' Retrorsia richarti'' Shear & Marek, 2021 * '' Retrorsia simplicissima'' Shear & Marek, 2021 References Polydesmida Millipede genera {{arthropod-stub ...
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Retrorsia Richarti
''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae. Species * ''Retrorsia benedictae'' Shelley, 2003 * ''Retrorsia gracilis'' Shear & Marek, 2021 * ''Retrorsia leonardi ''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae Polydesmidae is a family of millipedes in the order Polydesmida. These millipedes range from 4 mm to 30 mm in length. This family includes species notable for featuring sexual ...'' Shelley, 2003 * '' Retrorsia richarti'' Shear & Marek, 2021 * '' Retrorsia simplicissima'' Shear & Marek, 2021 References Polydesmida Millipede genera {{arthropod-stub ...
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Retrorsia Simplicissima
''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae. Species * ''Retrorsia benedictae'' Shelley, 2003 * ''Retrorsia gracilis'' Shear & Marek, 2021 * ''Retrorsia leonardi'' Shelley, 2003 * ''Retrorsia richarti ''Retrorsia'' is a genus of mini-millipedes in the family Polydesmidae. Species * ''Retrorsia benedictae'' Shelley, 2003 * ''Retrorsia gracilis'' Shear & Marek, 2021 * ''Retrorsia leonardi ''Retrorsia'' is a genus of mini-millipedes in the famil ...'' Shear & Marek, 2021 * '' Retrorsia simplicissima'' Shear & Marek, 2021 References Polydesmida Millipede genera {{arthropod-stub ...
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