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chordeumatida
Chordeumatida (from the Greek word for "sausage") is a large order of millipedes containing some 1200 species with a nearly worldwide distribution. They possess around 30 body segments and reach about 25 mm (1 in) in length.
==Description==
Chordeumatidans are relatively short-bodied, with only 26-32 body segments behind the head. They range in length from 4–25 mm (0.16–1 in). A key feature is the presence of 6 large bristles (setae) on the dorsal surface each body segment. The first segment (collum) is relatively narrow, giving the appearance of a distinct "neck" in many species. The body tapers towards the rear, and the rearmost tip (telson) contains silk-producing organs (spinnerets). A dorsal groove runs down the length of the body, and some species possess paranota, lateral extensions of the exoskeleton. Paranota are also found in some other millipedes, notably Polydesmida, from which Chordeumatidans can be distinguished by having more than 20 body segments and a dorsal groove. Unlike most other helminthomorph (worm-like) millipedes, Chordeumatidans lack ozopores.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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