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Desmoscolecida is an order of marine nematodes.[2] In a worm of this order, the body tapers towards each end and is marked by a number of well-defined ridges. Their number varies in the different species. The head bears four movable setae, and some of the ridges bear a pair either dorsally or ventrally. Two pigment spots between the fourth and fifth ridges are regarded as eyes. The Desmoscolecida move by looping their bodies like geometrid caterpillars or leeches, as well as by creeping on their setae. The mouth is terminal, and leads into a muscular oesophagus which opens into a straight intestine terminating in an anus, which is said to be dorsal in position. The sexes are distinct. The testis is single, and its duct opens into the intestine and is provided with two chitinous spicules. The ovary is also single, opening independently and anterior to the anus. The nervous system is as yet unknown.
Genera include Desmoscolex, Greeffiella, and Tricoma.
This article incorporates text from a publication now in the public domain: Shipley, Arthur E. (1911). "Desmoscolecida". In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 8 (11th ed.). Cambridge University Press. p. 99.
Desmoscolecida is an order of marine nematodes. In a worm of this order, the body tapers towards each end and is marked by a number of well-defined ridges. Their number varies in the different species. The head bears four movable setae, and some of the ridges bear a pair either dorsally or ventrally. Two pigment spots between the fourth and fifth ridges are regarded as eyes. The Desmoscolecida move by looping their bodies like geometrid caterpillars or leeches, as well as by creeping on their setae. The mouth is terminal, and leads into a muscular oesophagus which opens into a straight intestine terminating in an anus, which is said to be dorsal in position. The sexes are distinct. The testis is single, and its duct opens into the intestine and is provided with two chitinous spicules. The ovary is also single, opening independently and anterior to the anus. The nervous system is as yet unknown.
Genera include Desmoscolex, Greeffiella, and Tricoma.
Les Desmoscolecida sont un ordre de nématodes chromadorés.
Les Desmoscolecida sont un ordre de nématodes chromadorés.
Desmoscolecida zijn een orde van rondwormen (Nematoda).
De volgende onderorde wordt bij de orde ingedeeld:
Bronnen, noten en/of referentiesDesmoscolecida zijn een orde van rondwormen (Nematoda).
Desmoscolecida Filipjev, 1929
Desmoscolecida (лат.) — отряд круглых червей из класса Chromadorea[1]. Около 300 видов[1]. Обитатели морских вод, реже в почве или пресноводные. Тело укороченное, вздутое. Тангорецепторы головы расположены в три круга. Фаринкс цилиндрический. Спикулы и половые трубки самок парные. Амфиды круглые[2][3].
26 родов и около 300 видов[4]. Первоначально таксон был назван как Desmoscolecata Filipjev, 1929, а в виде Desmoscolecida используется после унификации имён высших таксонов нематод, начиная с работы Де Конинка (Coninck, 1965)[1].
Desmoscolecida (лат.) — отряд круглых червей из класса Chromadorea. Около 300 видов. Обитатели морских вод, реже в почве или пресноводные. Тело укороченное, вздутое. Тангорецепторы головы расположены в три круга. Фаринкс цилиндрический. Спикулы и половые трубки самок парные. Амфиды круглые.
