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Description of Cryphodera brinkmani n. sp. (Nematoda: Heteroderidae), a parasite of Pinus thunbergii Parlatore from Japan, including a key to the species of the genus Cryphodera Colbran, 1966

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A non cyst-forming heteroderid nematode, Cryphodera brinkmani n. sp., is described and illustrated from the roots of Pinus thunbergii Parlatore from Japan; this new species is characterised by globose female with annulated cuticle and curved projecting neck; stylet 41.5 mum long, with rounded knobs, set off from the shaft; excretory pore located 120 to 157 mum from the anterior end, vulva terminal, with a vulva-anus distance of 49 mum and slightly protruding vulval lips, vulva-anus area ranging from flat to concave, subcrystalline layer present, eggs retained in the body; males rare, with head region set off, two lip annules present, stylet 37.5 mum long, rounded knobs set off, anteriorly slightly pointed, lateral field with three incisures, areolated; second-stage juvenile body 493 mum long, head region set off, four cephalic annuli present, stylet 33.5 mum long, with large anteriorly concave knobs, set off from the shaft, tail 70 mum, tapering towards a pointed hyaline tail terminus of 37 mum in length, areolated lateral field with three incisures, phasmids with a lens-like structure located 6 to 10 mum posterior to the anus. A key for the Cryphodera species is proposed.

Description de Cryphodera brinkmani n. sp. (Nematoda: Heteroderidae) parasite de Pinus thunbergii Parlatore au Japon et clef des especes du genre Cryphodera Colbran, 1966 - Un nematode Heteroderide ne formant pas de kyste, Cryphodera brinkmani n. sp., provenant des racines de Pinus thunbergii au Japon, est decrit et illustre; cette nouvelle espece est caracterisee par les femelles globuleuses a cuticule annelee et extremite anterieure courbe, stylet long de 41,5 mum a boutons basaux arrondis bien individualises, pore excreteur situe a 120-157 mum de l'extremite anterieure, vulve terminale (distance vulve-anus 49 mum) et levres vulvaires legerement saillantes, aire perineale plate a concave, presence d'une couche subcristalline, oeufs retenus dans le corps. Les males, rares, ont une region labiale separee du reste du corps, deux anneaux cephaliques, un stylet long de 37,5 mum avec boutons basaux arrondis, bien individualises et legerement pointus anterieurement, des champs lateraux avec trois incisures, areoles. Les juveniles de deuxieme stade, longs de 493 mum, ont une region cephalique separee avec quatre anneaux, un stylet long de 33,5 mum avec des boutons basaux de grande taille, bien individualises et a face anterieure concave, une queue longue de 70 mum, amincie a extremite effilee avec une zone hyaline longue de 37 mum, des champs lateraux marques de trois incisures et areoles, des phasmides a structure lenticulaire situees 6-10 mum posterieurement a l'anus. Une clef pour la determination des especes du genre Cryphodera est proposee.

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/content/journals/10.1163/156854199508081
1999-04-01
2016-12-08

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