Tylenchina Tylenchina Tylenchoidea Tylenchidae Atylenchinae (Skarbilovich, 1959) Synonyms: Antarctenchinae (Spaull, 1972) Pleurotylenchinae (Andrássy, 1976) Aglenchinae (Siddiqui & Khan, 1983)
Undivided laterally elongated front plate of the head with large, roundish amphid openings; stylet with about equal parts, vulva covered by lateral or longitudinal flaps; males often with large hypoptygmata. Males present in all genera, but most Coslenchus species appear to be parthenogenetic. Bursa well developed in Antarctenchus, Aglenchus, and Coslenchus, very poorly developed in Atylenchus and Pleurotylenchus. In Atylenchus, Antarctenchus, and Coslenchus poslonicus the cloacal opening is provided with large hypoptygmata; in Aglenchus and remaining Coslenchus species, a cloacal tube is present. Tail long, attenuated, tail tip setose, acute or finely rounded. Phasmids ad-vulval or post-vulval in Aglenchus and Coslenchus, on the tail in Antarctenchus. [Ref: Geraert & Raski, Rev. Nematol. 10(2):143-161 (1987).]
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