Description of Tylenchorhynchus zambiensis N. Sp. (Nemata: Tylenchidae) from Zambia


  • Maria Eugenia Venditti
  • Gregory R. Noel


Maize, Morphology, Nematode, New Species, Taxonomy, Tylenchorhynchus zambiensis, Zea mays


Tylenchorhynchus zambiensis n. sp., associated with roots of maize (Zea mays L.) in Zambia, is described and illustrated. Females of this bisexual species are characterized by having a body length of 512-648 m; a low, rounded, offset head region bearing 4 to 5 annuli; stylet 13.3-15.0 m long; tail with 21-32 ventral annuli, smooth tail tip; and presence of a post-anal intestinal sac. Tylenchorhynchus zambiensis n. sp. is most similar to T. brassicae Siddiqi, 1961; T. goffarti Sturhan, 1966; T. ventrosignatus Tobar-Jimenez, 1969; T. quaidi Golden, Maqbool & Handoo, 1987; and T namibiensis Rashid & Heyns, 1990. It differs from T. brassicae by the presence of a post-anal extension of the intestine, a shorter stylet, absence of areolation in the lateral field, and the shape of the female tail. Tylenchorhynchus zambiensis n. sp. differs from T. goffarti by having fewer head annuli (4-5 vs. 6-7), a post-anal intestinal sac, and ratio a (26.7 vs. 33.0). Tylenchorhynchus zambiensis n. sp. ca