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Title: DESCRIPTION OF TYLENCHORHYNCHUS ZAMBIENSIS N. SP. (NEMATA: TYLENCHIDAE) FROM ZAMBIA

Author
item VENDITTI, MARIA - UNIV OF ILLINOIS
item Noel, Gregory

Submitted to: Nematropica
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/22/1994
Publication Date: N/A
Citation: N/A

Interpretive Summary: While conducting research for an AID project in Zambia, an unidentified nematode was found in the fields used to evaluate the effects of plant-parasitic nematodes on yield of corn, soybean, and sunflower. In this paper the nematode is described as a new species. On a world-wide basis there are approximately 2,500 species of nematodes capable of feeding gon plants. Research to determine the ability of this new species to damag crops is the subject of other reports. Report of the nematode will add to scientists knowledge of biodiversity.

Technical Abstract: 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 um; a low, rounded, offset head region, bearing 4 to 5 annuli; stylet 13.3-15.0 um 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 intestine sac, and ratio a (26.7 vs. 33.0). Tylenchorhynchus zambiensis n. sp. can be distinguished from T. ventrosignatus by ratio a (26.7 vs. 31.5) and the absence of a wave-like structure near the vulva. It differs from T. quaidi by having a rounded head region, presence of a post-anal intestinal sac, and lack of areolation in the lateral field. Tylenchorhynchus zambiensis n. sp. differs from T. namibiensis by a smaller body size, ratio a (26.7 vs. 43.3), ratio c (13.6 vs. 19.6), stylet length (14.0 vs. 17.0), number of annuli in the head region (4-5 vs. 6-9) and absence of areolation in the lateral field.