Description of Xiphinema mounporti sp. n., with new data on two other species from Senegal (Nematoda: Longidoridae)

M. Faye, L. Barsi, W. Decraemer

Abstract


Soil samples collected from Dakar and Ziguinchor in Senegal revealed the presence of three species of nematodes belonging to the genus Xiphinema Cobb, 1913, which are herein described and illustrated. These include Xiphinema mounporti sp. n., X. luci Lamberti et Bleve-Zacheo, 1979 and X. opisthohysterum Siddiqi, 1961; the two last species belong to the “Xiphinema americanum group”. The new species is characterized by its body 2.4-2.7 mm long; lip region 5 μm high and 10 μm wide, set off by a depression; funnel-shaped fovea with aperture slit-like, 50-64% of corresponding body diameter long; odontostyle and total stylet 85-100 μm and 140-161 μm long, respectively; pharynx distinctly narrowed at basal bulb; reproductive system with anterior branch complete but reduced, and tripartite uteri; tail elongate bludgeon-like (76-105 μm, c = 23-34, c’ = 3.8-5.2) with six pores on both sides; three juvenile stages. Xiphinema mounporti sp. n. very closely resembles X. bergeri Luc, 1973 but can be clearly differentiated from the latter by its pharynx distinctly narrowed in front of basal bulb, unequal genital branches, tripartite uteri, six pairs of caudal pores, and three juvenile stages. Male and juvenile stages of X. luci are described for the first time; this species has only three juvenile stages. Our population of X. opisthohysterum presents tail with terminus varying in shape from more or less rounded to mucronate. This species is recorded for the first time in Africa and for the second time outside India.

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