The Xiphinema americanum-group (Nematoda: Longidoridae). 2. Observations on Xiphinema brevicollum Lordello & da Costa, 1961 and comments on the group.

Summary - This article begins with a critical review of the article of Lamberti et al. (1992) with descriptions of X. brevu:ollum, X. diffusum, and three new species (X. parvum, X. pseudoguirani, X. raylon), ail c10sely related to each other. After studying rype specimens of these five species and pararypes of X. incognirum and X. shen, the present authors propose X. diffusum, X. iruognitum, X. parvum, X. pseudoguirani, X. sheri, and X. taylori as junior synonyms of X. brevicollum. The second part of the article includes a detailed characterization of the Xiphinema americanum-group and a list of its species. X. pachydermum, X. brevisicum, X. longistilum, X. mesostilum, and X. mu:rostilum are excluded from the X. americanum-group. © Orstom/Elsevier, Paris