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Systematic Notes On Longidorus and Paralongidorus 1)

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A study has been made to put the differentiation between Longidorus and Paralongidorus on a more sound basis. The 47 valid species included (till October 1968) in these two genera are reviewed for the shape of their amphids. Several groups resulted, each group has specific characters for the amphidial apertures and basal boundaries shape. This analysis shows that the variation occurring in the shape of the basal boundaries is greater than that of the amphidial aperture, thus, supporting the views of Siddiqi (1965) for separating these two genera. The species afzali, lutosus, remyi, strelitziae, utriculoides and georgiensis are included in Paralongidorus. Of these, P. lutosus and P. strelitziae are new combinations. An amended diagnosis for Paralongidorus and a list of the valid species of each of these two genera are given. L. congoensis n. sp. is described from Congo. Xiphinema brevicaudatum (later on L. brevicaudatus by Thorne, 1961) described by Siddiqi (1959) from India is renamed as L. siddiqii n. sp. Comments are made on L. africanus, L. caespiticola, L. taniwha, L. vineacola and L, meyli. P. georgiensis is described from Egypt.

Affiliations: 1: Instituut voor Dierkunde, Rijksuniversiteit, Gent, Belgium


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