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Morphological and molecular characterisation of Criconemoides brevistylus Singh & Khera, 1976 and C. obtusicaudatus Heyns, 1962 from South Africa (Nematoda: Criconematidae) with first description of a male C. obtusicaudatus and proposal of new synonyms

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During recent collections in South Africa, two species of Criconemoides were found. Criconemoides brevistylus is described and illustrated from a golf course in KwaZulu-Natal Province. It is compared with several closely related species, and three previously described species (C. helicus, C. onostris and C. paronostris) are regarded as junior synonyms of C. brevistylus. Criconemoides obtusicaudatus is described and illustrated from a maize field in Limpopo Province. The male of the species is described for the first time. Molecular characterisation of C. brevistylus and C. obtusicaudatus using the D2-D3 expansions segments of 28S rRNA and ITS rRNA gene sequences are provided. Phylogenetic relationships of these species with other Criconemoides are discussed.

Affiliations: 1: 1National Collection of Nematodes, Biosystematics Programme, ARC-Plant Protection Research Institute, Private Bag X 134, Queenswood 0121, South Africa; 2: 2Laboratory for Electron Microscopy, North West University, Potchefstroom Campus, Potchefstroom 2520, South Africa


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