A new species of cyst nematode, Cactodera torreyanae sp. n., parasitising romerito plants, Suaeda torreyana (Chenopodiaceae), found in highly saline soils in Texcoco, Mexico, is described. The new species is morphologically and molecularly related to C. weissi, from which it differs in smaller fenestral diam., longer body and shorter tail lengths of second-stage juveniles (J2) and to C. rosae, from which it differs in smaller cyst size, longer body length of J2 and the presence of a smooth eggshell surface. Phylogenetic relationships within populations and species of the Punctoderinae and Cactodera are given based on the analysis of the D2-D3 expansion segments of 28S rRNA and the ITS rRNA gene sequences.
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Phylogenetic analysis of Tylenchida Thorne, 1949 as inferred from D2 and D3 expansion fragments of the 28S rRNA gene sequences.
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Identification, phylogeny and phylogeography of circumfenestrate cyst nematodes (Nematoda: Heteroderidae) as inferred from analysis of ITS-rDNA.