Abstract
Mesocriconema abolafiai n. sp. is described by morphological, morphometric, and molecular approaches. The new species is characterized by a body slightly curved with 402 to 612 μm length, 90 to 113 cuticular body annuli with smooth to irregular margins lacking of crenation with not more than one anastomoses, lip region not offset, small flattened submedian lobes, stylet robust (52.8-60.0 μm) with well-developed knobs, open vulva with simple anterior lip, straight vagina, filled spermatheca with globular sperms, presence of males, and conical-acute tail with last annulus bilobed or rounded. Discussions are made on the characterization of M. abolafiai n. sp. from the most closely related species, M. ozarkiense, and several other species having similar tail shape. Furthermore, results of phylogenetic analyses inferred from D2 to D3 expansion fragments of 28S rRNA, 18S rRNA, and ITS rRNA gene sequences revealed the phylogenetic position of the new species within representatives of Criconematidae and supported morphological justifications for considering this population from Iran as a new species in the genus Mesocriconema.
Highlights
Ring nematodes of the genus Mesocriconema (Andrássy, 1965) are damaging root ectoparasites of many economical important crops (Cordero et al, 2012)
We describe the new species M. abolafiai n. sp., based on morphological and molecular characteristics
Mesocriconema abolafiai n. sp. can be distin guished from M. antipolitanum and M. rusticum by differences in the size of submedian lobes, tail shape, spermatheca and occurring of males
Summary
Ring nematodes of the genus Mesocriconema (Andrássy, 1965) are damaging root ectoparasites of many economical important crops (Cordero et al, 2012). Is characterized by 90 to 113 cuticular annuli with smooth to irregular margins lacking crenation, small and flattened submedian lobes, stylet 52.8 to 60.0 μm long, open
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