Meloidogyne microcephala n. sp. (Meloidogynidae), a Root-knot Nematode from Thailand


  • Gean M. Cliff
  • Hedwig Hirschmann


Meloidogyne microcephala n. sp. is described and illustrated from specimens obtained from tobacco (Nicotiana tabacum L.) in Thailand. The female perineal pattern usually has a low dorsal arch, coarse striae, and a series of small cuticular flaps around the tail terminus. The stylet of the female is 14.4 [mu]m long, with large, square to rectangular stylet knobs, The distinctive male head region is narrow, small, and truncate with a low, flattened head cap. The stylet length is 20.6 [mu]m, and the knobs are small, angular, and set off from the shaft. Mean length of second-stage juveniles is 457.5 [mu]m, and stylet length is 9.3 [mu]m. The tail tip in the juveniles is set off from the rest of the tail as a small finger-like projection. M. microcephala reproduces by mitotic parthenogenesis, and has a chromosome number of 2n = 36. Key words: taxonomy, morphology, new Meloidogyne species, host range, scanning electron microscopy.