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Nematological investigation of the order Tylenchida, super-family Criconematoidea and sub-family Macroposthoniinae revealed the presence of two species of the genus Mesocriconema i.e., Mesocriconema mamitensis n. sp. and M. medani, in the rhizospheres of lemongrass and pineapple, respectively, from Mamit district of Mizoram, India. Mesocriconema mamitensis n. sp. is characterized by body length = 0.34-0.45 mm, stylet length = 37.6-49.6 µm, R = 117-120, RV = 7-9, Rvan = 1-2, Ran = 5-7, Roes = 24-32, V = 91.6-93.2 µm, and VL/VB = 0.91-1.27 µm. Mesocriconema medani is characterized by body length = 0.37-0.47 mm, stylet length = 40.6-46.1 µm, R = 117-118, RV = 7-9, Rvan = 1-2, Ran = 5-7, Roes = 26-29, V = 90.4-91.6 µm, and VL/VB = 1.2-1.3 µm. The morphological characterizations of the two species have been done through light and scanning electron microscopy studies. Morphometrics, line illustrations, and information about their hosts and locality are also provided. In addition to the new species description, this study reports M. medani for the first time in Mizoram, India. |
