Ogma mizoramensis n. sp. (Nematoda: Criconematidae) from Mizoram, India

A survey on plant parasitic nematodes of the order Tylenchida, superfamily Criconematoidea and subfamily Criconematinae revealed the presence of a new species of the genus Ogma Southern 1914 associated with the fibrous roots of Thatch grass from Zemabauk, Aizawl district of Mizoram, India. Ogma mizoramensis n. sp. is reported as a new species. This species is characterized by retrorse body annuli with eight rows of scales arranged longitudinally at the mid-body region with teeth or fringelike structure at the posterior margin. The head consists of two annulus, the first annulus greater than the second annulus in width. True sub-median lobes absent. Stylet long and slender with an anchor-shaped basal knob. Vulva closed type with two conical projections at the anterior vulval lip. Tail short with pointed terminus. Body length = 0.29-0.35 mm, stylet length = 75.7-80.4 μm, R = 79-80, RV = 11-12, RVan = 3-4, Ran = 7-9, Roes = 21-23, V = 86-87% and VL/VB = 1.3-1.5. Detailed morphological characterization, data along with their host, location, SEM images, and illustration are provided.