Additions to the nematode fauna (Plectidae and Cephalobidae) of India

The studies on the soil samples collected from high altitude regions (above 3800 m) of Gangotri valley in Gangotri National Park, Uttarakhand revealed two species of soil nematodes for the first time viz., Plectus parietinus Bastian, 1865 and Stegelletina devimucronata (Sumenkova, 1964) Bostrom and De Ley, 1996. Both these species are additions to the nematode fauna of India. The present population of Plectus and Stegelletina species shows conformity to Plectus parietinus and Stegelletina devimucronata respectively, in most morphometric characteristics except the body length of Plectus parietinus, which is slightly longer than the previously reported studies. Data on their morphometrics and distribution are provided.