Ecological Attributes of a New Species of Nematode Parasite, Oswaldocruzia upica n sp. from the Amphibian Population of Rohilkhand Region, Uttar Pradesh, India

摘要

The present study pertains to the description of new species of trichostrongylid nematode genus Oswaldocruzia recovered from the intestine of amphibian hosts (Bufo melanostictus and Rana tigrina) in Rohilkhand region, Uttar Pradesh, India and its relationship to zoogeographical and climatic factors is discussed. Oswaldocruzia upica n.sp. is characterized by the large size of the male and female worms (male: 7.7-11.2 mm; female: 20.00-25.60 mm), the unique post oesophageal position of the excretory pore (in contrast to its oesophageal position in other species), presence of 2 cephalic papillae, 2 distinct caudal papillae, 2 anterior dierids and trilobed bursa and absense of cervical papillae and lateral alae. Ecological attributes considered in relation to habitat and climatic investigations revealed that the parasite has a higher concentration index at site Al (Company garden, Bareilly) is maximum during rainy season and least during winters.