Morphological and Molecular Description of a New Species Haematoloechus dehradunensis sp. nov. (Plagiorchiidae: Haematoloechinae) from the Lungs of Euphlyctis cyanophlyctis (Anura, Dicroglossidae) from Dehradun, along with a Note on H. singaporensis Yuen, 1962, a New Record to India

Purpose Morphological and molecular description of a new species of Haematoloechus dehradunensis sp. nov. collected from the lungs of Euphlyctis cyanophlyctis (Schneider 1799) from Dehradun (Uttarakhand), India and reporting first record of H. singaporensis from India. Methods Digeneans were fixed in AFA (alcohol–formalin–acetic acid), stained with Borax’s carmine, studied and photomicrographed with a BX53 DIC/BF Olympus research microscope. Molecular studies were done by DNA isolation using Qiagen, DNeasy® Blood and Tissue Kit and PCR amplification using r-DNA ITS-1 marker situated between 18S and 1.58S gene. Results and conclusion The new species is differentiated from other known species of Haematoloechus in having larger oral sucker, kidney-shaped ovary and oval-lobed testes. H. singaporensis collected from E. cyanophlyctis represents a first record for India and a new host record. ITS sequences submitted and compared at NCBI GenBank support the uniqueness of the new species.