Morphological and Molecular Characterization of Two New and Two Already Known Species of the Genus Pallisentis (Acanthocephala: Quadrigyridae) from India with an Update in Key to the Species Author Rana, Khushboo 0000-0001-8177-5710 Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, 160014, India. rana. khushboo 961 @ gmail. com; https: // orcid. org / 0000 - 0001 - 8177 - 5710 rana.khushboo961@gmail.com Author Kaur, Harpreet Parasitology Laboratory, Department of Zoology, Panjab University, Chandigarh, 160014, India. text Zootaxa 2023 2023-10-05 5352 4 577 593 http://dx.doi.org/10.11646/zootaxa.5352.4.8 journal article 10.11646/zootaxa.5352.4.8 1175-5326 8426654 E6E8FC63-6356-465F-A878-2EA58C993299 Species: Pallisentis nandai Sarkar, 1953 Host Channa marulius (Hamilton, 1822) Locality: Fish market Sector 21 ( 30.7256°N , 76.7758°E ), Chandigarh , India Site of infection: Small intestine Specimens submitted: Registration number– HARC/ZSI/AC–8 and HARC/ZSI/Ac– 9 in slides P8 and P9 containing voucher specimens male and female, respectively, stained in Gower’s carmine mounted with DPX were submitted to High Altitude Regional Centre– Zoological Survey of India , Solan, India . Sequences generated: The sequences submitted to the NCBI database on the basis of 18S, 28S, and ITS1 – 5.8S – ITS have been allotted accession number OM480741 , OM480743 , and OM501881 , respectively. Specimens examined: 4 males and 5 females Remarks The morphological parameters of the present species are almost similar to the morphology of the already described species P. nandai by Sarkar (1953) , and differ slightly in having longer testes and longer cement reservoir. The average size of anterior testis of male in the present specimens is 1115.3 × 254.0 µm which is different than the original description 505 × 150 µm by Sarkar 1953 and 622 × 188 µm by Amin et al . (2021a) . Similarly, the average size posterior testis in the present specimens is 898.4 × 272.7 µm which is longer than the original description 450 × 150 µm by Sarkar 1953 and 606 × 184 µm by Amin et al . (2021a) . Cement reservoir in present specimens ranged 684.8 × 187.1 µm, whereas it is relatively shorter in the earlier descriptions.