A new species of Nigrobaetis Novikova & Kluge, 1987 (Ephemeroptera, Baetidae) from Tamil Nadu, India Author Sivaruban, T. PG & Research department of Zoology, The American College, Madurai- 625002, India. Author Srinivasan, Pandiarajan 0000-0001-8118-3256 PG & Research department of Zoology, The American College, Madurai- 625002, India. & srini 15.05.1996 @ gmail. com; https: // orcid. org / 0000 - 0001 - 8118 - 3256 srini15.05.1996@gmail.com Author Barathy, S. 0000-0002-9464-6464 Department of Zoology, Fatima College, Madurai- 625018, India. & barathyruban @ gmail. com; https: // orcid. org / 0000 - 0002 - 9464 - 6464 barathyruban@gmail.com Author Isack, Rajasekaran 0000-0002-9952-4335 PG & Research department of Zoology, The American College, Madurai- 625002, India. & iceisack 143 @ gmail. com; https: // orcid. org / 0000 - 0002 - 9952 - 4335 iceisack143@gmail.com text Zootaxa 2022 2022-01-12 5091 1 182 190 journal article 2619 10.11646/zootaxa.5091.1.8 c6ced354-271d-45dd-aad8-959fe9d0dd37 1175-5326 5840735 541C3DFD-939F-47B4-8571-97C297227DD5 Nigrobaetis paramakalyani Kubendran & Balasubramanian, 2015 ( Fig. 4 ) Materials Examined. Photos of paratype provided by Zoological Survey of India ( ZSI ) , Southern Regional Centre , Chennai, India . Additions and corrections to the description. Detailed nymphal characters of Nigrobaetis paramakalyani are mentioned in Kubendran et al . (2015) . However, there are several errors in the description made. The addition and corrections to the description are listed as follows: i) posterior margin of tergum with long and apically blunt triangular spines on segments I to X ( Fig. 4C ); ii) gill IV elongated with dark margin, relatively long setae and serrated all along margins, tracheation well visible but poorly divided ( Fig. 4E ); iii) paraproct with 9–10 marginal spines ( Fig. 4D ).