Key to the males of Merogomphus spp. of the Western Ghats 1 Mid-dorsum of abdomen without extensive yellow markings.................................................. 2 Mid-dorsum of abdomen with extensive yellow markings (Fig. 15g –h).............................. M. longistigma 2 Cerci tips approaching each other (Fig. 15f, i, l); genital ligula has short flagella................................... 3 Cerci tips parallel to each other (Fig. 15c), genital ligula has long flagella........................... M. aryanadensis 3 Middle yellow stripe on lateral pterothorax is inconspicuous, yellow mark on mid-dorsum of S3 is absent (Fig.15d–e)............................................................................................ M. flavoreductus Middle yellow stripe on lateral pterothorax is prominent, yellow mark on mid-dorsum of S3 is present (Fig. 15j–k).......................................................................................... M. tamaracherriensis Key to the females of Merogomphus spp. of the Western Ghats 1 Mid-dorsum of abdomen without extensive yellow markings.................................................. 2 Mid-dorsum of abdomen with extensive yellow markings......................................... M. longistigma 2 Yellow mark on mid-dorsum of S3 is absent................................................................ 3 Yellow mark on mid-dorsum of S3 is present.............................................. M. tamaracherriensis 3 Middle yellow stripe on lateral pterothorax is prominent......................................... M. aryanadensis Middle yellow stripe on lateral pterothorax is inconspicuous...................................... M. flavoreductus

Published as part of Chandran, Ayikkara Vivek, Sawant, Dattaprasad, Chandran, Reji, Koparde, Pankaj, Jose, Subin Kaniyamattathil & Kunte, Krushnamegh, 2025, Two new species of Merogomphus Martin, 1904 (Odonata: Anisoptera: Gomphidae) from the Western Ghats, India, pp. 201-226 in Zootaxa 5588 (2) on page 223, DOI: 10.11646/zootaxa.5588.2.1, http://zenodo.org/record/14896301