Gracixalus medogensis (Ye and Hu, 1984) (Figures 1–6; Tables 1 –5) Philautus medogensis Ye and Hu, 1984 Aquixalus medogensis Fei, Hu, Ye, and Huang, 2009 Gracixalus medogensis Li, Che, Murphy, Zhao, Zhao, Rao, and Zhang, 2009 Remark. The original description and comparison of Gracixalus medogensis (Ye and Hu, 1984) was brief and based on a single specimen, with no comprehensive comparison conducted with all species known to date. Therefore, below we present a detailed morphological description and comparison for the species. Specimens examined. SDBDU 2024.6748, SDBDU 2024.6586, SDBDU 2024.6579, and SDBDU 2022.6244, four adult males, and SDBDU 2024.6580, an adult female, from Pange in Tale Valley Wildlife Sanctuary, Lower Subansiri district, Arunachal Pradesh state, India; SDBDU 2023.6393, SDBDU 2023.6539, and SDBDU 2023.6568, three subadults, from Tasi Biidang in Tale Valley Wildlife Sanctuary, Lower Subansiri district, Arunachal Pradesh state, India; and SDBDU 2025.6779, an adult male, from Tiwarigaon, Lower Dibang Valley district, Arunachal Pradesh state, India (see Distribution and Natural History for more details). Diagnosis. Distinguishable from its congeners by a combination of the following morphological characters: (1) relatively small adult size, SVL 24.1–29.7 mm (N = 5) in males, SVL 31.0 mm in female (N = 1); (2) snout rounded to truncate in dorsal view; (3) head longer than wide (HL/HW ratio 1.08–1.10 in males); (4) internarial distance almost equal to diameter of eye (IN/EL ratio 0.94–1.03 in males); (5) vomerine teeth absent; (6) weakly developed spines on upper eyelid (in life); (7) supratympanic fold distinct; (8) tympanum rather distinct; (9) dorsal skin shagreened to granular; (10) ventral skin granular, not semi-transparent; (11) webbing absent on fingers; (12) moderately developed webbing on foot: fourth toe webbing just below the third subarticular tubercle on either side; (13) dorsum green, brownish-green, or brown, with prominent and contrasting markings that extend from interorbital region to posterior region of dorsum, and light brown-yellow colourations along the body side; (14) males with a smooth nuptial pad on finger I. Adult morphology. Morphological description, based on five adult males. Small adult size (SVL 24.1 – 29.7) with a slender body; head longer than wide (HL/ HW 1.08 – 1.10); outline of the snout rounded to truncate in dorsal view, rounded in ventral view, and rounded to vertical in lateral view; canthus rostralis distinct and sharp; loreal region obtuse and concave; interorbital region flat; snout longer than horizontal diameter of eye (SL/ EL 1.15 – 1.36); nostril nearer to the tip of snout than eye (NS / EN 0.68–0.74); internarial distance almost equal to the diameter of eye (IN / EL 0.94–1.03); interorbital width greater than upper eyelid width (IUE / UEW 1.35 – 1.50); tympanum rather distinct, diameter shorter than eye diameter (TYD / EL 0.41–0.42); supratympanic fold distinct and extends up to the axilla; vomerine teeth absent; tongue attached anteriorly, deeply notched posteriorly. Forelimbs relatively slender; relative length of fingers FLI

Published as part of Tajo, Tage, Upadhyaya K., Radhakrishna, Dikshit Akalabya Sarmah, A. N., Garg, Sonali & Biju, S. D., 2025, Whistles in the reeds: a new country record of the deeply divergent Gracixalus medogensis, with additional insights on Gracixalus frogs (Rhacophoridae) in India, pp. 511-535 in Zootaxa 5659 (4) on pages 520-527, DOI: 10.11646/zootaxa.5659.4.3, http://zenodo.org/record/16601684