Ixalus hypomelas Günther, 1876, Ann. Mag. Nat. Hist., Ser. 4, 17: 380. Syntypes: BMNH (many specimens), including BMNH 1947.2.7.47-57 and 1947.2.27.8-10 according to Bossuyt and Dubois, 2001, Zeylanica, 6: 27. BMNH 1947.2.27.8 designated lectotype by Manamendra-Arachchi and Pethiyagoda, 2005, Raffles Bull. Zool., Suppl., 12: 205. Type locality: "Ceylon" = Sri Lanka.
Rhacophorus (Philautus) hypomelas — Ahl, 1931, Das Tierreich, 55: 65.
Philautus hypomelas — Rao, 1937, Proc. Indian Acad. Sci., Ser. B, 6: 422. Dutta and Manamendra-Arachchi, 1996, Amph. Fauna Sri Lanka: 145.
Philautus (Philautus) hypomelas — Bossuyt and Dubois, 2001, Zeylanica, 6: 27.
Pseudophilautus hypomelas — Li, Che, Murphy, Zhao, Zhao, Rao, and Zhang, 2009, Mol. Phylogenet. Evol., 53: 519. Provisional change by implication.
None noted.
Known only from the indefinite type locality "Ceylon".
Removed from the synonymy of Philautus leucorhinus by Dutta and Manamendra-Arachchi, 1996, Amph. Fauna Sri Lanka: 145 (who also provided an account), where it had been placed by Kirtisinghe, 1957, Amph. Ceylon: 69. Manamendra-Arachchi and Pethiyagoda, 2005, Raffles Bull. Zool., Suppl., 12: 205-207, provided an account and noted this extinct species is similar to Philautus oxyrhynchus. Dutta, 1997, Amph. India Sri Lanka: 80-81, provided systematic notes, access to literature, and range. See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 140, who regarded the species as extinct.
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