Natural history of Ansonia karen sp. nov. A. Breeding habitat of the new species Ansonia karen sp. nov. in Suan Phueng District, Ratchaburi Province, western Thailand. B. Female of the new species in situ (not collected). C. Male of the new species in situ (not collected). D. Tadpole at Gosner (1960) stage 38 (AUP-02091, left), and a metamorph at Gosner (1960) stage 44 (AUP-02092, right) in situ. Photos by M. Naiduangchan.

  Part of: Suwannapoom C, Grismer LL, Pawangkhanant P, Naiduangchan M, Yushchenko PV, Arkhipov DV, Wilkinson JA, Poyarkov NA (2021) Hidden tribe: A new species of Stream Toad of the genus Ansonia Stoliczka, 1870 (Anura: Bufonidae) from the poorly explored mountainous borderlands of western Thailand. Vertebrate Zoology 71: 763-779.