Ceratophora ukuwelai, Karunarathna & Poyarkov & Amarasinghe & Surasinghe & Bushuev & Madawala & Gorin & Silva, 2020

Karunarathna, Suranjan, Poyarkov, Nikolay A., Amarasinghe, Chamara, Surasinghe, Thilina, Bushuev, Andrey V., Madawala, Majintha, Gorin, Vladislav A. & Silva, Anslem De, 2020, A new species of the genus Ceratophora Gray, 1835 (Reptilia: Agamidae) from a lowland rainforest in Sri Lanka, with insights on rostral appendage evolution in Sri Lankan agamid lizards, Amphibian & Reptile Conservation (e 259) 14 (3), pp. 103-126 : 121

Key to Sri Lankan species of genus Ceratophora

1a. Rostral appendage simple, restricted to rostral scale alone……………….………………………….…..……...2

1b. Rostral appendage complex, comprising more scales than rostral alone………………………….……..………3

2a. Rostral appendage rudimentary in both sexes (appendage is shorter than eye-nostril distance)….…. C. erdeleni

2b. Rostral appendage prominent in males (appendage is longer than eye-nostril distance)………….. C. stoddartii

3a. Rostral appendage laterally compressed…………………..……………………….……..………… C. tennentii

3b. Rostral appendage not laterally compressed………………………………..……..….………………………...4

4a. Squamosal process absent, represented by an enlarged scale.……..………………..……..….......... C. karu

4b. A prominent squamosal process present….............................…………………...............................................5

5a. Trunk length is less than half of SVL and snout to axilla length is longer than trunk length (52–58 paravertebrals and 92–95 ventrals)…………..………………………………………………………………….…………… C. aspera 5b. Trunk length is more than half of SVL and snout to axilla length is shorter than trunk length (40–44 paravertebrals and 72–75 ventrals)………………………………………………..….. Ceratophora ukuwelai sp. nov.

committee, and the field staff of the Department of Wildlife (permits WL/3/2/42/18 a&b), and K.M.A. Bandara (Additional Conservator of Forest Department) and field staff assisting during the field surveys (permits FRC/5, FRC/6 and R&E/RES/NFSRCM/2019-04) and for granting permission. Nanda Wickramasinghe, Sanuja Kasthuriarachchi, Lankani Somaratne, Chandrika Munasinghe, Rasika Dasanayake, Tharushi Gamage, Thushari Dasanayake, Ravindra Wickramanayake, and Pannilage Gunasiri at NMSL assisted while we were examining collections under their care. Various support was provided by Kanishka Ukuwela (for lab work), Colin McCarthy (for photographs of the syntypes), Sanjaya Kanishka and Sanoj Wijayasekara (for various photographs), Thasun Amarasinghe (for technical advice), Hiranya Sudasinghe and Dinesh Gabadage (for reference materials), Madhava Botejue, Hasantha Wijethunga (photo creations), as well as Rashmini Karunarathna and Niranjan Karunarathana. This work was financially supported by the Rufford Foundation (23951-1; fieldwork and lab work) to SK, and by the Russian Science Foundation (19-14-00050; molecular and phylogenetic analyses) to NAP. Finally, we would like to thank Aaron Bauer and Lee Grismer for their constructive criticisms of an earlier draft that helped to significantly improve this paper.