Abstract
We describe Dixonius pawangkhananti sp. nov. from coastal limestone hills in Cha-am District, Phetchaburi Province, peninsular Thailand. The new species differs from all currently recognized Dixonius by the following combination of morphological characters and pattern: maximal known snout-vent length of 42.6 mm; 16 longitudinal rows of dorsal tubercles; 30 to 32 paravertebral scales; 16 longitudinal rows of ventral scales across the abdomen; six precloacal pores in males, no pores in females; a marked canthal stripe; and a sexually dimorphic dorsal pattern consisting of bands (males) or blotches (females). This description brings the number of Dixonius species to ten, with four species endemic to Thailand.
References
Annandale, N. (1905a) Notes on some Oriental geckos in the Indian Museum, Calcutta, with descriptions of new forms. The Annals and Magazine of Natural History, Series 7, 15 (85), 26–32.
https://doi.org/10.1080/03745480509443635
Annandale, N. (1905b) Contributions to Oriental herpetology II.- Notes on the Oriental lizards in the Indian Museum, with a list of the species recorded from British India and Ceylon. Part I. Journal & Proceedings of the Asiatic Society of Bengal, 1, 81–93, pls. I–II.
Bauer, A.M., Sumontha, M., Grossmann, W., Pauwels, O.S.G. & Vogel, G. (2004) A new species of Dixonius (Squamata: Gekkonidae) from Kanchanaburi Province, western Thailand. Current Herpetology, 23 (1), 17–26.
https://doi.org/10.5358/hsj.23.17
Botov, A., Phung, T.M., Nguyen, Q.T., Bauer, A.M., Brennan, I.G. & Ziegler, T. (2015) A new species of Dixonius (Squamata: Gekkonidae) from Phu Quy Island, Vietnam. Zootaxa, 4040 (1), 48–58.
https://doi.org/10.11646/zootaxa.4040.1.4
Boulenger, G.A. (1898) Third report on additions to the lizard collection in the Natural History Museum. Proceedings of the Zoological Society of London, 1898, 912–923.
https://doi.org/10.1111/j.1096-3642.1898.tb03194.x
Das, I. (2004) A new species of Dixonius (Squamata: Gekkonidae) from southern Vietnam. The Raffles Bulletin of Zoology, 52 (2), 629–634.
Mocquard, F. (1904) Lézards recueillis par M. A. Pavie en Indo-Chine. In: Pavie, A. (Ed.), Mission Pavie Indo-Chine 1879–1895. Études diverses. III. Recherches sur l’histoire naturelle de l’Indo-Chine orientale. Ernest Leroux, Paris, pp. 486–488, pl. XXXIII Fig. 1
Ngo, V.T. & Ziegler, T. (2009) A new species of Dixonius from Nui Chua National Park, Ninh Thuan Province, southern Vietnam (Squamata, Gekkonidae). Zoosystematics and Evolution, 85 (1), 117–125.
https://doi.org/10.1002/zoos.200800018
Nguyen, T.H., Sitthivong, S., Ngo, H.T., Luu, V.Q., Nguyen, T.Q., Le, M.D. & Ziegler, T. (2020) A new species of Dixonius (Squamata: Gekkonidae) from the karst forest of Khammouane Province, central Laos. Zootaxa, 4759 (4), 530–542.
https://doi.org/10.11646/zootaxa.4759.4.4
Pauwels, O.S.G. & Chan-ard, T. (2006) Reptiles of Kaeng Krachan National Park, western Thailand. Natural History Bulletin of the Siam Society, 54 (1), 89–108.
Pauwels, O.S.G., Chan-ard, T., Wanchai, P., Kheowyoo, B. & Bauer, A.M. (2009) Reptile diversity of Phetchaburi Province, western Thailand: an update. Hamadryad, 34(1), 9–21.
Pauwels, O.S.G., David, P., Chimsunchart, C. & Thirakhupt, T. (2003) Reptiles of Phetchaburi Province, western Thailand: a list of species, with natural history notes, and a discussion on the biogeography at the Isthmus of Kra. The Natural History Journal of Chulalongkorn University, 3 (1), 23–53.
Sumontha, M., Chomngam, N., Phanamphon, E., Pawangkhanant, P., Viriyapanon, C., Thanaprayotsak, W. & Pauwels, O.S.G. (2017) A new limestone-dwelling leaf-toed gecko (Gekkonidae: Dixonius) from Khao Sam Roi Yot massif, peninsular Thailand. Zootaxa, 4247 (5), 556–568.
https://doi.org/10.11646/zootaxa.4247.5.2
Taylor, E.H. (1962) New oriental reptiles. University of Kansas Science Bulletin, 43, 209–263.
https://doi.org/10.5962/bhl.part.13346
Taylor, E.H. (1963) The lizards of Thailand. The University of Kansas Science Bulletin, 44 (14), 687–1077.
Ziegler, T., Botov, A., Nguyen, T.T., Bauer, A.M., Brennan, I.G., Ngo, H.T. & Nguyen, Q.T. (2016) First molecular verification of Dixonius vietnamensis Das, 2004 (Squamata: Gekkonidae) with the description of a new species from Vinh Cuu Nature Reserve, Dong Nai Province, Vietnam. Zootaxa, 4136 (3), 553–566.
https://doi.org/10.11646/zootaxa.4136.3.7