Abstract
We describe Gekko pradapdao sp. nov. from Tham Khao Chan (Khao Chan Cave), Tha Luang District, Lopburi Province, in central Thailand. The new species, a member of the subgenus Gekko, differs from all currently recognized Gekko species by the following combination of morphological characters and pattern: maximal known snout-vent length of 127.1 mm, lack of contact between nostrils and rostral, 24–28 interorbital scales between supraciliaries, 89–91 scale rows around midbody, 16–18 dorsal tubercle rows at midbody, 30–34 ventral scale rows at midbody, 11–13 precloacal pores in males, a single postcloacal tubercle on each side of the base of the tail, 13–16 subdigital lamellae on 1st toe and 17–19 on 4th toe, no Y-shaped mark on head, non-banded dorsal pattern on a dark chocolate brown to black background, and a dark brown iris. Urgent actions should be taken to evaluate the conservation status of the new species.
References
Aowphol, A., Thirakhupt, K., Nabhitabhata, J. & Voris, H.K. (2006) Foraging ecology of the Tokay gecko, Gekko gecko in a residential area in Thailand. Amphibia-Reptilia, 27 (4), 491–503.
https://doi.org/10.1163/156853806778877121
Aowphol, A., Yodthong, S., Rujirawan, A. & Thirakhupt, K. (2019) Mitochondrial diversity and phylogeographic patterns of Gekko gecko (Squamata: Gekkonidae) in Thailand. Asian Herpetological Research, 10 (3), 158–169.
https://doi.org/10.16373/j.cnki.ahr.180087
Bauer, A.M., Sumontha, M. & Pauwels, O.S.G. (2008) A new red-eyed Gekko (Reptilia: Gekkonidae) from Kanchanaburi Province, Thailand. Zootaxa, 1750 (1), 32–42.
https://doi.org/10.11646/zootaxa.1750.1.3
Chan-ard, T., Grossmann, W., Gumprecht, A. & Schulz, K.-D. (1999) Amphibians and reptiles of Peninsular Malaysia and Thailand. An illustrated checklist. Amphibien und Reptilien der Halbinsel Malaysia und Thailands. Eine illustrierte Checkliste. Bushmaster Publications, Wuerselen, 240 pp.
Gaulke, M. (2010) Gekko gecko. Reptilia, Münster, 15 (81), 47–50.
Gogoi, M., Kundu, S., Goswami, J., Saikia, D. & Pandey, N. (2018) First record of tail bifurcation in Tokey Gecko (Gekko gecko) from the Kaziranga, Assam, India: a field observation. International Journal of Experimental Research and Review, 15, 5–8.
Grossmann, W. (1987) Über einen ungewöhnlich gefärbten Tokeh aus Thailand—ein Gekko gecko (Linnaeus, 1758)? Sauria, 9 (4), 19–20.
Grossmann, W. (2006) Der Tokeh, Gekko gecko. Natur und Tier Verlag, Münster, 64 pp.
Grossmann, W. & Simon, G. (2014) Tokeh-Morphen, Gekko gecko (Linnaeus, 1758) sensu lato im Terrarium. Teil 2: “Blauköpfige Grüne”. Sauria, 36 (2), 21–35.
Grossmann, W. & Ulber, T. (1990) Ein neuer Gecko aus Zentral-Thailand: Gekko siamensis sp. nov. (Reptilia: Sauria: Gekkonidae). Sauria, 12 (3), 9–18.
Manzili, S., Ibrohim & Hamidy, A. (2020) Study of morphological variations of Gekko gecko (Linnaeus 1758) population in Indonesia. AIP Conference Proceedings, 2231, 040062.
https://doi.org/10.1063/5.0002491
Mertens, R. (1955) Über eine eigenartige Rasse des Tokehs (Gekko gecko) aus Ost-Pakistan. Senckenbergiana Biologia, 36, 21–24.
Ota, H., Hikida, T. & Matsui, M. (1991) Re-evaluation of the status of Gecko verreauxi Tytler, 1864, from the Andaman Islands, India. Journal of Herpetology, 25, 147–151.
https://doi.org/10.2307/1564641
Ota, H. & Nabhitabhata, J. (1991) A new species of Gekko (Gekkonidae: Squamata) from Thailand. Copeia, 1991, 503–509.
https://doi.org/10.2307/1446598
Panitvong, N., Sumontha, M., Konlek, K. & Kunya, K. (2010) Gekko lauhachindai sp. nov., a new cave-dwelling gecko (Reptilia: Gekkonidae) from central Thailand. Zootaxa, 2671, 40–52.
Patawang, I. & Tanomtong, A. (2015) The variation of Tokay Gecko, Gekko gecko (Linnaeus, 1758) between two populations in southern China and Indochinese Peninsula. Srinakharinwirot Science Journal, 31 (2), 175–186.
Qin, X.-M., Li, H.-.M, Zeng, Z.-H., Zeng, D.-L. & Guan, Q.-X. (2012) Genetic variation and differentiation of Gekko gecko from different populations based on mitochondrial cytochrome b gene sequences and karyotypes. Zoological Science, 29 (6), 384–389.
https://doi.org/10.2108/zsj.29.384
Qin, X., Zeng, Z. & Liang, Y. (2007) Genetic variation and differentiation of Gekko gecko from different population. Zoological Research, 28, 286–290. [in Chinese]
Rösler, H. (2001) Studien am Tokeh: 1. Gekko gecko azhari Mertens, 1955 (Sauria: Gekkonidae). Gekkota, 3, 33–46.
Rösler, H. (2005) Studien am Tokeh: 2. Intraspezifische Variation der südostasiatischen Populationen von Gekko gecko (Linnaeus, 1758). Gekkota, 5, 65–149.
Rösler, H., Bauer, A.M., Heinicke, M.P., Greenbaum, E., Jackman, T., Nguyen, T.Q. & Ziegler, T. (2011) Phylogeny, taxonomy, and zoogeography of the genus Gekko Laurenti, 1768 with the revalidation of G. reevesii Gray, 1831 (Sauria: Gekkonidae). Zootaxa, 2989 (1), 1–50.
https://doi.org/10.11646/zootaxa.2989.1.1
Shahrudin, S. (2013) Notes on Gekko smithii Gray, 1842 (Reptilia: Gekkonidae) from Sungai Sedim, Kedah, Malaysia. Herpetology Notes, 6, 83–84.
Simon, G. & Grossmann, W. (2013) Tokeh-Morphen, Gekko gecko (Linnaeus, 1758) sensu lato im Terrarium. Teil 1: “Calico”-Tokehs. Sauria, 35 (4), 37–52.
Smith, M.A. (1935) The Fauna of British India, Including Ceylon and Burma. Reptilia and Amphibia. Vol. II. Sauria. Taylor and Francis, London, xiii + 440 pp., 1 pl., 2 folding maps.
Stanner, M., Thirakhupt, K., Werner, N. & Werner, Y.L. (1998) Observations and comments on the tokay in Thailand and China as predator and as prey (Reptilia: Sauria: Gekkonidae: Gekko gecko). Dactylus, 3, 69–84.
Taylor, E.H. (1963) The lizards of Thailand. University of Kansas Science Bulletin, 44, 687–1077.
ter Borg, J. (2004) De tokkeh, Gekko gecko—een eenvoudige handleiding. Lacerta, 62 (6), 256–260.
Wood, P.L., Guo, X., Travers, S.L., Su, Y.-C., Olson, K.V., Bauer, A.M., Grismer, L.L., Siler, C.D., Moyle, R.G., Andersen, M.J. & Brown, R.F. (2020) Parachute geckos free fall into synonymy: Gekko phylogeny, and a new subgeneric classification, inferred from thousands of ultraconserved elements. Molecular Phylogenetics and Evolution, 146, 106731.
https://doi.org/10.1016/j.ympev.2020.106731
Yu, X., Peng, Y., Aowphol, A., Ding, L., Brauth, S.E. & Tang, Y.Z. (2011) Geographic variation in the advertisement calls of Gekko gecko in relation to variations in morphological features: implications for regional population differentiation. Ethology, Ecology & Evolution, 23, 211–228.
https://doi.org/10.1080/03949370.2011.566581
Zhang, Q.Q, Tang, Y.Z., Huang, Y.C. & Zeng, F.H. (1997) Investigation on the geographical variance of the tokay, Gekko gecko. Chinese Journal of Zoology, 32, 44–46. [in Chinese]
Zhang, Y., Chen, C., Li, L., Zhao, C., Chen, W. & Huang, Y. (2014) Insights from ecological niche modeling on the taxonomic distinction and niche differentiation between the black-spotted and red-spotted tokay geckoes (Gekko gecko). Ecology and Evolution, 4 (17), 3383–3394.
https://doi.org/10.1002/ece3.1183
Zhang, Y.Y., Mo, X.C., Zeng, W.M. & Hu, D.N. (2006) A molecular phylogeny of red tokay and black tokay (Gekko gecko) based on mitochondrial 12S rRNA gene sequences. Guangxi Medical Journal, 28, 793–796.