Skip to main content Skip to main navigation menu Skip to site footer
Type: Article
Published: 2023-09-19
Page range: 307-316
Abstract views: 251
PDF downloaded: 21

Additions to the herpetofauna of Hon Son Island, Rach Gia Bay, Kien Giang Province, southern Vietnam with a discussion of syntopy between the granite cave-adapted Bent-toed Gecko Cyrtodactylus eisenmanae and a new Cyrtodactylus of uncertain taxonomic status

Herpetology Laboratory; Department of Biology; La Sierra University; 4500 Riverwalk Parkway; Riverside; California 92505; USA. Department of Herpetology; San Diego Natural History Museum; PO Box 121390; San Diego; California; 92112; USA.
Herpetology photographer; Ho Chi Minh City; Vietnam.; 1224 W Varese Wy; Oro Valley; Arizona; 85755 USA
Reptilia ecomorphology granite cave Gulf of thailand islands new island records


An updated herpetofaunal checklist of Hon Son Island, Rach Gia Bay, Kien Giang Province, southern Vietnam is presented which reports of new records for Kaloula pulchra, Sylvirana cf. mortenseni, Cyrtodactylus sp., and Gehyra mutilata bringing the island total to 21 species. Cyrtodactylus sp. is an unidentified granite-cave adapted species that occurs in syntopy with the granite-cave adapted C. eisenmanae, bringing the total number of Cyrtodactylus on this tiny island (11.5 km2) to three. The implications of highly specialized syntopic congeneric ecomorphs is discussed.



  1. Boulenger, G.A. (1903) On a new frog from Upper Burma and Siam. Annals and Magazine of Natural History, Series 7, 12, 219.
  2. Chan, K.O. & Norhayati, A. (2010) A new insular species of Cyrtodactylus (Squamata: Gekkonidae) from northeastern Peninsular Malaysia, Malaysia, Zootaxa, 2389 (1), 47–56.
  3. Chen, J.-M., Poyarkov, N.A., Suwannapoom, C., Lathrop, A., Wu, Y.-H., Zhou, W.-W., Yuan, Z.-Y., Jin, J.-Q., Chen, H.-M., Liu, H.-Q., Nguyen, T.Q., Nguyen, S.N., Duong, T.V., Eto, K., Nishikawa, K., Matsui, M., Orlov, N.L., Stuart, B.L., Brown, R.M., Rowley, J.L., Murphy, R.W., Wang, Y.-Y. & Che, J. (2018) Large-scale phylogenetic analyses provide insights into unrecognized diversity and historical biogeography of Asian leaf-litter frogs, genus Leptolalax (Anura: Megophryidae). Molecular Phylogenetics and Evolution, 124, 162–171.
  4. Gray, J.E. (1827) A synopsis of the genera of saurian reptiles in which some new genera are indicated, and the others reviewed by actual examination, Philosophical Magazine, London, 2, 54–58.
  5. Gray, J.E. (1831) Description of two new genera of frogs discovered by John Reeves, Esq. in China. Zoological Miscellany, Part 1, 38.
  6. Grismer, L.L., Chan, K.O., E. Quah, Muin, M.A., A.E. Savage, A.E., Grismer, J.L. , Norhayati, A., Greer III, L.F. & Remegio, A.C. (2010) Another new, diminutive Rock Gecko (Cnemaspis Strauch) from Peninsular Malaysia and a discussion of resource partitioning in sympatric species pairs, Zootaxa, 2569 (1), 55–66.
  7. Grismer, L.L., Chan K., Oaks, J.R., Neang, T., Sokun, L., Murdoch, M.L., Stuart, B.L. & Grismer, J.L. (2020b) A new insular species of the Cyrtodactylus intermedius group (Squamata: Gekkonidae) group from Cambodia with a discussion of habitat preference and ecomorphology, Zootaxa, 4830 (1), 75–102.
  8. Grismer, L.L. & Grismer, J.L. (2017) A re-evaluation of the phylogenetic relationships of the Cyrtodactylus condorensis group (Squamata; Gekkonidae) and a suggested protocol for the characterization of rock-dwelling ecomorphology in Cyrtodactylus, Zootaxa, 4300 (4), 486­–504.
  9. Grismer, L.L., Grismer, J.L., Wood Jr., P.L., Ngo, V.T., Neang, V.T. & Chan, K.O. (2016) Herpetology On The Fringes Of The Sunda Shelf: A Discussion Of Discovery, Taxonomy, and Biogeography. Bonner Zoologische Monographien, 57, 57–97.
  10. Grismer L.L., Nazarov, R.A, Vladimir, V.B. & Poyarkov, N.A. (2020a) A new species of Sphenomorphus (Squamata: Scincidae) from Phu Quoc Island, Vietnam with a discussion of biogeography and character state evolution in the S. stellatus group. Zootaxa, 4801 (3), 461–487.
  11. Grismer, L.L. & Ngo, V.T. (2007) Four new species of the gekkonid genus Cnemaspis Strauch 1887 (Reptilia: Squamata) from Southern Vietnam, Herpetologica, 63, 482–500.[482:fnsotg];2
  12. Grismer, L.L., Ngo, V.T. & Grismer, J.L. (2008) A new species of insular pitviper of the genus Cryptelytrops (Squamata: Viperidae) from southern Vietnam. Zootaxa, 1715 (1), 57–68.
  13. Grismer, L.L., Pawangkhanant, P., Idiiatullina, S.S., Trofimets, A.V., Nazarov, R.A., Suwannapoom, C. & Poyarkov, N.A. (2023) A new species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) from the Thai-Malay Peninsula and the independent evolution of cave ecomorphology on opposite sides of the Gulf of Thailand, Evolutionary Systematics. [submitted]
  14. Grismer, L.L., Wood Jr., P.W., Ngo, V.T. & Murdoch, M.L. (2015) The systematics and independent evolution of cave ecomorphology in distantly related clades of Bent-toed Geckos (Genus Cyrtodactylus Gray, 1927) from the Mekong Delta and islands in the Gulf of Thailand, Zootaxa, 3980 (1), 106–126.
  15. Grismer, L.L., Wood Jr., P.L., Poyarkov, N.A., Le, M.D., Karunarathna, S., Chomdej, S. Suwannapoom, C., Qi, S., Liu, S., Che, J., Quah, E.S.H., Kraus, F., Oliver, P.M., Riyanto, A., Pauwels, O.S.H. & Grismer, J.L. (2021) Karstic Landscapes Are Foci of Species Diversity in the World’s Third-Largest Vertebrate Genus Cyrtodactylus Gray, 1827 (Reptilia: Squamata; Gekkonidae). Diversity, 13, 183.
  16. Grismer, L.L., Wood Jr., P.L., Quah, S.H.E., Anuar, S., Poyarkov, N.A., Neang, T., Orlov, N.L., Thammachoti, P. & Seiha, H. (2019) Integrative taxonomy of the Asian skinks Sphenomorphus stellatus (Boulenger, 1900) and S. praesignis (Boulenger, 1900) with the resurrection of S. annamiticus (Boettger, 1901) and the description of a new species from Cambodia. Zootaxa, 4683 (3), 381–411.
  17. Grismer, L.L., Wood, P.L., Thura, M.K., Zin, T., Quah, E.S.H., Murdoch, M.L., Grismer, M.S., Lin, A., Kyaw, H. & Lwin, N. (2018) Twelve new species of Cyrtodactylus Gray (Squamata: Gekkonidae) from isolated limestone habitats in east-central and southern Myanmar demonstrate high localized diversity and unprecedented microendemism, Zoological Journal of the Linnean Society, 182, 862–959.
  18. Ngo, V.T., Grismer, L.L. & Grismer, J.L. (2008) A new endemic cave dwelling species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) in Kien Giang Biosphere Reserve, southwestern Vietnam. Zootaxa, 1967 (1), 53–62.
  19. Ngo, V.T., Grismer, L.L. & Grismer, J.L. (2010) A new species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) in Phu Quoc National Park, Kien Giang Biosphere Reserve, southwestern Vietnam. Zootaxa, 2604 (1), 37–51.
  20. Nguyen, S.N. (2010) A new poreless species of Gekko Laurenti, 1768 (Gekkonidae: Squamata) from An Giang Province, southern Vietnam. Zootaxa, 2501 (1), 54–60.
  21. Nguyen, S.G., Orlov, N.L. & Darevsky, I.F. (2006) Descriptions of two new species of the genus Cyrtodactylus Gray, 1827 (Squamata: Sauria: Gekkonidae) from southern Vietnam. Russian Journal of Herpetology, 13, 215–226.
  22. Nurngsomsri, P., Chuaynkern, C., Duengkae, P., Sanguansombat, W., Grismer, L.L. & Chuaynkern, Y. (2019) Cyrtodactylus leegrismeri Chan and Norhayati, 2010 (Sauria: Gekkonidae): A first country record for Thailand. Songklanakarin Journal of Science and Technology, 41, 1319–1327.
  23. Poyarkov, N.A., Geissler, P., Gorin, V.A., Dunayev, E.A., Hartmann, T. & Suwannapoom, C. (2019) Counting stripes: revision of the Lipinia vittigera complex (Reptilia, Squamata, Scincidae) with description of two new species from Indochina. Zoological Researc, 40, 358–393.
  24. Sheridan, J.A. & Stuart, B.L. (2018) Hidden species diversity in Sylvirana nigrovittata (Amphibia: Ranidae) highlight the importance of taxonomic revisions in biodiversity conservation. PLoS ONE, 13, e0192766.
  25. Smith, M.A. (1921) Reptiles and Batrachians collected on Pulo Condore. Journal of the Natural History Society of Siam, 4, 93–97.
  26. Wiegmann, A.F.A. (1834) In: Dr. F. J. F. Meyen: Beiträge zur Zoologie gesammelt auf einer Reise um die Erde. Siebente Abhandlung. Amphibien. Nova Acta Physico-Medica Academia Caesarea Leopoldino-Carolina, Halle, 17, 185–268. [1835]