Abstract
We describe a new species of Leptolalax from central Vietnam. Leptolalax firthi sp. nov. is distinguished from its congeners bya combination of the following characters: an absence of distinct dark brown or black dorsolateral markings; toes with rudimen-tary webbing and wide lateral dermal fringes in males and weak or absent lateral dermal fringes in females; most males withwide lateral dermal fringes on Finger II; medium size (26.4–29.2 mm in 21 adult males, 25.7–36.9 mm in 14 females); and nearimmaculate white chest and belly. The male advertisement call of the new species, consisting of 2–5 notes with a dominant fre-quency of 5.4–6.6 kHz (at 18.3–21.2º C) is also unique among Leptolalax species for which calls are known. Uncorrectedsequence divergences between L. firthi and all homologous 16S rRNA sequences available were >10%. At present, the newspecies is known from montane evergreen forest between ~860–1720 m elevation in Kon Tum and Quang Nam Provinces. Theextreme sexual dimorphism observed in L. firthi in terms of lateral dermal fringing, a morphological character often used to dis-tinguish Leptolalax species, highlights the importance of ensuring interspecific comparisons in the genus are performed separately for each sex.References
Anderson, J. (1871) A list of the reptilian accession to the Indian Museum, Calcutta, from 1865 to 1870, with a description of some new species. Journal of the Asiatic Society of Bengal, 40, 12–39.
Boulenger, G.A. (1893) Concluding report on the reptiles and batrachians obtained in Burma by Signor L. Fea, dealing with the collection made in Pegu and the Karin Hills in 1887-88. Annali del Museuo Civico di Genoa, 13, 304–347.
Boulenger, G.A. (1900) Descriptions of new batrachians and reptiles from the Larut Hills, Perak. Annals and Magazine of Natural History, 6 (series 7), 186–194.
Boulenger, G.A. (1908) A revision of the Oriental pelobatid batrachians (genus Megalophrys). Proceedings of the Zoological Society of London, 1908, 407–430.
Brown, R.M. & Richards, S.J. (2008) Two new frogs of the genus Platymantis (Anura: Ceratobatrachidae) from the Isabel Island group, Solomon Islands. Zootaxa, 1888, 47–68.
Cocroft, R.B. & Ryan, M.J. (1995) Patterns of advertisement call evolution in toads and chorus frogs. Animal Behaviour, 49, 283–303.
Das, I., Lyngdoh Tron, R.K., Rangad, D., & Hooroo, R.N.K. (2010) A new species of Leptolalax (Anura: Megophryidae) from the sacred groves of Mawphlang, Meghalaya, north-eastern India. Zootaxa, 2339, 44–56.
Delorme, M., Dubois, A., Grosjean, S., & Ohler, A. (2006) Une nouvelle ergotaxinomie des Megophryidae (Amphibia, Anura). Alytes, 24, 6–21.
Doughty, P., Anstis, M., & Price, L. C. (2009) A new species of Crinia (Anura: Myobatrachidae) from the high rainfall zone of the northwest Kimberley, Western Australia. Records of the Western Australian Museum, 25, 127–144.
Dubois, A. (1983) Note preliminaire sur le genre Leptolalax Dubois, 1980 (Amphibiens, Anoures), avec diagnose d’une espece novelle du Vietnam. Alytes, 2, 147–153.
Dubois, A. (1987 “1986”) Miscellanea taxinomica batrachologia (I). Alytes, 5, 7–95.
Duellman, W.E. (1970) The Hylid Frogs of Middle America. Monograph of the Museum of Natural History, University of Kansas, 1, 1–427.
Fei, L., Hu, S., Ye, C. & Huang, Y. (2009). Fauna Sinica. Amphibia Vol. 2 Anura. Science Press, Beijing. 957 pp.
Fei, L., Ye, C. & Huang, Y. (1991 “1990”) Key to Chinese Amphibia. Chongqing Branch Science and Technology Literature Press, Chongquing. 364 pp.-
Fei, L., Ye, C. & Jiang, J. (2010). Colored Atlas of Chinese Amphibians. Sichuan Publishing Group. Sichuan Publishing House of Science & Technology, Sichuan, 519 pp.
Frost D.R. (2011) Amphibian species of the world: an online reference. Version 5.5 (31 January, 2011). American Museum of Natural History, New York, USA. Available from http://research.amnh.org/vz/herpetology/amphibia/ (accessed 13 January 2012).
Gerhardt, H.C., & Huber, F. (2002) Acoustic Communication in Insects and Anurans: Communication Problems and Diverse Solutions. University of Chicago Press, Chicago and London. 516 pp.
Grismer, L.L., Grismer, J.L. & Youmans, T.M. (2004). A new species of Leptolalax (Anura: Megophryidae) from Pulau Tioman, West Malaysia. Asiatic Herpetological Research, 10, 8–10.
Günther, A. (1872) On the reptiles and amphibians of Borneo. Proceedings of the scientific meetings of the Zoological Society of London, 1872, 586–600.
Humtsoe, L.N., Bordoloi, S., Ohler, A. & Dubois, A. (2008) Rediscovery of a long known species, Ixalus lateralis Anderson, 1871. Zootaxa, 1921, 24–34.
Inger, R.F., Lakim, M., Biun, A. & Yambun, P. (1997) A new species of Leptolalax (Anura: Megophryidae) from Borneo. Asiatic Herpetological Research, 7, 48–50.
Inger, R.F., Orlov, N. & Darevsky, I. (1999) Frogs of Vietnam: a report on new collections. Fieldiana Zoology, 92, 1–46.
Inger, R.F. & Stuebing, R.B. (2005) A Field Guide to the Frogs of Borneo. 2nd edition. Natural History Publications, Kota Kinabalu. 201 pp.
Inger, R. F., Stuebing, R. B., & Tan F.-L. (1995) New species and new records of anurans from Borneo. Raffles Bulletin of Zoology, 43, 115–132.
IUCN. (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission. IUCN, Gland, Switzerland and Cambridge, UK. ii + 30 pp.
Jiang, J.-P., Xie, F., Fei, L., Ye, C. & Zheng, M-Q. (2002) Mating calls of six forms of pelobatid in Wawu Mountain national forest park, Sichuan, China (Anura: Pelobatidae). Zoological Research, 23, 89–94.
Kupfer, A. (2007) Sexual size dimorphism in amphibians: an overview. In Fairbairn, D.J., Blanckenhorn, W.U., Székely, T. Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. Oxford University Press, New York, USA. 280 pp.
Lathrop, A., Murphy, R. W., Orlov, N. & Ho, C. T. (1998) Two new species of Leptolalax (Anura: Megophryidae) from northern Vietnam. Amphibia-Reptilia, 19, 253–267.
Liu, C-C. (1950) Amphibians of western China. Fieldiana: Zoology Memoirs, 2, 1–400.
Malkmus, R. (1992) Leptolalax pictus sp.n. (Anura: Pelobatidae) vom Mount Kinabalu/Nord-Borneo. Sauria, 14, 3–6.
Malkmus, R., Manthey, U., Vogel, G., Hoffman, P., & Kosuch, J. (2002) Amphibians & Reptiles of Mount Kinabalu (North Borneo). ARG Ganter Verlag Kommanditgesellschaft, Ruggell. 424 pp.
Matsui, M. (1997) Call characteristics of Malaysian Leptolalax with a description of two new species (Anura: Pelobatidae). Copeia, 1997, 158–165.
Matsui, M. (2006) Three new species of Leptolalax from Thailand (Amphibia, Anura, Megophryidae). Zoological Science, 23, 821–830.
Matsui, M., Belabut, D.M., Ahmad, N., & Yong, H-S. (2009) A new species of Leptolalax (Amphibia, Anura, Megophryidae) from Peninsular Malaysia. Zoological Science, 26, 243–247.
Ohler, A., Marquis, O., Swan, S. & Grosjean, S. (2000) Amphibian biodiversity of Hoang Lien Nature Reserve (Lao Cai Province, northern Vietnam) with description of two new species. Herpetozoa, 13, 71–87.
Ohler, A., Wollenberg, K. C., Grosjean, S., Hendrix, R., Vences, M., Ziegler, T., & Dubois, A. (2011) Sorting out Lalos: description of new species and additional taxonomic data on megophryid frogs from northern Indochina (genus Leptolalax, Megophryidae, Anura). Zootaxa, 3147, 1–83.
Palumbi, S.R., Martin, A., Romano, S., McMillan, W.O., Stice, L. & Grabowski, G. (1991) The simple fool's guide to PCR. Department of Zoology, University of Hawaii, Honolulu. 47 pp.
Rowley, J.J.L, & Cao, T.T. (2009) A new species of Leptolalax (Anura: Megophryidae) from central Vietnam. Zootaxa, 2198, 51–60.
Rowley, J. J. L., Stuart, B. L., Richards, S. J., Phimmachak, S., & Sivongxay, N. (2010a) A new species of Leptolalax (Anura: Megophryidae) from Laos. Zootaxa, 2681, 35–46
Rowley, J. J. L., Hoang D. H., Le T. T. D., Dau Q. V., & Cao T. T. (2010b) A new species of Leptolalax (Anura: Megophryidae) from Vietnam and further information on Leptolalax tuberosus. Zootaxa, 2660, 33–45.
Rowley, J. J. L., Stuart, B. L., Neang, T., & Emmett, D. A. (2010c) A new species of Leptolalax (Anura: Megophryidae) from northeastern Cambodia. Zootaxa, 2567, 57–68.
Rowley, J. J. L., Le, D. T. T., Tran, D. T. A., & Hoang, D. H. (2011). A new species of Leptolalax (Anura: Megophryidae) from southern Vietnam. Zootaxa, 2796, 15–28.
Sengupta, S., Sailo, S., Lalremsanga, H. T., Das, A., & Das, I. (2010). A new species of Leptolalax (Anura: Megophryidae) from Mizoram, North-eastern India, Zootaxa, 2406, 57–68.
Sukumaran, J., Das, I. & Haas, A. (2010) Descriptions of the advertisement calls of some Bornean frogs. Russian Journal of Herpetology, 17, 189–194.
Vences, M., M. Thomas, R. M. Bonett & Vieites D. R. (2005) Deciphering amphibian diversity through DNA barcoding: chances and challenges, Philosophical Transactions of the Royal Society London, Ser. B, 360, 1859–1868.
Xu, J-X., Xie, F., Jiang, J-P., Mo, Y-M., & Zheng, Z-H. (2005) The acoustic features of the mating call of 12 anuran species. Chinese Journal of Zoology, 40, 12–19.