Abstract
Two new species of geckos from the genera Cnemaspis and Hemidactylus are described from a granite outcrop in the Rishi Valley, Chittoor District, Andhra Pradesh, India. Cnemaspis rishivalleyensis sp. nov. and Hemidactylus rishivalleyensis sp. nov. are presently known only from their type locality and are 8.7 % and 10.9 % divergent from their closest known sister species, respectively. The new species are allied to the mysoriensis and murrayi clades of South Asian Cnemaspis and the brookii group of Indian Hemidactylus, respectively. The two new species can be diagnosed from regional congeners by the number and arrangement of femoral and precloacal pores and poreless scales separating these series, body size, the number of tubercles in paravertebral rows, the number of enlarged tubercles around mid-body, the number of ventral scales across mid-body, the number of lamellae beneath digit IV of pes and manus, and subtle differences in colour pattern. Four endemic geckos now have their type localities within 10 km of each other, Cnemaspis graniticola and Cyrtodactylus rishivalleyensis from Horsley Hills and the two new species from Rishi valley. The two new species are also the third endemic species each of Cnemaspis and Hemidactylus from Andhra Pradesh.
References
Agarwal, I., Thackeray, T., Pal, S. & Khandekar, A. (2020) Granite boulders act as deep-time climate refugia: a Miocene divergent clade of rupicolous Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) from the Mysore Plateau, India, with descriptions of three new species. Journal of Zoological Systematics and Evolutionary Research, 1–28. [early view]
https://doi.org/10.1111/jzs.12391
Agarwal, I., Khandekar, A., Giri, V.B., Ramakrishnan, U. & Karanth, P.K. (2019a) The hills are alive with geckos! A radiation of a dozen species on sky islands across peninsular India (Squamata: Gekkonidae, Hemiphyllodactylus). Organisms Diversity & Evolution, 19, 341–361.
https://doi.org/10.1007/s13127-019-00392-5
Agarwal, I., Bauer, A.M., Giri, V.B. & Khandekar, A. (2019b) An expanded ND2 phylogeny of the brookii and prashadi groups with the description of three new Indian Hemidactylus Oken (Squamata: Gekkonidae). Zootaxa, 4619 (3), 431–458.
https://doi.org/10.11646/zootaxa.4619.3.2
Agarwal, I., Biswas, S., Bauer, A.M., Greenbaum, E., Jackman, T.R., de Silva, A. & Batuwita, S. (2017) Cryptic species, taxonomic inflation, or a bit of both? New species phenomenon in Sri Lanka as suggested by a phylogeny of dwarf geckos (Reptilia, Squamata, Gekkonidae, Cnemaspis). Systematics and Biodiversity, 15, 427–439.
https://doi.org/10.1080/14772000.2017.1282553
Agarwal, I. (2016) Two new species of ground-dwelling Cyrtodactylus (Geckoella) from the Mysore Plateau, South India. Zootaxa, 4193 (2), 228–244.
https://doi.org/10.11646/zootaxa.4193.2.2
Agarwal, I. & Karanth, K.P. (2015) A phylogeny of the only ground-dwelling radiation of Cyrtodactylus (Squamata, Gekkonidae): diversification of Geckoella across peninsular India and Sri Lanka. Molecular Phylogenetics and Evolution, 82, 193–199.
https://doi.org/10.1016/j.ympev.2014.09.016
Agarwal, I., Giri, V.B. & Bauer, A.M. (2011) A new cryptic rock-dwelling Hemidactylus (Squamata: Gekkonidae) from south India. Zootaxa, 2765, 21–37.
https://doi.org/10.11646/zootaxa.2765.1.2
Batuwita, S. & Pethiyagoda, R. (2012) Rediscovery of the Sri Lankan ‘house gecko’ Hemidactylus pieresii Kelaart (Reptilia: Gekkonidae) with a redescription of Hemidactylus depressus Gray. Zootaxa, 3359 (1), 17–30.
https://doi.org/10.11646/zootaxa.3359.1.2
Batuwita, S., Agarwal, I. & Bauer, A.M. (2019) Description of a new diminutive, rupicolous species of day-gecko (Squamata: Gekkonidae: Cnemaspis) from southern Sri Lanka. Zootaxa, 4565 (2), 223–234.
https://doi.org/10.11646/zootaxa.4565.2.6
Bauer, A.M., Jackman, T.R., Greenbaum, E., Giri, V. & De Silva, A. (2010a) South Asia supports a major endemic radiation of Hemidactylus geckos. Molecular Phylogenetics and Evolution, 57, 343–352.
https://doi.org/10.1016/j.ympev.2010.06.014.
Bauer, A.M., Jackman, T.R., Greenbaum, E., de Silva, A., Giri, V.B. & Das, I. (2010b) Molecular evidence for the taxonomic status of Hemidactylus brookii group taxa (Squamata: Gekkonidae). The Herpetological Journal, 20, 129–138.
Das, I. & Bauer, A.M. (2000) Two new species of Cnemaspis from Tamil Nadu, southern India. Russian Journal of Herpetology, 7, 17–28.
Ganesh, S.R. & Arumugam, M. (2016) Species richness of montane herpetofauna of southern Eastern Ghats, India: a historical resume and a descriptive checklist. Russian Journal of Herpetology, 23, 7–24
Giri, V.B., Agarwal, I. & Bauer, A.M. (2009a) Designation of a neotype for Cnemaspis mysoriensis (Jerdon 1853) (Sauria: Gekkonidae), with a redescription and notes on its distribution and habitat. Russian Journal of Herpetology, 16, 256–264.
Giri, V.B., Bauer, A.M. & Gaikwad, K.S. (2009b) A new ground-dwelling species of Cnemaspis Strauch (Squamata: Gekkonidae) from the northern Western Ghats, Maharashtra, India. Zootaxa, 2164, 49–60.
Karanth, K.P. (2015) An island called India: phylogenetic patterns across multiple taxonomic groups reveal endemic radiations. Current Science, 108, 1847–1851.
Karunarathna, S., Bauer, A.M., de Silva, A., Surasinghe, A., Somaratna, L., Madawala, M., Gadbage, D., Botejue, M., Henkanaththegedara, S. & Ukuwela, K.D.B. (2019) Description of a new species of the genus Cnemaspis Strauch, 1887 (Reptilia: Squamata: Gekkonidae) from the Nilgala Savannah forest, Uva Province of Sri Lanka. Zootaxa, 4545 (3), 398–407.
https://doi.org/10.11646/zootaxa.4545.3.4
Kathriner, A., O’shea, M. & Kaiser, H. (2014) Re-examination of Hemidactylus tenkatei van Lidth de Jeude, 1895: Populations from Timor provide insight into the taxonomy of the H. brookii Gray, 1845 complex (Squamata: Gekkonidae). Zootaxa, 3887 (5), 583–599.
https://doi.org/10.11646/Zootaxa.3887.5.5
Khandekar, A. (2019) A new species of rock-dwelling Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) from Tamil Nadu, southern India. Zootaxa, 4571 (3), 383–397.
https://doi.org/10.11646/zootaxa.4571.3.6
Khandekar, A., Gaitonde, N. & Agarwal, I. (2019) Two new Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) from the Shevaroy massif, Tamil Nadu, India, with a preliminary ND2 phylogeny of Indian Cnemaspis. Zootaxa, 4609 (1), 68–100.
https://doi.org/10.11646/zootaxa.4609.1.3
Khandekar, A., Thackeray, T. & Agarwal, A. (2019b) Two more new species of Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) from the northern Western Ghats, Maharashtra, India. Zootaxa, 4656 (1), 43–70.
https://doi.org/10.11646/zootaxa.4656.1.2
Lajmi, A., Bansal, R., Giri, V., Karanth, K.P. (2019) Phylogeny and biogeography of the endemic Hemidactylus geckos of the Indian subregion suggest multiple dispersals from Peninsular India to Sri Lanka. Zoological Journal of the Linnean Society, 186, 286–301.
https://doi.org/10.1093/zoolinnean/zly047
Lajmi, A., Giri, V.B. & Karanth, K.P. (2016) Molecular data in conjunction with morphology help resolve the Hemidactylus brookii complex (Squamata: Gekkonidae). Organisms Diversity & Evolution, 16, 659–677.
https://doi.org/10.1007/s13127-016-0271-9
Macey, J.R., Larson, A., Ananjeva, N.B., Fang, Z. & Papenfuss, T.J. (1997) Two novel gene orders and the role of light-strand replication in rearrangement of the vertebrate mitochondrial genome. Molecular Biology and Evolution, 14, 91–104.
https://doi.org/10.1093/oxfordjournals.molbev.a025706
Mahony, S. (2009) A new species of gecko of the genus Hemidactylus (Reptilia: Gekkonidae) from Andhra Pradesh, India. Russian Journal of Herpetology, 16, 27–34.
Mahony, S. (2011) Taxonomic revision of Hemidactylus brookii Gray: a re-examination of the type series and some Asian synonyms, and a discussion of the obscure species Hemidactylus subtriedrus Jerdon (Reptilia: Gekkonidae). Zootaxa, 3042, 37–67.
https://doi.org/10.11646/zootaxa.3042.1.4
Manamendra-Arachchi, K., Batuwita, S. & Pethiagoda, R. (2007) A taxonomic revision of the Sri Lankan day-geckos (Reptilia: Gekkonidae: Cnemaspis), with description of new species from Sri Lanka & southern India. Zeylanica, 7, 9–122.
Murthy, C.H.B., Anandan, N., Sengupta, S. & Deepak, P. (2019) A new species of Day Gecko of the genus Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) from the Nilgiri Hills, Tamil Nadu, India. Records of the Zoological Survey of India, 119, 211–226.
https://doi.org/10.26515/rzsi/v119/i3/2019/143339
Ramachandran, V., Robin, V.V., Tamma, K. & Ramakrishnan, U. (2017) Climatic and geographic barriers drive distributional patterns of bird phenotypes within peninsular India. Journal of Avian Biology, 48, 620–630.
https://doi.org/10.1111/jav.01278
Sayyed, A., Grismer, L.L., Campbell, D.P. & Dileepkumar, R. (2019) Description of a new cryptic new species of Cnemaspis Strauch, 1887 (Squamata: Gekkonidae) from the Western Ghats of Kerala State of India. Zootaxa, 4656 (3), 501–514.
https://doi.org/10.11646/zootaxa.4656.3.7
Smith, M.A. (1935) The Fauna of British India, Including Ceylon and Burma; Reptilia and Amphibia. Vol. II. Sauria. Taylor and Francis, London, xiv + 440 pp., 2 folding maps, 1 pl.
Sreekar, R., Shreekanth, D. & Yashada, K. (2010) Predation on Hemidactylus treutleri (Squamata: Gekkonidae) by the peninsular rock agama Psammophilus dorsalis (Squamata: Agamidae) in Rishi valley, Andhra Pradesh, India. Herpetology Notes, 3, 33–35.
Srinivasulu, C., Srinivasulu, A. & Kumar, G.C. (2018) A new cryptic rock-dwelling Hemidactylus Oken, 1817 (Squamata: Gekkonidae) from northern Karnataka, India. Zootaxa, 4444 (1), 25–42.
https://doi.org/10.11646/zootaxa.4444.1.2
Tamura, K., Peterson, D., Peterson, N., Stecher, G., Nei, M. & Kumar, S. (2011) MEGA5: Molecular evolutionary genetics analysis using maximum likelihood, evolutionary distance, and maximum parsimony methods. Molecular Biology and Evolution, 28, 2731–2739.
https://doi.org/10.1093/molbev/msr121
Uetz, P., Freed, P. & Hošek, J. (2020) The Reptile Database. Available from: http://reptile-database.reptarium.cz (accessed 10 February 2020)
Valdiya, K.S. & Sanwal, J. (2017) Mysore Plateau and Nilgiri Massif. In: Valdiya, K.S. & Sanwal, J. (Eds.), Developments in Earth Surface Processes, 22, pp. 279–306.
https://doi.org/10.1016/B978-0-444-63971-4.00012-8
Wickramasinghe, L.J.M. & Munindradasa, D.A.I. (2007) Review of the genus Cnemaspis Strauch, 1887 (Sauria: Gekkonidae) in Sri Lanka with the description of five new species. Zootaxa, 1490 (1), 1–63.
https://doi.org/10.11646/zootaxa.1490.1.1