Pletholax gracilis (COPE, 1864)

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Higher Taxa	Pygopodidae, Gekkota, Sauria, Squamata (lizards)
Subspecies
Common Names	E: Slender Slider
Synonym	Pygopus gracilis COPE 1864: 229 Pletholax gracilis — BOULENGER 1885: 245 Pletholax gracilis — KLUGE 1974: 146 Pletholax gracilis — KLUGE 1993 Pletholax gracilis — COGGER 2000: 296 Pletholax gracilis — WILSON & SWAN 2010 Pletholax gracilis — KEALLEY et al. 2020
Distribution	Australia (Western Australia: lower west coast) Type locality: South Western Australia
Reproduction	oviparous
Types	Holotype: RMNH 3670
Diagnosis	Diagnosis (genus). Extremely slender small pygopod species, distinguishable from all other genera by keeled scales completely encircling body and tail, including unenlarged ventral row (Kealley et al. 2020). Additional details (319 characters) are available for collaborators and contributors. Please contact us for details.
Comment	SCHLEGEL is sometimes given as author of this species, based on a statement in COPE: “P[letholax]. gracilis is Pygopus gracilis, Schlegel (Mus. Leyden) to whom I am indebted for the opportunity of making this description”. Subspecies: Pletholax gracilis edelensis STORR 1978 has been elevated to full species by Kealley et al. 2020. Limb morphology: Limbless. Type species: Pygopus gracilis (SCHLEGEL in) COPE 1864: 229 is the type species of the genus Pletholax COPE 1864. Habitat. White and grey sandplains vegetated with Banksia woodland and heath (from collector’s notes and Shea and Peterson [1993]). Ecology. Displays both burrowing or ‘sand-swimming’ behaviour, as well as possible climbing on to low vegetation (Shea and Peterson, 1993). Diet: Termites with occasional observations of nectar feeding have been reported (Ehmann [1992; Shea and Peterson [1993]; Bush et al. [2007]). Reproduction: occurs in spring, with two eggs per clutch (Shea and Peterson, 1993). Distribution: see map (Fig. 2) in Kealley et al. 2020: 2.
Etymology	Named after Latin “gracilis”, meaning small or lanky, or gracile. The genus is, according to Storr et al. (1990): “Possibly based on Greek stem pleth- denoting fullness or completeness, in allusion to the strong keeling” (p. 126).
References	Bamford, M. J. 1998. Field observations on the semi-arboreal pygopodids Aclys concinna (Kluge 1974) and Pletholax gracilis (Cope 1864). Herpetofauna (Sydney) 28 (2): 2-4 Boulenger, G.A. 1885. Catalogue of the lizards in the British Museum (Nat. Hist.) I. Geckonidae, Eublepharidae, Uroplatidae, Pygopodidae, Agamidae. London: 450 pp. - get paper here Cogger, H. G. 2014. Reptiles and Amphibians of Australia, 7th ed. CSIRO Publishing, xxx + 1033 pp. - get paper here Cogger, H.G. 2000. Reptiles and Amphibians of Australia, 6th ed. Ralph Curtis Publishing, Sanibel Island, 808 pp. Cope, E.D. 1864. On the characters of the higher groups of Reptilia - Squamata - and especially y of the Diploglossa. Proc. Acad. Nat. Sci. Philadelphia 1864: 224-231 - get paper here Glauert, L. 1956. Herpetological Miscellanea VIII Snake Lizards and Worm Lizards (Family Pygopodidae). Western Australian Naturalist 5 (6): - get paper here Kealley, Luke; Paul Doughty, Danielle Edwards and Ian G. Brennan 2020. Taxonomic assessment of two pygopodoid gecko subspecies from Western Australia. Israel J Ecol Evol 66 (3-4): 126-141 - get paper here Kinghorn, J. Roy 1926. A brief review of the family Pygopodidae. Rec. Austral. Mus. 15 (1): 40-64 - get paper here Kluge, Arnold G. 1976. Phylogenetic relationships in the lizard family Pygopodidae: an evaluation of theory, methods and data. Miscellaneous Publications, Museum of Zoology, University of Michigan (152): 1-72 - get paper here Laube, A. & Langner, C. 2007. Die “Geckos” Australiens. Draco 8 (29): 4-21 - get paper here Maryan, B., Gaikhorst, G., & Parkhurst, B. 2024. The terrestrial herpetofauna of the Zuytdorp coast and hinterland of Western Australia: Exceptional richness in a global biodiversity hotspot. Western Australian Naturalist, 33, 3 Schlegel, [H.] 1865. Pygopus gracilis. p. 229. In: Cope, E. D. On the characters of the higher groups of REPTILIA SQUAMATA--and especially of the DIPLOGLOSSA. Proc. Acad. Nat. Sci. Philadelphia 1864: 224-231 - get paper here Shea G M. & Peterson M. 1993. Notes on the biology of the genus Pletholax Cope (Squamata: Pygopodidae). Rec. West. Austr. Mus. 16 (3): 419-425. - get paper here Storr G M 1978. Taxonomic notes on the reptiles of the Shark Bay region, Western Australia. Rec. West. Aust. Mus. 6 (3): 303-318 - get paper here Wilson, S. & Swan, G. 2010. A complete guide to reptiles of Australia, 3rd ed. Chatswood: New Holland, 558 pp.
External links	IUCN Red List National Center for Biotechnology Information http://www.amonline.net.au/herpetology/research/pdf/pygopodidae.pdf http://www.arod.com.au/arod/reptilia/Squamata/Pygopodidae/Pletholax… Google images

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