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Ctenotus delli STORR, 1974

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Higher TaxaScincidae, Sphenomorphinae (Sphenomorphini), Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Darling Range South-west Ctenotus 
SynonymCtenotus delli STORR 1974: 92
Ctenotus delli — COGGER 1983: 145
Ctenotus delli — COGGER 2000: 421
Ctenotus delli — WILSON & SWAN 2010 
DistributionAustralia (Western Australia)

Type locality: 6 mi E of Kalamunda, in 31° 57’ S, 116'08’ E, W. A.  
Reproductionoviparous 
TypesHolotype: WAM R37478 
DiagnosisDiagnosis: A small member of the labillardieri group with legs dark olive, finely peppered with black and white. Further distinguishable from labillardieri by broken white dorsolateral line, and from gemmula by upper labials usually 7 (rather than 8) (Storr 1974: 92).

Description. Snout-vent length (mm): 34-63 (45.0). Length of appendages (% SVL): tail 156- 179 (168); foreleg 24-32 (27.7); hindleg 35-45 (41.1). Nasals usually separated, occasionally in short contact. Prefrontals separated, usually widely. Supraoculars 4, first 2 in contact with frontal. Supraciliaries usually 7, occasionally 8. Palpe brals 8-12 (9.7). Second loreal 1.3-1.8 (1.52) t'mes as wide as high. Upper labials usually 7, occasionally 8. Ear lobules 3-5 (4.0), obtuse, very small (especially compared to width of aperture). Nuchals 3 or 4 (3.3). Midbody scale rows 28-36 (29.9). Lamellae under fourth toe 23-29 (25.7), each with a dark, narrow callus. Dorsally dark olive brown, unmarked except for narrow indistinct black laterodorsal stripe from brow nearly to tail. White dorsolateral line from brow to tail (on which it becomes suffused with brown), broken, except anteriorly, into a series of short dashes. Black upper lateral zone from orbit nearly to end of tail, bearing one or more series of white dots. White mid- lateral stripe broken into series of short dashes, extending forward to below eye and indistinctly backward to about base of tail. Lower lateral zone dark grey flecked with white (Storr 1974: 92). 
CommentLimb morphology: 5 digits, 5 toes (Singhal et al. 2018, Cogger 2014) 
EtymologyNamed after Dr. John Dell, former herpetologist at the Western Australian Museum, Perth, who collected the holotype of this skink. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - 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.
  • Couper, P., Covacevich, J., Amey, A. & Baker, A. 2006. The genera of skinks (Family Scincidae) of Australia and its island territories: diversity, distribution and identification. in: Merrick, J.R., Archer, M., Hickey, G.M. & Lee, M.S.Y. (eds.). Evolution and Zoogeography of Australasian Vertebrates. Australian Scientific Publishing, Sydney, pp. 367-384
  • KAY, GEOFFREY M. & J. SCOTT KEOGH 2012. Molecular phylogeny and morphological revision of the Ctenotus labillardieri (Reptilia: Squamata: Scincidae) species group and a new species of immediate conservation concern in the southwestern Australian biodiversity hotspot. Zootaxa 3390: 1–18 - get paper here
  • Singhal, Sonal; Huateng Huang, Maggie R. Grundler, María R. Marchán-Rivadeneira, Iris Holmes, Pascal O. Title, Stephen C. Donnellan, and Daniel L. Rabosky 2018. Does Population Structure Predict the Rate of Speciation? A Comparative Test across Australia’s Most Diverse Vertebrate Radiation. The American Naturalist - get paper here
  • Storr, G. M. 1974. The genus Ctenotus (Lacertilia: Scincidae) in the South-west and Eucla Divisions of Western Australia. J R. Soc. West. Aust. 56: 86-93 [1973]
  • Storr, G. M., Smith, L. A. & Johnstone, R. E. 1981. Lizards of Western Australia. I. Skinks. Perth: University of Western Australia Press and Western Australian Museum, 200 pp.
  • Storr, G. M.; L. A. Smith, and R. E. Johnstone 1999. Lizards of Western Australia. I. Skinks. Revised Edition. Western Australian Museum
  • Wilson, S. & Swan, G. 2010. A complete guide to reptiles of Australia, 3rd ed. Chatswood: New Holland, 558 pp.
 
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