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Ctenotus astictus HORNER, 1995

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Higher TaxaScincidae, Sphenomorphinae (Sphenomorphini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Arnhem Striped Ctenotus 
SynonymCtenotus astictus HORNER 1995
Ctenotus astictus — COGGER 2000: 751
Ctenotus astictus — WILSON & SWAN 2010 
DistributionAustralia (Northern Territory)

Type locality: 14 kilometres west of Numbulwar on Ngukurr road, 14°14'S 135°36'E, Northern Territory.  
TypesHolotype: NTM R.11252, coli. I. Archibald, 07 June 1983
PARATYPES - NORTHERN TERRITORY: NTM R.11250- 51, same data as holotype; NTM R.14183, Lake Eames, Vanderlin Island, Sir Edward Pellew Group, 15°41'S 137°02'E; NTM R.16113, R.16134-35, R.16140-44, Cadell River crossing, 12°15'S 134°26'E; NTM R.16177, Liverpool River crossing, 12°22 'S 134°07'E; NTM R.19151, R.19153, Red Point, Marchinbar Island, Wessel Islands, 11°16'S 136°35'E; NTM R.20252, Bumaga Island, Wessel Islands, 11°46'S 136°05'E. 
DiagnosisDiagnosis: Ctenotus astictus sp. nov. is distinguished from C. arnhemensis and C. stuarti sp. nov. by having a reduced, simple lateral pattern which lacks any form of pale spots or blotches and by having generally fewerear lobules (mean of 2.9 vs means of 4.8 and 4.1 respectively). Additionally, the relative lengths of the limbs and tail are generally greater in C. astictus sp. nov. than in C. amhemensis and C. stuarti sp. nov. Ctenotus astictus sp. nov. is superficially similar to well patterned specimens of C. vertebralis, but may be distinguished by possessing a grey-brown rather than black upper lateral zone, wider second supraocular scale and fewer ear lobules and supralabial scales [HORNER 1995]. 
CommentLimb morphology: 5 digits, 5 toes (Singhal et al. 2018, Cogger 2014) 
EtymologyThe species name astictus is derived from the Greek term stiktos which means ‘spotted’.It refers to the unspotted nature of the body pattern in comparison to C. arnhemensis and C. stuarti sp. nov. [HORNER 1995]. 
  • 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
  • Horner, P. 1995. Two new species of Ctenotus (Reptilia: Scincidae) from Northern Territory. The Beagle 12: 75-88.
  • 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
  • Wilson, S. & Swan, G. 2010. A complete guide to reptiles of Australia, 3rd ed. Chatswood: New Holland, 558 pp.
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