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Ctenotus allotropis STORR, 1981

IUCN Red List - Ctenotus allotropis - Least Concern, LC

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Higher TaxaScincidae, Sphenomorphinae (Sphenomorphini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Brown-blazed Wedgesnout Ctenotus 
SynonymCtenotus allotropis STORR 1981: 142
Ctenotus allotropis — COGGER 2000: 413
Ctenotus allotropis — WILSON & SWAN 2010 
DistributionAustralia (New South Wales, Queensland)

Type locality: Round Hill Fauna Reserve, near Euabalong, N. S. W.  
TypesHolotype: AMS (AM) R27832 
DiagnosisDiagnosis: “A sharply patterned member of the C. schomburgkii group with nasals in contact and prefrontals widely separated, distinguishable from all other members of the group by the blackish, relatively wide keels of the proximal subdigital lamellae. Further distinguishable from C. s. strauchii by second supraocular not narrower than third. For other differences between C. allotropis and sympatric C. s. strauchii, see under Remarks.” (Storr 1981)

Description: “Snout-vent length (mm): 29-54 (N 25, mean 43.9). Length of appendages (% SVL): foreleg 22-29 (N 25, mean 25.6), hindleg 40-49 (N 25, mean 44.7), tail 130-182 (N 14, mean 161.9). Nasals in very short to moderately long contact. Prefrontals widely to very widely separated. Supraoculars 4, first 3 in contact with frontal; second as wide as third (N 3) or wider (22). Supraciliaries 6 (N 5) or 7 (19), fourth to penultimate much smaller than others. Upper ciliaries 7-10 (N 21, mean 9.0). Second loreal 1.3-2.1 times as wide as high (N 24, mean 1.76). Presuboculars 2. Upper labials 7 (N 22) or 8 (2). Ear lobules 3-6 (N 24, mean 3.5), obtuse or subacute, small. Nuchals 3 or 4 (N 24, mean 3.7). Midbody scale rows 26-32 (N 25, mean 28.2). Lamellae under fourth toe 17-22 (N 24, mean 19.6), each with a blackish-brown keel (proximal keels obtuse, distal keels fine and mucronate).” (Storr 1981)

Coloration: “Dorsally brown, paler and more reddish on tail. Black laterodorsal stripe from orbit to base of tail, enclosing a series of pale reddish-brown or brownish-white spots. Narrow white dorsolateral stripe from orbit to base of tail; on tail wider and pale reddish-brown. Upper lateral zone black, enclosing 2 or 3 series of pale reddish-brown or brownish-white dots that tend to align vertically; represented anteriorly by black loreal stripe, and on tail by black stripe enclosing a series of small brownish-white spots or broken by a series of irregular white vertical bars. Upper surface of limbs pale brown, streaked with blackish-brown. Apices of larger (outer) plantar scales blackish-brown.” (Storr 1981) 
CommentHabitat: woodland.

Limb morphology: 5 digits, 5 toes (Singhal et al. 2018, Cogger 2014) 
EtymologyFrom Greek altos (different or strange) and tropis (keel), in allusion to the obtuse keels of the proximal subdigital lamellae, unique in the C. schomburgkii group. 
  • 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. J.; Amey, A. P.; Kutt, A. S. 2002. A new species of Ctenotus (Scincidae) from central Queensland. Memoirs of the Queensland Museum 48(1):85-92 - get paper here
  • 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
  • Murphy, Michael J. and Jessica K. Murphy 2015. Survey of the reptiles and amphibians of Merriwindi State Conservation Area in the Pilliga forest of northern inland New South Wales. Australian Zoologist: 37 (4): 517-528 - 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 1981. Ten new Ctenotus (Lacertilia: Scincidae) from Australia. Rec. West. Austr. Mus. 9 (2): 125-146 - get paper here
  • Swan, G.; Sadlier, R.; Shea, G. 2017. A field guide to reptiles of New South Wales. Reed New Holland, 328 pp.
  • Wilson, S. & Swan, G. 2010. A complete guide to reptiles of Australia, 3rd ed. Chatswood: New Holland, 558 pp.
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