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Oligosoma oliveri (MCCANN, 1955)

IUCN Red List - Oligosoma oliveri - Near Threatened, NT

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Higher TaxaScincidae, Eugongylinae, Scincoidea, Sauria, Squamata (lizards) 
Subspecies 
Common NamesMarbled Skink, Oliver's New Zealand Skink 
SynonymLeiolopisma oliveri MCCANN 1955
Leiolopisma oliveri — GREER 1974: 16
Leiolopisma oliveri - ROBB 1975
Leiolopisma pachysomaticum ROBB 1975
Cyclodina oliveri - HARDY 1977
Cyclodina oliveri - WELLS & WELLINGTON 1985
Cyclodina pachysomaticum - WELLS & WELLINGTON 1985
Cyclodina oliveri — HICKSON et al. 2000
Cyclodina pachysomaticum — JEWELL 2008
Oligosoma oliveri — PATTERSON & BELL 2009
Oligosoma oliveri — CHAPPLE et al. 2009 
DistributionNew Zealand (islands off the east coast of Northland and in the Bay of Plenty, Korapuki Island, Aldermen Island)

Type locality: Poor Knights Island, Northern Islet (= Tawhiti Rahi) (35° 28’ S, 174° 44’ E). Map legend:
Type locality - Type locality.
 
Reproductionviviparous 
TypesHolotype: NMNZ R153 
CommentRare, threatened, or endangered species.

DIAGNOSIS: Cyclodina oliveri can be distinguished from all other C:Vclodina species through a combination of characters. Cyclodina oliveri has a prominent teardrop marking under the eye and >= 4 midbody scale rows, distinguishing it from C. aenea, C. aenea "Te Paki", and C. aenea "Poor Knights Islands". Cyclodina oliveri has an unbroken subocular scale row, distinguishing it from C. aenea "Poor Knights Islands". The genetic results indicate that C. oliveri is closely related to C. whitakeri; however, it can be distinguished through several morphological characters, predominantly coloration and scale counts. Cyc!odina oliveri lacks the yellow and orange coloration of many C. whitakeri specimens (Hardy 1977). Cyc!odina oliveri (TLlSVL: 1./1) has a shorter tail than C. whitakeri (TLlSVL: 1.2; Hardy 1977). Although there is overlap in midbody scale counts between C. oliveri (4-42) and C. ornata (28-7; Hardy 1977), the coloration differs between these two species. Colour pattern distinguishes C. oliveri from C. macgregori and C. alani, with C. alani having a more robust body form and greater maximum SVL.

Cyclodina oliveri and C. townsi are very difficult to distinguish morphologically. This is chiefly because the scale counts for C. oliveri on the Poor Knights overlap greatly with those for C. townsi, as noted by Hardy (1977). However, the Poor Knights skinks are so distinctive, in terms ofcoloration, body size and scalation, that it is not surprising that Hardy (1977) thought that there might be two subspecies within what is now classified as C. oliveri. The Poor Knights skinks are larger and more strikingly coloured than the C. oliveri from other islands, and their scale counts are significantly higher. Cyclodina townsi and C. oliveri can be distinguished only by a combination of colour pattern and temporal scale counts. 
Etymologynamed after the collector of the type, W.R.B. Oliver. 
References
  • Chapple, D.G.; Patterson, G.B.; Bell, T.; Daugherty, C.H. 2008. Taxonomic Revision of the New Zealand Copper Skink (Cyclodina aenea: Squamata: Scincidae) Species Complex, with Descriptions of Two New Species. Journal of Herpetology 42 (3): 437–452 - get paper here
  • Chapple, D.G.; Patterson, G.B.; Gleeson, D.M.; Daugherty, C.H. & Ritchie, P.A. 2008. Taxonomic revision of the marbled skink (Cyclodina oliveri, Reptilia: Scincidae) species complex, with a description of a new species. New Zealand Journal of Zoology 35: 129-146
  • Chapple, David G.; Peter A. Ritchie, Charles H. Daugherty 2009. Origin, diversification, and systematics of the New Zealand skink fauna (Reptilia: Scincidae). Molecular Phylogenetics and Evolution 52 (2): 470-487 - get paper here
  • Greer, A.E. 1974. The generic relationships of the scincid lizard genus Leiolopisma and its relatives. Australian Journal of Zoology 31: 1-67. - get paper here
  • Hardy, G. 1977. The New Zealand Scincidae: a taxonomic study. New Zealand Journal of Zoology 4: 221-325 - get paper here
  • HICKSON, Robert E.; KERRYN E. SLACK AND PETER LOCKHART 2000. Phylogeny recapitulates geography, or why New Zealand has so many species of skinks. Biological Journal of the Linnean Society 70: 415–433 - get paper here
  • Hitchmough, Rodney A.; Geoffrey B. Patterson, and David G. Chapple 2016. Putting a Name to Diversity: Taxonomy of the New Zealand Lizard Fauna in: Chapple, D.G. (ed). New Zealand Lizards. Springer, pp. 87-108 - get paper here
  • McCann, C. 1955. The lizards of New Zealand. Gekkonidae and Scincidae. Dominion Museum Bulletin (17): 1—127.
  • Patterson, G.B. & Bell, T.P. 2009. The Barrier skink Oligosoma judgei n. sp. (Reptilia: Scincidae) from the Darran and Takitimu Mountains, South Island, New Zealand. Zootaxa 2271: 43–56 - get paper here
  • Robb, J. 1975. Two new skinks of the genus Leiolopisma from New Zealand. Proc. K. ned. Akad. Wet. (biol. med. Sci.) 78 (5): 477-483
  • Robb,J. 1986. New Zealand Amphibians and Reptiles in Colour, Revised Edition. Collins, Auckland
 
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