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Oligosoma repens »

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Higher TaxaScincidae, Eugongylinae (Eugongylini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Eyres skink 
Oligosoma inconspicuum JEWELL 2008: 88
Oligosoma repens — HITCHMOUGH et al. 2016 
DistributionNew Zealand

Type locality: Mt Nicholas Road, Eyre Mountains, (45° 15’S, 168° 18’E), New Zealand.  
Reproductionviviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: NMNZ RE007279, adult male (coll. T. Bell, 2009). 
DiagnosisDiagnosis: Oligosoma repens can be distinguished from other related Oligosoma species through a combination of characters (Figure 4 in  CHAPPLE et al. 2011). Compared to O. maccanni, O. repens has a glossy appearance, with brown predomi- nating whereas O. maccanni has a greyer ground colour. Oligosoma maccanni has a pale grey ventral colour rather than the bright yellow ventral colour in O. repens. The ear opening in O. maccanni often has large projecting scales on the interior margin, whereas these are often minimal or lacking altogether in O. repens. Oligosoma maccanni has four supraocular scales compared with three in O. repens. Oligosoma polychroma from nearby areas have very similar colour patterns to O. repens, but can be distinguished by a pale dorsal stripe on the outside of the forelimbs, and a greyish-brown ventral colouration. The ear opening in O. polychroma often has prominent projecting scales on the interior margin. There are statistical differences between O. repens and O. toka (SVL/HL, SVL/HLL, ventral scales), O. burganae (AG/SF, SE/EF, HL/HW, SVL/HL), and O. notosaurus (SVL/HL, ventral scales) (Figure 4). All O. repens have three supraoculars whereas all O. inconspicuum and O. notosaurus have four. The number of subdigital lamellae in O. tekakahu (16) is fewer than O. repens (19–23). The dorsal surface of the head is usually unmarked in O. repens, in contrast with O. toka and O. notosaurus in particular. The species is more gracile than the other members of the species complex [from  CHAPPLE et al. 2011]. 
EtymologyFrom ‘repens’ (Latin, neuter) = unexpected. Refers to the unexpected discovery of a genetically divergent new species in the Eyre Mountains that occurs sympatrically with O. inconspicuum (sensu stricto). 
  • Bythell, Jesse. 2012. Range extension of the Eyre Mountains skink (Oligosoma repens) into Fiordland National Park. BioGecko (1): 39 - get paper here
  • CHAPPLE, DAVID G., TRENT P. BELL, STEPHANIE N.J. CHAPPLE, KIMBERLY A. MILLER, CHARLES H. DAUGHERTY & GEOFF B. PATTERSON 2011. Phylogeography and taxonomic revision of the New Zealand cryptic skink (Oligosoma inconspicuum; Reptilia: Scincidae) species complex. Zootaxa 2782: 1–33
  • 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
  • Jewell, Tony 2008. A Photographic Guide to Reptiles and Amphibians of New Zealand [with corrections and comments in Chapple & Hitchmough 2009]. New Holland Publishers (NZ) Ltd,Auckland, 143 pp.
  • JEWELL, TONY 2015. Insight into the cryptic skink (Oligosoma aff. inconspicuum) species-complex in North Otago. BioGecko (3): 35-42
  • KNOX, C., PATTERSON, G. B., & CHAPPLE, D. G. 2023. Oligosoma aureocola sp. nov.(Reptilia: Scincidae) from the northern Southland high country of Aotearoa/New Zealand. Zootaxa 5285 (2): 271-292 - get paper here
  • van Winkel, D., Baling, M. & Hitchmough, R. 2018. Reptiles and Amphibians of New Zealand: A field guide. Auckland University Press, Auckland, 376 pp.
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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