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Oligosoma prasinum MELZER, BELL & PATTERSON, 2017

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Higher TaxaScincidae, Eugongylinae (Eugongylini), Scincoidea, Sauria, Squamata (lizards)
Subspecies 
Common NamesE: Mackenzie skink 
SynonymOligosoma prasinum MELZER, BELL & PATTERSON 2017
Oligosoma aff. lineoocellatum “Mackenzie Basin” — HITCHMOUGH et al. 2007
Oligosoma aff. lineoocellatum “Mackenzie Basin” — HITCHMOUGH et al. 2010
Oligosoma aff. lineoocellatum “Mackenzie Basin” — HITCHMOUGH et al. 2013
Oligosoma aff. lineoocellatum “Mackenzie Basin” — HITCHMOUGH et al. 2016b 
DistributionNew Zealand (Tekapo)

Type locality: Tekapo, Mt Hay (43° 59’S, 170° 28’E),  
Reproductionviviparous (not imputed, fide Zimin et al. 2022) 
TypesHolotype: NMNZ RE005462, male (coll. G. Patterson, 01 Nov 1990); Paratypes (9 specimens). Tekapo, Mt Hay (43° 00’S, 170° 34’E), 2 specimens (NMNZ RE005447, OR; NMNZ RE005448, organs removed) (coll. G. Patterson, 30 Nov 1984); Tekapo (44° 01’S, 170° 29’E), 3 specimens (NMNZ RE005464, male; NMNZ RE005465, OR; NMNZ RE005466, OR) (coll. G. Patterson, 01 Jan 1990); Tekapo (-44° 00’S, 170° 48’E), 4 specimens (NMNZ RE006222, OR; NMNZ RE006223, organs removed; NMNZ
RE006224, organs removed; NMNZ RE006225, organs removed) (coll. C. Daugherty, 26 Nov 1985). 
DiagnosisDiagnosis: Oligosoma prasinum can be distinguished from other species in the O. lineoocellatum species complex by a combination of characters. The subdigital lamellae count is usually above 24, compared with O. kokowai sp. nov. and O.lineoocellatum where it is usually below 24. There are significant differences between O. prasinum sp. nov. and O. kokowai sp. nov. and O. elium sp. nov. (midbody scales; Figure 6b). The lower ciliary count is usually below 9, whereas in O. lineoocellatum it is usually 9 or above. In O. elium sp. nov. the UC count usually higher than 6, whereas in O. prasinum sp. nov. it can be lower than 6. This species always has more than 1 nuchal pairs, compared with O. kokowai sp. nov. that always has 1 pair. The pale dorsolateral stripe is usually not
as pronounced as in the other species. Unlike Hardy’s (1977) observation, we did not find the VS useful in differentiating the species, as there was a big range in counts, e.g. 76 to 102 in O. lineoocellatum. Oligosoma prasinum sp. nov. seems to be less heavily built than the other species, in particular O. elium sp. nov. (Figures 2, 3, 4, 5). 
Comment 
EtymologyThe specific name means “green” in Greek. It has been latinized. 
References
  • Hitchmough, R. A., Hoare, J.M., Jamieson, H., Newman, D., Tocher, M.D. and Anderson, P. J. 2010. Conservation status of New Zealand reptiles, 2009. New Zealand Journal of Zoology 37 (3): 203-224 - get paper here
  • Hitchmough, R., Anderson, P., Barr, B., Monks, J., Lettink, M., Reardon, J., Tocher, M. & Whitaker, T. 2013. Conservation status of New Zealand reptiles, 2012. In: New Zealand Threat Classification Series 2. Department of Conservation, Wellington, pp. 1–16
  • Hitchmough, R., Barr, B., Lettink, M., Monks, J., Reardon, J., Tocher, M., van Winkel, D. & Rolfe, J. 2016. Conservation status of New Zealand reptiles, 2015. In: New Zealand Threat Classification Series 17. Department of Conservation, Wellington, pp. 1–22
  • Hitchmough, R., Bull, L. & Cromarty, P. 2007. New Zealand Threat Classification System lists—2005. Department of Conservation, Wellington, 194 pp
  • Winkel, D. van, 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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