Oligosoma aff. longipes "southern"

Roamatimati skink

Oligosoma aff. longipes "southern"

Roamatimati skink (Canterbury). © Carey Knox
Image attribution
Roamatimati skink (Canterbury). © Carey Knox
Herpetofaunal category
NZ Skinks
Species complex
Conservation Status
At Risk - Declining
Previous scientific names
Oligosoma longipes
Common names
Roamatimati skink

Length: SVL up to 75mm, with the tail being much longer than the body length

Weight: unknown

Description

An active skink species from the rock dominated alpine habitats of inland Canterbury, it is often characterised by its relatively long toes and tail. It is extremely similar in appearance to the closely related Northern long-toed skink (Oligosoma longipes).

The dorsal surfaces of this species are characterised by a grey to brownish-grey colouration, with scattered pale grey, and brown blotching. An indistinct or incomplete brown mid-dorsal stripe may be present. The sides of the animal are comprised of a thin grey dorsolateral stripe running from the ear to the base of the tail, bordered underneath by a notched brown band, which also breaks up at the base of the tail. The lower surfaces of the animal are often a uniform grey but may have dark speckling or flecking in some individuals, particularly on the chin. 

Roamatimati skinks are similar in appearance to McCann's skinks (Oligosoma maccanni) and White-bellied skinks (Oligosoma hoparatea), which occur in the same habitat. They can be distinguished from the former by their much longer toes and tail, in combination with the lack of a clear mid-dorsal stripe. Whilst the White-bellied skink by comparison is much larger, and has notched (vs smooth-edged) dorsolateral stripes. 
Geographically isolated from the closely related and visually similar Northern long-toed skink (Oligosoma longipes) and Kahurangi skink (Oligosoma kahurangi).

Life expectancy

Unknown

Distribution

Roamatimati skinks are known from several scattered populations from inland Canterbury through to the Mackenzie Basin.

Ecology and habitat

Roamatimati skinks are diurnal and strongly heliothermic, emerging from their rocky retreats to actively hunt when conditions are suitable. They are a saxicolous species spending the majority of their lives in and amongst the rocky habitats in alpine environments (screes, gravel or boulder talus slopes, dry streambeds, and rock piles amongst low growing vegetation). 

Social structure

Unknown

Breeding biology

Unknown

Diet

Roamatimati skinks are omnivorous, feeding on all manner of small invertebrates as well as the berries / fruit from native plants.

Disease

Unknown.

Conservation strategy

Roamatimati skinks are currently regarded as 'At Risk - Declining'. This species is not currently being managed. 

Interesting notes

Roamatimati skinks are close relatives of the northern long-toed skink (Oligosoma longipes), White-bellied skink (Oligosoma hoparatea) and Kahurangi skink (Oligosoma kahurangi). They occur sympatrically (in the same habitat) with the White-bellied skink (Oligosoma hoparatea), which is also its closest relative.

References

Chapple, D. G., Ritchie, P. A. & Daugherty, C. H. (2009). Origin, diversification, and systematics of the New Zealand skink fauna (Reptilia: Scincidae). Molecular Phylogenetics and Evolution, 52(2), 470-487.

Hitchmough, R.A., Barr, B., Lettink, M., Monks, J., Reardon, J., Tocher, M., van Winkel, D., Rolfe, J. (2016). Conservation status of New Zealand reptiles, 2015; New Zealand threat classification series 17. Wellington: New Zealand Department of Conservation.

Jewell, T. (2011). A photographic guide to reptiles and amphibians of New Zealand. Auckland: New Holland Publishing.

van Winkel, D., Baling, M. & Hitchmough, R. (2018). Reptiles and Amphibians of New Zealand: A field guide. Auckland: Auckland University Press, 376 pp.