Oligosoma ornatum (GRAY, 1843)
Can you confirm these amateur observations of Oligosoma ornatum?
|Higher Taxa||Scincidae, Eugongylinae, Scincoidea, Sauria, Squamata (lizards)|
|Common Names||Gray's Ornate Skink|
|Synonym||Tiliqua ornata GRAY 1843: 202|
Hinulia ornata — Gray 1845: 77
Euprepes ornatus - STEINDACHNER 1869: 49
Lygosoma ornatum - BOULENGER 1887: 317
Lygosoma (Sphenomorphus) ornatum — SMITH 1937: 220
Sphenomorphus ornatus - MITTLEMAN 1952
Leiolopisma ornata - MCCANN 1955 (part)
Sphenomorphus pseudornatus MCCANN 1955
Leiolopisma ornatum — GREER 1974: 17
Leiolopisma pseudornatum - GREER 1974: 17
Cyclodina ornata - HARDY 1977: 261
Cyclodina ornata — HICKSON et al. 2000
Oligosoma ornata — CHAPPLE et al. 2009
|Distribution||New Zealand (North Island)|
Type locality: Manakau, Horowhenua (homotype locality)
|Types||Neotype: NMNZ RE.002457 (formerly NMNZ R.1815 and EDS.912), designated by Patterson et al. 2013.|
Homotype: NMNZ R1815 (designated by HARDY 1977)
|Comment||Max. snout-vent-length: 80 mm.|
Synonymy: This species has been confused with O. aeneum and therefore the name ornatum (and variations have been used for aeneum as well.
Diagnosis: Oligosoma ornatum can be distinguished from other Oligosoma species through a combination of characters. The orange iris clearly visible in living animals separates the species from all other Oligosoma except O. aeneum, O. levidensum (Chapple et al, 2008), O. hardyi (Chapple et al, 2008), O. townsi (Chapple et al, 2008), O. oliveri (McCann, 1955), O. macgregori (Robb, 1975), O. whitakeri (Hardy, 1977), O. striatum (Buller, 1871), O. homalonotum (Boulenger, 1906), and O. roimata sp. nov.. The unbroken subocular scale row separates O. ornatum from O. striatum, O. homalonotum and O. hardyi. Oligosoma ornatum has a prominent teardrop marking under the eye, and a moderately large ear opening, which separates it from O. aeneum, O. levidensum and O. hardyi which lack this marking and have small ear openings. Oligosoma townsi midbody scale count of ≥38 does not overlap with O. ornatum.
The maximum SVL is much less than that of O. oliveri (105.6 mm) and the AG/SF ratios are quite different (Chapple et al. 2008a). There is minimal overlap between O. ornatum and O. whitakeri in midbody and ventral scale counts with O. whitakeri having a higher range for both indices (Hardy 1977). O. ornatum lacks the yellow and orange colouration of many O. whitakeri specimens (Hardy 1977). O. whitakeri generally has dark blotches on the ventral surface, whereas it is often lightly speckled in O. ornatum. Oligosoma whitakeri has a longer tail (TL/ SVL: 1.32; Hardy 1977) compared to O. ornatum (TL/SVL: 1.14). Colour pattern distinguishes O. ornatum from O. macgregori and there is no overlap in midbody counts between these two species. The ventral colouration of O. ornatum which is usually flushed with orange, red, pink or yellow is different from the white venter of O. roimata sp. nov. [PATTERSON et al. 2013]
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