Oligosoma taumakae CHAPPLE & PATTERSON, 2007
Can you confirm these amateur observations of Oligosoma taumakae?
|Higher Taxa||Scincidae, Eugongylinae, Scincoidea, Sauria, Squamata (lizards)|
|Common Names||Open Bay Islands skink|
|Synonym||Oligosoma taumakae CHAPPLE & PATTERSON 2007|
Oligosoma taumakae — HITCHMOUGH et al. 2016
|Distribution||New Zealand (Open Bay Islands)|
Type locality: Taumaka Island, Open Bay Islands (43°52′S, 168°53′E).
|Reproduction||Oligosoma taumakae is believed to be viviparous.|
|Types||Holotype: NMNZ RE5237 (National Museum of New Zealand, Wellington), collected by P. A. Van Klink in December 1998).|
|Comment||Diagnosis: Oligosoma taumakae is recognised using both the phylogenetic (Fig. 4) and genotypic cluster species concepts (see Coyne & Orr 2004). Since O. taumakae is allopatric from its congeners, the biological species concept is not applicable. The new species can be distinguished from its closest relatives (O. acrinasum, O. infrapunctatum, O. otagense, O. waimatense; see “Mitochondrial DNA analyses”) on the basis of several characteristics. Its coloration differs from O. acrinasum, O. otagense and O. waimatense, which do not have brown coloration. Although coloration is very similar in both O. taumakae and O. infrapunctatum, a lower pale stripe is usually more distinct in O. infrapunctatum, and there is less flecking on the brown dorsolateral stripe compared to O. taumakae. Oligosoma taumakae is superficially similar in appearance to some specimens of O. infrapunctatum. However, foot size clearly distinguishes these two species, with FTL approximately 25% greater in O. taumakae compared to O. infrapunctatum of similar SVL (SVL/FTL: O. taumakae 8.27 [n = 2], O. infrapunctatum SVL/FTL 10.24 [n = 10]). There is also no overlap in supraciliary count, with 5 in O. taumakae compared with 6–9 in O. infrapunctatum (Hardy 1977; this study). Another feature of O. taumakae is an enlargement of several upper ciliary scales to form a flap overhanging the eye, which is more pronounced than in O. infrapunctatum. Several body ratios also appear to differ between O. taumakae and its closest relatives (see Table 2), although the small number of available O. taumakae specimens precludes statistical analyses. The midbody scale count of O. taumakae (32–34) has no overlap with O. acrinasum (37–38), O. waimatense (50–68), or O. otagense (46–72) (Table 2). Since the geographic ranges of O. acrinasum, O. waimatense and O. otagense do not overlap with O. taumakae (Fig. 2), and O. taumakae is the only skink species present on the Open Bay Islands, identification of this new species should prove relatively straightforward.|
|Etymology||From Taumaka Island, the type locality.|
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