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Emoia nigromarginata (ROUX, 1913)

IUCN Red List - Emoia nigromarginata - Least Concern, LC

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Higher TaxaScincidae, Eugongylinae, Scincoidea, Sauria, Squamata (lizards) 
Subspecies 
Common NamesBlack-bordered Emo Skink 
SynonymLygosoma (Emoa) nigromarginatum ROUX 1913
Lygosoma (Emoa) speiseri ROUX 1913
Lygosoma speiseri — BAKER 1928
Emoia speiseri — SMITH 1937: 226
Emoia nigromarginata — GREER 1974: 20
Emoia speiseri - GREER 1974: 20
Emoia speiseri - MEDWAY & MARSHALL 1975
Emoia nigromarginata — ADLER, AUSTIN & DUDLEY 1995
Emoia nigromarginata — ZUG et al. 2011 
DistributionVanuatu (Santo, Pentecost, Malakula, Ambrym, Epi, Efate, and Anatom), New Hebrides (fide SMITH 1937, Ineich 2011)

Type locality: Pentecote, Vanuatu Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
 
Reproductionoviparous. 
TypesHolotype: NMBA = NHMB
Lectotype: NHMB [speiseri] 
CommentTwelve specimens of E. nigromarginata from different localities in Vanuatu studied by Medway show 28-34 midbody scale rows, 38-48 subdigital lamellae under the fourth toe, and a snout-vent length of 60-2 mm. E. aneityumensis is only known from Anatom and specimens are conserved at BMNH and FMNH.

The coloration of the holotype (after 18 months preservation in alcohol), is dark brown on the back, with a discontinuous and irregular row of black spots and punctuations extending in the shape of a discontinuous dorso-lateral line from ear to tail base extending above legs and feet. Flanks are brownish, crossed and spotted by intrusions of the whit- ish ventral coloration. In three live juveniles the back was grey-brown or olive-brown, marked by a broken row of punctuations or black spots, mixed with Nile water flecks extending from the ear to the base of the tail. Flanks are olive-brown, crossed and spotted by the dirty white ventral colouration. The tail is the same brown as the dorsal colouration but regenerated tails are lighter. Medway supposed, according to Cheesman’s description, that adults have a general grey blue coloration [Ineich 2011].

Habitat: forest species that never frequents open habitats 
References
  • Adler,G.H.; Austin,C.C. & Dudley,R. 1995. Dispersal and speciation of skinks among archipelagos in the tropical Pacific Ocean. Evolutionary Ecology 9: 529-541 - get paper here
  • Baker, J.R. 1928. The non-marine vertebrate fauna of the new Hebrides. Ann. Mag. Nat. Hist. (10) 2: 294-302
  • Brown W C 1991. Lizards of the genus Emoia (Scincidae) with observations on their evolution and biogeography. MEMOIRS OF THE CALIFORNIA ACADEMY OF SCIENCES (No. 15) 1991: i-vi, 1-94 - get paper here
  • Greer, A.E. 1974. The generic relationships of the scincid lizard genus Leiolopisma and its relatives. Australian Journal of Zoology 31: 1-67. - get paper here
  • Ineich, I. 2011. Amphibians and reptiles. In: Bouchet P., Le Guyader H. & PascaL O. (eds), The Natural History of Santo. pp. 187-236. MNhN, Paris; Ird, Marseille; PNI, Paris. 572 pp. (Patrimoines naturels; 70).
  • Kramer, Eugen 1979. Typenkatalog der Echsen im Naturhistorischen Museum Basel (BM), Stand 1978. Revue Suisse de Zoologie 86 (1): 159-166 - get paper here
  • Lord Medway, & Marshall, A.G. 1975. Terrestrial vertebrates of the New Hebrides: origin and distribution. Roy. Soc. of London, Philosophical Trans. (Ser. B) 272: 423-465.
  • Roux,J. 1913. Les reptiles de de la Nouvelle-Calédonie et des îles Loyalty. In: Nova Caledonia, Recherches scientifiques en Nouvelle Calédonie et aux Iles Loyalty. Zoologie. (vol. 1, L. 2). Sarasin, F. & Roux,J. (eds.). C.W. Kreidel’s Verlag, Wiesbaden, pp. 79-160 - get paper here
  • Smith,M.A. 1937. A review of the genus Lygosoma (Scincidae: Reptilia) and its allies. Records of the Indian Museum 39 (3): 213-234
  • Zug, G.R. 2012. A new species of treeskink (Squamata: Scincidae: Emoia samoensis species group) from Rotuma, south-central Pacific. Proceedings of the Biological Society of Washington 125(1):74-84 - get paper here
  • Zug, G.R. & I. Ineich 1995. A new skink (Emoia: Lacertilia: Reptilia) from the forest of Fiji. Proc. Biol. Soc. Washington 108 (3): 395-400. - get paper here
  • ZUG, GEORGE R.; ALISON M. HAMILTON & CHRISTOPHER C. AUSTIN 2011. A new Emoia samoensis group lizard (Squamata: Scincidae) from the Cook Islands, South-central Pacific. Zootaxa 2765: 47–57 - get paper here
 
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