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Emoia caeruleocauda (DE VIS, 1892)

IUCN Red List - Emoia caeruleocauda - Least Concern, LC

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Higher TaxaScincidae, Eugongylinae (Eugongylini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Pacific Bluetail Skink 
SynonymMocoa caeruleocauda DE VIS 1892
Scincus celestinus VALENCIENNES (?, nomen nudum fide OHLER et al. 2021)
Lygosoma cyanurum werneri VOGT 1912
Lygosoma werneri triviale SCHÜZ 1929
Emoia triviale — SCHMIDT 1932: 186
Lygosoma (Emoa) werneri — ANGEL 1935: 55
Emoia werneri — BURT & BURT 1932
Emoia werneri — HEDIGER 1934
Emoia werneri — PARKER 1936: 86
Emoia werneri — SMITH 1937: 227
Emoia werneri — BRONGERSMA 1948: 491
Emoia werneri — DRYDEN & TAYLOR 1969
Emoia caeruleocauda — GREER 1974: 20
Emoia werneri — GREER 1974
Emoia werneri — MEDWAY & MARSHALL 1975
Emoia caeruleocauda — BROWN & ALCALA 1980: 72
Emoia caeruleocauda — MYS 1988: 132
Emoia caeruleocauda — ADLER, AUSTIN & DUDLEY 1995
Emoia caeruleocauda — WHITING et al. 2003
Emoia caeruleocauda — KAISER et al. 2020 
DistributionWidespread from S Indonesia through New Guinea and the
Solomon Islands northward into the Marianas, Carolines, and Marshall Islands, New Hebrides, Micronesia (e.g. Mortlock Islands, Chuuk), Northern Mariana Islands (Saipan) (Hileman et al. 2020),
Fiji Islands (Viti Levu, Taveuni), Solomons Vanuatu, Banks and Torres groups, Santo, Malo, Aore, Pentecost (formerly sometimes called Raga), Malakula, Ambrym, Tongoa, Efate, Erromango, Aniwa, Tanna, Futuna, and Anatom; Loyalty Islands, Papua New Guinea, Philippines,
Indonesia (Moluccas, Celebes, Sulawesi, Morotai, Irian Jaya), Malaysia (Borneo: Sabah), Palau,
Admirality Islands, Hiu Island, Uman District Islands
Guam (G. Rodda, pers. comm., 13 March 2016).

Type locality: Sudest Island (formerly Tagula Island) in the Louisiade Archipelago, Papua New Guinea. Type locality for the neotype (Brown, 1991): Rambuso, Sudest Island, Louisiade Archipelago, Papua New Guinea.  
TypesNeotype: AMNH 76761 (designated by BROWN 1991); original syntypes: QM (lost) 
DiagnosisE. caeruleocauda occurs as two colour morphs over most of its distribution: one emerald green tailed form and one completely dark brown form sometimes with one to three more or less visible golden dorsal back stripes. That later morph can easily be confused with Emoia cyanura. They differ however by toe lamellae and other scale counts. One practical way to distinguish between them in the field is the occurrence of a dark blackish axilla spot in E. caeruleocauda but absent in E. cyanura and other Vanuatu Emoia species [Ineich 2011]. 
CommentDistribution: Not listed by BAUER 1999.

Synonymy: partly after Zug 1997. The E. caeruleocauda shown in ter Borg (2005) is actually Cryptoblepharus renschi (ter Borg 2007). “Scincus celestinus Valenc. Mus. Par. Guérin, Icon. R. A. t. 15, f. 2” is mentioned in Gray 1845: 79 as a synonym of Keneuxia smaragdina, but without publication date.
EtymologyNamed after its blue (”caeruleo”) tail (”cauda”). 
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