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Hypsilurus hikidanus MANTHEY & DENZER, 2006

IUCN Red List - Hypsilurus hikidanus - Least Concern, LC

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Higher TaxaAgamidae (Amphibolurinae), Sauria, Iguania, Squamata (lizards) 
Subspecies 
Common Names 
SynonymHypsilurus hikidanus MANTHEY & DENZER 2006
Gonocephalus godeffroyi — URBAN 1977: 76 (not Lophura (Hypsilurus) Godeffroyi PETERS 1867)
Hypsilurus hikidanus — KRAUS & MYERS 2012 
DistributionIndonesia (Papua)

Type locality: Enarotali, Wisselmeren (3°55’S, 136°21’E)  
Reproductionoviparous 
TypesHolotype: RMNH 28905, adult male 
DiagnosisDiagnosis.– Medium sized, long–tailed species (SVL males up to 158, females up to 120 mm [Urban, 1977 as godeffroyi]); TL/SVL > 2.9) with homogeneous dorsal scalation and a discontinuous vertebral crest. With or without weakly enlarged scales below the tympanum; a row of enlarged submaxillaries present; anterior edge of the gular pouch with enlarged scales.
H. hikidanus differs from boydii, spinipes and dilophus by a homogeneous dorsal scalation (vs. heterogeneous) and a longer tail TL/SVL > 2.9 (vs. < 2.3); all other species with the exception of schultzewestrumi by significantly enlarged scales along the anterior edge of the gular pouch and from schultzewestrumi by smaller plates at the sides of the head (if present usually only near the angle of the mouth), largest extension < Ø tympanum (vs. present, largest extension > Ø tympanum); additionally from godeffroyi by a broader head HW/SVL > 0.131 (vs. < 0.128), a higher nuchal crest > Ø tympanum (vs. < 1/2 Ø tympanum), as well as not having the base of the tail raised (vs. raised); auritus, geelvinkianus
and nigrigularis by the presence of a row of enlarged submaxillaries (vs. absent) as well as a rounded base of gular pouch approximately near the clavicular region (vs. acuminate on chest); modestus the presence of a dorsal crest (vs. absent); macrolepis and longii by a lower number of scales between enlarged submaxillaries and infralabials, 3 (vs. 4–5) as well as smooth scales on the anterior part of the gular pouch (vs. keeled); schoedei by shorter legs HBL/SVL < 0.45 (vs. > 0.46); binotatus by a discontinuous vertebral crest on the nape (vs. continuous); bruijnii and papuensis by a larger tympanum, T/E > 0.73 (vs. < 0.73). 
Comment 
EtymologyNamed after Tsutomu Hikida, Japanese herpetologist. 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Manthey, U. & Denzer, W. 2006. A revision of the Melanesian-Australian angle head lizards of the genus Hypsilurus (Sauria: Agamidae: Amphibolurinae), with description of four new species and one new subspecies. Hamadryad 30 (1-2): 1 – 40
  • MANTHEY, U. & W. DENZER 2016. Melanesian anglehead lizards of the genus Hypsilurus Peters, 1867 – Part 1: Species from New Guinea Sauria 38 (3): 11 - 36 - get paper here
 
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