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Hypsilurus tenuicephalus MANTHEY & DENZER, 2006

IUCN Red List - Hypsilurus tenuicephalus - Data Deficient, DD
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Higher TaxaAgamidae (Amphibolurinae), Sauria, Iguania, Squamata (lizards)
Subspecies 
Common Names 
SynonymHypsilurus tenuicephalus MANTHEY & DENZER 2006: 29 
DistributionIndonesia (highlands of Western Papua)

Type locality: Reportedly from the highlands of Western Papua, Province of Indonesia.  
Reproductionoviparous 
TypesHolotype: MTD (= MTKD) D 30608, adult male 
DiagnosisDiagnosis: Medium–sized, slender, narrow headed and long–tailed species with homogeneous dorsal scalation and a discontinuous vertebral crest. Weakly enlarged scales below the tympanum; a short row of enlarged submaxillaries present; anterior edge of the gular pouch without enlarged scales. Hypsilurus tenuicephalus differs from all other species by a slender head, HW/SVL < 0.115 (vs. > 0.124); additionally from H. auritus, geelvinkianus and nigrigularis by a rounded base of gular pouch approximately near the clavicular region (vs. acuminate base on the chest) and a lower number of enlarged scales below the tympanum (vs. absent or numerous and forming an oval ring), additionally from H. auritus and nigrigularis by keeled scales on the gular pouch (vs. smooth to convex); H. modestus by the presence of a dorsal crest (vs. absent); H. binotatus by an indented vertebral crest (vs. continuous), less clearly enlarged scales below the tympanum, largest extension < 1/2 Ø tympanum (vs. > 1/2 Ø tympanum), a longer tail, TL/SVL > 3.7 (vs. < 3.6) and a larger tympanum, T/E > 1.15 (vs. ≤ 1.0); H. bruijnii, godeffroyi, schoedei, schultzewestrumi and hikidanus by keeled scales on the gular pouch (vs. smooth); H. papuensis, macrolepis and longii by a shortened row of enlarged submaxillaries running form the mental region, approximately to middle of the snout (vs. at least to the angle of the mouth); H. boydii, spinipes and dilophus by a homogeneous dorsal scalation (vs. heterogeneous) and a longer tail TL/SVL > 3.7 (vs. < 2.3) (Manthey & Denzer 2006: 29). 
CommentAbundance: only known from the type specimen (Meiri et al. 2017). 
EtymologyNamed after its elongated, slender head we name this species tenuicephalus (lat. tenuis – slim, slender; gr. cephal – head). 
References
  • 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 - get paper here
  • 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
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
 
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