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Acanthosaura titiwangsaensis WOOD, GRISMER, GRISMER, AHMAD, ONN & BAUER, 2009

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Higher TaxaAgamidae (Draconinae), Sauria, Iguania, Squamata (lizards)
Subspecies 
Common NamesE: Malayan Mountain Horned Agamid, Titiwangsa Horned Tree Lizard 
SynonymAcanthosaura titiwangsaensis WOOD, GRISMER, GRISMER, AHMAD, ONN & BAUER 2009
Acanthosaura titiwangsaensis — GRISMER & QUAH 2019 
DistributionW Malaysia (Pahang)

Type locality: Bishop’s Trail, Fraser’s Hill, Pahang, Peninsular Malaysia (3º43.230'N; 101º44.887'E), 1,112 m elevation.  
Reproduction 
TypesHolotype: ZRC 2.6805, adult male, collected on 28 June 2008 by Jesse L. Grismer, L. Lee Grismer, Perry L. Wood Jr., at 2330 h.; Paratypes: ZFMK and ZRC 
DiagnosisDiagnosis: Maximum SVL of adult males 118.4 mm, maximum SVL of females 112.7 mm; head triangular, snout short (SL/HL 46–52%); eye moderate (EYE/HL 28–30%); no enlarged elliptical scales below orbit; scales on the canthus rostralis-supraorbital ridge 14 or 15; large rectangular rostral scale; a short cylindrical spine above posterior margin of eye surrounded by a rosette of four smaller keeled scales at base; spine on occiput between tympanum and nuchal crest present; tympanum naked, oblong, taller than wide; dewlap present in males and females; body triangular in cross section; scales of flanks intermixed with randomly arranged clusters of larger keeled scales; nuchal crest present; 11–13 scales in nape diastema; vertebral crest composed of enlarged, pointed scales beginning at shoulder region and tapering to a series of enlarged keeled scales on anterior portion of tail; crest scales largest at base of nape; tail 140–150% of SVL; black collar present; posterior 2/3 of tail black to dark brown; greenish-yellow to light orange spots encircled by gray on body, gular region orangish yellow; no yellow medial stripe on dewlap. 
Comment 
EtymologyThis specific epithet titwangsaensis is in reference to the mountain range, Banjaran Titiwangsa, to which we believe this species is likely to be restricted. 
References
  • GRISMER, L. LEE; & EVAN S. H. QUAH 2019. An updated and annotated checklist of the lizards of Peninsular Malaysia, Singapore, and their adjacent archipelagos. Zootaxa 4545 (2): 230–248 - get paper here
  • Grismer, L.L. 2011. Lizards of Peninsular Malaysia, Singapore and their adjacent archipelagos. Edition Chimaira, Frankfurt, 728 pp. [review in Herp. Rev. 43: 155] - get paper here
  • Liu S, Rao D 2019. A new species of the genus Acanthosaura from Yunnan, China (Squamata, Agamidae). ZooKeys 888: 105-132 - get paper here
  • NORHAYATI, A.; FARAH, A.D.; CHAN, K.O.; DAICUS, B. and MUIN, M.A. 2011. AN UPDATE OF HERPETOFAUNAL RECORDS FROM BUKIT FRASER, PAHANG, PENINSULAR MALAYSIA. Malays. Appl. Biol. (2011) 40(2): 9–17 - get paper here
  • PAUWELS, OLIVIER S. G.; MONTRI SUMONTHA, KIRATI KUNYA, AWAT NITIKUL, PHAMON SAMPHANTHAMIT, PERRY L. WOOD, JR. & LEE L. GRISMER 2015. Acanthosaura phuketensis (Squamata: Agamidae), a new long-horned tree agamid from southwestern Thailand. Zootaxa 4020 (3): 473–494 - get paper here
  • WOOD JR., PERRY L.;JESSE L. GRISMER, L. LEE GRISMER, NORHAYATI AHMAD, & CHAN KIN ONN & AARON M. BAUER 2009. Two new montane species of Acanthosaura Gray, 1831 (Squamata: Agamidae) from Peninsular Malaysia. Zootaxa 2012: 28-46 - get paper here
  • Wood, P.L.; Grismer, L.L.; Grismer, J.L.; Neang, T.; Chav, T. & holden, J. 2010. A new cryptic species of Acanthosaura Gray, 1831 (Squamata: Agamidae) from Thailand and Cambodia. Zootaxa 2488: 22–38 - get paper here
 
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