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Gonocephalus beyschlagi BOETTGER, 1892

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Higher TaxaAgamidae (Draconinae), Sauria, Iguania, Squamata (lizards)
Common NamesE: Sumatra Forest Dragon 
SynonymGonyocephalus beyschlagi BOETTGER 1892: 104
Gonyocephalus beyschlagi — WERNER 1900: 484
Gonyocephalus beyschlagi — DE ROOIJ 1915: 105
Gonocephalus liogaster — VORIS 1977 (fide MANTHEY & GROSSMANN 1997)
Gonocephalus beyschlagi — MANTHEY & GROSSMANN 1997: 178
Gonocephalus beyschlagi — TEYNIÉ et al. 2010 
DistributionIndonesia (N Sumatra)

Type locality: Langkat in Deli, NE Sumatra.  
TypesHolotype: SMF 9760 (formerly 4287a) 
DiagnosisDescription: Snout much longer than the diameter of the orbit ; canthus
rostralis sharp, projecting; supraciliary border sharp, normal; tympanum distinct, half the diameter of the eye. Head-scales large, unequal, slightly rugose, keeled ; a series of enlarged ones on the forehead, Y-shaped; ten to twelve upper and ten to eleven lower labials. Gular sac moderate, without serrated anterior edge, covered with obtusely keeled or pointed scales; throat with enlarged tubercles scattered between the small scales. Body compressed; nuchal and dorsal crests continuous, almost equal, slightly notched on the nape; it has about half the height of the body, continued at the base of the tail and formed of sharply pointed united lobes, covered at the base with two or three rows of scales. Dorsal scales minute, conical, pointing upwards; a regular longitudinal series of enlarged tubercles on each side; ventral scales rather large, smooth. Tail strongly compressed, with a high crest on its base, which ends at about 20 mm; upper caudal scales feebly keeled, lower larger and the two inferior series strongly keeled; its length about two times and a half that of head and body. Limbs with equal, keeled scales ; the hind limb reaches beyond the tip of the snout; fourth finger a little longer than third (de Rooij 1915: 105).

Coloration: Greenish-grey above, with a longitudinal yellowish-white streak on the nape above the tympanum, an oblique light streak near the axilla; row of tubercles along the back whitish; flanks with a dark network, including large yellow spots. Limbs with narrow light bands and light keels of the scales; tail with eleven light and dark annuli. Lower parts yellowish; throat somewhat darker (de Rooij 1915: 105).

Size: Length of head and body 116 mm.; tail 277 mm. (Not seen by my) (de Rooij 1915: 105). 
EtymologyNamed after Fritz Beyschlag who collected in Sumatra. 
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Boettger, O. 1892. Katalog der Batrachier-Sammlung im Museum der Senckenbergischen Naturforschenden Gesellschaft in Frankfurt/M. Frankfurt/M (Gebr. Knauer), 73 S.
  • Boettger, O. 1892. Listen von Kriechtieren und Lurchen aus dem tropischen Asien und aus Papuasien. Ber. Tät. Offenb. Ver. Nat., Offenbach, 29 - 32: 65 - 164 - get paper here
  • Boettger, Oskar 1893. Katalog der Reptilien-Sammlung im Museum der Senckenbergischen Naturforschenden Gesellschaft in Frankfurt am Main. I. Teil (Rhynchocephalen, Schildkröten, Krokodile, Eidechsen, Chamäleons). [type catalogue] Gebrüder Knauer, Frankfurt a. M., x + 140 pp. - get paper here
  • de Rooij, N. de 1915. The Reptiles of the Indo-Australian Archipelago. I. Lacertilia, Chelonia, Emydosauria. Leiden (E. J. Brill), xiv + 384 pp. - get paper here
  • Manthey U 2010. Agamid Lizards of Southern Asia. Draconinae 2 -Leiolepidinae. Edition Chimaira, Terralog 7b, Frankfurt, 168 pp.
  • Manthey, U. & Grossmann, W. 1997. Amphibien & Reptilien Südostasiens. Natur und Tier Verlag (Münster), 512 pp. - get paper here
  • TEYNIÉ, ALEXANDRE; PATRICK DAVID, & ANNEMARIE OHLER 2010. Note on a collection of Amphibians and Reptiles from Western Sumatra (Indonesia), with the description of a new species of the genus Bufo. Zootaxa 2416: 1–43 - get paper here
  • Voris, H.U. 1977. Comparison of Herpetofauna diversity in tree buttresses of evergreen tropical forests. Herpetologica 33: 375-380. - get paper here
  • Werner, F. 1900. Reptilien und Batrachier aus Sumatra, gesammelt Herrn. Gustav Schneider jr., im Jahre 1897-1898. Zool. Jahrb. (syst) 13: 479-508 - get paper here
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