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Cyrtodactylus derongo BROWN & PARKER, 1973

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common NamesE: Derongo Bow-fingered Gecko 
SynonymCyrtodactylus derongo BROWN & PARKER 1973
Gonydactylus derongo — KLUGE 1991
Cyrtodactylus (Cyrtodactylus) derongo — RÖSLER 2000: 65 
DistributionNWC Papua New Guinea (Derongo area, Alice River System; ~400 m elevation)

Type locality: Derongo area at an elevation of 1300 feet, Alice River system, tributary to the upper Fly River, Papua, New Guinea.  
TypesHolotype: MCZ R126205 
DiagnosisDiagnosis. A Cyrtodactylus with small scales on postero- ventral surface of thighs meeting the enlarged scales of antero- ventral surface at a sharp boundary; the rows of enlarged femoral scales forming a continuous series with preanal rows; enlarged preanal scales posterior to the pore series absent; dorsal ground color dark brown with very faint darker blotches en-
ilarly useful in separating most of the New Guinea species. have not had the opportunity to examine specimens of C. novae- guineae.
Cyrtodactylus derongo new species
closing irregular rows of large, white tubercles
(Fig. 1)

Description. A moderately large Cyrtodactylus; four adult females measure 105-112 mm snout-vent length, one specimen 81 mm in snout-vent length is immature; head about one and one-half times its breadth; eye, large, its diameter about one- third of the length of the head and about equal to its distance from, the nostril; diameter of ear opening less than half its dis- tance from the eye; head covered with granules, very small posteriorly and somewhat larger anteriorly; scattered, moderate- sized, pointed tubercles as far anterior as the interorbital region rostral large, rectangular, its breadth about 60 percent of its length, nostril bordered by the rostral, supranasal, first labial and 3 small shields; upper labials 11 or 12; lower labials 11 to
13; supranasals large, separated by 1 or 2 scales; one large pair of postmentals in contact posteriorly for about half their length; distinct lateral fold lacking, but its normal position marked by a row of flattish tubercles separated from one another by several smaller scales; in the mid-body region, 20 irregular lines of dorsal tubercles between the aforementioned rows of flattish scales; 15 to 1 8 rows in the axillary region; some of the tubercles are white and tend to form widely separated irregular transverse lines, 8 to 10 between the nape and the hind limbs; undersurface of head with small granules; venter with about 46 to 48 rows of scales at the mid-body between the ventrolateral rows of tuber- cles, small and granular laterally, but merging gradually with the large cycloid scales of the mid-venter; the large preanal-pore scales in a very shallow "V" continuous with a row of femoral- pore scales that are gradually reduced in size along the femur; those anterior to the pore row somewhat enlarged, flattish scales on both the thighs and the preanal region, the latter merging with
those of the enter; posteriorly the pore series is met abruptly by small granular scales in both the preanal and femoral regions; 24 to 26 rows of lamellae and scales beneath the fourth toe; tail only slightly depressed, with square or rectangular plates toe; tail only slightly depressed, with square or rectangular plates on the ventral surface and with everv fourth or fifth scale dis- tinctly enlarged.

Comparisons. Differs from other Indo-Australian species of Cyrtodactylus in the rather uniformly dark ground color of dor- sum marked by large white tubercles. The color pattern is remi- niscent of that of Underwoodisaurus milU, but in the latter the white patches in 'olve small surrounding scales, and the patches may be fused into partial or complete transverse bands. Com- pared to other New Guinean species, C. derongo is somewhat 
CommentAbundance: only known from its original description (Meiri et al. 2017). 
EtymologyNamed after the type locality. 
  • Brown, Walter C. & Parker, Fred 1973. A new species of Cyrtodactylus (Gekkonidae) from New Guinea with a key to species from the island. Breviora (417): 1-7 - get paper here
  • Günther, R. & H. Rösler 2002. Eine neue Art der Gattung Cyrtodactylus GRAY, 1827 aus dem Westen von Neuguinea (Reptilia: Sauria: Gekkonidae). Salamandra 38 (4): 195-212 - get paper here
  • Kraus, Fred 2008. Taxonomic partitioning of Cyrtodactylus louisiadensis (Lacertilia: Gekkonidae) from Papua New Guinea. Zootaxa 1883: 1–27 - get paper here
  • Linkem, Charles W.; Jimmy A. McGuire, Christopher J. Hayden, Mohammed Iqbal Setiadi, David P. Bickford, and Rafe M. Brown 2008. A New Species of Bent-Toe Gecko (Gekkonidae: Cyrtodactylus) from Sulawesi Island, Eastern Indonesia. Herpetologica 64 (2): 224-234 - 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
  • Rösler, H. 2000. Kommentierte Liste der rezent, subrezent und fossil bekannten Geckotaxa (Reptilia: Gekkonomorpha). Gekkota 2: 28-153
  • Rösler, H. & Glaw, F. 2008. A new species of Cyrtodactylus Gray, 1827 (Squamata: Gekkonidae) from Malaysia including a literature survey of mensural and meristic data in the genus. Zootaxa 1729: 8–22 - get paper here
  • Rösler, H. & S. J. Richards & R. Günther 2007. Bemerkungen zur Morphologie und Taxonomie der östlich der Wallacea vorkommenden Geckos der Gattung Cyrtodactylus GRAY, 1827, mit Beschreibungen von zwei neuen Arten (Reptilia: Sauria: Gekkonidae). Salamandra 43 (4): 193-230 - get paper here
  • Rösler, H., Glaw, F.& R. Günther 2005. Aktualisierte Liste der Geckos von Neuguinea (Sauria: Geckonidae: Gekkoninae) mit vorläufiger Charakterisierung von neun Formen aus den Gattungen Cyrtodactylus Gray, 1827, Gehyra Gray, 1834 und Nactus Kluge, 1983. Gekkota 5: 33-64 - get paper here
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