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Cyrtodactylus serratus KRAUS, 2007

IUCN Red List - Cyrtodactylus serratus - Least Concern, LC

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Higher TaxaGekkonidae, Gekkota, Sauria, Squamata (lizards: geckos)
Common Names 
SynonymCyrtodactylus serratus KRAUS 2007
Cyrtodactylus cf. serratus — BAKER 2016 
DistributionPapua New Guinea (Star Mts of Sandaun)

Type locality: Tabubil, West Sepik Province, Papua New Guinea. Coordinates provided in the paper are in error and should be 5°15' S, 141°12' E (AMS type catalog).  
TypesHolotype: AMS R127707 (field tag 33910), mature male, collected by H. G. Cogger 
DiagnosisDiagnosis: A large (139 mm SV) species of Cyrtodactylus having highly raised, dentate tubercles arrayed along the length of each skin fold; approximately 10–11 regular rows of dorsal tubercles between lateral skin folds; large number (n = 87) of precloacal and femoral pores in a single series forming a shallow V- shape anterior to the cloaca; enlarged scales present anterior and posterior to the row of precloacal pores; small, divided scales under the tail; regular whorls of six enlarged tubercles arrayed along the length of the tail; uniformly sized scales on throat; and a color pattern consisting of a dark chevron on the nape followed by three pairs of dark brown ovals on body and six dark bands on tail.
CommentSpecimens: only known from the holotype (OLIVER et al. 2012).

Type locality: the coordinates provided in the paper (9º15'S, 152º12'E) are in error.

Cyrtodactylus serratus appears superficially most similar to Cyrtodactylus loriae, sharing with that species large size, divided subcaudals, numerous femoral-precloacal pores arrayed in a shallow chevron, and color pattern consisting of paired elongate blotches. The two species are geographically widely separated from each other and quite likely to be restricted to distinct and non-overlapping biogeographic realms. Cyrtodactylus loriae is reported from the Southeast Peninsula of New Guinea and adjacent areas in the Central Highlands and Huon Peninsula (Bauer & Henle 1994), whereas C. serratus is as yet only known from the distant Star Mts.

Comparisons with other species.—Cyrtodactylus serratus can be immediately distinguished from all other Papuan members of the genus by its row of prominent, dentate tubercles along the lateral skin folds (Fig. 1C). It may be further distinguished from C. aaroni Günther & Rösler, C. louisiadensis (de Vis), and C. murua Kraus & Allison in having highly divided (vs. wide, undivided) subcaudal scales; from C. sermowaiensis (de Rooij) in its much greater size and in having (vs. lacking) precloacal and femoral pores; from C. marmoratus (Kuhl) and C. papuensis (Brongersma) in having the precloacal pores arrayed in a shallow (vs. sunken, highly compressed) chevron-shaped series; from C. irianjayensis Rösler in having many more precloacal-femoral pores (87 vs. 7–16); from C. mimikanus (Boulenger) in having the precloacal-femoral pores arrayed in continuous (vs. discontinuous) series; from C. novaeguineae (Schlegel) in lacking (vs. having) tubercles on the throat; and from C. derongo Brown & Parker and C. loriae (Boulenger) in having fewer dorsal rows of enlarged tubercles (10–11 vs. 20–22). 
Etymology– The trivial epithet is a masculine Latin adjective meaning “toothed like a saw” and refers to the enlarged lateral tubercles of the species, which impart a dentate appearance to the animal when viewed from above. 
  • BAKER, Nick 2016. Three records of Cyrtodactylus sp. from 'Bilip', Gulf Province, Papua New Guinea. SEAVR 2016: 91-94 - get paper here
  • Grismer, L. L., Wood, P. L., Poyarkov, N. A., Le, M. D., Kraus, F., Agarwal, I., ... & Grismer, J. L. 2021. Phylogenetic partitioning of the third-largest vertebrate genus in the world, Cyrtodactylus Gray, 1827 (Reptilia; Squamata; Gekkonidae) and its relevance to taxonomy and conservation. Vertebrate Zoology 71: 101–154 - get paper here
  • Grismer, Lee; Wood, Perry L., Jr.; Poyarkov, Nikolay A.; Le, Minh D.; Karunarathna, Suranjan; Chomdej, Siriwadee; Suwannapoom, Chatmongkon; Qi, Shuo; Liu, Shuo; Che, Jing; Quah, Evan S.H.; Kraus, Fred; Oliver, Paul M.; Riyanto, Awal; Pauwels, Olivier 2021. Karstic Landscapes Are Foci of Species Diversity in the World’s Third-Largest Vertebrate Genus Cyrtodactylus Gray, 1827 (Reptilia: Squamata; Gekkonidae). Diversity 13 (5): 183 - get paper here
  • Kraus, Fred 2007. A new species of Cyrtodactylus (Squamata: Gekkonidae) from western Papua New Guinea. Zootaxa 1425: 63-68 - get paper here
  • Kraus, Fred 2008. Taxonomic partitioning of Cyrtodactylus louisiadensis (Lacertilia: Gekkonidae) from Papua New Guinea. Zootaxa 1883: 1–27 - get paper here
  • 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
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