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Crenadactylus pilbarensis DOUGHTY, ELLIS & OLIVER, 2016

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Higher TaxaDiplodactylidae, Gekkota, Sauria, Squamata (lizards: geckos) 
Subspecies 
Common NamesPilbara clawless gecko 
SynonymCrenadactylus pilbarensis DOUGHTY, ELLIS & OLIVER 2016 
DistributionAustralia (Western Australia: Pilbara region, Burrup Peninsula)

Type locality: Burrup Peninsula, Western Australia (20°35'34"S, 116°47'58"E)  
Reproductionoviparous 
TypesHolotype. WAM R132630, adult female, collected by B. Maryan, 31 May 1998. Fixed in 10% formalin, stored in 70% ethanol at WAM. Liver sample stored at the Evolutionary Biology Unit, South Australian Museum, Adelaide (SAMA).
Paratypes (6). WAM R100988, 80 km south of Telfer, WA (22°20'S, 122°05'E); WAM R132540, Burrup Peninsula, WA (20°36'45"S, 116°47'37"E); WAM R132627, WAM R132629, Burrup Peninsula, WA (20°35'34"S, 116°47'58"E); WAM R140394, Deepdale Outstation, Robe River Station, WA (21°43'S, 116°11'E) WAM R160059, 55 km east-south-east of Meentheena Outcamp, WA (21°19'19"S, 121°00'08"E). 
CommentDiagnosis. A small (to 28.4 mm SVL) species of Crenadactylus. Rostral in full contact with nostril, internasal (if present) not extending beyond supranasal, single greatly enlarged postmental, dorsal scales homogeneous and moderately keeled, 6 pre-cloacal pores in males with innermost pore-bearing scales in contact, no enlarged tubercles on original tails. Ground colour light brown; dorsal pattern consists of well-defined pale and dark longitudinal stripes, scattered clusters of 1–3 pale scales, lateral zones light grey to tan with stippling occasionally forming 1 or 2 broken or weakly defined lateral lines; ventrum pale off-white with weak to moderate stippling.

Variation. Most specimens conformed to the holotype, with some of the following exceptions. Males possessed 6 pre-cloacal pores (one individual with 4) in a continuous row. Pores formed by a notch in the posterior edge of scale. Females lacked pre-cloacal pores. In males the cloacal spurs are larger than those of females and protrude further than for females. Regrown tails tended to be paler with smaller scales compared to the tail of the holotype.
The diagnostic character of a greatly enlarged postmental was unambiguous in all specimens examined, although the shape tended to vary from round to oblong (Fig. 3F). Keeling on the dorsal scales also varied from weak keels to moderately strong.

Colouration and pattern. In life, light to dark brown ground colour with contrasting dark and pale longitudinal stripes. In preservative, thin vertebral stripe pale tan-grey, paravertebral stripes to either side emanating from top of eye and joining just before base of tail; pale dorsolateral stripe from antero-dorso portion of eye to tail, continuing anteriorly from eye as pale canthal stripe; dark brown triangular patch on snout continuous with dark brown crown, intermixed with paler scales; dark dorsolateral stripe from ventro-dorso portion of eye to above limbs to tail, anterior to eye forming dark loreal stripes; labials pale, heavily stippled with dark brown; lateral surfaces pale with thin dark brown stripes, uppermost more defined, lower lateral stripe can be extensively broken and indistinct; stippling on pale ventrum variable; limbs a mixture of dark and light brown scales with small clusters of pale scales apparent; regenerated tails a mixture of dark and pale brown scales, forming short lines or showing no pattern.

Habitat. Collection records indicate this species occurs in spinifex clumps on rocky hills and in gullies on the mainland, but sandy substrates for the Dolphin Island specimens. 
EtymologyNamed for the Pilbara region where this species occurs. 
References
  • DOUGHTY, PAUL; RYAN J. ELLIS, PAUL M. OLIVER 2016. Many things come in small packages: Revision of the clawless geckos (Crenadactylus: Diplodactylidae) of Australia. Zootaxa 4168 (2): 239–278
 
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