Underwoodisaurus milii

Underwoodisaurus milii
Conservation status
Not evaluated (IUCN 3.1)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Class:	Reptilia
Order:	Squamata
Suborder:	Sauria
Infraorder:	Gekkota
Family:	Carphodactylidae
Genus:	Underwoodisaurus
Species:	U. milii
Binomial name
Underwoodisaurus milii (Bory de Saint-Vincent, 1823)
Synonyms[1]
Phyllurus milii Bory de Saint-Vincent, 1823 Cyrtodactylus Nilii [sic] Gray, 1831 (ex errore) Gymnodactylus milii — Loveridge, 1934 Underwoodisaurus milii — Bustard, 1970 Nephrurus milii — Bauer, 1990 Underwoodisaurus milii — Cogger, 2014

Underwoodisaurus milii (synonym, Nephrurus milii ) is a species of gecko in the family Carphodactylidae. The species is commonly known as the thick-tailed or barking gecko, referring to its distinctive plump tail and sharp, barking defensive call.

Etymology

The specific name, milii, is in honor of French sailor and naturalist Pierre Bernard Milius.^[2]

Description

Thick-tailed geckos are reddish-brown with bands of white and yellow spots and paler underbelly. They usually grow to 120–140 mm in length.^[3] Their original tail is black with several pale bands, however regenerated tails have little pattern. When threatened, they will arch their backs and "bark". Thick-tailed geckos are found in rocky outcrops across southern Australia, and are slightly more cold-tolerant than many other Australian gecko species. They are nocturnal, and shelter underneath rocks or in burrows during the day. They feed on insects and small vertebrates.

Unusually for reptiles, this species forms aggregations in their retreat sites during the day. The reasons for this are unknown. However, it has been shown that this behavior results in a higher aggregate thermal inertia (they stay warmer) than would be found in solitary geckos of this and related kinds in similar circumstances.^[4] In the same source, it was suggested that aggregating for physiological benefits may precede the development of other kinds of social behavior.

Behaviour

This species, and some other species of gecko have the unusual habit of licking their eyes after eating, presumably to keep the eyeshield clean.^[3]

Distribution

They are found in southern regions of the Australia.

Their distribution in Western Australia is throughout the southwest, the goldfields, wheatbelt, and nullarbor regions to the east, and to Shark Bay in the north. They are also found at the Houtman Abrolhos and the Archipelago of the Recherche.^[5]

Conservation status

The species has not been assessed for the IUCN Red List, nor the Australian EPBC Act, and may be kept as a pet with the appropriate license in at least some states of Australia.

References

1. "Underwoodisaurus milii ". The Reptile Database. www.reptile-database.org.
2. Beolens B, Watkins M, Grayson M. 2011. The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Underwoodisaurus milii, p. 178).
3. Griffiths, Ken (1987). Reptiles of the Sydney Region. Three Sisters Publications Pty Ltd. p. 63. ISBN 0-9590203-3-0.
4. Lancaster J, Wilson P, Espinoza RE. 2006. Physiological benefits as precursors of sociality: Why banded geckos band. Animal Behavior 72: 199-207.
5. Browne-Cooper, Robert; Brian Bush; Brad Maryan; David Robinson (2007). Reptiles and Frogs in the Bush: Southwestern Australia. University of Western Australia Press. p. 128. ISBN 978-1-920694-74-6.

Further reading

• Bory de Saint-Vincent JB. 1823. Dictionnaire Classique d'Histoire Naturelle, Volume 7. Paris: Rey & Gravier. 640 pp. (Phyllurus milii, new species, p. 185). (in French).
• Cogger HG. 2014. Reptiles & Amphibians of Australia, Seventh Edition. Collingwood, Victoria, Australia: CSIRO Publishing. xxx + 1,033 pp. ISBN 978-0643100350. (Underwoodisaurus milii, p. 283).

External links

• Underwoodisaurus milii at the Encyclopedia of Life