Evolution and Systematics
The feet of gecko self-clean due to energetic equilibrium--its foot has less physical attraction to dust than most surfaces.
"A tokay gecko can cling to virtually any surface and support its body mass with a single toe by using the millions of keratinous setae on its toe pads. Each seta branches into hundreds of 200-nm spatulae that make intimate contact with a variety of surface profiles. We showed previously that the combined surface area of billions of spatulae maximizes van der Waals interactions to generate large adhesive and shear forces. Geckos are not known to groom their feet yet retain their stickiness for months between molts. How geckos manage to keep their feet clean while walking about with sticky toes has remained a puzzle until now. Although self-cleaning by water droplets occurs in plant and animal surfaces, no adhesive has been shown to self-clean. In the present study, we demonstrate that gecko setae are a self-cleaning adhesive. Geckos with dirty feet recovered their ability to cling to vertical surfaces after only a few steps. Self-cleaning occurred in arrays of setae isolated from the gecko. Contact mechanical models suggest that self-cleaning occurs by an energetic disequilibrium between the adhesive forces attracting a dirt particle to the substrate and those attracting the same particle to one or more spatulae. We propose that the property of self-cleaning is intrinsic to the setal nanostructure and therefore should be replicable in synthetic adhesive materials in the future."(Hansen 2005:385)
Learn more about this functional adaptation.
Molecular Biology and Genetics
Statistics of barcoding coverage
Specimens with Sequences:125
Specimens with Barcodes:109
Species With Barcodes:13
Statistics of barcoding coverage: Gekko cf. hokouensis
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
|This article needs additional citations for verification. (October 2008)|
Gekko is a genus of colorful and diverse Southeast Asian geckos commonly known as true geckos or calling geckos. Although species such as Gekko gecko (the tokay gecko) are very widespread and common, some species in the same genus have a very small range and are considered rare or endangered.
The following 51 species are recognized as being valid.
- Gekko adleri Nguyen et al., 2013
- Gekko albofasciolatus (A. Günther, 1867)
- Gekko athymus W.C. Brown & Alcala, 1962 – Brown's gecko
- Gekko auriverrucosus Zhou & Liu, 1982 – Shanxi gecko
- Gekko badenii Szczerbak & Nekrasova, 1994
- Gekko canaensis Ngo & Gamble, 2011
- Gekko canhi Rösler et al., 2010 – Tắc kè Cảnh
- Gekko carusadensis Linkem et al., 2010
- Gekko chinensis (Gray, 1842) – Gray's Chinese gecko
- Gekko coi R.M. Brown et al., 2011
- Gekko crombota R.M. Brown et al., 2008
- Gekko ernstkelleri Rösler et al., 2006
- Gekko gecko (Linnaeus, 1758) – tokay gecko
- Gekko gigante W.C. Brown & Alcala, 1978 – giant gecko
- Gekko grossmanni R. Günther, 1994
- Gekko hokouensis Pope, 1928 – Kwangsi gecko
- Gekko japonicus (Schlegel, 1836) – Schlegel's Japanese gecko
- Gekko kikuchii (Ōshima, 1912) – Botel gecko
- Gekko lauhachindai Panitvong et al., 2010 – Lauhachinda's cave gecko
- Gekko melli (T. Vogt, 1922)
- Gekko mindorensis Taylor, 1919
- Gekko monarchus (Schlegel, 1836) – spotted house gecko
- Gekko nutaphandi Bauer et al., 2008
- Gekko palawanensis Taylor, 1925 – Palawan gecko
- Gekko palmatus Boulenger, 1907 – palm gecko
- Gekko petricolus Taylor, 1962 – sandstone gecko
- Gekko porosus Taylor, 1922 – Taylor's gecko
- Gekko reevesii (Gray, 1831)
- Gekko remotus Rösler et al., 2012
- Gekko romblon W.C. Brown & Alcala, 1978 – Philippine gecko
- Gekko rossi R.M. Brown et al., 2009
- Gekko russelltraini Ngo et al., 2009
- Gekko scabridus Liu & Zhou, 1982 – Yunan gecko
- Gekko scientiadventura Rösler et al., 2005
- Gekko shibatai Toda et al., 2008
- Gekko siamensis Grossman & Ulber, 1990 – Siamese green-eyed gecko
- Gekko similignum M.A. Smith, 1923
- Gekko smithii Gray, 1842 – (Andrew) Smith's green-eyed gecko
- Gekko subpalmatus (A. Günther, 1864) – southern palm gecko
- Gekko swinhonis (A. Günther, 1864) – Peking gecko
- Gekko taibaiensis Song, 1985 – Mingtao's gecko
- Gekko takouensis Ngo & Gamble, 2010
- Gekko tawaensis Okada, 1956 – Tawa gecko
- Gekko taylori Hidetoshi Ota
- Gekko truongi Phung & Ziegler, 2011
- Gekko verreauxi Tytler, 1865
- Gekko vertebralis Toda et al., 2008
- Gekko vietnamensis Sang, 2010
- Gekko vittatus Houttuyn, 1782 – lined gecko
- Gekko wenxianensis Zhou & Wang, 2008
- Gekko yakuensis T. Matsui & Okada, 1968 – Yakushima gecko
- Integrated Taxonomic Information System (ITIS). www.itis.gov.
- "Gekko". The Reptile Database. www.reptile-database.org.
- "Gekko canaensis sp. nov. (Squamata: Gekkonidae), a new gecko from southern Vietnam." (Pdf) (Press release). Zootaxa 2890: 53-64. 25 May 2011.
- Rösler, H. et al. 2010: A new species of the genus Gekko Laurenti (Squamata: Sauria: Gekkonidae) from Vietnam with remarks on G. japonicus (Schlegel). Zootaxa, 2329: 56–68. Preview
- Linkem, C.W.; Siler, C.D.; Diesmos, A.C.; Sy, E.; Brown, R.M. 2010: A new species of Gekko (Squamata: Gekkonidae) from central Luzon Island, Philippines. Zootaxa, 2396: 37–49. Preview
- Forgotten species: the subterranean Gekko gigante (12/03/2014) news.mongabay.com.
- Panitvong, N., Sumontha, M., Konlek, K., & Kunya, K. (2010). "Gekko lauhachindai sp. nov., a new cave-dwelling gecko (Reptilia: Gekkonidae) from central Thailand." Zootaxa 2671: 40–52.
- 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. (Gekko smithii, p. 246).
- A new poreless species of Gekko Laurenti, 1768 (Gekkonidae: Squamata) from An Giang Province, southern Vietnam Nguyễn Ngọc Sang, Zootaxa 2501: 54-60. (10/6/2010)
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