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Hemidactylus

From Wikipedia, the free encyclopedia
Genus of common geckos

Hemidactylus
Top:Flat-tailed house gecko
Bottom:Asian house gecko
Scientific classificationEdit this classification
Kingdom:Animalia
Phylum:Chordata
Class:Reptilia
Order:Squamata
Suborder:Gekkota
Family:Gekkonidae
Subfamily:Gekkoninae
Genus:Hemidactylus
Oken, 1817[1]
Type species
Gecko tuberculosus
Raddi, 1823
Diversity
194 species, see text
Synonyms
List (in alphabetical order)

Hemidactylus (fromAncient Greek ἡμι- (hēmi-), meaning 'half', and δάκτυλος (dáktulos), meaning 'finger') is agenus of the commongeckofamily,Gekkonidae.[3][4] It has 194[5] describedspecies, newfound ones being described every few years. These geckos are found in all thetropical regions of the world, extending into thesubtropical parts ofAfrica andEurope. They excel in colonizingoceanic islands byrafting onflotsam, and are for example found across most ofPolynesia. In somearchipelagoes,cryptic species complexes are found.[2] Geckos like to live in and out of houses. They have been introduced to many areas around the world.[citation needed]

This species is closely related to the genusGehyra, which belongs to the same family in Gekkonidae.

The species are typically known ashouse geckos, due to their readiness to adapt to and coexist with humans, and can be easily encountered in human habitations.

Taxonomy

[edit]

This genus was originally established byLorenz Oken in 1817 for the species at that time known asHemidactylus tuberculosus, and now described as thetropical house gecko (Hemidactylus mabouia).[2] The species name in turn comes from the Greek wordsἡμιhemi "half" andδάκτυλοςdáktylos "fingers" because its toes have split or "half"lamella underneath them.[6]

Evolution

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The origin of the genusHemidactylus is still unclear as the higher level phylogeny is not well resolved. Moreover, much of the diversity in this group still remains to be discovered.

Feces

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A house gecko will usually confine its excretions to one area of a house. This is sometimes considered a nuisance by home owners, and may stain certain surfaces.[7] The feces are approximately five (5) millimeters in length, two (2) millimeters wide, and dark brown (almost black) in color.

Description

[edit]
Foot upperside (left) and underside of theOriental leaf-toed gecko (H. bowringii).

Thedorsalscale pattern is either uniform or heterogeneous. The pupil of the eye is vertical. Males have pre-anal orfemoral pores. Each finger or toe has a slenderdistal clawedjoint, angularly bent and rising from within the extremity of the dilated portion.[8]

The fingers and toes are free, or more or less webbed, and dilated; underneath they bear a straight line running down theirlamellae, which is in a pattern resembling aparipinnatecompound leaf.[8] This leads to their other and more ambiguous common name, "leaf-toed geckos", used mainly for species fromSouth Asia and its surroundings to prevent confusion with the many "leaf-toed"Gekkota not inHemidactylus.

Some members of the genus, such asH. platyurus, are able to runquadrupedally across water by a partiallysurface tension-dependent mechanism distinct from thebipedal gait ofbasilisks.[9]

Communication

[edit]

Like many other gecko species, species in the genusHemidactylus are able to communicate with distinct vocalizations. Depending on the species, their vocalizations range from quiet clicks to short squeaks and chirps. For example, the Asiancommon house gecko (Hemidactylus frenatus) is notable for its distinctive chirping.

Species

[edit]
H. brookii
H. flaviviridus
Adultcommon house gecko (H. frenatus) inChennai, India
H. garnotii
Adultgiant leaf-toed gecko (H. giganteus) fromDindigul (Tamil Nadu,India)
H. graniticolus
H. maculatus
H. prashadi
Mediterranean house gecko (H. turcicus)
H. varadgirii

Phylogeny

[edit]

The following phylogeny is from Pyron,et al. (2013),[14] and includes 47Hemidactylus species.Hemidactylus is asister group ofCyrtodactylus.[14]

Hemidactylus

References

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  1. ^"Hemidactylus ".Dahms Tierleben. www.dahmstierleben.de
  2. ^abcLizards of the World (2004)."Hemidactylus". Archived fromthe original on 28 August 2008. Retrieved4 April 2009.
  3. ^Uetz, Peter, ed. (2021) [1995]."Higher Taxa in Extant Reptiles".The Reptile Database. Zoological Museum Hamburg. Retrieved10 December 2022.
  4. ^Savage, Melissa (2001)."Hemidactylus".Animal Diversity Web. University of Michigan Museum of Zoology. Retrieved10 December 2022.
  5. ^GenusHemidactylus atThe Reptile Database www.reptile-database.org. Accessed September 2023.
  6. ^Uetz, Peter, ed. (2023) [1995]."Hemidactylus mabouia (Moreau de Jonnès, 1818)".The Reptile Database. Zoology Museum Hamburg. Retrieved8 March 2024.
  7. ^"House Geckos".
  8. ^abBoulenger, G.A. (1890).The Fauna of British India, Including Ceylon and Burma. Reptilia and Batrachia. London: Secretary of State for India in Council. (Taylor and Francis, printers). xviii + 541 pp. (GenusHemidactylus, p. 82).Fulltext at theInternet Archive
  9. ^Nirody, J. A.; Jinn, J.; Libby, T.; Lee, T. J.; Jusufi, A.; Hu, D. L.; Full, R. J. (2018)."Geckos Race Across the Water's Surface Using Multiple Mechanisms".Current Biology.28 (24): 4046–4051.e2.Bibcode:2018CBio...28E4046N.doi:10.1016/j.cub.2018.10.064.PMID 30528580.
  10. ^Angarwal I,Giri VB,Bauer AM (2011). "A new cryptic rock-dwellingHemidactylus (Squamata: Gekkonidae) from south India".Zootaxa2765: 21–37. (Hemidactylus graniticolus, new species).
  11. ^abBeolens, Bo;Watkins, Michael; Grayson, Michael (2011).The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp.ISBN 978-1-4214-0135-5. (Hemidactylus greeffii, p. 107;Cyrtodactylus malcolmsmithi, p. 247).
  12. ^SpeciesHemidactylus greeffii atThe Reptile Database www.reptile-database.org.
  13. ^Henle K,Böhme W (2003)."A new species ofHemidactylus (Squamata: Gekkonidae) from West Africa, and comments on species hitherto confused withH. muriceus ".African Journal of Herpetology52 (1) 23–38. (Hemidactylus pseudomuriceus, new species).
  14. ^abPyron, R. Alexander;Burbrink, Frank T.;Wiens, John J. (2013). "A phylogeny and revised classification of Squamata, including 4161 species of lizards and snakes".BMC Evolutionary Biology13 (1): 93. DOI: 10.1186/1471-2148-13-93

External links

[edit]
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