Hoplodactylus

Last updated

Hoplodactylus
Duvaucel's gecko.JPG
Duvaucel's gecko (Hoplodactylus duvaucelii)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Squamata
Family: Diplodactylidae
Genus: Hoplodactylus
Fitzinger, 1843
Species

See text

Hoplodactylus is a genus of geckos in the family Diplodactylidae. The genus is endemic to New Zealand, one of the seven genera of geckos found only in New Zealand. Hoplodactylus comprises two species of large to gigantic brownish lizards.

Contents

Description

Species in this genus (now split into several genera) tend to have rather dull colouration with little variation on a generally brown/grey theme, although mottled greens are seen in some species, notably the forest gecko (Mokopirirakau granulatus). The one exception to this rule of general drabness in colouration is the striking "herring boned" colour pattern of green, brown, black and white that is displayed by the "Harlequin Gecko" (Tukutuku rakiurae).

Although generally species of this genus cannot compete with those of Naultinus in terms of their vivid and beautiful colouration, Hoplodactylus species do have the ability to subtly change their skin colour pattern to give better camouflage, thus reducing the risk of predation. "In some of the Hoplodactylus species, the ability to change colour provides a supplementary method of thermoregulation"(*1). When basking in cold conditions they can darken their skin to increase the amount of heat absorbed and conversely they can lighten the shades in hot weather to reflect more light and keep cool. All species in this genus have more or less nocturnal activity patterns in contrast to the solely diurnal nature of Naultinus species and unlike species in the latter genus, are not purely arboreal and will forage on the ground.

Hoplodactylus species do not have prehensile tails and are thus generally less reluctant to drop them when disturbed by predators than species in the genus Naultinus.

Many species of the genus Hoplodactylus also have toes that are broader and more expanded than do their relatives in the genus Naultinus.

The key differences between New Zealand's two endemic gecko genera are summarised in the table below

HoplodactylusNaultinus
Mainly grey-brownMainly green
NocturnalDiurnal
Terrestrial - sometimes on tree trunksArboreal: on foliage
Active-prey-searchingSit-and-wait predator
Fast movingSlow moving
Can change intensity of skin colourSkin colour intensity cannot be changed
Wide, non-prehensile tails - readily shedNarrow, tapering prehensile tails - reluctantly shed
Wider toe pad to assist climbing smooth surfaces in some speciesThin toe pads adapted for grasping twigs and foliage

*references used for this table; [1] [2]

Species

Hoplodactylus duvaucelii is the largest species of gecko remaining in New Zealand, although due to predation by introduced mammals such as the brown rat their confirmed range is at present largely restricted to pest-free offshore islands. However, in 2010 a Duvaucel's gecko was caught in a trap near Maungatautari, indicating that there are remnant populations on the New Zealand mainland. [3] In 2023, the population of Hoplodactylus from islands in Cook Strait was determined to be a distinct species, Hoplodactylus tohu , which is believed to have formerly had a range across the South Island. [4]

The extinct Hoplodactylus delcourti is the largest known gecko in the world. It was first described in 1986, though the only known specimen was collected in the early 19th century but was overlooked in a French museum for more than a century. However, it was later shown by genetic evidence to be nested within New Caledonian geckos, warranting its placement in the separate genus Gigarcanum, meaning that it is unlikely that the specimen originated in New Zealand, and thus was probably not the kawekaweau of Maori legend. [5]

Species list

Related Research Articles

<span class="mw-page-title-main">Rodrigues giant day gecko</span> Extinct species of lizard

The Rodrigues giant day gecko is an extinct species of day gecko. It lived on the island of Rodrigues and surrounding islands and typically dwelt on trees. The Rodrigues giant day gecko fed on insects and nectar, and, unlike most other day geckos, was apparently nocturnal in habit.

<i>Naultinus</i> Genus of lizards

Naultinus is a genus of geckos that are endemic to New Zealand. On account of their striking colouration, species in the genus Naultinus are commonly known as green geckos. There are nine described species in the genus. Species in the genus share a number of traits that set them apart as quite different from the rest of the world's two thousand odd gecko species, which are generally brown in colour, ovivaparous, short-lived and nocturnal. In contrast, Naultinus are green, ovovivaparous, live up to 30 years or more and are strictly diurnal. New Zealand has a temperate, maritime climate, and in terms of distribution Naultinus is one of the southernmost gecko genera in the world — some species live in habitats in the South Island which receive regular snowfall in winter. Animals in this genus possess several physiological and behavioural adaptations to cope with these periods of low temperatures and adverse weather.

<span class="mw-page-title-main">Crested gecko</span> Species of lizard

The crested gecko or eyelash gecko is a species of gecko native to southern New Caledonia (France). In 1866, the crested gecko was described by French zoologist Alphonse Guichenot. This species was thought to be extinct until it was rediscovered in 1994 during an expedition led by Robert Seipp. Along with several other New Caledonian gecko species, it is being considered for protected status by the Convention on the International Trade in Endangered Species of Wild Flora and Fauna.

<i>Rhacodactylus leachianus</i> Species of lizard

Rhacodactylus leachianus, commonly known as the New Caledonian giant gecko, Leach's giant gecko, leachianus gecko, or simply Leachie, is the largest living species of gecko and a member of the family Diplodactylidae. It is native to most of New Caledonia.

<span class="mw-page-title-main">Duvaucel's gecko</span> Species of reptile

Duvaucel's gecko is a species of lizard in the family Diplodactylidae. The species is endemic to New Zealand.

<i>Gigarcanum</i> Extinct species of lizard

Gigarcanum delcourti, formerly Hoplodactylus delcourti, is an extinct species of gecko in the family Diplodactylidae. It is the largest known of all geckos, with a snout-to-vent length (SVL) of 37 cm (14.6 in) and an overall length of at least 60 cm (23.6 in). It is only known from a single taxidermied specimen collected in the 19th century that was rediscovered unlabelled in a museum in France. The origin of the specimen was undocumented. While originally suggested to have been from New Zealand and the kawekaweau of Māori oral tradition, DNA evidence from the specimen suggests that it originates from New Caledonia.

<span class="mw-page-title-main">Gold-striped gecko</span> Species of reptile

The gold-striped gecko, gold-stripe gecko, or golden sticky-toed gecko is a species of gecko in the family Diplodactylidae. It is endemic to New Zealand, and is only found in the Taranaki region and Mana Island. The holotype is in the collection of the Museum of New Zealand Te Papa Tongarewa.

<span class="mw-page-title-main">Black-eyed gecko</span> Species of lizard

The black-eyed gecko, also known commonly as Whitaker's sticky-toed gecko, is a species of lizard in the family Diplodactylidae. An alpine gecko species, discovered in 1970, it inhabits high-altitude mountains in three areas of the South Island of New Zealand. It is the highest-altitude lizard species in New Zealand, living up to 2,200 m (7,200 ft) above sea level.

<span class="mw-page-title-main">Harlequin gecko</span> Species of lizard

The harlequin gecko, formerly Hoplodactylus rakiurae, is a species of gecko, a lizard in the family Diplodactylidae. The species is endemic to Stewart Island/Rakiura in the far south of New Zealand, where it was discovered in 1969. In terms of distribution it is one of the southernmost gecko species in the world.

<span class="mw-page-title-main">Stephen's Island gecko</span> Species of reptile

The Stephen's Island gecko, also known commonly as the Cook Strait striped gecko, Stephen's sticky-toed gecko, and the striped gecko, is a species of gecko in the genus Toropuku in the family Diplodactylidae. The species is endemic to New Zealand.

<span class="mw-page-title-main">Jewelled gecko</span> Species of lizard

The jewelled gecko is a threatened species of lizard in the family Diplodactylidae. The species is endemic to the South Island of New Zealand.

<span class="mw-page-title-main">West Coast green gecko</span> Species of lizard

The West Coast green gecko is a species of the family Gekkonidae (gecko).

<i>Woodworthia maculata</i> Species of lizard

Woodworthia maculata, also known as the New Zealand common gecko or Raukawa gecko, is a species in the family Diplodactylidae. The specific name maculata means "speckled".

<span class="mw-page-title-main">Diplodactylidae</span> Family of lizards

The Diplodactylidae are a family in the suborder Gekkota (geckos), with over 150 species in 25 genera. These geckos occur in Australia, New Zealand, and New Caledonia. Diplodactylids are the most ecologically diverse and widespread family of geckos in both Australia and New Caledonia, and are the only family of geckos found in New Zealand. Three diplodactylid genera have recently been split into multiple new genera.

<span class="mw-page-title-main">Canterbury gecko</span> Species of lizard

The Canterbury gecko is a gecko found in the South Island of New Zealand. It is also known by the Māori names Waitaha gecko and Moko-pāpā, and as the brown gecko. It had previously been placed in a different genus and called Hoplodactylus brunneus, but further study split the genus Hoplodactylus into six genera, with some groups close to the former Hoplodactylus maculatus "Canterbury" being assigned to the new genus Woodworthia.

<span class="mw-page-title-main">Pygopodoidea</span> Superfamily of lizards

Pygopodoidea is a gecko superfamily and the only taxon in the gekkotan subclade Pygopodomorpha. The clade includes three Australasian families: Diplodactylidae, Carphodactylidae, and Pygopodidae. Traditional gekkotan systematics had considered Diplodactylidae and Carphodactylidae as subfamilies of the family Gekkonidae, but recent molecular work have placed Pygopodidae within Gekkonidae making it paraphyletic. These analyses have shown support of Pygopodidae and Carphodactylidae being sister taxa, with Diplodactylidae occupying a basal position in Pygopodoidea.

The Waitomo Caves Discovery Centre is a museum located in the town of Waitomo in the North Island of New Zealand. The museum is also referred to as the Waitomo Caves Discovery Centre, the Waitomo Museum of Caves and the Waitomo Education Centre.

Hoplodactylus tohu, the Tohu gecko, is a species of lizard of the family Diplodactylidae. The lizard is found in the Marlborough Sounds / Cook Strait area of New Zealand.

References

  1. Gibbs, George (2006). Ghosts of Gondwana; The History of Life in New Zealand. Nelson, New Zealand: Craig Potton Publishing. 232 pp. ISBN   978-1877333484.
  2. Gill, Brian; Whitaker, Tony (1996). New Zealand Frogs and Reptiles. Auckland: David Bateman Publishing. 112 pp. ISBN   1-86953-264-3.
  3. Neems, Jeff (22 April 2010). "Rare lizard killed in trap". Waikato Times . Retrieved 17 January 2023.
  4. Scarsbrook, Lachie; Walton, Kerry; Rawlence, Nicolas J.; Hitchmough, Rodney A. (13 January 2023). "Revision of the New Zealand gecko genus Hoplodactylus, with the description of a new species". Zootaxa. 5228 (3): 267–291. doi:10.11646/zootaxa.5228.3.3. PMID   37044651.
  5. Heinicke, Matthew P.; Nielsen, Stuart V.; Bauer, Aaron M.; Kelly, Ryan; Geneva, Anthony J.; Daza, Juan D.; Keating, Shannon E.; Gamble, Tony (2023-06-19). "Reappraising the evolutionary history of the largest known gecko, the presumably extinct Hoplodactylus delcourti, via high-throughput sequencing of archival DNA". Scientific Reports. 13 (1): 9141. Bibcode:2023NatSR..13.9141H. doi:10.1038/s41598-023-35210-8. ISSN   2045-2322. PMC   10279644 . PMID   37336900.

Further reading