Christinus, a genus of Gekkonidae, are geckos found in southern regions of Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. It contains species and subspecies that are regionally termed as Marbled Geckos. The contrasted patterns of these geckos, its marbling, are found in a variety of reddish brown, grey, silver, white, black and purplish hues. They are frequently found in old knotted tree

Tree

A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...

s and sometimes congregate in large numbers in established urban environments.

The genus was named for Christine Biggs, a friend of one of the authors.

Classification of genus Christinus

Christinus was first described by Wells and Wellington in 1984, giving the types species as that published as Diplodactylus marmoratus Gray 1845. Their later proposal to establish a genus Ridegekko, based on Boulenger's original description of Phyllodactylus guentheri (C. guentheri), is not given in later literature.
The genus has been described as containing two species, the island population and the widespread southern population. The latter, C. marmoratus, has two or more subspecies in its distribution range. One proposed subspecies, Christinus marmoratus alexanderi Storr, has been elevated by some authorities to the rank of species.

Their arrangement of the genus may be summarised as follows:

• Christinus
  • Christinus alexanderi
    Christinus alexanderi
    Christinus alexanderi, a species of Gekkonidae, are geckos found in the Nullarbor Plain of Australia. It is one of the many species and subspecies that are regionally termed as Marbled Geckos.-Description:...
    
    (endemic to Nullarbor Plain
    Nullarbor Plain
    The Nullarbor Plain is part of the area of flat, almost treeless, arid or semi-arid country of southern Australia, located on the Great Australian Bight coast with the Great Victoria Desert to its north. It is the world's largest single piece of limestone, and occupies an area of about...
    
    )
  • Christinus guentheri
    Christinus guentheri
    Christinus guentheri is a species of lizard in the Gekkonidae family.It is found at Australia islands, at the Norfolk and Lord Howe Island, and has a common name Lord Howe Island Southern Gecko....
    
    , (Lord Howe
    Lord Howe Island
    Lord Howe Island is an irregularly crescent-shaped volcanic remnant in the Tasman Sea between Australia and New Zealand, directly east of mainland Port Macquarie, and about from Norfolk Island. The island is about 11 km long and between 2.8 km and 0.6 km wide with an area of...
    
     and Norfolk Island
    Norfolk Island
    Norfolk Island is a small island in the Pacific Ocean located between Australia, New Zealand and New Caledonia. The island is part of the Commonwealth of Australia, but it enjoys a large degree of self-governance...
    
    )
  • Christinus marmoratus, (widespread: southern mainland, northwest interior, islands)
    • Christinus marmoratus macrodactylus
    • Christinus marmoratus marmoratus