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The New Mexico whiptail (Aspidoscelis neomexicanus) is a female-only species of lizard found in New Mexico and Arizona in the southwestern United States, and in Chihuahua in northern Mexico. It is the official state reptile of New Mexico. [2] It is one of many lizard species known to be parthenogenetic.
Female also use cloaca for elimination of digestive waste and for reproduction. For female lizards, the cloaca is the external genital opening for the genital canal, equivalent to vagina in mammals. Copulation is performed through cloacal kiss, in which the male and female press their cloacas together as the male discharges sperm.
Cnemidophorus arubensis, commonly known as the Aruba whiptail or cododo, is a species of whiptail lizard in the genus Cnemidophorus.The female and young lizards are known as Lagadishi (English: Lizard), while the mature males are called Blòblò (English: Blue-blue). [1]
The hemipenis is the intromittent organ of Squamata, [4] which is the second largest order of vertebrates with over 9,000 species distributed around the world. They differ from the intromittent organs of most other amniotes such as mammals, archosaurs and turtles that have a single genital tubercle, as squamates have the paired genitalia remaining separate. [5]
However, it is represented by only one living species: the tuatara (Sphenodon punctatus), a superficially lizard-like reptile native to New Zealand. [ 5 ] [ 6 ] Lepidosauria is a monophyletic group (i.e. a clade ), containing all descendants of the last common ancestor of squamates and rhynchocephalians. [ 7 ]
Parthenogenesis is a mode of asexual reproduction in which offspring are produced by females without the genetic contribution of a male. Among all the sexual vertebrates, the only examples of true parthenogenesis, in which all-female populations reproduce without the involvement of males, are found in squamate reptiles (snakes and lizards). [1]
Most lizard species are harmless to humans. Only the largest lizard species, the Komodo dragon, which reaches 3.3 m (11 ft) in length and weighs up to 166 kg (366 lb), has been known to stalk, attack, and, on occasion, kill humans. An eight-year-old Indonesian boy died from blood loss after an attack in 2007.
Females in many lizard species have the choice to mate with or reject males. [14] Females spend energy in investigating a male's traits in order to determine if he is healthy and has good genes. [14] In the species Side-blotched lizard (Uta stansburiana), males chosen by females had 76 percent less ectoparasites. [15]