Viviparous Lizard


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Viviparous Lizard

 

(Lacerta viviparta), a reptile of the family Lacertidae. Body length, 15 to 18 cm; tail length, 10 to 11 cm. Its dorsal coloration is brown with black spots. The males have an orange abdomen; females have green or yellow abdomens. The viviparous lizard, distributed throughout Europe (except in the southeast) and northern Asia, is found on mountains up to 3,000 m in elevation. It lives primarily in hummocky swamps with shrubs and in coniferous and deciduous forests and feeds on insects, spiders, and other small invertebrates.

The fertilized eggs remain in the oviducts, where their development takes approximately three months. The young usually emerge from the mother still in the eggshells, hatching within several minutes (this method of reproduction is called ovoviviparity). The young measure up to 4 cm long and are black. The litter of older females consists of eight to 12 off-spring; young females bear two to five. Viviparous lizards winter in burrows, under tree roots, or under bark. Ovoviviparity developed in this species as a result of the cold continental climate. In the Pyrenees Mountains, however, the viviparous lizard is an egg-layer.

References in periodicals archive ?
And if you've ever gone for a walk on Howth Head, you may not have spotted the next star to feature in the show - only feet away from the path that thousands walk every year lurks Ireland's only native reptile, the viviparous lizard.
Asynchronous spermatogenesis and biennial female cycle of the viviparous lizard Phymaturus antofagastensis (Liolaemidae): reproductive responses to high altitudes and temperate climate of Catamarca, Argentina.
The common, or viviparous lizard, emerges from hibernation in March, and will bask in the sun like the rarer sand lizard, in a favoured spot.
Differential atresia of ovarian follicles and its effect on the clutch size of two populations of the viviparous lizard Sceloporus mucronatus.
Male and female reproductive cycles of the viviparous lizard, Mabuya capensis (Sauria: Scincidae) from South Africa.
Gonadal changes throughout the reproductive cycle of the viviparous lizard Sceloporus mucronatus (Sauria: Iguanidae).
Thermal biology of a viviparous lizard with temperature-dependent sex determination.
Physiological changes during the female reproductive cycle of the viviparous lizard Cordylus giganteus (Sauria:Cordylidae).
The viviparous lizard Sceloporus bicanthalis is a small, diurnal, ground-dwelling phrynosomatid lizard, restricted to the Neovolcanic Axis in the center of Mexico at 2,100-4,200 m elevation (Smith et al.
Diet and reproductive biology of the viviparous lizard Sceloporus torquatus torquatus (squamata: Phrynosomatidae).
Reproductive activity of three sympatric viviparous lizards at Omiltemi, Guerrero, Sierra Mache del Sur, Mexico.
As a consequence, if global warming continues at the same rate, viviparous lizards are facing extinction in the next few decades.