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 ?
Reproductive and fat body cycles of the viviparous lizard, Sceloporus mucronatus (Sauria: Iguanidae).
Climate effects on offspring sex ratio in a viviparous lizard.
Progesterone in the viviparous lizard Lacerta vivipara: ovarian biosynthesis, plasma levels, and binding to transcorticon-type protein during the sexual cycle.
Comparative demography of two viviparous lizards (Sceloporus jarrovi and S.
Reproductive activity on three sympatric viviparous lizards at Omiltemi, Guerrero, Sierra Madre del Sur, Mexico.
Gonadal changes throughout the reproductive cycle of the viviparous lizard Sceloporus mucronatus (Sauria: Iguanidae).
Effects of exogenous FSH on follicular recruitment in a viviparous lizard Niveoscincus metallicus (Scincidae).
Thermal biology of a viviparous lizard with temperature-dependent sex determination.
Temperature relationships in the high-altitude viviparous lizard, Sceloporus jarrovi.
Maternal basking opportunity affects juvenile phenotype in a viviparous lizard.
Diet and reproductive biology of the viviparous lizard Sceloporus torquatus (Squamata: Phrynosomatidae).
Physiological changes during the female reproductive cycle of the viviparous lizard Cordylus giganteus (Sauria: Cordylidae).