Sarykum

Size and age changes in color in the Rapid racerunner, Eremias velox (Pallas, 1771) (Reptilia, Lacertilia) population on the Sarycum sandy massif

Authors: Polynova G. V., Polynova O. E., Leonova A. A.

The article is based on materials on age-related changes in the color of the lower surface of the tail and back of the thighs in the population of the Rapid racerunner (Eremias velox velox Pallas, 1771), living on the Sarykum sandy massif. The material was collected in the first ten days of May 2023. A total of 110 individuals were caught and described: 44 males, 36 females and 30 immature individuals. The size characteristics of sex and age groups are given.

Foster’s or island rule in populations of Phrynocephalus mystaceus and Eremias velox (Reptilia, Lacertilia) on the sandy massif Sarykum

Authors: Polynova G. V., Polynova O. E.

The sandy massif Sarykum, whose age is about 100 thousand years, is an island habitat for psammophilic species of terrestrial vertebrates. The paper presents new morphometric data on the populations of two species of psammophilous lizards living in this area. These are the nominative subspecies of the Secret Toadheaded Agama (Phrynocephalus mystaceus mystaceus Pallas, 1776) and the Caucasian Central Asian Racerunner (Eremias velox caucasica Lantz, 1928).