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Gordeev D. A. CASES OF INCOMPLETE AUTOTOMY AND TAIL REGENERATION ABNORMALITY OF THE STEPPE-RUNNER (EREMIAS ARGUTA (PALLAS, 1773)) AND SAND LIZARD (LACERTA AGILIS LINNAEUS, 1758) IN THE VOLGOGRAD REGION. Current Studies in Herpetology, 2017, vol. 17, iss. , pp. 3-?. DOI: https://doi.org/10.18500/1814-6090-2017-17-1-2-3-9


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598.112

CASES OF INCOMPLETE AUTOTOMY AND TAIL REGENERATION ABNORMALITY OF THE STEPPE-RUNNER (EREMIAS ARGUTA (PALLAS, 1773)) AND SAND LIZARD (LACERTA AGILIS LINNAEUS, 1758) IN THE VOLGOGRAD REGION

Abstract

The tail regeneration frequency in 55 lizards from the Volgograd region was analyzed, among which were 12 steppe-runners (Eremias arguta (Pallas, 1773)) and 43 sand lizards (Lacerta agilis Linnaeus, 1758). The following cases of tail regenerates were observed: 0) a normal tail; 1) regeneration in the distal third; 2) a tail regenerated from the middle part; and 3) autotomy near the base (the proximal third). The majority of the lizards had normal tails (60.0% of E. arguta and 83.2/57.1% of L. agilis in females/males). Only 16.7% of the steppe-runners had regenerated tails in the distal part whereas 8.4% of females and 28.6% of males had autotomy with subsequent regeneration in the proximal third of the tail; 5.6% of females and 14.3% of males had regenerated autotomy in the distal part, and 2.8% of females had it in the middle part of the tail. Two lizards with bifurcated tails were found and described: a male of E. arguta and a female of L. agilis. A case of complicated abnormality of tail regeneration in a male of L. agilis is also described. An X-ray study has shown that caudal bifurcation may appear as a result of both the primary and secondary (in the cartilage tube) regeneration.

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