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Cottone, Amanda M. and Aaron M. Bauer. 2008.
Tail autotomy. Psammophylax r. rhombeatus (Linnaeus, 1758) AND Psammophis spp.
Rhombic Skaapsteker and Sand Snakes.
African Herp News 44, April 2008.

Abstract

Authors recorded tail autotomy in 856 specimens of psammophiids from the collection of museums in the US and South-Africa. For Psammophis crucifer, P. biseriatus and P. schokari they found autotomy frequencies to be much lower than those previously reported by Broadley 1987, and they assume that autotomy in psammophiids is less common than preciously believed. Frequencies were higher in psammophidds distributed at lower latitudes than in the more temperate species, which could mean that ecological rather than historical factors are important to the degree of expression of this escape strategy.