The effect of amputation of polymelic walking legs and of parts of appendage complexes in Tegenaria atrica (Araneae: Agelenidae)

Experiments on the epimorphic capabilities of polymelic walking appendages and those forming so-called complex anomalies in Tegenaria utrica C. L. Koch were carried out in two stages. First the appropriate changes in the structure of the prosoma were induced using the teratogenic effect of alternating temperatures 114 and 32[degree]C, changing every 12 h) on developing embryos. Secondly, some fragments of the deformed appendages were amputated using steelon thread ligatures in order to observe the successive phases of the regeneration process. Until the termination of the experiments, no external regenerates were found on the post-amputation surfaces in any of the operated individuals.