Directional and fluctuating asymmetries in Cavall Pirinenc Català breed molars
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Deviations from expected perfect symmetry in biological forms can occur, and organisms develop several kinds of asymmetries. Among others, there are fluctuating asymmetry (FA) and directional asymmetry (DA). Thirty-two complete skulls were obtained from horses belonging to the"Cavall Pirinenc Català" breed and the mesiodistal and the palatinovestibular lengths of the right and left upper molar series were analyzed in order to study FA and DA. Neither FA nor DA were detected in the studied sample. The results of this study will provide researchers with new morphological information about natural teeth wearing (based on grazing) and may also be used as a reference for designing experimental studies, especially on mandibular catch-up growth, and as an aid to zooarchaeologists in evaluating results from buried animal studies for comparison with living equine populations.