The hipparions of ‘Arambourg collection’ from Axios Valley (Macedonia, Greece): systematic revision and correlation of the old with the new localities

‘Arambourg collection’ is a collection of mainly mammal fossils from Axios Valley (Macedonia, Greece) made by the French geologist C. Arambourg during 1915–16. It is housed in the Muséum national d’Histoire naturelle of Paris. New excavations in Axios Valley during the last 50 years allowed the collection of many fossils and a new taxonomy of hipparions has been proposed. The revision of the hipparionine horses of this old collection based on the new taxonomy and an effort to correlate the old localities of Arambourg with the well dated new ones, found in the area, are given in this article. The available material from the different localities is fragmentary, mixed and in most cases poor without locality indications, preventing definite determinations.The following taxa have been recognised: <i>H. phillipus, H</i>. aff. <i>mediterraneum; H</i>. aff. <i>proboscideum</i>, and <i>H</i>. aff. <i>macedonicum</i> or <i>H</i>. aff. <i>sithonis</i>. Based on the fauna, lithology and the map of Arambourg, the old localities are correlated with the new lithostratigraphy and localities. The age of the old localities is late Vallesian-late Turolian (MN10-13) and agrees with the results taken from the new studies in the area.