The first Haramiyid (Mammalia, Allotheria) from the Jurassic of Russia

Abstract

103 The order Haramiyida is one of the most ancient mammal groups. The first known haramiyids come from the Upper Norian (Upper Triassic, about 212 Ma) of Europe. In the Late Triassic–Early Juras sic, haramiyids were common in European mammal faunas and rare in North America [1, 2]. Previously, Middle Jurassic haramiyids have only been found in England [3, 4]. Late Jurassic haramiyids occur in Tanzania [5, 6] and China [7, 8]. The latest haramiy ids are probably recorded in the Upper Cretaceous (Maastrichtian) of India [9]. Apart from the unique find of a partial skeleton of Haramiyavia in the Upper Triassic of Greenland [10], haramiyids are only rep resented by isolated teeth. In the present study, a new haramiyid species from the Middle Jurassic of Siberia is described; it is represented by isolated upper and lower teeth. The material comes from the Itat For mation of the Berezovsk quarry locality in the south ern Krasnoyarsk Territory, which has previously yielded remains of various docodonts, an eutricon odont, dryolestid, amphitheriid, and a more advanced mammal from the stem group of Zatheria (for review, see [11]). The nomenclature of tooth cusps of haramiyids follows Butler ([1], see also [2]). The collection examined is stored in the Borissiak Paleontological Institute of the Russian Academy of Sciences, Moscow (PIN). Class Mammalia Linnaeus, 1758