Entwicklungsstufen der miozänen Cricetodontinae (Mammalia, Rodentia) Mittelspaniens und ihre stratigraphische Bedeutung

摘要: During the summer holidays of 1960 to 1963 a great many localities Miocene and Pliocene mammals were discovered in Southern part Zaragoza province (Spain). Remains both large small found, latter by sieving clays marls. This fauna consists mainly Cricetodontinae, Gliridae, Sciuridae, Lagomorpha Insectivora. The object present study is Cricetodontinae. Other families same will be described H. de Bruyn State University Utrecht, Netherlands. are situated along S.W. border Calatayud-Teruel basin. Apart from local faulting folding margin basin sediments undisturbed. circumstance nearly continuous exposures made it possible determine relative stratigraphic position sites. With succession as directive proved follow evolution Cricetodontinae step step. Cricetodon material found region falls into four groups. Within each group species closely related. 1. minor (based on LARTET, 1851) comprises with elongated M1. oldest member this primitivus n. ssp. Valtorres locality near Calatayud. form develops C. collongensis MEIN, 1958, Vieux-Collonges (France). author considers subspecies LARTET. was several Spanish localities. evolutionary development appears LARTET one side gregarius SCHAUB, 1925 other. Representatives branches Calatayud-Daroca region. In course time members branch grow gradually larger, whereas they stay about size. 2. larteti 1925) medium molars short broad, squarishly built, show definite reduction. early middle ancestors now Spain, namely koenigswaldi n.sp. darocensis most notable feature trend gradual increase 3. affinis squat little brevis SCHAUB synonymous affinis. type specimen La Grive-St. Alban (France) considered Sansan, being markedly different above mentioned, had better named cf. vindoboniensis & ZAPFE, 1953. It fairly certain that Villafeliche II A (Spain) identical latter. 4. sansaniensis species. have high relief fat cusps. Only (Manchones) provided sufficient for analysis. Comparison finds France North-Spain led conclusion there two lines within group. These probably related, though common ancestor not yet known. One leads meini (from Vieux-Collonges) through somewhat more highly developed Manchones) decedens Alban, Valles-Penades). other branch, which also known Vieux-Collonges, described, Sansan. Grive seems might well called rhodanicus DEPERET. highest Valles-Penades (not described). mentioned data trends tried correlate some well-known sites (fig. 17). There good agreement between miocene Spain France, no similarity North-African Beni-Mellal (Morocco). living Cricetus cricetus canescens NEHRING Mesocricetus auratus (WATERHOUSE) Western Europe shows none these can an recent Cricetinae. Certain primitive characters dentition already disappeared all oligocene genus Cricetops Mongolia only or less satisfies demands should theoretically make probable Cricetinae originally Asiatic family, arriving at Hipparion crowding out least Oligocene age.