RT Journal Article T1 Precisiones sobre la sistemática de Iberomys Chaline, 1972 (Arvicolidae, Rodentia, Mammalia) del Pleistoceno inferior de la Sierra de Atapuerca (Burgos, España) T1 On the systematics of Iberomys Chaline, 1972 (Arvicolidae, Rodentia, Mammalia) from the Lower Pleistocene of the Sierra de Atapuerca (Burgos, España) A1 Laplana, César A1 Cuenca Bescós, G. AB The Iberomys lineage is represented by the species I. huescarensis (Ruiz Bustos, 1988), at the lower levels (TD3 to lower TD8) of Trinchera Dolina (Sierra de Atapuerca, Burgos), and not by I. brecciensis Ciebel, 1847 as stated previously. Both species mainly differ in the communication of triangles T4 and T5 of the first lower molar dental pattern, broad in I. huescarensis and narrow in I. brecciensis. I. huescarensis is the ancestral species of the I. brecciensis-cabrerae lineage, and characterizes the late Lower Pleistocene and the transition Lower-Middle Pleistocene in the Iberian Peninsula PB Sociedad Geológica de España YR 1997 FD 1997 LK http://hdl.handle.net/10272/10326 UL http://hdl.handle.net/10272/10326 LA spa DS Repositorio Institucional de la Universidad de Huelva RD 30 may 2026