Abstract
A dark-coloured trace fossil assemblage from the Cretaceous/Palaeogene (K/Pg) boundary interval in the Agost section (Betic Cordillera, south-east Spain) has been examined. These trace fossils, of early Danian age, are located within host Plummerita hantkeninoides Biozone (Late Maastrichtian) sediments. The assemblage consists of Chondrites ? targionii, Zoophycos isp., Planolites isp. (two size classes), ? Thalassinoides isp. A, T. isp. B, T. isp. C, Alcyonidiopsis longobardiae, and Diplocraterion ? parallelum. The latter two species are described here for the first time within K/Pg boundary intervals. Major differences in trace-fossil composition between the Agost and other K/Pg boundary sections (Denmark, Alabama and north-east Mexico) can be related to palaeoenvironmental factors, mainly reflecting the more distal and deeper environment of the Agost section.
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