The Cambrian outcrops within the Zafra-Alanís Domain, southwest Iberia contain the type localities of several trilobite genera, including Alanisia , Saukianda , Perrector , Eops , Andalusiana , Protaldonia , and nine trilobite species. These fossils are attributed to the Marianian regional Stage, spanning from the upper Stage 3 to the lower Stage 4 of Cambrian Series 2. Despite their significance, the biostratigraphy of these...

Marianian (Cambrian Series 2) trilobites from the area between Totanés and Noez (Central Iberian Zone) are described and their biostratigraphical significance is discussed. The trilobites come from eight localities and can be divided into two main assemblages: the first is characterised by Serrodiscus bellimarginatus , Chelediscus cf. garzoni , Atops calanus , Pseudatops reticulatus and indeterminate polymeroid trilobites. The...