Abstract: The brachiopods Plicatifera sp., Kozlowskia capaci, Linoproductus sp. cf. L. eastoni, Composita sp cf. C. sp. cf. subtilita, Anthracospirifer occiduus (Sadlick, 1960), Hustedia mormoni (Marcou, 1858), and Reticulariina sp., are described for the Late Paleozoic of Sierra Agua Verde, Sonora from the La Joya formation, which is made of limestone, sandy limestone, and chertly limestone, and irregular sandstone and siltstone interbeded. The associated biota includes algae, foraminifers, sponges, corals, bryozoan, gastropods, and crinoids that suggest environmental conditions of carbonate platforms with normal salinity and fluctuating levels of energy and nutrient availability. The distribution analysis of the brachiopods allows to establish the palaeogeographic relationships with fauna of Mexico (Oaxaca, Hidalgo), USA (Idaho, Wyoming, Nebraska, Nevada, Ohio, Kansas, Utah, Missouri, Pennsylvania, Arizona, New Mexico, and Texas), Canada, South America (Bolivia, Peru), Europe (Ireland, Belgium), and Asia (Russia, China, Japan, Indonesia). | Resumen: Se describen para el Paleozoico tardío de la sierra Agua Verde, Sonora, los braquiópodos Plicatifera sp., Kozlowskia capaci, Linoproductus sp. cf. L. eastoni, Composita sp. cf. C. subtilita, Anthracospirifer occiduus (Sadlick, 1960), Hustedia mormoni (Marcou, 1858) y Reticulariina sp., procedentes de la formación La Joya, que está conformada por caliza, caliza arenosa y caliza con pedernal, e intercalaciones irregulares de arenisca y limolita. La biota asociada incluye algas filoides, foraminíferos, esponjas, corales, briozoos, gasterópodos y crinoides que sugieren condiciones ambientales de plataforma carbonatada somera, con salinidad normal y niveles fluctuantes de energía y disponibilidad de nutrientes. El análisis de la distribución de los braquiópodos permitió establecer relaciones paleogeográficas con fauna de México (Oaxaca, Hidalgo), EUA (Idaho, Wyoming, Nebraska, Nevada, Ohio, Kansas, Utah, Missouri, Pensilvania, Arizona, Nuevo México y Texas), Canadá, América del Sur (Bolivia, Perú), Europa (Irlanda, Bélgica) y Asia (Rusia, China, Japón, Indonesia).

The bioerosion trace fossils are described from the Pliocene cropping out at the Agua Amarga Subbasin (Betic Cordillera, Almería Province, SE Spain). They are associated with limestone clasts (pebbles and cobbles) and molluscs constituting a shallow marine conglomerate and an overlying composite shell bed that were deposited in a shallow marine setting. The ichnotaxa include borings produced by sponges (Entobia cateniformis, E. geometrica, E. laquea, E. form A and E. form B), bivalves (Gastrochaenolites torpedo, and G. lapidicus) and polychaete annelids (Caulostrepsis taeniola, Meandropolydora ?decipiens, M. cf. elegans, and M. cf. sulcans). Encrustations by bryozoans and tube annelids are also present. The bioerosion trace fossils assemblages from the conglomerate and the shell bed can be ascribed to the Entobia subichnofacies, which is typical of Neogene rocky-shore settings. Bioerosion analysis allows improved interpretation of palaeoenvironmental (ecological and depositional) conditions i.e. hydrodynamic energy, rate of sedimentation, and exposure time, in the Agua Amarga Subbasin during the Pliocene.