Invertebrate trace fossils from the Upper Jurassic of Portugal

Twelve genera and ten species of trace fossils, including Polykladichnus irregularis gen. et sp. nov. and Psilonichnus tubiformis gen. et sp. bed from the Upper Iurassic (Kimmeridgian/Portlandian) of the Lusitanian Basin (Central Portugal). They repr acr (1967) a - SRortnos-, and, exhibit a similar distribution pattern as elsewhere in the Jurassic. Most of them thus aperior (Kimeridgiano-Portlandiano) da Bacia do centro d