Late Mesozoic palaeobiogeography has been characterized by a distinction between the northern territories of Laurasia and the southern landmasses of Gondwana. The repeated discovery of Gondwanan lineages in Laurasia has led to the proposal of alternative scenarios to explain these anomalous occurrences. A new biogeographical model for late Mesozoic terrestrial ecosystems is here proposed in whi...

This paper discusses the phyletic interpretation of the genus Phricodoceras and its taxonomic classification at the subfamily, family, and superfamily levels from an historical and critical perspective. First a review of the latest findings on this taxon is presented and the grounds for the attribution of Phricodoceras to the Schlotheimiidae (Psiloceratoidea) are summarized and illustrated. Thi...

The oldest reported occurrence of cryptospores supposed to derive from land plants (embryophytes) is currently considered be in the Middle Ordovician. two genera Virgatasporites and Attritasporites, described 1960ʹs Early Ordovician (Tremadocian) Algeria, are morphologically close miospores, therefore pose a dilemma, because these spore-like microfossils recorded before first appearance plant d...

The Campanian Anacleto Formation holds an abundant and diverse ichnofossil body-fossil vertebrate record. Despite the striking diversity of this record, pterosaur fossils had never been described from unit. Here, we report four manus tracks fluvial red beds cropping out in Área Natural Protegida Municipal Paso Córdoba (Río Negro Province, northern Patagonia, Argentina). Tracks are longer than w...