To discern the effect of the end-Permian (P-Tr) ecological crisis on land, interactions between plants and their insect herbivores were examined for four time intervals containing ten major floras from the Dolomites of northeastern Italy during a Permian-Triassic interval. These floras are: (i) the Kungurian Tregiovo Flora; (ii) the Wuchiapingian Bletterbach Flora; (iii) three Anisian floras; a...

Abstract To help resolve current controversies surrounding the fundamental question of synchrony between end-Permian mass extinction on land and in sea, we examined marine Permian–Triassic reference section at Meishan (southeastern China) for land-derived molecular degradation products pentacyclic triterpenoids with oleanane carbon skeletons, diagnostic Permian plant genus Gigantopteris. We ide...

A large collection of the trace fossil Rhizocorallium from Middle Triassic Polish part Germanic Basin (Peri-Tethys) is analysed and their ichnotaxonomical classification presented. Special attention given to deep form with a vertical retrusive spreite, filled faecal pellets, detailed documentation this structure, based on isolated specimens serial sections. This analysis also reveals ∩-shaped d...

Mesozoic marine reptiles and modern marine mammals are often considered ecological analogs, but the extent of their similarity is largely unknown. Particularly important is the presence/absence of deep-diving suction feeders among Mesozoic marine reptiles because this would indicate the establishment of mesopelagic cephalopod and fish communities in the Mesozoic. A recent study suggested that d...

This paper presents a new interpretation of the geometry of Triassic alignment of J. Sidi Mahdi –J. Zitoun in Medjerda Valley Plain (Northern Tunisia) based on detailed analysis of gravity and seismic reflection data. The main results of gravity analysis do not show a distinguish gravity anomaly over Triassic evaporites bodies. The positive gravity anomaly seems to be related to the entire stru...

—Mesozoic marine ecosystems were dominated by several clades of reptiles, including sauropterygians, ichthyosaurs, crocodylomorphs, turtles, and mosasaurs, that repeatedly invaded ocean ecosystems. Previous research has shown that marine reptiles achieved great taxonomic diversity in the Middle Triassic, as they broadly diversified into many feeding modes in the aftermath of the Permo-Triassic ...