We describe an extensive ichnofossil assemblage from the likely Cenomanian-age 'lower' and 'upper' units of the 'Kem Kem beds' in southeastern Morocco. In the lower unit, trace fossils include narrow vertical burrows in cross-bedded sandstones and borings in dinosaur bone, with the latter identified as the insect ichnotaxon Cubiculum ornatus. In the upper unit, several horizons preserve abundan...

Dakotasaurus gilletorum Nydam 2013 was erected for two partial mandibles of a paramacellodid-cordylid grade scincomorphan lizard from the early Late Cretaceous (Cenomanian) of southern Utah (Nydam 2013). However, the genus name Dakotasaurus is a junior homonym of the ichnofossil Dakotasaurus Branson and Mehl 1932. Under Article 23.1 of the International Code of Zoological Nomenclature (ICZN 199...

Porto Primavera geosite comprises aeolian sandstones with tetrapod trace fossil cropping out at the Hydroelectric Power Plant, São Paulo State, Brazil. The Upper Cretaceous Rio Paraná Formation, which contains these tracks, is composed of medium–fine quartzarenites well- sorted and supermature, typically large tabular/trough cross-bedding. They accumulated in complexes barchanoid dunes, moved b...

Orbitally controlled, sedimentary cycles of the Newark Supergroup permit palyniferous Late Triassic sections to be calibrated in time. Carnian palynofloras from · the Richmond basin exhibit 2-m.y. fluctuations in the spore/pollen ratio, but taxonomic composition remains stable. Diversity of Norian and Rhaetian palynofloras increases prior to a 60% reduction at the Triassic/Jurassic boundary. Th...

The Lower Jurassic Navajo Sandstone of northern Arizona and southern Utah has yielded a diverse assemblage of late Early Jurassic terrestrial tetrapods from eolian and associated paleoenvironments. Although rare, vertebrate body fossils are represented by specimens of tritylodonts, crocodylomorphs, sauropodomorphs, and basal theropods (including Segisaurus halli). The vertebrate ichnofossil rec...

An enrolled exoskeleton of the holaspid specimen of a tiny agnostid Peronopsis integra (BEYRICH, 1845) entombed inside a conch of the hyolithid ?Buchavalites sp. is described from the middle Cambrian (Drumian) Jince Formation of the Příbram-Jince Basin (Czech Republic). The agnostid is associated with an ichnofossil of the feeding trace classified as Arachnostega-type behaviour. The enrolled at...