A new genus and species of ornithomimosaur, Afromimus tenerensis, is described based on a fragmentary skeleton from the Lower Cretaceous (Aptian–Albian) El Rhaz Formation of Niger. The holotype and only known individual preserves caudal vertebrae, chevrons and portions of the right hind limb. Derived ornithomimosaurian features include the broad, peanut-shaped articular surfaces of mid caudal c...

Pterosaur remains from the Río Belgrano Formation, Santa Cruz Province, Argentina, were found close to the Estancia Río Roble, along with several ammonoids that indicate a Barremian age for those strata. The specimens (MACN-SC 3617) consist of one ulna and one element tentatively identified as a portion of a wing metacarpal. The ulna shows morphological affinities with the Pteranodontoidea (sen...

The first megaspores recovered from Ukrainian Lower Cretaceous strata are described and illustrated by reflected light scanning electron micrography. Four lycopsid megaspore taxa identified in core samples north of Kherson (Khersons'ka Oblast), the Black Sea Basin, southern Ukraine. Miospore assemblages same reveal a slightly higher diversity microspores and, conjunction with previous foraminif...

Large perturbations in the global carbon cycle recorded as carbon-isotope (?13C) excursions (CIEs) both organic and carbonate records have been linked to volcanism during emplacement of Igneous Provinces (LIPs). This link is based primarily on purported temporal coincidence between CIEs LIP emplacement. Mercury (Hg) concentration sedimentary rocks has used a regional tracer large-scale volcanic...