Abstract Abstract: The first pterosaur bone bed from Brazil was reported in 2014 at the outskirts of the town Cruzeiro do Oeste, Paraná State, in the Southern region of the country. Here named 'cemitério dos pterossauros' site, these outcrops were referred to the Goio-Erê Formation (Turonian-Campanian) of the Caiuá Group (Bauru Basin) and revealed the presence of hundreds of isolated or partially articulated elements of the tapejarine pterosaur Caiuajara and fewer amounts of a theropod dinosaur. Here we present a new tapejaromorph flying reptile from this site, Keresdrakon vilsoni gen. et sp. nov., which shows a unique blunt ridge on the dorsal surface of the posterior end of the dentary. Morphological and osteohistological features indicate that all recovered individuals represent late juveniles or sub-adults. This site shows the first direct evidence of sympatry in Pterosauria. The two distinct flying reptiles coexisted with a theropod dinosaur, providing a rare glimpse of a paleobiological community from a Cretaceous desert.

A paleoflora da Formação Crato é uma das poucas floras equatoriais do Cretáceo Inferior. É diversificada, com muitas angiospermas, especialmente representantes dos clados magnoliids, monocotiledôneas e eudico-tiledôneas, confirmando a hipótese de que a diversidade das angiospermas durante a última parte do Cretáceo Inferior era ralativamente alta. A morfologia de uma nova mocotiledônea fóssil é estudada e comparada com outros gêneros de Smilacaceae, especialmente a venação. Cratosmilax jacksoni n. gen. n. sp. pode ser relacionada com a família Smilacaceae, tornando-se o registro mais antigo da família, até então. Cratosmilax jacksoni consiste de uma única folha mesófila com margem inteira, ovada, com ápice e base agudos, quatro ordens de venação e veias principais acródromas. É a primeira monocotiledônea terrestre descrita para a Formação Crato, monocotiledôneas foram anteriormente descritas para a mesma formação, e são consideradas aquáticas. Cratosmilax jacksoni é o primeiro registro fóssil da família Smilacaceae no Brasil, e o registro mais antigo desta família.

The Crato Formation paleoflora is one of the few equatorial floras of the Early Cretaceous. It is diverse, with many angiosperms, especially representatives of the clades magnoliids, monocotyledons and eudicots, which confirms the assumption that angiosperm diversity during the last part of the Early Cretaceous was reasonably high. The morphology of a new fossil monocot is studied and compared to all other Smilacaceae genus, especially in the venation. Cratosmilax jacksoni gen. et sp. nov. can be related to the Smilacaceae family, becoming the oldest record of the family so far. Cratosmilax jacksoni is a single mesophilic leaf with entire margins, ovate shape, with acute apex and base, four venation orders and main acrodromous veins. It is the first terrestrial monocot described for the Crato Formation, monocots were previously described for the same formation, and are considered aquatics. Cratosmilax jacksoni is the first fossil record of Smilacaceae in Brazil, and the oldest record of this family.