A new crocodyliform from the Upper Cretaceous (Campanian-Maastrichtian) Presidente Prudente Formation of the Bauru Group is described based on two almost complete skulls and mandibles. The material comes from the "Tartaruguito" site, situated at an old railroad between the cities of Pirapozinho and Presidente Prudente, state of São Paulo, Brazil. The new species, Pepesuchus deiseae gen. et sp. nov., is classified in the clade Peirosauridae on the basis of three synapomorphies: the presence of five premaxillary teeth, the anterior two premaxillary alveoli nearly confluent, and the oval cross-section of the jugal along the lower temporal bar. The new taxon increases the outstanding crocodyliform diversity of the Bauru Group, particularly of the Peirosauridae, which might turn out to be one of the most representative clades of gondwanan mesoeucrocodylians.

A new spinosaurid taxon, Oxalaia quilombensis gen. et sp. nov., is described based on the anterior part of a snout and a fragment of a maxilla. These specimens were collected at the Laje do Coringa site, Late Cretaceous (Cenomanian) of the São Luis Basin. Unlike Cristatusaurus and Suchomimus, Oxalaia quilombensis lacks serrations on the teeth. The new species differs from Angaturama limai by having the anterior part of the premaxillae more expanded and by lacking a sagittal premaxillary crest. It further differs from Spinosaurus cf. S. aegyptiacus and the Algerian spinosaurid by the rounder shape of the terminal expansion. Furthermore, Oxalaia quilombensis has one functional tooth followed by two replacement teeth, a feature not previously observed in theropods. Oxalaia quilombensis appears to be more closely related to the spinosaurids found in North Africa than to the Brazilian members of this clade and thus further increases the diversity of these enigmatic predatory dinosaurs in this country.

A new mesoeucrocodylian (Crocodyliformes) is described from the Laje do Coringa site, earliest Late Cretaceous (early Cenomanian) of the São Luís Basin, northeastern Brazil. Due to the likely hetorodonty indicated by distinct alveoli shapes, Coringasuchus anisodontis gen. et sp. nov. is tentatively referred to the Notosuchia and distinguished from other members of this clade by the presence of obliquely implanted teeth with the main axis directed anterolingually-toposterolabially and the presence of alveoli that are distinctively raised above the level of the dorsal margin of the dentary. The material further confirms the interpretation that the fossil concentration of the Laje do Coringa site is the result of multiple reworking events from previous deposits, but the degree of time-averaging was possibly higher than previously suspected.

The genera Nuculites and Cucullella have originated in different geographic areas, with the oldest record found in the Llandovery (Lower Silurian). The former was reported in Gondwana with two subgenera, Nuculites and Trilobonuculites, while the latter is found in Avalonia. Due to environmental and tectonic factors, those taxa became associated and distributed throughout Gondwana, Avalonia, Kazakhistan and Laurussia from the Late Silurian to the Late Devonian. The subgenus Trilobonuculites appeared firstly at the Pitinga Formation, Amazon Basin, Brazil, and the subgenus Nuculites is only recorded in the Silurian from the Tabuk Formation, Saudi Arabia. Cucullella was found in the Ross Brook Formation of New Scotia, Canada. Since the Late Silurian (Ludlow), which is marked by a marine transgression, Trilobonuculites and Cucullella started to occur associated, invading other paleocontinents, confirmed by the presence of Cucullella in the Gondwana (Bolivia) and Trilobonuculites in Avalonia (New Scotia). This suggests that the environment in these areas became more uniform due to the rise of the sea level and the narrowing of the ocean Rheic. The Silurian-Devonian boundary is marked by a marine regression followed by a new transgression, with maximum in the Frasian, and the collision of Avalonia/Baltica and Laurentia forming Laurussia. At this point, the subgenus Nuculites reappeared. Still in the Lower Devonian (Pragian-Emsian), the genus Nuculites diversified, dominating by the subgenus Trilobonuculites, while Cucullella was only represented by a sole species from Kazakhistan. In the Middle Devonian (Eifelian-Givetian) the subgenus Nuculites predominated while Trilobonuculites was restricted to the Maecuru Formation (Brazil). The only species of Cucullella dispersed to the oriental Laurussia and North and Occidental Gondwana. In the Late Devonian (Frasnian), the occurrence of these taxa was restricted to the Armorican Massif, Northeastern of Brazil and some doubtful occurrences in Bolivia. At that time, the oceans deepened, dysaerobic and anoxic environments spread out and Gondwana and Laurussia were approaching. These factors, associated with thermal stress, led to extinction of several taxa at the Frasnian/Fammenian boundary, including those studied here. The paleogeographic distribution of Nuculites and Cucullella agrees with the sea level curves and the movement of the continents suggested to have taken place during the Silurian and Devonian.-(

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