This work is focused on systematic research of cephalopod jaws from the Late Cretaceous. Samples of 147 newly recorded nautiloid rhyncholites from the Bohemian Cretacoeus Basin and one new ammonite rhyncholite from Řepov village were systematically analyzed. The new collection of lower ammonite jaws (aptychi) consists of 32 specimens. Nautiloid rhyncholites from localities Turkaňk, Úpohlavy, and Dreisen were determined as Nautilorhynchus simplex. Conchorhynchs from locality Vinary u Vysokého Mýta belong to the species Conchorhynchus cretaceous, which is associated with the commonmost species Eutrephoceras sublaevigatum. Ammonite rhyncholite is left in the open nomenclature due to its uncertain systematic position and it is not assigned to any ammonite species. Records of aptychi from the locality of Úpohlavy and Pecínov represent mainly species of heteromorphic ammonites - baculitids (Baculites, Sciponoceras). The total diversity of species from both localities reaches 20 ammonite species. The two jaw morphotypes (2 species of aptychi) are reported from the Bohemian Cretaceous Basin for the first time herein. Of the high importance, it is a record of ammonite Prionocyclus germari from Úpohlavy with associated lower jaws in situ within the body chamber. Aptychus of this taxon has never been...

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / In this work were analyzed the Spatangoids Echinoids of the species Mecaster batnensis (Coquand, 1862), Mecaster fourneli (Agassiz & Desor, 1847) and Mecaster africanus (Coquand, 1862) from the Sergipe sub-basin of the Fundação Paleontológica Phoenix collection. Among the specimens studied, there were found exemplars of the species Mecaster texanus (Roemer, 1849), that were recorded for the first time in the Sergipe Cretaceous. It was observed that the species M. batnensis and M. africanus, distributed from the Cenomanian to the Turonian showed a lower number of pore pars in the ambulacra III when compared to the others Mecaster species in this same interval. This data could indicate that this species lived in lower depths in the sediment, since the podia of those pores would be sparser. On the other hand, M. fourneli and M. texanus distributed between the Turonian and Coniacian showed a higher number of pore pairs in the ambulacra III, what could indicate that these species lived at more profound depths in the sediment and their contacts with the water-sediment interface through the podia were more effective. All the Mecaster species were present at the basin during the Turonian where they had occupied different habitats, M. batnensis and M. africanus on the other hand would search more profound places where they would live borrowed closer to the water-sediment interface and protected from predators. M. fourneli and M. texanus would prefer shallow environments where they would ride from their predadors burrowed deeply in the sediment. / Neste trabalho foram analisados os equinoides espatangoides Mecaster batnensis (Coquand, 1862), Mecaster fourneli (Agassiz & Desor, 1847) e Mecaster africanus (Coquand, 1862) provenientes da sub-bacia de Sergipe e depositados nas coleções de Invertebrados fósseis da Fundação Paleontológica Phoenix. Entre os espécimes estudados foram encontrados exemplares de Mecaster texanus (Roemer, 1849) sendo esta espécie registrada pela primeira vez para o Cretáceo de Sergipe. Foi observado que as espécies Mecaster batnensis e M. africanus distribuídos do Cenomaniano ao Turoniano apresentaram um número menor de pares de poros no ambulacro III do que as demais espécies neste mesmo intervalo, o que poderia indicar que teriam tido a capacidade de se enterrar a uma menor profundidade no sedimento, já que os pódios destes poros seriam mais espaçados. As espécies Mecaster fourneli e M. texanus foram distribuídas entre o Turoniano e o Coniaciano e apresentaram um maior número de pares de poros no ambulacro III, podendo indicar que estas espécies teriam se enterrado mais profundamente e seu contato com a interface água/sedimento através dos pódios mais efetivo. Todas as espécies de Mecaster estiveram presentes na bacia durante o Turoniano, onde teriam ocupado habitat distinto. Enquanto Mecaster batnensis e M. africanus teriam procurado locais talvez mais profundos onde teriam vivido enterrados mais próximo da interface sedimento/água e afastados de prováveis predadores, M. fourneli e M. texanus teriam preferido ambientes mais rasos onde teriam driblado seus predadores se enterrando mais profundamente no sedimento.