نتایج جستجو برای: late barremian
تعداد نتایج: 195650 فیلتر نتایج به سال:
The world of 120 million years ago was one of dynamic biological processes. During that time the flowering plants emerged as the dominant global floristic element, a transformative event that ultimately altered the character of the entire planet. Understandably, the rapid rise of angiosperms has intrigued paleoecologists and evolutionary biologists, who have strived to elucidate underlying expl...
Acknowledgements: The author gratefully acknowledges the support of the European Community given under MAST 2 contract CT92–0015.
As we move to developing object-oriented programs, the complexity traditionally found in functions and procedures is moving to the connections among components. Different faults occur when components are integrated to form higher level structures that aggregate behavior and state. Consequently, we need to place more effort on testing the connections among components. Although object-oriented te...
Knowledge regarding the early evolution within the dinosaurian clade Ankylopollexia drastically increased over the past two decades, in part because of an increase in described taxa from the Early Cretaceous of North America. These advances motivated the recent completion of extensive preparation and conservation work on the holotype and only known specimen of Dakotadon lakotaensis, a basal ank...
Abstract Squat lobsters within Galatheoidea are very diverse with over 1,300 extant species that live in all marine ecosystems, but their fossil record, starting the Middle Jurassic, consists of only ~200 species. Consequently, much remains to be learned about biodiversity, phylogeny, and paleobiogeography. We describe five new ( Galatheites sforum n. sp., Kimmeridgian, Late Germany; Vasconilia...
A new family of stephanoid wasps is established based on Cretaceous amber inclusions and rock imprints. Ohlhoffiidae fam. nov. comprises four species in three genera: Ohlhoffia robusta gen. et sp. nov., Myanmephialtites bashkuevi which are newly described figured from mid-Cretaceous northern Myanmar; Cretephialtites pedrerae Rasnitsyn & Ansorge, 2000, C.(?) hispanicus (Rasnitsyn Martínez-Delclò...
Abstract The facies and clay mineral study of clay/marl-rich levels from the Torrelapaja Formation (latest Hauterivian–early Barremian, NW Iberian Range, NE Spain) allowed to establish palaeoclimatic palaeoenvironmental conditions under they were generated. muddy pisoids contained therein two logs sampled studied by X-ray diffraction optical electron microscopy. A similar mineralogical upwards ...
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