We describe a new species of extinct riodinid butterfly, Voltinia dramba, from Oligo-Miocene Dominican amber (15-25 Myr ago). This appears to be the first butterfly to be taxonomically described from amber, and the first adult riodinid fossil. The series of five specimens represents probably the best-preserved fossil record for any lepidopteran. The phenomenon of extant Voltinia females oviposi...

Diospyros is a large genus of woody flowering plants with predominantly subtropical and tropical modern distribution. Fossils attributed to are mainly leaf impressions from Cretaceous Cenozoic strata across the Northern Hemisphere. However, it difficult assign such fossils because genus-diagnostic characteristics remain be identified. Unequivocal fossil records few, including staminate flowers ...

Analyses of molecular phylogenies of three unrelated tropical marine gastropod genera, Turbo, Echinolittorina, and Conus, reveal an increase in the rate of cladogenesis of some Indo-West Pacific (IWP) clades beginning in the Late Oligocene or Early Miocene between 23.7 and 21.0 million years ago. In all three genera, clades with an increased rate of diversification reach a maximum of diversity,...

assessment of the reservoir structure and determination of theinsitu stress direction arenecessary in oil production optimization andfield development. today, the application of reservoir software and image logsplay a central role in resolving this problem. electricand ultrasonic imaging tools record vast amounts of high-resolution data within the borehole wall. this enables the geoscientists t...