Mysticeti (baleen whales) and Odontoceti (toothed whales) today greatly differ in their hearing abilities: Mysticeti are presumed to be sensitive to infrasonic noises [1-3], whereas Odontoceti are sensitive to ultrasonic sounds [4-6]. Two competing hypotheses exist regarding the attainment of hearing abilities in modern whales: ancestral low-frequency sensitivity [7-13] or ancestral high-freque...

The genus Protochrysis (type species P. succinalis Bischoff, 1916, by monotypy) was established by Bischoff (1916: 139) for distinctive fossil insect remains of Eocene (Lutetian) age from the former Königsberg outskirts of East Prussia (now Kalinigrad, Russian Federation), referred at present to the Chrysididae (Hymenoptera) (Brues 1933; Carpenter 1985, 1992). However, an identical generic name...

This study investigated the bioreceptivity of two Lutetian limestones (Courville and Ditrupa), mainly used in north-eastern region France, their restoration stone (Savonnieres). Samples three stones were exposed outdoor for 2.5 years to determine if replacement by Savonnieres was relevant regarding intrinsic properties susceptibility microbial colonisation. Cultivation assays revealed presence ...

Abstract The pan-sirenian Bauplan is conservative, probably owing to the constraints of adaptation an aquatic lifestyle. Gathering morphological data from extinct forms complex, resulting in poorly resolved phylogenies for stem pan-sirenians. Extant sirenians ossify falx cerebri and tentorium cerebelli, membranes dura mater brain attached parietal bone. Nevertheless, these ossifications are not...