Abstract The study on Silurian-Devonian conodonts from the Precordillera has shown a significant increase in last 5 years. In new conodont collections, particular specimens of Ozarkodina were obtained middle and upper parts Los Espejos Formation Talacasto region. taxonomic allows us to propose species genus Ozarkodina, named huenickeni sp. nov., which shows three different morphotypes, ?, ? ?, ...

Constraining the age of formation and repeated movements along fault arrays in superimposed rift basins helps us to better unravel kinematic history as well role inherited structures basin evolution. The Inner Moray Firth Basin (IMFB, western North Sea) overlies rocks Caledonian basement, pre-existing Devonian–Carboniferous Orcadian Basin, a regionally developed Permo–Triassic Sea system. IMFB ...

The oldest preserved visual systems are to be found in the extinct trilobites, marine euarthropods which existed between about 520 and 250 million years ago. Because they possessed a calcified cuticle, they have a good fossil record, and commonly the lens-bearing surfaces of their paired compound eyes are well preserved. The sublensar structures, however, remain unknown. Three kinds of eyes hav...

The stratifi ed red beds of the Catskill Formation are conspicuous in road cut exposures on the Allegheny Plateau of north-central Pennsylvania. During this fi eld trip we will visit and explore several fossil localities within the Catskill Formation. These sites have been central to recent investigations into the nature of Late Devonian continental ecosystems. By the Late Devonian, forests wer...

Two new mitrate stylophorans are described from the upper part of Santa Rosa Formation (Lochkovian) in Central Subandean Zone Bolivia and Jupiter (Cybèle Member, late Llandovery) Anticosti Island (Canada). Both identified as allanicytidiine anomalocystitids. The Bolivian mitrate, Perikefalea racheboeufi gen. sp. nov. is characterized by a strongly reduced number plates (five) on its thecal surf...