A5019802773- Echinoderm biology and ecology
- Paleontology and Stratigraphy of Fossils
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Geological formations and processes
- Spacecraft and Cryogenic Technologies
- Geological and Geophysical Studies
- Marine Bivalve and Aquaculture Studies
- Plant Diversity and Evolution
- Hedgehog Signaling Pathway Studies
- Pleistocene-Era Hominins and Archaeology
- Geological Studies and Exploration
- Diatoms and Algae Research
- Cephalopods and Marine Biology
- Marine and environmental studies
- Ocean Acidification Effects and Responses
- Amphibian and Reptile Biology
- Genetic and rare skin diseases.
- Geological and Geochemical Analysis
- Mediterranean and Iberian flora and fauna
Bayerische Staatssammlung für Paläontologie und Geologie
2016-2023
Ludwig-Maximilians-Universität München
2014-2023
Staatliches Naturhistorisches Museum
2021-2023
Genentech
2023
Bavarian State Collection of Zoology
2014-2021
Bavarian Natural History Collections
2019-2020
University of Göttingen
2005-2014
North Dakota State University
2014
Universität Greifswald
2001
Background Archosaurs (birds, crocodilians and their extinct relatives including dinosaurs) dominated Mesozoic continental ecosystems from the Late Triassic onwards, still form a major component of modern (>10,000 species). The earliest diverse archosaur faunal assemblages are known Middle (c. 244 Ma), implying that radiation began in Early (252.3–247.2 Ma). Understanding this is currently limited by poor early fossil record group terms skeletal remains. Methodology/Principal Findings We...
The signatories of this letter request significant changes to the common practices in palaeontology.With our present, multi-authored comment, we aim argue why these suggestions will not lead improvement both practice and ethics palaeontological research but, conversely, hamper its further development.Although disagree with most contents SVP letter, appreciate initiative discuss scientific underlying ethics.Here, consider different aspects by Rayfield et al. ( 2020) which see weaknesses dangers.
Abstract Purpose: Inappropriate activation of the Hedgehog (Hh) signaling pathway in skin is critical for development basal cell carcinomas (BCC). We have investigated anti-BCC efficacy topically-applied CUR61414, an inhibitor Hh signal transduction molecule Smoothened. Experimental Design: In preclinical studies, we used a depilatory model to evaluate ability topical formulations CUR61414 repress responsive cells found at base hair follicles normal skin. also tested vivo effects on murine...
The origin and possible antiquity of the spectacularly diverse modern deep-sea fauna has been debated since beginning research in mid-nineteenth century. Recent hypotheses, based on biogeographic patterns molecular clock estimates, support a latest Mesozoic or early Cenozoic date for key groups present (echinoids, octopods). This relatively young age is consistent with hypotheses that argue extensive extinction during Jurassic Cretaceous Oceanic Anoxic Events (OAEs) mid-Cenozoic cooling...
Abstract The palaeobiogeographical distribution of the six major clades Ordovician echinoderms (asterozoans, blastozoans, crinoids, echinozoans, edrioasteroids and stylophorans) is analysed based on a comprehensive up-to-date database compiling 3701 occurrences (1938 species recorded from 331 localities) both complete specimens isolated ossicles. Although historically biased towards limited number regions (Europe, North America, Russia), resulting dataset makes it possible to identify main...
The northern German Lower Cretaceous Bückeberg Formation yields numerous dinosaur tracksites, some of which have produced material impressive quality. Stratigraphically, the localities are concentrated in Obernkirchen Sandstone, a thin subunit within this formation. Sandstone represents mainly sandy barrier to back-barrier and lagoonal setting limnic deltaic facies complex, was deposited during late Berriasian (Cypridea alta formosa ostracod subzone) southeast Saxony Basin, northwest...
Abstract Deuterostomes are a morphologically disparate clade, encompassing the chordates (including vertebrates), hemichordates (the vermiform enteropneusts and colonial tube-dwelling pterobranchs) echinoderms starfish). Although deuterostomes considered monophyletic, inter-relationships between three clades remain highly contentious. Here we report, Yanjiahella biscarpa , bilaterally symmetrical, solitary metazoan from early Cambrian (Fortunian) of China with characteristic echinoderm-like...
Abstract With 1429 animal species, the Triassic Cassian Formation in Dolomites, Southern Alps (Italy), yields highest species richness reported from any spatially constrained pre‐Quaternary formation known to science. The high preserved diversity is partly attributable a primary governed by tropical setting, increasing alpha diversity, and breadth of habitats spurring beta diversity. More important excellent preservation fossils ease with which they can be extracted poorly lithified...
Abstract Two genera of tylosaurine mosasaurs, Tylosaurus and Hainosaurus , are recorded for the first time from Germany. sp. is represented by two isolated tooth crowns, originally described as Mosasaurus ? alseni (here considered a nomen dubium ) latest Santonian–Early Campanian, which very similar to T. ivoensis gaudryi . The material comprises maxillary with associated postorbitofrontal, pterygoid teeth several indeterminate cranial fragments. specimen Late Campanian slightly less derived...
Metatetrapous valdensis Nopcsa, 1923 from the late Berriasian of northwestern Germany was first dinosaur ichnotaxon ever attributed to a thyreophoran trackmaker. However, subsequent lost original material made this identification and status questionable for many authors. This situation aggravated by fact that there are only very brief descriptions accompanied single drawing. A reconsideration description recognizes M. as valid ichnotaxon, which, albeit showing great resemblance in pes...
Abstract: Echinoid teeth are without doubt the most complex and highly specialized skeletal component to have evolved in echinoderms. They biomechanically constructed be resilient tough while maintaining a self‐sharpening point. Based on SEM analysis of isolated tooth elements collected primarily from Ordovician Silurian Gotland, we provide detailed structural earliest echinoderm teeth. Eight distinct constructional designs recognized encompassing various degrees sophistication, simple...
The fossil echinoderm Palaeocucumaria, from the early Devonian Hunsrück Slate of southwestern Germany, has been studied using both traditional techniques and X-ray microtomography, its anatomy clarified. Phylogenetic analysis shows that it is a stem-group holothurian with combination characters help understand how modern (crown-group) body plan developed. Echinoids holothurians have evolved along different paths, by differential growth larval- rudment-derived regions. Palaeocucumaria late...
Aspidochirote holothurian ossicles were discovered in Upper Ordovician-aged Öjlemyr cherts from Gotland, Sweden. The well-preserved material allows definitive assignment to the family Synallactidae, a deep-sea sea cucumber group that is distributed worldwide today. new taxon Tribrachiodemas ordovicicus gen. et sp. nov. described, representing oldest member of Aspidochirotida. further fossil record Synallactidae and evolutionary implications are also discussed.
The echinoids of the order Bothriocidaroida represent initial burst sea urchin diversification. They were first to achieve widespread biogeographical dispersal and achieved high levels species richness compared other clades stem group echinoids. Following long-standing controversy regarding their phylogenetic affinities within phylum Echinodermata, bothriocidaroids are now regarded as species- genus-level relationships bothriocidaroids, are, however, less clearly known. We herein compile a...
The Late Cretaceous white chalk of the Isle Rügen, northeastern Germany, yields a highly diverse marine floral and faunal assemblage with more than 1,400 described species, including pennatulacean corals. All new collected material, composed fragments axial rods, belongs to ‘Graphularia’ quadrata Voigt, 1958, which was revised, ‘ Graphularia’ rugia. Analyses microstructure rods modern fossil sea pens facilitate discussion systematic relationships material. shows an affinity Funiculinidae,...
Abstract Moroccodiscus smithi represents a new cyclocystoid genus and species based on moldic specimens from the Middle Ordovician Taddrist Formation (Darriwilian) of SE Morocco. This earliest articulated member Cyclocystoidea is first complete described Gondwana, as well ever recorded Africa. The anatomy morphology this were studied using combination conventional paleontological methods nondestructive X-ray computed tomography. Because differs other cyclocystoids, in particular by lacking...
Biodiesel can act as carbon source for bacterial metabolisms, leading to corrosion of steel. In this study, the steel by biodiesel blends (B15, B20, B30) was observed in presence Bacillus megaterium. The effect concentration on microorganism-induced investigated electrochemical impedance spectroscope (EIS), scanning electron microscope (SEM) and digital microscope. results showed that under various concentrations, megaterium grow form biofilm Based analysis, their increase rate cause pitting...