A5034191285- Paleontology and Evolutionary Biology
- Ichthyology and Marine Biology
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Evolution and Paleontology Studies
- Isotope Analysis in Ecology
- Parasite Biology and Host Interactions
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Pleistocene-Era Hominins and Archaeology
- Turtle Biology and Conservation
University of Bonn
2019-2024
The fossil fish Ptychodus Agassiz, 1834, characterized by a highly distinctive grinding dentition and an estimated gigantic body size (up to around 10 m), has remained one of the most enigmatic extinct elasmobranchs (i.e. sharks, skates rays) for nearly two centuries. This widespread Cretaceous taxon is common in Albian Campanian deposits from almost all continents. However, specimens mostly consist isolated teeth or more less complete dentitions, whereas cranial post-cranial skeletal...
The ecomorphological diversity of extinct elasmobranchs is incompletely known. Here, we describe Aquilolamna milarcae, a bizarre probable planktivorous shark from early Late Cretaceous open marine deposits in Mexico. Aquilolamna, tentatively assigned to Lamniformes, characterized by hypertrophied, slender pectoral fins. This previously unknown body plan represents an unexpected evolutionary experimentation with underwater flight among sharks, more than 30 million years before the rise manta...
Abstract Experiments are reported to reconstruct the taphonomic pathways of fish toward fossilisation. Acrylic glass autoclaves were designed that allow experiments be carried out at elevated pressure up 11 bar, corresponding water depths 110 m. Parameters controlled or monitored during decay reactions pressure, salinity, proton activities (pH), electrochemical potentials (Eh), and bacterial populations. The most effective environmental parameters delay prevent putrefaction before a carcass...
The platy limestone deposit of Vallecillo in northeastern Mexico is dated to the early-middle Turonian (Late Cretaceous) and known contain a variety well-preserved vertebrate fossils. One most common fish species teleost Tselfatia formosa . A review 149 individuals reveals presence two types body shapes (diamond-shaped torpedo-shaped individuals) which interpreted as sexual shape dimorphism (SSD). unimodal size distribution illustrates dominance diamond-shaped specimens, but both are present...