A5022338699- Ichthyology and Marine Biology
- Paleontology and Evolutionary Biology
- Fish biology, ecology, and behavior
- Evolution and Paleontology Studies
- Fish Biology and Ecology Studies
- Paleontology and Stratigraphy of Fossils
- Identification and Quantification in Food
- Ancient and Medieval Archaeology Studies
- Geological Studies and Exploration
- Linguistics and language evolution
- Fish Ecology and Management Studies
- Geological formations and processes
- Geochemistry and Elemental Analysis
- Neurobiology and Insect Physiology Research
- Geology and Paleoclimatology Research
- Archaeology and ancient environmental studies
- Fossil Insects in Amber
- Marine animal studies overview
- Linguistics and Cultural Studies
- Geological Formations and Processes Exploration
- Geological and Geophysical Studies
- Marine and fisheries research
- Spider Taxonomy and Behavior Studies
- Archaeological Research and Protection
- Geological and Geochemical Analysis
Leibniz University Hannover
2001-2024
Institut für Geologie und Umwelt (Germany)
2001
American Museum of Natural History
1989
University of Kansas
1989
Abstract The fossil record of chondrichthyans (chimaeras, sharks, rays and skates) consists largely isolated teeth, with holomorphic specimens being extraordinary exceptions. However, numerous these more or less completely preserved are known from several Upper Jurassic deposits Europe, enabling detailed analysis their morphology. Batomorphs (rays resembling modern guitarfishes wedgefishes (Rhinopristiformes) among the most common found, but they have been only sporadically studied up to...
ABSTRACT Lepidotes gloriae, sp. nov. (Actinopterygii: Semionotiformes) from the Late Jurassic of Western Cuba is described. The skeletal anatomy this fish shows two features previously unknown in Agassiz, 1832: 1) presence pairs ectopterygoids and 2) dermometapterygoids. Skeletal elements whose structure little known or even other species have been studied detail L. gloriae: branchial tooth plates, endoskeletal shoulder girdle, 3) posttemporal, 4) clavicle, 5) pelvic 6) caudal fin skeleton....
A Speiballen (regurgitated compacted mass of indigestible stomach contents) from the Lower Jurassic Posidonia Shale Ohmden, South Germany contains remains four specimens actinopterygian Dapedium sp., specific identity which obscure, and a lower jaw specimen identified as Lepidotes sp. list five suitable characters is proposed to distinguish fossil containing other vertebrate fossils. Large, potentially piscivorous animals in ecosystem comprise chondrichthyans (Hybodus), actinopterygians...
ABSTRACT Bulk sampling of an Upper Jurassic (Kimmeridgian) section in front the northern slope Harz mountains (northern Germany) has yielded a rich assemblage elasmobranch placoid scales. Their study shows that 1) scales can be assigned to five hybodontiform and 15 neoselachian morphotypes, 2) specific or generic identification Late is at present impossible because lack comparative material, 3) partially identified by comparison articulated skeletons neoselachians from Tithonian southern...
Dinosaur tracks at the Dinosaurier-Freilichtmuseum Münchehagen are well-known and reason site is designated part of German National Monument system. Although both sauropod ornithopod have been described in some detail, additional observations presented herein. These include on gauge heteropody sauropods evidence for quadrupedal progression by ornithopods. Theropod also recorded region this time proven to be taxonomically controversial. Most situ "main" surface those preserved a single large...
Dapedium pholidotum (Agassiz, 1832) (Actinopterygii, Neopterygii) is redescribed based on new material from the Posidonia Shale (Early Jurassic: Early Toarcian) of Germany. Dapediiformes ord. nov. introduced for Leach, 1822 and other deep-bodied Mesozoic neopterygians. The species diagnosis D. amended. Comparison with stollorum Thies & Hauff, 2011 Thies, R. B. 2011. A Neopterygii, Semionotiformes) Jurassic South Palaeodiversity, 4, 185–221. [Google Scholar] caelatum Quenstedt, 1858, also...
Abstract The Lower Jurassic (lower Toarcian) Grimmen Formation (formerly known as "Green Series") of Mecklenburg and Western Pomerania (Northeast Germany) yielded two articulated anterior skeletons fossil fish, which represent a new lepisosteiform genus species: Mengius acutidens gen. et sp. nov. taxon is described. Osteology the species most similar to contemporaneous Lepidotes Agassiz. It differs from in having non-tritoral dentition differently shaped operculum. A cladistic analysis shows...
The δ 18 O (PO4) of shark teeth can be used as a geochemical proxy for the palaeoenvironment during tooth mineralization. A well-preserved state is necessary this approach. We polarization, cathodoluminescence (CL) and scanning electron microscopy to investigate two fossil ( Sphenodus nitidus ) from Late Jurassic Nusplingen Plattenkalk. data are compared with those recent Hemipristis elongata , Lamiopsis temminckii ). six further was measured co-occurring belemnite rostra carbonate...
Due to the peculiar combination of dental features characteristic for different squaliform families, position Late Cretaceous genera Protoxynotus and Paraphorosoides within Squaliformes has long been controversial. In this study, we revise these based on previously known fossil teeth new material. The phylogenetic placement among other extant extinct squaliforms is discussed morphological characters combined with DNA sequence data species. Our results suggest that should be included in...
Ginglymodian fishes formed one of the most dominant actinopterygian lineages during Mesozoic, occurring in fully marine to freshwater depositional environments. However, although commonly preserved Mesozoic strata around world, there is little information on feeding ecology these fishes, which mainly due scarcity direct evidence diet. Here we report two specimens ginglymodian fish †Lepidotes (Lepisosteiformes) from Lower Jurassic Germany that exhibit gastric contents consisting small...