Winand Brinkmann - Academia.edu (original) (raw)
Papers by Winand Brinkmann
The Permian and Triassic were key time intervals in the history of life on Earth. Both periods ar... more The Permian and Triassic were key time intervals in the history of life on Earth. Both periods are marked by a series of biotic crises including the most catastrophic of such events, the end-Permian mass extinction, which eventually led to a major turnover from typical Palaeozoic faunas and floras to those that are emblematic for the Mesozoic and Cenozoic. Here we review patterns in Permian-Triassic bony fishes, a group whose evolutionary dynamics are understudied. Based on data from primary literature, we analyse changes in their taxonomic diversity and body size (as a proxy for trophic position) and explore their response to Permian-Triassic events. Diversity and body size are investigated separately for different groups of Osteichthyes (Dipnoi, Actinistia, 'Palaeopterygii', 'Subholostei', Holostei, Teleosteomorpha), within the marine and freshwater realms and on a global scale (total diversity) as well as across palaeolatitudinal belts. Diversity is also measured for different palaeogeographical provinces. Our results suggest a general trend from low osteichthyan diversity in the Permian to higher levels in the Triassic. Diversity dynamics in the Permian are marked by a decline in freshwater taxa during the Cisuralian. An extinction event during the end-Guadalupian crisis is not evident from our data, but 'palaeopterygians' experienced a significant body size increase across the Guadalupian-Lopingian boundary and these fishes upheld their position as large, top predators from the Late Permian to the Late Triassic. Elevated turnover rates are documented at the Permian-Triassic boundary, and two distinct diversification events are noted in the wake of this biotic crisis, a first one during the Early Triassic (dipnoans, actinistians,…
Palaeont Z, 1984
Abstract The Tremp basin, North-Spain, is a classical area of paleontological research. From the... more Abstract The Tremp basin, North-Spain, is a classical area of paleontological research. From the Upper Cretaceous of this region we know up to now two Sauropods (Hypselosaurus, Titanosaurus) and aniguanodontid Dinosaur (Rhabdodon). Both ischia described in this paper are derived from a Hadrosaur skeleton. This is the first record of the group south of the Pyrenees. It remains uncertain, whether the
Supplement to Romano Carlo Goudemand Nicolas Vennemann Torsten W Ware David Schneebeli Hermann Elke Hochuli Peter a Bruhwiler Thomas Brinkmann Winand Bucher Hugo Climate and Biotic Upheavals Following the End Permian Mass Extinction Nature Geoscience 6 57 60 Doi 10 1038 Ngeo1667, Dec 21, 2013
At two fossil localities in Northern Sudan, about 200 km northwest of Khartoum, numerous remains ... more At two fossil localities in Northern Sudan, about 200 km northwest of Khartoum, numerous remains of a terrestrial vertebrate fauna could be collected which allow a classification of the fossiliferous strata into the Upper Cretaceous. The gathered vertebrate remains belong to lungfishes (cf. Protopterus), turtles, crocodiles (Dyrosauridae), sauropods (Titanosauridae) and theropods. The formation from which the fossils originate consists of fluviatile and limnic sediments which were deposited in a tectonically active continental basin. The vertebrate fauna itself comes from lacustrine and braided river sediments. -Authors
The baculum, a heterotopic ossification in the penis, hence known as penis bone, is a common bodi... more The baculum, a heterotopic ossification in the penis, hence known as penis bone, is a common bodily structure among mammals. Its weight is commonly used for age determination in raccoons, especially to separate juvenile from adult individuals. The project aimed primarily at confirming that the previously observed relationship between weight of the baculum and age also holds for the raccoon population from Müritz-Nationalpark (Germany). Additionally, the analysis of allometric relationships between bacular traits and correlations with age, hind foot length and testicle mass aimed at revealing further aspects of bacular functionality and ontogeny.
The Permian and Triassic were key time intervals in the history of life on Earth. Both periods ar... more The Permian and Triassic were key time intervals in the history of life on Earth. Both periods are marked by a series of biotic crises including the most catastrophic of such events, the end-Permian mass extinction, which eventually led to a major turnover from typical Palaeozoic faunas and floras to those that are emblematic for the Mesozoic and Cenozoic. Here we review patterns in Permian-Triassic bony fishes, a group whose evolutionary dynamics are understudied. Based on data from primary literature, we analyse changes in their taxonomic diversity and body size (as a proxy for trophic position) and explore their response to Permian-Triassic events. Diversity and body size are investigated separately for different groups of Osteichthyes (Dipnoi, Actinistia, 'Palaeopterygii', 'Subholostei', Holostei, Teleosteomorpha), within the marine and freshwater realms and on a global scale (total diversity) as well as across palaeolatitudinal belts. Diversity is also measured for different palaeogeographical provinces. Our results suggest a general trend from low osteichthyan diversity in the Permian to higher levels in the Triassic. Diversity dynamics in the Permian are marked by a decline in freshwater taxa during the Cisuralian. An extinction event during the end-Guadalupian crisis is not evident from our data, but 'palaeopterygians' experienced a significant body size increase across the Guadalupian-Lopingian boundary and these fishes upheld their position as large, top predators from the Late Permian to the Late Triassic. Elevated turnover rates are documented at the Permian-Triassic boundary, and two distinct diversification events are noted in the wake of this biotic crisis, a first one during the Early Triassic (dipnoans, actinistians,…
Palaeont Z, 1984
Abstract The Tremp basin, North-Spain, is a classical area of paleontological research. From the... more Abstract The Tremp basin, North-Spain, is a classical area of paleontological research. From the Upper Cretaceous of this region we know up to now two Sauropods (Hypselosaurus, Titanosaurus) and aniguanodontid Dinosaur (Rhabdodon). Both ischia described in this paper are derived from a Hadrosaur skeleton. This is the first record of the group south of the Pyrenees. It remains uncertain, whether the
Supplement to Romano Carlo Goudemand Nicolas Vennemann Torsten W Ware David Schneebeli Hermann Elke Hochuli Peter a Bruhwiler Thomas Brinkmann Winand Bucher Hugo Climate and Biotic Upheavals Following the End Permian Mass Extinction Nature Geoscience 6 57 60 Doi 10 1038 Ngeo1667, Dec 21, 2013
At two fossil localities in Northern Sudan, about 200 km northwest of Khartoum, numerous remains ... more At two fossil localities in Northern Sudan, about 200 km northwest of Khartoum, numerous remains of a terrestrial vertebrate fauna could be collected which allow a classification of the fossiliferous strata into the Upper Cretaceous. The gathered vertebrate remains belong to lungfishes (cf. Protopterus), turtles, crocodiles (Dyrosauridae), sauropods (Titanosauridae) and theropods. The formation from which the fossils originate consists of fluviatile and limnic sediments which were deposited in a tectonically active continental basin. The vertebrate fauna itself comes from lacustrine and braided river sediments. -Authors
The baculum, a heterotopic ossification in the penis, hence known as penis bone, is a common bodi... more The baculum, a heterotopic ossification in the penis, hence known as penis bone, is a common bodily structure among mammals. Its weight is commonly used for age determination in raccoons, especially to separate juvenile from adult individuals. The project aimed primarily at confirming that the previously observed relationship between weight of the baculum and age also holds for the raccoon population from Müritz-Nationalpark (Germany). Additionally, the analysis of allometric relationships between bacular traits and correlations with age, hind foot length and testicle mass aimed at revealing further aspects of bacular functionality and ontogeny.