Distributions of extinction times from fossil ages and tree topologies: the example of mid-Permian synapsid extinctions
- Environmental Science, GeographyPeerJ
The timing of extinctions of these three Permo-Carboniferous synapsid taxa and of their component lineages supports the idea that the biological crisis in the late Kungurian/early Roadian consisted of a progressive decline in biodiversity throughout the Kungurians.
Distributions of extinction times from fossil ages and tree topologies: the example of some mid-Permian synapsid extinctions
- Environmental Science, GeographybioRxiv
Given a phylogenetic tree that includes only extinct, or a mix of extinct and extant taxa, where at least some fossil data are available, we present a method to compute the distribution of the…
A re-assessment of the oldest therapsid Raranimus confirms its status as a basal member of the clade and fills Olson's gap.
- BiologyDie Naturwissenschaften
CT scanning techniques are used to digitally reconstruct the bones and trigeminal canals of the snout of Raranimus in 3D and confirm that RarAnimus shares a high number of synapomorphies with more derived therapsids and is the only theraapsid known so far to display a "pelycosaur"-like maxillary canal bearing a long caudal alveolar canal that gives off branches at regular intervals.
A faunivorous early sphenacodontian synapsid with a diastema
- BiologyPalaeontologia Electronica
The diagnosis of this new form, Kenomagnathus scottae gen. et sp.