Molluscs comprise the second largest phylum of animals (after arthropods), occurring in
virtually all habitats. Some are commercially important, a few are pests and some carry …

Background Despite the excellent fossil record of cephalopods, their early evolution is
poorly understood. Different, partly incompatible phylogenetic hypotheses have been …

Lytoceratites together with Phylloceratites are often described as “conservative”. However,
the origin and monophyly of lytoceratid ammonites as well as their role in the evolution of all …

Palaeozoic ammonoids are not only valuable index fossils, but are also valuable for
discriminating global crises in biodiversity such as the end-Eifelian Kačák Event, the …

Jurassic-Cretaceous (JK) ammonoids experienced remarkably rapid rates of evolution and
extinction. The processes that fueled this evolutionary volatility are not well understood …

Belemnites are an extinct group of Mesozoic coleoid cephalopods, common in Jurassic and
Cretaceous marine sedimentary rocks. Despite their significance, their total group phylogeny …

Evolutionary radiations have been extensively studied especially in the fossil record and in
the context of postcrisis recoveries. The concept of adaptive radiation that emerges from this …

Ammonite phylogeny has mainly been established based on a stratigraphic approach, with
cladistics underconsidered. The main arguments against the use of cladistics are the …

The spatial distribution of Paleozoic ammonoids shows an indifferent picture. Time intervals
with inconspicuous biogeographic patterns alternate with intervals of well-expressed …

Phylogenetic reconstruction of the Upper Barremian ammonite genus Gassendiceras
(Gassendiceratinae) was performed using a cladistic analysis incorporating continuous …