The Pliensbachian–Toarcian crisis (Early Jurassic) is one of the major Mesozoic
paleoecological disturbances when ca. 20% of marine and continental families went extinct …

Most ammonoids display a distinctly different morphology when they are adults or subadults.
Depending on the taxon, these mature modifications may comprise changes in coiling …

The internal architecture of chambered ammonoid conchs profoundly increased in
complexity through geologic time, but the adaptive value of these structures is disputed …

Ranging from simple to complex, the folded septa of the phragmocone characterize the
ammonoid clade and contribute much to their aesthetic appearance. However, many …

The buoyancy of ammonoids is one of the most controversial issues of ammonoid
paleobiology. This chapter gives a short historical review about attempts made to clarify the …

The morphological disparity of species within major clades shows a variety of trajectory
patterns through evolutionary time. However, there is a significant tendency for groups to …

Nine sections were measured and studied in the Tadjerouine area (Central Tunisia),
providing an abundant paleontological material. The historical collections of …

One of the most expanded records to contain the final fortunes of ammonoid cephalopods is
within the López de Bertodano Formation of Seymour Island, James Ross Basin, Antarctica …

Several non-invasive methods are common practice in natural sciences today. Here we
present how they can be applied and contribute to current topics in cephalopod (paleo-) …

Extensive construction work at the canal cutting of the Ludwigskanal near Dörlbach,
Franconian Alb, provided the opportunity to re-investigate a scientific-historical and …