The discreteness or otherwise of major Ordovician and Silurian terranes can be recognised
by the shallow-water benthic faunas which lived upon them. Their borders are often …

This paper reviews the methods which have been used to deduce the life habits of trilobites.
The most reliable conclusions are those that satisfy three independent criteria of …

We believe that punctuational change dominates the history of life: evolution is concentrated
in very rapid events of speciation (geologically instantaneous, even if tolerably continuous in …

FEEDING HABITS IN TRILOBITES Page 1 FEEDING HABITS IN TRILOBITES by RA
FORTEY and RM OWENS ABSTRACT. We briefly review the various types of feeding habits …

In this complete and thorough update of Arthur Boucot's seminal work, Evolutionary
Paleobiology of Behavior and Coevolution, Boucot is joined by George Poinar, who …

From a numerical abundance study of the distribution of trilobites through the Valhallfonna
Formation (Arenig-Llanvirn), Ny Friesland, Spitsbergen, three major types of early …

The upper Arenigian to lower Llanvirnian Komstad Limestone Formation is a tongue of the
Baltoscandian'Orthoceratite limestone', intercalated in the predominantly shaly Ordovician …

Ecdysis, the process of moulting an exoskeleton, is one of the key characters uniting
arthropods, nematodes and a number of smaller phyla into Ecdysozoa. The arthropod fossil …

Early Ordovician graptolites are inferred to have lived in two primary depth zones of the
ocean waters. A shallow, epipelagic zone biotope contained species found preserved in all …

Abstract The Svalbard Archipelago is located on the northwestern corner of the Barents
Shelf (Fig. 1). Its position at the upturned edge of the Eurasian continental plate, opposite the …