Abstract. Molecular studies have dated many component clades in particular biogeographical patterns. Here we review age curves for clades in different patt

Staatliches Museum für Naturkunde Karlsruhe

We report the first ontogenetic information for the compression-preserved Cambrian ecdysozoan worm Cricocosmia jinningensis. Its mosaic growth strategy unifies panarthropod and priapulid developmenta....

YouTube video by Manitoba Museum

The history of Mazon Creek paleontology is filled with fossils that have been reinterpreted as new species when new information became available. Animals have been moved from one group to another, species have been renamed, and some fossils once thought to represent animals have turned out to be something else entirely. There are even some, like Tullymonstrum gregarium, whose place on the tree of life is still being determined. Another particularly interesting story is Howellitubus whitfieldorum. Howellitubus whitfieldorum was described by Eugene Richardson Jr. in the 1956 Fieldiana paper "Pennsylvanian Invertebrates of the Mazon Creek Area, Illinois - Marine Fauna". Richardson described it as an annelid worm of class Chaetopoda and family Serpulidae.

Abstract. Mesozoic ecosystems differed from the present in the abundance of large-bodied herbivores that grew through several feeding envelopes, raising th

This review article on brachiopods is intended to serve several different research communities. First, those who do not study brachiopods — provide th…