Taxonomy term

arthropods

Burgess Shale fossil find offers glimpse of early parenting

Parenting behaviors of many modern animals are well known. Marsupials, like kangaroos, keep their young in pouches, and brown bear mothers are famously protective of their offspring, for example. By caring for their young, parents can increase the survival chances of their offspring. But for all we know about animals today, the origins of parenting are much less understood. Now, a new study has shed light on one of the earliest demonstrated examples of parental behavior in animals: brood care among ancient shrimplike arthropods.

10 May 2016

From fearsome predator to filter feeder

Early in the Paleozoic, giant arthropods known as anomalocaridids were the largest predators in the sea. A collection of finely preserved fossils, described in a new study in Nature and belonging to the Early Ordovician Fezouata Biota of Morocco, is now giving paleontologists a more detailed look at a 2-meter-long variety called Aegirocassis benmoulae. The fossils seem to suggest that at least this species wasn’t a predator after all.
 
10 Aug 2015

Re-examining the Burgess Shale

About 505 million years ago, the continent that would become North America straddled the equator. With no terrestrial plants or animals, the land was a barren landscape. The warm, shallow sea bordering the continent, however, hosted a carbonated reef teeming with a diverse array of organisms, most of which were relatively small bottom-dwellers. Periodically, the animals would get washed over the reef and deposited at its base, where their bodies accumulated in the muddy sediments. Today, these creatures are beautifully preserved in the Burgess Shale.

24 Aug 2009