Chaetae are stiff bristles made of chitin that characterize many species of annelid worms.
Reconstruction of Shaihuludia shurikeni from the Spence Shale...
Burgessomedusa phasmiformis had a cuboidal umbrella up to 20 cm (8 inches) high and over 90 short, finger-like tentacles.
Artistic reconstruction of a...
The principal animal lineages diverged in the Cambrian period, but most diversity at lower taxonomic ranks arose more gradually over the subsequent 500...
Paleontologists have examined the 514-million-year-old specimens of Gangtoucunia aspera, a tube-building marine animal from the Guanshan Lagerstätte of...
Wufengella bengtsoni, an extinct species of tommotiid worm that lived during the Cambrian period, resembles the ancestor of three major groups of living...
Paleontologists have examined new microfossils of a Cambrian microscopic animal called Saccorhytus coronarius, which was previously interpreted as a deuterostome,...
Balhuticaris voltae is the largest bivalved arthropod to date, at almost double the size of the previous record-holder, Nereocaris exilis.
Life reconstruction...
Erratus sperare, a new species of ancient marine arthropod from eastern Yunnan, China, had unique trunk appendages that represent an intermediate stage...
A new genus and species of palaeoscolecid worm has been identified from two specimens found in the Burgess Shale-type deposits in Utah, the United States.
Arrakiscolex...
Paleontologists have described the largest Cambrian hurdiid radiodont known so far, named Titanokorys gainesi, from the Burgess Shale, British Columbia,...
Paleontologists have described two new species from the Cambrian period of Utah, which illuminate the early evolution of nervous and sensory features in...
Trilobites had well-developed gill-like structures in their upper leg branches, according to a new imaging study led by the University of California, Riverside.
Trilobite...
Paleontologists have described the first three-dimensional preservation of soft tissue in Namacalathus hermanastes, a skeletal metazoan (multicellular...
A team of paleontologists from Australia and the United Kingdom has found that ancient deep-sea creatures called radiodonts developed sophisticated eyes...
Paleontologists in China have uncovered exceptionally preserved fossils of a previously unknown genus and species of extinct arthropod, Kylinxia zhangi,...
An enigmatic worm-like animal called Facivermis yunnanicus lost lower limbs for tube-dwelling lifestyle, according to new research published in the journal...
A new species of marine predator that lived about 506 million years ago (Cambrian period) has been identified from exceptionally well-preserved fossils...
Paleontologists have unearthed fossils of a giant trilobite species that inhabited Australian waters approximately 500 million years ago (Cambrian period).
An...
