Nectocaridids are enigmatic Paleozoic animals with a controversial position. These creatures were adapted for swimming, having fins, a head region with...
The rapid increase in diversity and abundance of biomineralizing organisms during the Early Cambrian epoch (around 535 million years ago) is often attributed...
Paleontologists have hypothesized for decades that a major animal group called Ecdysozoa must be older than the Cambrian period, but until now its origins...
Named Youti yuanshi, the newly-identified euarthropod species fills an important gap in our understanding of how the arthropod body plan originated and...
Paleontologists from the Nanjing Institute of Geology and Palaeontology at the Chinese Academy of Sciences and elsewhere have found a partial body fossil...
The brain-encysting lancet liver fluke Dicrocoelium dendriticum induces Formica polyctena ants to climb and bite to vegetation by the mandibles in a state...
Paleontologists have found several species of parasites, including Ascaridida eggs, in a 200-million-year-old coprolite probably produced by a crocodile-like...
Chaetae are stiff bristles made of chitin that characterize many species of annelid worms.
Reconstruction of Shaihuludia shurikeni from the Spence Shale...
Precise radiocarbon dating indicates that Panagrolaimus kolymaensis, a species of soil nematode new to science, remained in cryptobiosis for about 46,000...
New research shows how the nematode Caenorhabditis elegans, a long-used model organism, can use electric fields to ‘jump’ across Petri plates or onto...
The principal animal lineages diverged in the Cambrian period, but most diversity at lower taxonomic ranks arose more gradually over the subsequent 500...
Wufengella bengtsoni, an extinct species of tommotiid worm that lived during the Cambrian period, resembles the ancestor of three major groups of living...
Bloodworms Glycera dibranchiata are known for their unusual jaws, which are made of protein (∼50% w/w), ionic and mineralized copper (up to 10%), and...
Insect-eating birds that feed nestlings with grasshoppers, beetles, or moths perform insect prey preparation before feeding nestlings so that the nestlings...
Marine biologists have described a third species of branching syllid worm — and the second within the genus Ramisyllis — living inside an undescribed...
Post-reproductive Caenorhabditis elegans nematode mothers exhibit a form of primitive lactation, releasing yolk milk through their vulva that can enhance...
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...
An international team of marine biologists has described two new species of the polychaete worm genus Melinnopsis from deep waters off the east coast of...
An enigmatic worm-like animal called Facivermis yunnanicus lost lower limbs for tube-dwelling lifestyle, according to new research published in the journal...
A research team led by American University scientists has sequenced the genome of the thermophilic subterrestrial nematode Halicephalobus mephisto, one...
