We know that some animals are bilaterian—meaning they display bilateral symmetry—while others are not, but nature is rarely ...

A study from the University of Vienna reveals that sea anemones use a molecular mechanism known from bilaterian animals to form their back-to-belly body axis. This mechanism ("BMP shuttling") enables ...

Your Butthole Had A Very Different Role In The Ancient Past, New Study Suggests Scientists really be like "the xenacoelomorph gonopore is homologous to the bilaterian anus" when they mean "your ...

Much more complex digestive systems consisting of a tubular digestive tract associated with glands that secrete enzymes for extracellular digestion can be found in Bilateria. Among invertebrates, the ...

A new study sheds new light on the origins of modern brain cells. Researchers find evidence that specialized secretory cells found in placozoans, tiny sea creatures the size of a grain of sand ...

Furthermore, neuropeptides and their GPCRs occur in two early-branching phyla that diverged before the emergence of Bilateria: Cnidaria (animals like corals and sea anemones), and Placozoa (small disk ...

We found that in several trees Cnidaria + Bilateria or Bilateria alone also emerged as sister groups of Placozoa. Previous studies support three relationships of the Placozoa described above (see ...

Because β-catenin–dependent mechanotransduction and activation of brachyury is also found in other Bilateria (16), these findings imply that this mechanism of gene regulation and the feedback between ...