Acorn worms, also known as enteropneust (literally, ‘gut-breathing’) hemichordates, are marine invertebrates that share features with echinoderms and chordates. Together, these three phyla comprise ...

The origin of the body plan of our own phylum, Chordata, is one of the most fascinating questions in evolutionary biology. Yet, after more than a century of debate, the evolutionary origins of the ...

A group of Japanese and American researchers found that the Ptychodera flava, a worm-like marine organism capable of regenerating its entire head or body, draws on reprogramming-based mechanisms that ...

New research undertaken by scientists at the Smithsonian National Museum of Natural History, Royal Ontario Museum (ROM) and University of Montreal, has uncovered fossils of a new species of marine ...

The discovery of a set of highly conserved genes implicated in patterning during animal development represents one of the most striking findings from the field of evolutionary developmental biology.

Severe injury to the central nervous system of chordates often results in permanent and irreversible mental and physical challenges. While some chordates are able to repair and/or regenerate portions ...

A group of Japanese and American researchers found that the Ptychodera flava, a worm-like marine organism capable of regenerating its entire head or body, draws on reprogramming-based mechanisms that ...

Hemichordates also share many of the same characteristics as chordates -- a group of animals that includes humans -- with the name hemichordate roughly translating to 'half a chordate.' "Work from my ...

A half-a-billion years old fossil species of marine animal sheds light on how the anatomies of the two main types of an animal group called the hemichordates are related, and provides new evidence in ...

CC0 Usage Conditions ApplyClick for more information. Many marine invertebrates have larval stages that look nothing like the adults. But these hemichordates take it to an extreme. There is nothing ...