The Jurassic fossil Juracanthocephalus reveals a key evolutionary link between rotifers and parasitic acanthocephalans, ...

A research team from the Nanjing Institute of Geology and Paleontology of the Chinese Academy of Sciences has identified a ...

and priapulid worms. Recent research has unveiled new details about the origins and evolution of these structures, shedding ...

The worm's body formed the nucleus for the growth of a 20cm-long sinuous concretion, split into two after collection to reveal the inside. A Silurian fossil from Shropshire, England, interpreted as a ...

From the sea angel to the whirligig beetle to the Priapulid (penis worm), a new book features 540 full-color photographs of creatures humans would otherwise never get to see.

Scientists have discovered an interesting piece of the evolutionary puzzle: how the ventral nerve cord evolved in ecdysozoan animals, a group that includes insects, nematodes, and priapulid worms.

Our collections cover all of the living invertebrate phyla, including Onychophora (velvet worms), Chaetognatha (arrow worms), Gastrotricha (hairybacks), Kinorhyncha (mud dragons), Nemertea (ribbon ...

Morphological studies have proposed various hypotheses linking acanthocephalans to Platyhelminthes (flatworms), Priapulida (penis worms), or Rotifera (wheel animals). However, molecular ...