enteropneust


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enteropneust

(ˈɛntərɒpˌnjuːst)
n
(Zoology) a worm-like marine invertebrate. Also called: acorn worm
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The northwest plains were the home of deep-sea enteropneust acorn worms.
Our description of Spartobranchus tenuis, a creature previously unknown to science, pushes the fossil record of the enteropneusts back 200 million years to the Cambrian period, fundamentally changing our understanding of biodiversity from this period," he added.
Since their discovery in the 19th-century, some of the biggest questions in hemichordate evolution have focused on the group's origins and the relationship between its two main branches: the enteropneusts and the pterobranchs, including graptolites.
The discovery of a 500-million-year-old penis-shaped fossil has provided a missing link that pushes back evolution of enteropneusts by 200 million years.
Yoda purpurata -- to be exact -- is the name now given by a University of Aberdeen-led team of scientists to one of three new species of deep sea acorn worms or Enteropneusts discovered 2,500m or around 1.