Saturday, September 16, 2017


Article Written By: Kyle Tam


 Researchers from Yale University have found evidence of Edrioasteroids (marine invertebrates from 430 million years ago) having tiny tube feet. The proof (Proceedings of the Royal Society B) was found in an unusually well-preserved fossil in the fossil beds of Herefordshire, England, where an abundance of Edrioasteroids were buried alive by volcanic ash from the Silurian Period (443-416 million years ago).
"The tube feet are the first things that go" says Colin Sumrall, University of Tennessee. “The thing that’s so stunning is that they didn’t rot away.”
 Tube feet use pressure in the water vascular system to retract and extend their feet. Uses vary from food collection and water or gas filtration.

 The Researchers found out using 3-D images (layering cross sections) that the head-end had tiny tube feet that were covered partially by five plates in a pentagonal ring. This analysis revealed that the specimen was a new genus and species named
Heropyrgus disterminus with a five-point symmetry in its top part and eight-point symmetry in its body.
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