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A new bizarrely shaped spoon worm, Arhynchite hayaoi, from Japan

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Posted June 28, 2013
This image shows the new spoon worm species, Arhynchite hayaoi. Credit: Teruaki Nishikawa

This image shows the new spoon worm species, Arhynchite hayaoi. Credit: Teruaki Nishikawa

A new species of the peculiarly shaped spoon worms has been recently discovered in Japan, and described in the open access journal Zookeys. These animals derive their name from their elongated and spoon-like projection (the proboscis), issuing from the barrel- or sweet potato-like roundish body proper (the trunk).

 

The new species Arhynchite hayaoi was discovered on a sandy tidal flat named Hachi-no-higata of the Seto Inland Sea, Japan. Like most spoon worms, the new species has the typical peculiar spoon shaped proboscis. The animal is of a pinkish-yellow colour, and its body length reaches about 10 cm in total.

Spoon worms, scientifically called Echiura, are a small group of exclusively marine animals. Although they are members of annelid worms, most of which has segmented structure, they have lost segmentation during their evolutionary history. Like the new species from Japan, most spoon worms live in shallow waters, but some are connected with deep sea waters. Most representatives are deposit feeders, which means that they use their “spoon” to collect organic particles or fragments from their surroundings.

Read more at: Phys.org

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