Life reconstructions of galeaspid species with "nine tails" discovered in south China's Guangxi Zhuang autonomous region. (PHOTO COURTESY OF CHINA NEWS SERVICE)

BEIJING - Researchers have discovered a new fossilized galeaspid species with "nine tails" in south China's Guangxi Zhuang autonomous region. This is the world's first galeaspid fossil with a well-preserved tail.

According to the researchers from the Institute of Vertebrate Paleontology and Paleoanthropology under the Chinese Academy of Sciences, they named the new species as Foxaspis novemura because its caudal fin is comprised of nine ray-like scale-covered digitations, just like that of the Nine-Tailed Fox, a mythical animal from an ancient literature "Shan Hai Jing" (Classic of Mountains and Seas).

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Photo shows a complete headshield articulated with body and tail preserved together with a complete arthrodiran fish.  (PHOTO COURTESY OF CHINA NEWS SERVICE)

The fossil specimen completely preserves the caudal fin in both folded and flared states, revealing its morphological details to the greatest extent, according to Gai Zhikun, a research professor from the institute.

"We discovered that galeaspids may be active swimmers, and can make good use of muscle contraction to control the contact area between tail and water flow, thus generating different thrust forces," he said.

Photo shows an exceptionally preserved fossil of "nine tails". (PHOTO COURTESY OF CHINA NEWS SERVICE)

The team then analyzed the swimming speed of the geometrical morphology of the tail and showed that galeaspid's cruising speed was even faster than that of their more derived jawless and jawed relatives.

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The researchers published their study results in the journal National Science Review.

Photo shows the exceptionally preserved fossils of fishes and plants associated with Foxaspis. (PHOTO COURTESY OF CHINA NEWS SERVICE)

Life restoration and caudal fin evolution of the "nine tails."(PHOTO COURTESY OF CHINA NEWS SERVICE)