Madrid, 12 (Europe Press)
According to researchers from the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences, they named the new ancestor fish species Foxaspis novemura because its caudal fin consists of nine fingers covered in ray-like scales, just like those of the nine. – Fox-tailed, a mythical animal from the ancient literature “Shan Hai Jing” (Classics of Mountains and Seas).
The fossil specimen perfectly preserves the caudal fin in both the folded and flared states, revealing its morphological details to the greatest extent possible, according to Jay Chikun, a research professor at the institute.
“We found that gallibids can be active swimmers and can make good use of muscle contraction to control the contact area between the tail and the water flow, thus generating different buoyancy forces,” Xinhua was quoted as saying.
The team then analyzed the swimming speed of the geometric tail morphology and showed that the galeaspid’s cruising speed was even faster than that derived from its more jawed and jawed relatives.
The researchers published their findings in the National Science Review.
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