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A team consisting of three paleontology experts, two of whom are from the Chinese Academy of Sciences and one from the Musée national d'Histoire naturelle, has discovered the fossil remains of two large lamprey species from the Jurassic period in northeastern China.
In their paper published in the journal Nature Communications, Feixiang Wu, Philippe Janvier, and Chi Zhang explained the location of the fossil discovery, its condition, and the characteristics of ancient lampreys. Previous research has shown that lampreys, a type of aquatic vertebrate with a shape similar to eels, without jaws and with a mouth shaped like a sucker, first appeared around 360 million years ago.
Lamprey is still widely distributed in the world's oceans and some freshwater environments until now. Initially small in size, only a few centimeters. However, over time, their size increases and reaches more than one meter in length.
Millions of Years Old.
Knowledge about the history of the evolution of this creature is limited due to the rarity of fossil discoveries. However, in this recent study, two fossils representing two species that are approximately 160 million years old were found by researchers. This discovery helps to complete some information that was previously undisclosed in the history of lamprey evolution.
The following is the translation of the text from 'Bahasa' to 'English' while preserving any html tags: "The two fossils were found in the Yanliao Biota, a rock formation that produces many ancient creature fossils. Both specimens are described to be in very good condition, allowing researchers to study the creatures from head to tail."
The larger specimen is known as Yanliaomyzon occisor, measuring approximately 58 centimeters. Meanwhile, the smaller one is called Yanliaomyzon ingensdentes, with a size of about 28 centimeters. Both species are characterized by a significant number of teeth, with the larger fossil having 16 teeth, while the smaller fossil has 23 teeth.
Researchers note that the mouth structure, teeth, and tongue-holding parts in both indicate that they tend to attach themselves to their prey. In addition to sucking blood, they also remove tissues to be consumed later.
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