The antecedent of the squid was discovered


Calvapilosa kroegeri, finally the answer that scientists needed to better understand the evolution of mollusks. It was now discovered the first complete fossil of this animal, nicknamed “grandfathers” of the current squid.

It was a group of scientists at the University of Bristol who discovered the fossil of a mollusc from which the slugs, snails and squid may have evolved among other mollusks that inhabit the sea. Calvapilosa kroegeri, which lived about 480 million years ago, has spines distributed throughout the body and a shell protecting the area of the head. It also has a unique structure of mollusks that works as a tongue and 125 rows of teeth inside your mouth. Scientists believe that this is the fossil of an animal very similar to the one that gave birth to all mollusks that have passed through Earth.

According to the study published in the journal Nature, this animal was about 12 centimeters long and received that name because of the hawk-covered shell in the head and as a tribute to Björn Kröger, the paleontologist who found his fossil on a rock from Morocco that was in the collection of Yale University. This was not the first-time scientists had seen the fossil of this “grandfather” of the squid, but it was the first time they had the opportunity to examine the first complete fossil of this specimen.

Thus, this mollusk fills in many blanks that scientists had not yet filled in on the many doubts and need to understand other fossils that had already been found. As they were able to study the characteristics of the Calvapilosa kroegeri fossil in more detail, they also discovered that there were fossils of other animals that had never been categorized and which are after all like “cousins” of this mollusk.

For example, we now know that the genus Halkieria – beings with two shell-like structures that have not yet been fully understood – are very old mollusks. The answers they now have allow us to better complete the timeline that shows the evolution of this type of animal from millions and millions of years ago, to the present day.