The limestones on southern wall of the Koskobilo quarry in northern Spain yielded 36 decapod crustacean species, eight of which are brand-new to science, including two of the world's oldest spider crabs known to date.
A new species of tiny fossil crab, Graptocarcinus texanus discovered in limestones of the Koskobilo quarry in northern Spain.
Lead researcher Adiel Klompmaker at the Koskobilo quarry in northern Spain.
Klompmaker was also part of a team that discovered a new hermit crab (carapace shown here) at the same quarry, naming it after Michael Jackson (Mesoparapylocheles michaeljacksoni), as it was found around the time the singer died.
Here, a fossil of one of the new species of spider crab, named Cretamaja granulata, found at the quarry and dating back 100 million years.
Scientists could tell C. granulata was a spider crab by some of its distinctive features, including two diverging spines coming out of its rostrum and a somewhat pear-shaped carapace, or the shell covering its body. The fossil spider crab also sported spines on its sides at the front of the body.
The carapace of the newfound crab Laeviprosopon crassumI. The legs and tail part were not preserved. (Scale bar is 1.0 mm)
Another newfound crab, called Albenizus minutus, from the quarry in northern Spain. The crab was teensy, with a length of just 3.2 millimeters, not including its rostrum (the extension of the shell in front of the eyes).