This video is about an eurypterid.
From British daily The Guardian:
Relax, it died 390m years ago – huge scorpion find points to existence of giant spiders
· Claw find in quarry makes scientists think again
· Arthropods may have been bigger than thought
* Steven Morris
* Wednesday November 21 2007
It is enough to give people with arachnophobia a large dose of the heebie-jeebies. Scientists have discovered the fossilised claw of a sea scorpion that suggests the giant scorpions, spiders and crabs that once crawled around the world were even bigger than previously thought.
Found in a German quarry, the claw is 46cm (18ins) long, suggesting the sea scorpion was 2.5m (8ft) long – almost two feet longer that it was previously thought the aquatic creatures grew to. Because land-based scorpions and spiders are believed to have descended from the sea scorpion, scientist believe the discovery means that they also may have been even bigger than had been believed.
Dr Simon Braddy from the department of earth sciences at the University of Bristol, co-author of an article about the find, said: “This is an amazing discovery. We have known for some time that the fossil record yields monster millipedes, super-sized scorpions, colossal cockroaches, and jumbo dragonflies, but we never realised, until now, just how big some of these ancient creepy-crawlies were. I think the claws on this creature would have been powerful enough to rip someone to shreds.” Fortunately for mankind, humans were not on the scene until millions of years later.
The claw was found by scientist Markus Poschmann in rocks 390m years old at a quarry near Prüm in Germany. The research is published online in the Royal Society’s journal Biology Letters.
The name of the fossil sea scorpion is Jaekelopterus rhenaniae. See also here. And here. And here. And here.
First Tool Users Were Sea Scorpions? Here.
A missing link in the evolution of the front claw of living scorpions and horseshoe crabs was identified with the discovery of a 390 million-year-old fossil by researchers at Yale and the University of Bonn, Germany: here. And here.
Big fossil animals: here.
Yeti crab: here.
Antarctic Hot Springs Yields Ghostly New Species. A “Yeti” crab, seven-legged seastar and a pale octopus discovered around the vent are reshaping theories on marine life: here.
Giant insects disappeared thanks to falling oxygen levels and agile birds: here.