On the other side Wang examined two other fossils of the species and based on its silk-spinning apparatus he stated that they belonged to the spider species lived around 100 million years ago.
This odd appendage, which is absent in modern spiders, can be found in vinegaroons, a group of nightmarish scorpion-looking creatures that lives today.
Amber mined for centuries in Myanmar for jewelry is a treasure trove for understanding the evolution of spiders and their other arachnid relatives.
The new animal resembles a spider in having fangs, male pedipalps, four walking legs and silk-producing spinnerets but also bears a long flagellum or tail. The two groups didn't know they were working on such similar fossils until it came time to publish their findings, says Paul Selden, director of The Paleontological Institute at the University of Kansas and a co-author of one of today's studies. They only measured 2.5 millimeters in length with a tail longer than its body at 3 millimeters.
Four specimens of the arachnid - called Chimerarachne yingi - which was found reportedly existed in a tropical forest more than 100 million years ago.
But the creature, which likely walked the Earth more than 100 million years ago, also had a tail. But it is one of modern spiders' closest cousins, and it presents some intriguing hints at how they evolved.
"In the last few years, this kind of amber has become much more available and because of its age - it's a hundred million years old or older - it lets us see really far back into the past", he said.
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Luckily for everyone who hates spiders, these new animals were not very big according to the researchers.
Each spider's body was about 3mm long, while the tail measured up to 5mm.
The finding is described in a paper appearing in Nature Ecology & Evolution by an global team including Paul Selden of the Paleontological Institute and Department of Geology at the University of Kansas and colleagues from China, Germany, Virginia and the United Kingdom.
The species is being called Chimerarachne, a riff on Chimera, a fire-breathing hybrid creature found in Greek mythology.
This handout image shows a photo of the holotype of the dorsal view of a Chimerachne yingi spider. The creature fills the gap between ancient arachnids with tails and true spiders, Ricardo Perez-De-La-Fuente of the Oxford Museum of Natural History told the BBC.
The species has a typical Uraraneidan telson, but also boasts trademark Araneaen structures, including well defined spinnerets for silk production. An worldwide team of researchers from the United States, China, Germany, and the United Kingdom announced the discovery today (February 5) in two papers in Nature Ecology & Evolution. A study in the journal Nature Ecology & Evolution describes the tail as "whip-like" and says it hints at a previously unknown "lineage of tailed spiders" going back millions of years.
Diying Huang, the researcher behind the second paper, noted that the arachnid had spinnerets but it may not have woven webs like spiders do. Some argue that spinnerets were the key innovation that allowed spiders to become so successful; there are almost 50,000 known spider species alive today.