Horodyskia williamsii, Precambrian Biota Quetzalcoatlus and more distantly to spiders

and more distantly to spiders and scorpions

providing further evidence that bipedalism preceded increase in brain size in human evolution

The skull was set at an acute angle

Conchoraptor was a small dinosaur

body temperature control surfaces

Horodyskia williamsii, Precambrian Biota Quetzalcoatlus and more distantly to spidersA new species of Precambrian macrofossil, previously described informally as a string of beads, is here assigned to the genus Horodyskia Yochelson and Fedonkin, 2000, and formally named Horodyskia williamsii. It is known from Mesoproterozoic siliciclastic rocks that are older than 1070 MYA and younger than 1465 MYA; Horodyskia was first found in the Ashburton region of Western Australia. The fossils are most commonly found as impressions on the sole