Carrie Arnold in National Geographic:
When scientist Troy Alexander first announced his find, all he had to show for his discovery was a series of intriguing photographs. He had no idea what Amazonian critter could have created the circular hideaway with a spoke-like outer wall.
After consulting with several entomologists, Alexander hypothesized that it was likely built by a type of cribellate spider, which are known for building elaborate structures.
When we first posted news of the picket fence, readers flooded the blog with suggestions for what had built it and what scientists should name the potential new species. While many of you agreed with Alexander’s hypothesis that the fence was built by a spider, others of you weren’t so sure, guessing that a fungus or caterpillar may have built it.
More here.