Fossil Friday

A fossil!

Oh, the inexhaustible charms of the Ediacaran! The first person correctly to identify the specimen here in the comments below will find his or her name forever enshrined in the annals of Answer Monday. The first person to ask, “What are fronds for?” or to comment, “With fronds like these …” will find himself or herself to have been pre-empted. Also, they’re not fronds anyhow.