Tag: acorn worms
Fossil Friday: Hemichordate Body Plan and Lifecycle Goes Back to the Cambrian Explosion
This Fossil Friday we will discuss the abrupt origin of yet another animal phylum during the famous Cambrian Explosion.
A Remarkably Candid Statement About an Unsolved Evolutionary Puzzle
According to current systematic theory, everyone reading this right now belongs to the taxonomic category Deuterostomia.
Placozoa: An Evolutionary Leftover?
Simple, small, and worldwide in distribution, the placozoa don’t fit any clear evolutionary picture.