Tag: chordates
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.
Fossil Friday: Rhenocystis and the Controversial Calcichordate Hypothesis
It looks a bit like a tadpole with body and tail, and this indeed points towards one of the great scientific controversies of the 20th century.
Fossil Friday: Nectocaris, the Impossible Squid
Paleontology sometimes seems like a kind of imaginative Rorschach test with the flattened fauna of roadkill.
Ignoring Other Research, New Study Explains (Away) the Origin of New Body Plans
Recently, a team of British paleontologists added a new pseudo-explanation.