Christian Klug

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Artist reconstruction of Alienacanthus malkowskii, a 365-million-year-old placoderm fish from Poland and Morocco. (Beat Scheffold & Christian Klug)

A 365‑million‑year‑old fish with an extreme underbite showcases vertebrate diversity

Melina Jobbins, University of Zurich; Christian Klug, University of Zurich, and Martin Rücklin, Leiden University

What paleontologists had believed to be spiny fins turned out to be elongated jaws. New examination of fossils that were 365 million years old revealed a fish with a remarkable lower jaw.
The bodies of comb jellies like Mertensia ovum are soft, meaning they rarely fossilize. (Alexander Semenov)

Finding a rare fossilized comb jelly reveals new gaps in the fossil record

Richard Cloutier, Université du Québec à Rimouski (UQAR); Christian Klug, University of Zurich, and Mike Lee, Flinders University

Fossilized comb jellies, or ctenophores, are rare because the creatures are almost completely soft-bodied. Rare fossil finds are helping us learn more about ancient animals and evolution.

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