First an alga, then a squid, enigmatic fossil is actually a fish

A fossil slab discovered in Kansas 70 years ago and twice misidentified — first as a green alga and then as a cephalopod — has been reinterpreted as the preserved remains of a large cartilaginous fish, the group that includes sharks and rays. Researchers now describe the fishy characteristics of weiter …

Source:: https://www.sciencedaily.com/releases/2018/04/180416155605.htm

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