GeoJeopardy! Fridays #40

Time for GeoJeopardy! Fridays, because why not?

- Prehistoric Critters -

As the "avis" suggests, Argentavis' distinction was being able to do this, even at over 250 pounds

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The best guess on the purpose of spinosarus' sail was that by turning it the beast could regulate this

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The sharklike acanthodians were the first vertebrates with these; earlier ones had vacuum-cleaner mouths

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Fossils in Niger indicate the "super" type of this animal was the size of a bus; it often drowned its prey

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If Horton climbed his family tree, he'd go from elephant to stegodon to stegolophodon to this

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All the answers as well as any other previous GeoJeopardy! questions can be found over at my website by clicking the link.  

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Questions, images, and videos courtesy of j-archive.com