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Ancient sharks reared young in prehistoric river-delta nursery

By Guest PostJanuary 9, 2014Nature, Scienceadult bandringa, ancient, ancient sharks, bandringa fossils, bandringa sharks, electroreceptors, fossilized egg, freshwater, hawaii, illinois state museum, journal, lauren sallan, long snouted, marine, mazon creek, mechanoreceptors, michael coates, ohio, paddlefish, paleontologist, Pennsylvania, prehistoric, river delta nursery, river delta system, saltwater shark migration, sawfish, sensory organs, shark migration, shark nurseries, tiger sharks, university of chicago, university of michigan, upper midwest, vertebrate paleontology

ANN ARBOR — Like salmon in reverse, long-snouted Bandringa sharks migrated downstream from freshwater swamps to a tropical coastline to spawn 310 million years ago, leaving behind fossil evidence of one of the earliest known shark nurseries.

That’s the surprising conclusion of University of Michigan paleontologist Lauren Sallan and a University of Chicago colleague, who reanalyzed all known specimens of Bandringa, a bottom-feeding predator that lived in an ancient river delta system that spanned what is today the Upper Midwest. (more…)

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Ancient sharks reared young in prehistoric river-delta nursery

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