Brontosaurus Apatosaurus name issue

The dispute about the whether Brontosaurus and Apatosaurus are different or the same seems to be resolved. In recent research it seems like there are two distinct dinosaurs now.

Very roughly, the previous thinking was that the Brontosaurus was a mix up of and bad descriptions of fossils, they looked too similar so didn’t want to have two names. So palaeontologists have re-instated the name Brontosaurus after it was rejected back in the 1970s in preference to Apatosaurus.  Now both names are legitimate to use as both dinosaurs have been better described based on looking at fossils of 6 different Apatosaurus species.

Note from wikipedia

Brontosaurus has long been considered a junior synonym of Apatosaurus, its only species having been reclassified as A. excelsus in 1903. However, an extensive study published in 2015 concluded that Brontosaurus was a valid genus of sauropod distinct from Apatosaurus

 - Apatosaurus - wikipedia

Comparisons of Apatosaurus and Brontosaurus sizes. image: Matt Martyniuk 

More details from 

'Brontosaurus' name resurrected by new dino family tree

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