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Description
Diplodocus lonus is one of the most iconical sauropods. Everybody knows that these dinosaurs were originally imagined as semi-aquatic swamp and lake dwellers, so that doesn't need much explanations. Therefore, Diplodocus was reconstructed as a massive beast with sprawled legs, a dragging tail and an erect, swan-like neck. The nares were placed where the nasal openings were - therefore on the roof of the skull.
The swamp-dweller image persisted until the 1980s, when it was recognized that these animals were indeed suited for a live on land with their elephant-like columnar limbs and their lightweight skeleton. Now, Diplodocus was illustrated with erect limbs, but still a dragging tail and an upright neck.
Due to the dinosaur renaissance at the end of the 1980s, Diplodocus was now recognized as a light-build sauropod. Kent Steven raised the hypothesis that it couldn't rise its neck more than 20°, while the tail became raised as high as possible - the suspension bridge model. Then, the shrinkwrapping cult made it even more lankier, sometimes to a ridiculous extent (completely visible shoulder blades, sometimes even conturs of the vertebrae). 2004 Witmer hypothesized that the nostrils were placed farther anterior at the roof of the snout. A misinterpretation of skin impressions lead to the widely distributed image of Diplodocus having a row of keratinous spines along its back, additionally to scutes on its dorsal body.
In 2009, it was recognized that Diplodocus was in indeed able to raise its neck "into the air" Now, in the 2010s, we finally got rid of shrinkwrapping and apply a natural amount of muscling onto the sauropod bodies. Also, it turned out that the spine row was a misinterpretation and that raising the tail straightly from the base of the tail was anatomically not possible. Rather, it made a kurve.

Description
Diplodocus lonus is one of the most iconical sauropods. Everybody knows that these dinosaurs were originally imagined as semi-aquatic swamp and lake dwellers, so that doesn't need much explanations. Therefore, Diplodocus was reconstructed as a massive beast with sprawled legs, a dragging tail and an erect, swan-like neck. The nares were placed where the nasal openings were - therefore on the roof of the skull.
The swamp-dweller image persisted until the 1980s, when it was recognized that these animals were indeed suited for a live on land with their elephant-like columnar limbs and their lightweight skeleton. Now, Diplodocus was illustrated with erect limbs, but still a dragging tail and an upright neck.
Due to the dinosaur renaissance at the end of the 1980s, Diplodocus was now recognized as a light-build sauropod. Kent Steven raised the hypothesis that it couldn't rise its neck more than 20°, while the tail became raised as high as possible - the suspension bridge model. Then, the shrinkwrapping cult made it even more lankier, sometimes to a ridiculous extent (completely visible shoulder blades, sometimes even conturs of the vertebrae). 2004 Witmer hypothesized that the nostrils were placed farther anterior at the roof of the snout. A misinterpretation of skin impressions lead to the widely distributed image of Diplodocus having a row of keratinous spines along its back, additionally to scutes on its dorsal body.
In 2009, it was recognized that Diplodocus was in indeed able to raise its neck "into the air" Now, in the 2010s, we finally got rid of shrinkwrapping and apply a natural amount of muscling onto the sauropod bodies. Also, it turned out that the spine row was a misinterpretation and that raising the tail straightly from the base of the tail was anatomically not possible. Rather, it made a kurve.