Dinopedia by Darren Naish

Author:Darren Naish
Language: eng
Format: epub
Publisher: Princeton University Press
Published: 2021-05-28T00:00:00+00:00

Macronarians

The sauropod clade (properly Macronaria), which includes brachiosaurids, titanosaurs, and their close relatives. Until the early 1990s it was mostly agreed that advanced sauropods—the neosauropods—fell into two major groups. One included the slender-toothed, shallow-snouted diplodocoids and titanosaurs, and the other the spatulate-toothed, deep-snouted camarasaurs and brachiosaurids. This interpretation (which had arisen in the 1920s thanks to the work of Werner Janensch) began to fall apart around 1995 when Jorge Calvo and Leonardo Salgado in Argentina pointed out that titanosaurs had more in common with camarasaurs and brachiosaurids than with diplodocoids. By 1998—when Jeff Wilson and Paul Sereno published their landmark study of sauropod phylogeny—it was obvious that previous work had missed the existence of a major sauropod clade, one of the key features of which are gigantic nostril openings.

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