|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
It was assigned to Coeluridae by Baur (1891); to Macelognathidae by Marsh (1884) and Hay (1902); to Ornithischia by Huene (1909); to Stegosauridae by von Zittel (1911); to Hypsilophodontidae by Kuhn (1964) and Romer (1966); to Crocodilia by Ostrom (1971); to Sphenosuchia by Gohlich et al. (2005); to Crocodylomorpha by Irmis et al. (2013); and to Hallopodidae by Leardi et al. (2017).
|Year||Name and author|
|1884||Macelognathus Marsh p. 341|
|1891||Macellognathus Baur p. 450|
|1902||Macelognathus Hay p. 505|
|1909||Macelognathus Huene p. 18|
|1911||Macelognathus von Zittel p. 295|
|1964||Macelognathus Kuhn p. 7|
|1966||Marcellognathus Romer p. 370|
|2005||Macelognathus Gohlich et al.|
|2013||Macelognathus Irmis et al.|
|2017||Macelognathus Leardi et al. p. 5|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.