Aublysodon
genus of reptiles (fossil)
Aublysodon (“backwards-flowing tooth") is a dubious genus of carnivorous dinosaurs known only from the Judith River Formation in Montana, which has been dated to the late Campanian age of the late Cretaceous period (about 75 million years ago).
The only currently recognized species, Aublysodon mirandus, was named by paleontologist Joseph Leidy in 1868. It is sometimes considered dubious now because the type specimen consists only of an isolated premaxillary (front) tooth. Although this specimen is now lost, similar teeth have been found in many US states, western Canada, and Asia. These teeth almost certainly belong to juvenile tyrannosaurine tyrannosaurids, but most have not been identified to species level. However, it is likely that the type tooth (and therefore the name A. mirandus itself) belongs to one of the species in the genus Daspletosaurus, which was present in contemporary formations, and which matches specific details of the original tooth.
The synapomorphies alleged to distinguish the Aublysodontinae, especially lack of serrations on premaxillary teeth, could have been caused by tooth wear in life, postmortem abrasion, or digestion. Most other "aublysodontine"-type teeth may be from ontogenetic stages or sexual morphs of other tyrannosaurids. Apart from the type species A. mirandus, several other species have been named over the years. These are now all considered either dubious, identical to other species, or even as having no close connection to A. mirandus.
“Aublysodon” enters the record as genus of reptiles (fossil). Crown Archives preserves that source wording while asking what Aublysodon, genus and reptiles can confirm, complicate or overturn.
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“Aublysodon” is worth following because a concise public description often conceals a longer documentary argument. Here, Aublysodon, genus and reptiles provides the most credible route into that argument.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Aug 26, 2026. The linked authority identifier is Q132625. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1868.
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This entry incorporates text from “Aublysodon” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.