Examples of using Achelousaurus in English and their translations into Polish
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Jack Horner led the team that discovered Achelousaurus.
Achelousaurus had 25 to 28 such tooth positions in each maxilla upper jaw bone.
Secondly, Einiosaurus and Achelousaurus are found in strata of a different age.
They compared a small Einiosaurus specimen, MOR 456 8-8-87-1, with Achelousaurus specimen MOR 591.
In all analyses, Achelousaurus and Pachyrhinosaurus were sister groups.
Apart from the skull, no features of the skeleton are known that distinguish Achelousaurus from other members of the Centrosaurinae.
They concluded that Achelousaurus was likely the direct descendant of Einiosaurus.
that there was not enough evidence to conclude that Achelousaurus was a direct descendant of Einiosaurus.
Achelousaurus would then also be the only Campanian ceratopsid known from more than one formation.
In all analyses, Einiosaurus and Achelousaurus are part of the clade Pachyrhinosaurini.
Achelousaurus also differs from Pachyrhinosaurus in its smaller nasal boss that does not reach the frontal bones at its rear.
This suggested to him that the Einiosaurus-Achelousaurus lineage was a separate branch within the Centrosaurinae.
the term"Pachyrhinosaurs" was used for the clade consisting of Achelousaurus and Pachyrhinosaurus.
By definition, Achelousaurus is a member of the clade Pachyrostra(or"thick-snouts"),
According to Andrew McDonald and colleagues, the Achelousaurus finds represented single individuals,
Anthony Russell found Styracosaurus more closely related to Achelousaurus than to Centrosaurus.
Adult Achelousaurus skulls had a rugose,
Sampson gave a formal list of four traits that distinguish Achelousaurus from its centrosaurine relatives.
Achelousaurus specimens are found in the highest levels of the formation, probably closer to
There has been debate about this theory, with later discoveries showing that Achelousaurus is closely related to Pachyrhinosaurus in the group Pachyrhinosaurini.
he named"Taxon C" as a new genus and species, Achelousaurus horneri.
In addition to fossils that have been unequivocally assigned to Achelousaurus, some other material has been found of which the identity is uncertain.
consisting of species more closely related to Pachyrhinosaurus or Achelousaurus than to Centrosaurus.
Achelousaurus exhibited the build of derived("advanced") centrosaurines,
The indeterminate specimen TMP 2002.76.1 is from the Dinosaur Park Formation and, if it belongs to Achelousaurus, the genus would be the stratigraphically oldest known pachyrhinosaurine taxon.
Achelousaurus is known from the Two Medicine Formation,
In 2010, Horner admitted that specimen TMP 2002.76.1 seemed to indicate that Achelousaurus was not descended from Einiosaurus, as it preceded both in age,
In Achelousaurus these epoccipitals, which start as separate skin ossifications
snout MOR 449- may belong to Achelousaurus or the two other roughly contemporary ceratopsids Einiosaurus and Rubeosaurus.
In 1994, Achelousaurus horneri was described and named by Scott D. Sampson; the generic name means"Achelous lizard",
