Named By: Terry A. Gates, Scott D. Sampson, Carlos R. Delgado de Jesús, Lindsay E. Zanno, David Eberth, Rene Hernandez-Rivera, Martha C. Aguillón Martínez & James I Kirkland - 2007.
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, Ornithopoda, Hadrosauridae, Lambeosaurinae.
Species: V. coahuilensis (type).
Size: Estimated around 7.6 meters long for the holotype, adults may have approached around 10 meters long when fully grown.
Known locations: Mexico - Cerro del Pueblo Formation.
Time period: Campanian of the Cretaceous.
Fossil representation: Skull and partial skeleton of a juvenile.
description of Velafrons is based upon the remains
of a juvenile
individual. This has allowed for an increased insight into how
developed as they grew up, though the case of Velafrons
a little different. Most hadrosaurs known from juvenile individuals
show a proportionately large skull in relation to the body size in
younger juveniles, steadily getting smaller as the animal ages and
grows into its adult body. This is also seen in Velafrons,
skull is still quite large for its stage of development. Additionally
the crest is present but small when compared to other genera. What
this means is that Velafrons may have grown at a
different rate to
other lambeosaurine hadrosaurids. Also, the crest of Velafrons
have been smaller than the crests of other genera, though it should
be remembered that since the holotype is of a juvenile, the crest in
adults was likely to be larger and/or slightly different in form.
With an adult size estimated to be around the ten meter long mark, Velafrons was probably around the upper average size for North American hadrosaurs during the Campanian stage of the late Cretaceous. However even though this was quite big, some like Magnapaulia grew quite a bit larger than this. Velafrons is classed as a lambeosaurine hadrosaurid because the crest on its skull is hollow. Out of all the lambeosaurines, Corythosaurus and Hypacrosaurus are considered to be particularly close relatives.
- Velafrons coahuilensis, a new lambeosaurine hadrosaurid (Dinosauria: Ornithopoda) from the Late Campanian Cerro del Pueblo Formation, Coahuila, Mexico, Terry A. Gates, Scott D. Sampson, Carlos R. Delgado de Jesus, Lindsay E. Zanno, David Eberth, Rene Hernandez-Rivera, Martha C. Aguillon Martínez & James I. Kirkland - 2007.