EMBARGO: July 8, 2015 11 AM Pacific / 2 PM Eastern
Horned dinosaur discovery sheds light on nose horn evolution in Triceratops family
Fossils reveal hook-like ornaments on frill and early nose horn
evolution
Scientists have discovered Wendiceratops pinhornensis, a new
species of horned dinosaur based on fossils collected from a
bone bed in southern Alberta, Canada, according to a study
published July 8, 2015 in the open-access journal PLOS ONE by
co-authors David Evans from the Royal Ontario Museum and
Michael Ryan from Cleveland Museum of Natural History.
The new dinosaur, named Wendiceratops pinhornensis, is
described from over 200 bones representing the remains of at
least four individuals, three adults and one juvenile, collected
from a bonebed in southern Alberta, Canada. Wendiceratops
pinhornensis was approximately 20 feet long and weighed
more than a ton. It lived about 79 million years ago, making it one of the oldest known members of the
family of large-bodied horned dinosaurs that includes the famous Triceratops, the Ceratopsidae.
A series of forward-curling hook-like horns adorn the margin of the wide, shield-like frill that projects from
the back of the Wendiceratop skull, considered elaborate by the authors for an early member of the horned
dinosaur family. The nasal bone, although represented by fragmentary specimens, likely supported a
prominent, upright nasal horn. This may represent the earliest documented occurrence of a tall nose horn in
Ceratopsia, possibly shedding light on nose horn evolution in the horned dinosaur family. The addition of
Wendiceratops adds to a growing body of research which suggests high diversity of ceratopsids likely
associated with a rapid evolutionary radiation in the group.
“Wendiceratops helps us understand the early evolution of skull ornamentation in an iconic group of
dinosaurs characterized by their horned faces.” said co-author Dr. David Evans. "The wide frill of
Wendiceratops is ringed by numerous curled horns, the nose had a large, upright horn, and it’s likely there
were horns over the eyes too. The number of gnarly frill projections and horns makes it one of the most
striking horned dinosaurs ever found."
The name Wendiceratops means “Wendy’s horned-face”, and celebrates renowned Alberta fossil hunter
Wendy Sloboda, who discovered the site in 2010.
Adapted by PLOS ONE from release provided by the author
In your coverage please use this URL to provide access to the freely available paper:
http://dx.plos.org/10.1371/journal.pone.0130007
Press-only preview: https://www.plos.org/wp-content/uploads/2015/07/pone-10-7-Evans.pdf
Contact: David Evans, d.evans@utoronto.ca; Jesika Arsenault, Jesikaa@rom.on.ca, ph: 416-586-5547
Citation: Evans DC, Ryan MJ (2015) Cranial Anatomy of Wendiceratops pinhornensis gen. et sp. nov., a
Centrosaurine Ceratopsid (Dinosauria: Ornithischia) from the Oldman Formation (Campanian), Alberta,
Canada, and the Evolution of Ceratopsid Nasal Ornamentation. PLoS ONE 10(7): e0130007.
doi:10.1371/journal.pone.0130007
CAPTION: This is a life reconstruction of Wendiceratops pinhornensis gen. et sp. nov.
CREDIT: Danielle Dufault
Funding: This research was supported by a Natural Sciences and Engineering Research Council of Canada
(http://www.nserc-crsng.gc.ca/index_eng. asp) Discovery Grant to DCE (NSERC Grant File Number: RGPIN
355845, http://www.nserc-crsng.gc. ca/ase-oro/Details-Detailles_eng.asp?id=527922), Royal Ontario
Museum Department of Natural History Fieldwork Grants to DCE, and research grants from the Dinosaur
Research Institute to DCE and MJR. The funders had no role in study design, data collection and analysis,
decision to publish, or preparation of the manuscript.
Competing Interests: The authors have declared that no competing interests exist.
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