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Arrhinoceratops
 
 
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Arrhinoceratops (meaning "no nose-horn face", derived from the Ancient Greek
Ancient Greek

Ancient Greek is the historical stage in the development of the Greek language spanning across the Archaic Greece , Classical Greece , and Hellenistic civilization periods of ancient Greece and the classical antiquity....
 "a-/a-" "no", rhino-/????- "nose" "cerat-/?e?at-" "horn", "-ops/??" "face") is a genus
Genus

A genus is a low-level taxonomic rank used in the classification of living and fossil organisms. The taxonomic ranks are domain , kingdom , phylum, class , order , family , genus, and species....
 of ceratopsian dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
. The name was coined as its original describer concluded it had no nose-horn, however further analysis revealed this not to be the case. It lived during the early Maastrichtian
Maastrichtian

The Maastrichtian is the last faunal stage of the Cretaceous geologic period, and therefore of the Mesozoic geologic era. It spanned from 70.6 ? 0.6 annum to 65.5 ? 0.3 Ma ....
 stage of the Late Cretaceous
Cretaceous

The Cretaceous , usually abbreviated K for its German translation Kreide, is a geologic period from circa to million years ago . In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period....
, predating its famous relative Triceratops
Triceratops

Triceratops is an extinct genus of herbivore Ceratopsidae dinosaur which lived during the Maastrichtian stage of the Late Cretaceous Period , around 68 to 65 mya in what is now North America....
 by a few million years, although it was contemporary with Anchiceratops
Anchiceratops

Anchiceratops is a genus of chasmosaurinae ceratopsid dinosaur from the Late Cretaceous Period of western North America. Like other ceratopsids, it was a quadrupedal herbivore with three horns on its face, a parrot-like beak, and a long frill extending from the back of its head....
.






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Arrhinoceratops (meaning "no nose-horn face", derived from the Ancient Greek
Ancient Greek

Ancient Greek is the historical stage in the development of the Greek language spanning across the Archaic Greece , Classical Greece , and Hellenistic civilization periods of ancient Greece and the classical antiquity....
 "a-/a-" "no", rhino-/????- "nose" "cerat-/?e?at-" "horn", "-ops/??" "face") is a genus
Genus

A genus is a low-level taxonomic rank used in the classification of living and fossil organisms. The taxonomic ranks are domain , kingdom , phylum, class , order , family , genus, and species....
 of ceratopsian dinosaur
Dinosaur

Dinosaurs were the dominant vertebrate animals of Landform ecosystems for over 160 million years, from the late Triassic Period until the end of the Cretaceous Period , when most of them became extinct in the Cretaceous?Tertiary extinction event....
. The name was coined as its original describer concluded it had no nose-horn, however further analysis revealed this not to be the case. It lived during the early Maastrichtian
Maastrichtian

The Maastrichtian is the last faunal stage of the Cretaceous geologic period, and therefore of the Mesozoic geologic era. It spanned from 70.6 ? 0.6 annum to 65.5 ? 0.3 Ma ....
 stage of the Late Cretaceous
Cretaceous

The Cretaceous , usually abbreviated K for its German translation Kreide, is a geologic period from circa to million years ago . In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period....
, predating its famous relative Triceratops
Triceratops

Triceratops is an extinct genus of herbivore Ceratopsidae dinosaur which lived during the Maastrichtian stage of the Late Cretaceous Period , around 68 to 65 mya in what is now North America....
 by a few million years, although it was contemporary with Anchiceratops
Anchiceratops

Anchiceratops is a genus of chasmosaurinae ceratopsid dinosaur from the Late Cretaceous Period of western North America. Like other ceratopsids, it was a quadrupedal herbivore with three horns on its face, a parrot-like beak, and a long frill extending from the back of its head....
. Its remains have been found in Canada
Canada

Canada is a country occupying most of northern North America, extending from the Atlantic Ocean in the east to the Pacific Ocean in the west and northward into the Arctic Ocean....
.

Discoveries and species

Described by W. A. Parks in 1925, Arrhinoceratops is known from a partially crushed, slightly distorted skull which lacked a lower jaw. The remains were collected from deposits along the Red Deer River
Red Deer River

The Red Deer River is a river in Alberta, Canada. It is a major tributary of the South Saskatchewan River.Red Deer River has a total length of 724 km and a drainage area of 45,100 km?....
 in Alberta
Alberta

Alberta is one of Canada Canadian Prairies Provinces and territories of Canada. It became a province on September 1, 1905.Alberta is located in western Canada, bounded by the provinces of British Columbia to the west and Saskatchewan to the east, the Northwest Territories to the north, and the U.S....
 by a 1923 expedition from the University of Toronto
University of Toronto

The University of Toronto is a public university research university in Toronto, Ontario, Canada, situated a mile north of the city's Financial District, Toronto on grounds that surround Queen's Park ....
.

Only one species is described, A. brachyops. Other material from Utah
Utah

The State of Utah is a western United States U.S. state of the United States. It was the List of U.S. states by date of statehood admitted to the United States on January 4, 1896....
, named by Gilmore in 1946, was originally known as A. utahensis, thence transferred to Torosaurus
Torosaurus

Torosaurus was a genus of Ceratopsidae dinosaur. It had one of the largest skulls of any land animal known, reaching 2.6 metre in length....
.

Classification

Arrhinoceratops belonged to the Ceratopsinae (previously known as Chasmosaurinae) within the Ceratopsia (the name is Ancient Greek for "horned face"), a group of herbivorous dinosaurs with parrot
Parrot

File:Ara ararauna -eating -Wilhelma Zoo-8-2rc.jpgParrots, also known as psittacines , are birds of the roughly 372 species in 86 genus that make up the order Psittaciformes, found in most warm and tropical regions....
-like beaks which thrived in North America
North America

North America is the northern continent of the Americas, situated in the Earth's northern hemisphere and almost totally in the western hemisphere....
 and Asia
Asia

Asia is the world's largest and most populous continent. It covers 8.6% of the Earth's total surface area and, with over 4 billion people, it contains more than 60% of the world's current human population....
 during the Cretaceous Period, which ended roughly 65 million years ago. It appears to be closely related to Torosaurus
Torosaurus

Torosaurus was a genus of Ceratopsidae dinosaur. It had one of the largest skulls of any land animal known, reaching 2.6 metre in length....
.

Physical description

Since this dinosaur is known only from its skull, scientists know little about its over-all anatomy. The skull features a broad neck frill with two oval shaped openings. Its brow horns were moderately long, but its nose horn was shorter and blunter than most Ceratopsians. Its body is assumed to be typical of the Ceratopsians, and based on the skull it is estimated to be long when fully grown.

Diet

Arrhinoceratops, like all Ceratopsians, was a herbivore
Herbivore

Herbivory is a form of predation in which an organism, known as an herbivore, heterotrophs principally autotrophs such as plants, algae and photosynthesizing bacteria....
. During the Cretaceous, flowering plants were "geographically limited on the landscape", and so it is likely that this dinosaur fed on the predominant plants of the era: ferns, cycads and conifers. It would have used its sharp Ceratopsian beak to bite off the leaves or needles.

Related animals

These ceratopsians were close relatives of Arrhinoceratops.

  • Anchiceratops
    Anchiceratops

    Anchiceratops is a genus of chasmosaurinae ceratopsid dinosaur from the Late Cretaceous Period of western North America. Like other ceratopsids, it was a quadrupedal herbivore with three horns on its face, a parrot-like beak, and a long frill extending from the back of its head....
  • Chasmosaurus
    Chasmosaurus

    Chasmosaurus is a genus of Ceratopsidae dinosaur from the Upper Cretaceous Period of North America. Its name means 'opening lizard', referring to the large openings in its frill ....
  • Pentaceratops
    Pentaceratops

    Pentaceratops is a genus of Ceratopsidae dinosaur from the late Cretaceous Period of what is now North America. Its name means "five-horned face", derived from the Ancient Greek "penta/p??ta" meaning 'five', "ceras/???a?" meaning 'horn' and "-ops/??" meaning 'face', in reference to its two long epijugal bone...
  • Torosaurus
    Torosaurus

    Torosaurus was a genus of Ceratopsidae dinosaur. It had one of the largest skulls of any land animal known, reaching 2.6 metre in length....


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