Graciliceratops ‭(‬graceful horned face‭)‬

Short Info

Graciliceratops ‭(‬graceful horned face‭)‬

Phonetic : Gras-sil-i-seh-rah-tops.

Named By : P.‭ ‬C.‭ ‬Sereno‭ ‬-‭ ‬2000

Diet : Herbivore

Size : Estimated 1 – 1.5 meters long

Type of Dinosaur : Ceratopsian

Type Species : G.‭ ‬mongoliensis‭ (‬type‭)

Found in : Mongolia‭ ‬-‭ ‬Shiregin Gashun Formation

When it Lived : Late Cretaceous, 99-84 million years ago

Graciliceratops, which means “slender horn”), is a genus that includes neoceratopsian dinosaurs who lived in Asia during Late Cretaceous.


Graciliceratops Skeleton ReconstructionPaleoNeolitic, CC BY-SA 4.0, via Wikimedia Commons


ZPAL MgD/I/156 was the holotype found at the Bayan Shireh Formation, Mongolia. It came from the Sheergeen Gashoon area near Sainshand. These discoveries were made by the Polish-Mongolian Palaeontological Expedition in 1971. In 1975, Teresa Maryanska, Halszka Olsmolska, and Halszka Osmolska described the specimen and referred it to the genus Microceratops. Paul Sereno pointed out that this specimen had been referred for inexcusable reasons. The genus was not able to diagnose itself, so Microceratops, now called Microceratus, was considered a nomen dubium. He re-described the referred specimen, creating a new genus: Graciliceratops Mongoliensis.

The holotype, which is fragmentary, includes a fragmented skull with dorsals, vertebrae, and four cervicals. It also contains seven sacrals. In reference to the fragile structure of the Graciliceratops, the generic name is Graciliceratops. It derives its Latin name Graciliceratops from the Greek keras (which means horn) and the Greek gracilis (which means slender in Latin). The specific mongolienses name is used to highlight the Mongolian location where it was discovered.

The skull is approximately 20 cm (20 mm) in diameter. However, the arches and centers of the sacral vertebrae have not fused. This indicates that the specimen was probably not fully grown at the time it died. It is 60 cm long (2.0 ft), and weighs between 2.27 and 9.1 kg (5.0 – 20.1 lb). The specimen is immature and the estimated adult size is 2 m (6.6 feet), which is similar to Protoceratops. The frill is characterized by large fenestrae, surrounded by very thin struts. This structure is very similar in appearance to the Protoceratops. The fragile frill and characteristic tibial/femoral ratio of Graciliceratops are indicators that this is Graciliceratops. Seven sacral vertebrae were found and not fused. The scapula has a very gracile constitution, but is thicker at the end of the glenoid. Also, the coracoid is quite large. The humerus is also very thin. The femur is 9.5 cm (95mm) long, has a small head, and is slightly curved. The fourth trochanter, which is placed above the midline of the femoral ends is fragile. The tibia is larger than the femur at 11 cm (110mm). Its proximal and distal articulations are more developed than those of the distally. The right pes is almost complete, with the exception of the IV metatarsal’s distal end. The pedal unguals have a dorsoventrally flattened, somewhat sharply-developed shape.

Source: Wikipedia