Lamaceratops (lama horned face)
Lamaceratops (lama horned face)
Named By : V. R. Alifanov - 2003
Diet : Herbivore
Size : Estimated 1 meters long
Type of Dinosaur : Ceratopsian
Type Species : L. tereschenkoi (type)
Found in : Mongolia
When it Lived : Late Cretaceous, 85-80 million years ago
Bagaceratops, which means “small-horned faces”, is a genus ceratopsian dinosaur. It lived during the Late Cretaceous in the Barun Goyot Formation. Bagaceratops emerged late in the reigning of the dinosaurs. However, it had a primitive anatomy and retained the small size that was characteristic of early ceratopsians.
Some speculation has swirled that Lamaceratops could be based on fossils referring to Bagaceratops since the 2003 genus name. This is because there are very few differences between Bagaceratops fossils and Lamaceratops holotype fossils. However, Lamaceratops could also be a species not yet identified by Bagaceratops.
In the Gobi Desert, the first remains of Bagaceratops was discovered by a joint expedition of Polish and Mongolian scientists in the 1970s. It was then described by Teresa Maryanska (and Halszka Olsmolska), two of the leading scientists of the expedition. Many of these Bagaceratops specimens can be found at the Polish Paleobiological Institute, Warsaw. ZPAL MgD/126 is the holotype. It is a medium-sized skull found in the Hermiin Tsav area of the Barun Goyot Formation during the Campanian stage, Late Cretaceous. Bagaceratops is the generic name for “small-horned faces” and derives its name from the Greek ceratops = “horned face” and the Mongolian Baga = small. B. rozhdestvenskyi was the only type of this species and was named after Anatoly Konstantinovich Roshdestvensky, a Russian paleontologist.
Bagaceratops can be identified from twenty partial and five complete crania. The longest is 17 cm. The skulls can be found throughout the life stages, with the smallest measuring only 4.7 cm. This makes it easy to understand the stages of growth. The smaller skulls of the juveniles were approximately the same size as a golfball. Only fragmentary evidence of Bagaceratops’ post-cranial anatomy has been found. The juvenile Bagaceratops are now believed to have been Juvenile Remains, initially named Protoceratops kozlowskii and then renamed Breviceratops kozlowskii in 1990 by Kurzanov. Paul Sereno explained this in 2000 by extrapolating that the juvenile Breviceratops would become a mature Bagaceratops.
Lukasz Z Czepinski conducted a study of the nature of the variation in morphology, size, and sizing of Bagaceratops skulls in 2019. He also considered the species Gobiceratops minus, Lamaceratops tereschenkoi and Platyceratops tatarinovi potential growth stages for B. rozhdestvenskyi, and thus, junior synonyms. The genus was not known for many years. However, Bitnara Kim and her colleagues discovered the first skeleton of Bagaceratops in 2007. It was found at the Hermiin Tsav location of the Barun Goyot Formation. KID196 was assigned to the specimen, which includes a partial individual. Czepinski, who described new specimens in 2020 of Bagaceratops or Protoceratops at the Uuden Sair, Zamyn Khond, Barun Goyot Formation and Djadochta Formations, evaluated the implications of these specimens to determine the correlation of fossil sites from the latter formation. One of these specimens, MPC-D100/551B, was considered by Czepinski to be a possible evidence of an anagenetic switch from Protoceratops rozhdestvenskyi to Bagaceratops andrewsi.
Bagaceratops reached an adult size of approximately 1 metre (3.3 feet) in length, 50 cm (1.6 feet) high, and weighed in at around 22 kg (50 lb). Bagaceratops had a shorter frill, which lacked fenestrae, and only ten grinding tooth per jaw. It also had a triangular skull that was more like its close relative, Protoceratops.
Bagaceratops is a later evolution of its older relative, but it retains many of the primitive characteristics. The other similarities between the dinosaurs were that they had similar features, including a common beak, but no browhorns and a prominent horn-like prominence at the snout.