''Burianosaurus'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

ornithopod Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (). They represent one of the most successful groups of herbivorous dinosaurs during the Cretaceous. The most primitive members of the group were bipedal and relatively sm ...

dinosaur Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic Geological period, period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the #Evolutio ...

that lived in what is now the

Czech Republic The Czech Republic, also known as Czechia, and historically known as Bohemia, is a landlocked country in Central Europe. The country is bordered by Austria to the south, Germany to the west, Poland to the northeast, and Slovakia to the south ...

(it was found in 2003 near the city of

Kutná Hora Kutná Hora (; ) is a town in the Central Bohemian Region of the Czech Republic. It has about 22,000 inhabitants. The history of Kutná Hora is linked to silver mining, which made it a rich and rapidly developing town. The centre of Kutná Hora, i ...

), being the first validly named dinosaur from that country. The type species, ''B. augustai'', was named in 2017; the genus name honours the Czech palaeoartist

Zdeněk Burian Zdeněk Michael František Burian (11 February 1905 – 1 July 1981) was a Czech painter, book illustrator and palaeoartist. Burian's artwork played a central role in the development of palaeontological reconstruction and he is regarded as one ...

, and the species name honours the Czech palaeontologist Josef Augusta. The

holotype A holotype (Latin: ''holotypus'') is a single physical example (or illustration) of an organism used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of s ...

specimen is a femur discovered in sediments belonging to the Peruc-Korycany Formation in 2003, which was described as possibly belonging to an

iguanodont Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (). They represent one of the most successful groups of herbivore, herbivorous dinosaurs during the Cretaceous. The most primitive members of the group were bipedal and rel ...

in 2005.

Classification

When the fossil was first described in 2005, it was said to be most morphologically similar to Early Cretaceous members of

Iguanodontidae Iguanodontidae is a family of iguanodontians belonging to Styracosterna, a derived clade within Ankylopollexia. The clade is formally defined in the ''PhyloCode'' by Daniel Madzia and colleagues in 2021 as "the largest clade containing '' Igua ...

, as opposed to later taxa such as '' Rhabdodon''. Madzia ''et al.'' (2017), the study which named the genus, ran two

phylogenetic analyses In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as Computational phylogenetics, phylogenetic inference. It infers the relationship among organ ...

to test the relationships of the taxon. The first, based on the matrix of MacDonald ''et al.'' (2012), found it within the

clade In biology, a clade (), also known as a Monophyly, monophyletic group or natural group, is a group of organisms that is composed of a common ancestor and all of its descendants. Clades are the fundamental unit of cladistics, a modern approach t ...

Rhabdodontomorpha Rhabdodontomorpha is a clade of basal iguanodont dinosaurs. This group was named in 2016 in the context of the description, based on Spanish findings of an early member of the Rhabdodontidae. A cladistic analysis was conducted in which it was f ...

, with support very strong for it being outside of

Ankylopollexia Ankylopollexia is an extinct clade of ornithischian dinosaurs that lived from the Late Jurassic to the Late Cretaceous. It is a derived clade of iguanodontian ornithopods and contains the subgroup Styracosterna. The name stems from the Greek wo ...

. The analysis based on the Boyd ''et al.'' (2015) matrix, which they considered more strongly supported, due to better taxon sampling of basal ornithopods and

neornithischia Neornithischia ("new ornithischians") is a clade of the dinosaur order Ornithischia. It is the sister group of the Thyreophora within the clade Genasauria. Neornithischians are united by having a thicker layer of asymmetrical enamel on the insi ...

ns, found it to be one of the most basal ornithopods, sister to the

Iguanodontia Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (). They represent one of the most successful groups of herbivorous dinosaurs during the Cretaceous. The most primitive members of the group were bipedal and relatively sm ...

. Their

cladogram A cladogram (from Greek language, Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an Phylogenetic tree, evolutionary tree because it does not s ...

is reproduced below: Burianosaurus Augustai OC Harfa Praha

References

{{Taxonbar, from=Q11292856 Ornithopoda Dinosaur genera Cenomanian dinosaurs Fossil taxa described in 2018 Dinosaurs of Europe

Classification

See also

References