Limits...
A New Oviraptorid Dinosaur (Dinosauria: Oviraptorosauria) from the Late Cretaceous of Southern China and Its Paleobiogeographical Implications.

Lü J, Pu H, Kobayashi Y, Xu L, Chang H, Shang Y, Liu D, Lee YN, Kundrát M, Shen C - Sci Rep (2015)

Bottom Line: A phylogenetic analysis recovers the new taxon as closely related to the Mongolian Citipati.Six oviraptorid dinosaurs from the Nanxiong Formation (Ganzhou and Nanxiong) are distributed within three clades of the family.Each of the three clades from the Nanxiong Formation has close relatives in Inner Mongolia and Mongolia, and in both places each clade may have had a specific diet or occupied a different ecological niche.

View Article: PubMed Central - PubMed

Affiliation: Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; Key Lab of Stratigraphy and Paleontology, Ministry of Land and Resources of China, Beijing 100037, China.

ABSTRACT
The Ganzhou area of Jiangxi Province, southern China is becoming one of the most productive oviraptorosaurian localities in the world. A new oviraptorid dinosaur was unearthed from the uppermost Upper Cretaceous Nanxiong Formation of Ganzhou area. It is characterized by an anterodorsally sloping occiput and quadrate (a feature shared with Citipati), a circular supratemporal fenestra that is much smaller than the lower temporal fenestra, and a dentary in which the dorsal margin above the external mandibular fenestra is strongly concave ventrally. The position of the anteroventral corner of the external naris in relation to the posterodorsal corner of the antorbital fenestra provides new insight into the craniofacial evolution of oviraptorosaurid dinosaurs. A phylogenetic analysis recovers the new taxon as closely related to the Mongolian Citipati. Six oviraptorid dinosaurs from the Nanxiong Formation (Ganzhou and Nanxiong) are distributed within three clades of the family. Each of the three clades from the Nanxiong Formation has close relatives in Inner Mongolia and Mongolia, and in both places each clade may have had a specific diet or occupied a different ecological niche. Oviraptorid dinosaurs were geographically widespread across Asia in the latest Cretaceous and were an important component of terrestrial ecosystems during this time.

No MeSH data available.


Strict consensus of 60 most parsimonious trees obtained by TNT, based on analysis of 42 taxa and 230 characters, showing the phylogenetic position of Huanansaurus ganzhouensis (Tree length = 533, consistency index = 0.510 and retention index = 0.691).Numbers adjacent to each node are Bremer support values Oviraptorids from Nanxiong Formation are in red.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4489096&req=5

f6: Strict consensus of 60 most parsimonious trees obtained by TNT, based on analysis of 42 taxa and 230 characters, showing the phylogenetic position of Huanansaurus ganzhouensis (Tree length = 533, consistency index = 0.510 and retention index = 0.691).Numbers adjacent to each node are Bremer support values Oviraptorids from Nanxiong Formation are in red.

Mentions: A phylogenetic analysis including 42 taxa (Herrerasaurus, Velociraptor and Archaeopteryx as outgroups; 39 taxa as ingroup) and 230 characters recovers 60 most parsimonious trees. The strict consensus of the most parsimonious trees (Fig. 6) shows that it is almost identical to the tree obtained by Lamanna et al.39 (see Fig. 6A of Lamanna et al.39), except for the clade Ingiinae20, of which the relationships are better resolved. The strict consensus tree indicates that Huanansaurus and other two Mongolian oviraptorids (Citipati osmolskae and the Zamyn Khondt oviraptorid) form a polytomy within the clade of Oviraptoridae (Fig. 6), and that they share one synapomorphy: the angle between the ascending and jugal processes of the quadratojugal is less than 90° (character 41, state 1); Nankangia appears basal to the clade formed by Yulong and Nomingia; Jiangixsaurus and Ganzhousaurus are members of Ingeniinae, the clade proposed by Longrich et al.20.


A New Oviraptorid Dinosaur (Dinosauria: Oviraptorosauria) from the Late Cretaceous of Southern China and Its Paleobiogeographical Implications.

Lü J, Pu H, Kobayashi Y, Xu L, Chang H, Shang Y, Liu D, Lee YN, Kundrát M, Shen C - Sci Rep (2015)

Strict consensus of 60 most parsimonious trees obtained by TNT, based on analysis of 42 taxa and 230 characters, showing the phylogenetic position of Huanansaurus ganzhouensis (Tree length = 533, consistency index = 0.510 and retention index = 0.691).Numbers adjacent to each node are Bremer support values Oviraptorids from Nanxiong Formation are in red.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4489096&req=5

f6: Strict consensus of 60 most parsimonious trees obtained by TNT, based on analysis of 42 taxa and 230 characters, showing the phylogenetic position of Huanansaurus ganzhouensis (Tree length = 533, consistency index = 0.510 and retention index = 0.691).Numbers adjacent to each node are Bremer support values Oviraptorids from Nanxiong Formation are in red.
Mentions: A phylogenetic analysis including 42 taxa (Herrerasaurus, Velociraptor and Archaeopteryx as outgroups; 39 taxa as ingroup) and 230 characters recovers 60 most parsimonious trees. The strict consensus of the most parsimonious trees (Fig. 6) shows that it is almost identical to the tree obtained by Lamanna et al.39 (see Fig. 6A of Lamanna et al.39), except for the clade Ingiinae20, of which the relationships are better resolved. The strict consensus tree indicates that Huanansaurus and other two Mongolian oviraptorids (Citipati osmolskae and the Zamyn Khondt oviraptorid) form a polytomy within the clade of Oviraptoridae (Fig. 6), and that they share one synapomorphy: the angle between the ascending and jugal processes of the quadratojugal is less than 90° (character 41, state 1); Nankangia appears basal to the clade formed by Yulong and Nomingia; Jiangixsaurus and Ganzhousaurus are members of Ingeniinae, the clade proposed by Longrich et al.20.

Bottom Line: A phylogenetic analysis recovers the new taxon as closely related to the Mongolian Citipati.Six oviraptorid dinosaurs from the Nanxiong Formation (Ganzhou and Nanxiong) are distributed within three clades of the family.Each of the three clades from the Nanxiong Formation has close relatives in Inner Mongolia and Mongolia, and in both places each clade may have had a specific diet or occupied a different ecological niche.

View Article: PubMed Central - PubMed

Affiliation: Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China; Key Lab of Stratigraphy and Paleontology, Ministry of Land and Resources of China, Beijing 100037, China.

ABSTRACT
The Ganzhou area of Jiangxi Province, southern China is becoming one of the most productive oviraptorosaurian localities in the world. A new oviraptorid dinosaur was unearthed from the uppermost Upper Cretaceous Nanxiong Formation of Ganzhou area. It is characterized by an anterodorsally sloping occiput and quadrate (a feature shared with Citipati), a circular supratemporal fenestra that is much smaller than the lower temporal fenestra, and a dentary in which the dorsal margin above the external mandibular fenestra is strongly concave ventrally. The position of the anteroventral corner of the external naris in relation to the posterodorsal corner of the antorbital fenestra provides new insight into the craniofacial evolution of oviraptorosaurid dinosaurs. A phylogenetic analysis recovers the new taxon as closely related to the Mongolian Citipati. Six oviraptorid dinosaurs from the Nanxiong Formation (Ganzhou and Nanxiong) are distributed within three clades of the family. Each of the three clades from the Nanxiong Formation has close relatives in Inner Mongolia and Mongolia, and in both places each clade may have had a specific diet or occupied a different ecological niche. Oviraptorid dinosaurs were geographically widespread across Asia in the latest Cretaceous and were an important component of terrestrial ecosystems during this time.

No MeSH data available.