A new titanosauriform sauropod with an unusual tail from the Lower Cretaceous of northeastern China

Mo, Jinyou; Ma, Feimin; Yu, Yilun; Xu, Xiang

doi:10.1016/j.cretres.2022.105449

Cited by 3 publications

(4 citation statements)

References 49 publications

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Section: Discussionmentioning

confidence: 99%

“…In the Jehol Biota, far fewer sauropods have been reported than theropods and ornithischians (Mo et al, 2023). In the past sixteen years, only three sauropod taxa have been reported in the Yixian Formation of western Liaoning, including Dongbeititan (Wang et al, 2007), Liaoningotitan (Zhou et al, 2018) and Ruixinia (Mo et al, 2023). Additional sauropod remains include several Euhelopus-like titanosauriform teeth also reported from the Yixian Formation of western Liaoning (Barrett and Wang, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…In comparison, sauropods are poorly documented in this biota, especially in the Jehol Biota of Inner Mongolia. Only three sauropod genera have been discovered in the Jehol Biota of western Liaoning, including Dongbeititan (Wang et al, 2007), Liaoningtitan (Zhou et al, 2018) and Ruixinia (Mo et al, 2023). In addition to these taxa, some sauropod teeth have been reported in the Jehol Biota of western Liaoning (Barrett and Wang, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Early‐diverging Titanosauriform (Dinosauria, Sauropoda) Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia, Northeast China

ZHANG,

YIN,

PEI

et al. 2024

Acta Geologica Sinica (Eng)

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Three eusauropod teeth (SDUST‐V1064, PMOL‐AD00176, PMOL‐ADt0005) are reported from the Lower Cretaceous Yixian Formation of Ningcheng, southeastern Inner Mongolia, China. Two of them (SDUST‐V1064, PMOL‐AD00176) are assigned to early‐diverging titanosauriforms in having slightly mesiodistal expansion at the base of the tooth crown, a slenderness index value >2.0 and <4.0, and D‐shaped cross section. Furthermore, SDUST‐V1064 and PMOL‐AD00176 are referred as an Euhelopus‐like titanosauriform on the basis of having a sub‐circular boss on the lingual surface and an asymmetrical crown‐root margin which slants apically, respectively. CT scan data of SDUST‐V1064 reveals new dental information of early‐diverging titanosauriforms, for example, the enamel on the labial side thicker than that on the lingual side, an enamel/dentine ratio of 0.26 and a boss present on the lingual side of the dentine of the crown.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Early‐diverging Titanosauriform (Dinosauria, Sauropoda) Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia, Northeast China

ZHANG,

YIN,

PEI

et al. 2024

Acta Geologica Sinica (Eng)

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“…Sauropods were an emblematic clade of long‐necked dinosaurs that colonized all continents during the Jurassic and Cretaceous (Curry Rogers and Forster 2001; Cerda, Paulina Carabajal, et al, 2012; Ghilardi et al, 2016; Wiersma‐Weyand et al, 2021; Rigby et al, 2021; Díez Díaz, 2022; Mo et al, 2023). Some lineages attained giant sizes, evolving into the largest animals to ever inhabit terrestrial landscapes (Carballido et al, 2017; González Riga et al, 2016; Lacovara et al, 2014; Otero et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

The origin of an invasive air sac system in sauropodomorph dinosaurs

Aureliano

Ghilardi

Müller

et al. 2023

The Anatomical Record

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One of the most remarkable features in sauropod dinosaurs relates to their pneumatized skeletons permeated by a bird‐like air sac system. Many studies described the late evolution and diversification of this trait in mid to late Mesozoic forms but few focused on the origin of the invasive respiratory diverticula in sauropodomorphs. Fortunately, it is possible to solve this thanks to the boom of new species described in the last decade as well as the broad accessibility of new technologies. Here we analyze the unaysaurid sauropodomorph Macrocollum itaquii from the Late Triassic (early Norian) of southern Brazil using micro‐computed tomography. We describe the chronologically oldest and phylogenetically earliest unambiguous evidence of an invasive air sac system in a dinosaur. Surprisingly, this species presented a unique pattern of pneumatization in non‐sauropod sauropodomorphs, with pneumatic foramina in posterior cervical and anterior dorsal vertebrae. This suggests that patterns of pneumatization were not cladistically consistent prior to the arrival of Jurassic eusauropods. Additionally, we describe the protocamerae tissue, a new type of pneumatic tissue with properties of both camellae and camerae. This reverts the previous hypothesis which stated that the skeletal pneumatization first evolved into camarae, and derived into delicate trabecular arrangements. This tissue is evidence of thin camellate‐like tissue developing into larger chambers. Finally, Macrocollum is an example of the gradual evolution of skeletal tissues responding to the fastly specializing Respiratory System of saurischian dinosaurs.

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A new titanosaurian sauropod, Gandititan cavocaudatus gen. et sp. nov., from the Late Cretaceous of southern China

Han,

Yang,

Lou

et al. 2024

Journal of Systematic Palaeontology

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A new titanosauriform sauropod with an unusual tail from the Lower Cretaceous of northeastern China

Cited by 3 publications

References 49 publications

Early‐diverging Titanosauriform (Dinosauria, Sauropoda) Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia, Northeast China

Early‐diverging Titanosauriform (Dinosauria, Sauropoda) Teeth from the Lower Cretaceous Yixian Formation of Southeastern Inner Mongolia, Northeast China

The origin of an invasive air sac system in sauropodomorph dinosaurs

A new titanosaurian sauropod, Gandititan cavocaudatus gen. et sp. nov., from the Late Cretaceous of southern China

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