Biodiversity in China Zone I Versions ZH2
High-resolution X-ray computed tomography (HRCT) dataset of Mengshanosaurus minimus (Reptilia: Choristodera) from the Lower Cretaceous of Shandong Province, China
Dataset URL >>
: 2021 - 06 - 11
: 2021 - 08 - 17
: 2021 - 08 - 17
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Abstract & Keywords
Abstract: Choristoderes was a group of diapsid reptiles that appeared in the Middle Jurassic and became extinct in the Miocene. In the Early Cretaceous (~140 Ma), a lineage of Choristoderes, called the Neochoristoderes, evolved a gharial-like body plan. Neochoristoderes inhabited shallow water of rivers and lakes; the adults grow to longer than 1 m, with a long snout and sharp teeth for catching fish. Fossil juvenile Neochoristoderes are rarely discovered; therefore, it remains unclear how this lineage developed the specialized long snout through ontogeny. Recently, the smallest individual of Neochoristoderes, Mengshanosaurus minimus,has been reported from the Lower Cretaceous Mengyin Formation of Shandong Province. The holotype is an almost complete fossil skull with a total length of 35 mm, representing a juvenile. This specimen shows the morphology of the Neochoristoderan skull at an early ontogenetic stage. This paper provides a high-resolution X-ray computed tomography (HRCT) dataset of the Mengshanosaurus minimus holotype, including the original CT data with a spatial resolution of 7.5197 μm. The three-dimensional CT model of the Mengshanosaurus minimus skull revealed detailed osteological information for comparative studies with other Neochoristoderes regarding their morphology, systematics, and ontogenetic process. The dataset includes a three-dimensional surface polygon mesh of the Mengshanosaurus minimus skull. This surface model can be optimized for 3D print and used for academic research, education, and scientific outreach.
Keywords: Mengshanosaurus minimus; juvenile; HRCT scan; three-dimensional reconstruction
Dataset Profile
TitleHigh-resolution computed tomography (HRCT) dataset of Mengshanosaurus minimus holotype (IVPG-T002)
Data corresponding authorYI Hongyu (
Data authorsQIN Wanying, YUAN Meng, YI Hongyu
Holotype horizonMengyin Formation, Lower Cretaceous
Holotype localityApproximately 500 m north of Ningjiagou village, Xintai City, Shandong Province, Chinna (35°49′13″N, 117°49′30″E).
CT data spatial resolution7.5197 μm
Data volume14.0 GB
Data format*.pcr, *.tif, *.stl, *.avi.
Data service system<>
Sources of fundingStrategic Priority Research Program of the Chinese Academy of Sciences (XDA19050102, XDB18030504, XDB26000000), the Chinese Academy of Sciences Pioneer Programs, the National Natural Science Foundation of China (Grant No. 41702020 and 41688103).
Dataset compositionThe dataset consists of 4 subsets in total: (1) “slice”, 10.5 GB, consists of a scan parameter document (parameter.pcr) and 5354 original CT slice images (*.tif); (2) “specimen photo and CT model”, 362 MB, includes a photo of the holotype specimen (holotype photo.tif) and an image showing the CT model in various views (Mengshanosaurus minumus CT model.tif);(3) "”, 2.30 GB, includes three video documents showing the three-dimensional CT model of the skull spinning around roll, pitch, and yaw axes (*.avi);(4) "skull polygon mesh.stl”, 881 MB, is a three-dimensional surface model of the holotype skull.
Article and author information
Wanying Qin
Meng Yuan
Hongyu Yi
Publication records
Released: Aug. 17, 2021 ( VersionsZH2