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Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China.
PLoS One. 2013; 8(8):e69375.Plos

Abstract

BACKGROUND

The Late Cretaceous titanosauriform sauropod Huabeisaurus allocotus Pang and Cheng is known from teeth and much of the postcranial skeleton. Its completeness makes it an important taxon for integrating and interpreting anatomical observations from more fragmentary Cretaceous East Asian sauropods and for understanding titanosauriform evolution in general.

METHODOLOGY/PRINCIPAL FINDINGS

We present a detailed redescription of Huabeisaurus allocotus and a suite of anatomical comparisons with other titanosauriforms that demonstrate its validity via autapomorphies (e.g., division of some presacral vertebral laminae, reduced development of caudal ribs, the development of fossae relative to one another in caudal vertebral neural arches, high tibia-to-femur ratio). Huabeisaurus shares many features with other Cretaceous East Asian sauropods (e.g., pendant cervical ribs, anterior-middle caudal vertebrae with a nearly flat anterior centrum face and a concave posterior centrum face) that are absent in sauropods from other landmasses and strata, suggesting a close relationship among many of these forms within the clade Somphospondyli.

CONCLUSIONS/SIGNIFICANCE

Restudy of Huabeisaurus provides further evidence for the existence of a clade of somphospondylans--Euhelopodidae--mainly found in the Cretaceous of East Asia. Euhelopodidae represents a fourth example of the evolution of narrow crowns within Sauropoda, along with diplodocoids, brachiosaurids, and advanced titanosaurs (lithostrotians). Despite being known from fewer species than Diplodocoidea, Brachiosauridae, or Lithostrotia, euhelopodids possessed a broader range of tooth shapes than any of these clades, suggesting that euhelopodids exemplified a comparably broad range of feeding strategies and perhaps diets.

Authors+Show Affiliations

Anatomical Sciences Department, Stony Brook University, Health Sciences Center, Stony Brook, New York, United States of America. michael.demic@stonybrook.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23936326

Citation

D'Emic, Michael D., et al. "Osteology of Huabeisaurus Allocotus (Sauropoda: Titanosauriformes) From the Upper Cretaceous of China." PloS One, vol. 8, no. 8, 2013, pp. e69375.
D'Emic MD, Mannion PD, Upchurch P, et al. Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China. PLoS One. 2013;8(8):e69375.
D'Emic, M. D., Mannion, P. D., Upchurch, P., Benson, R. B., Pang, Q., & Zhengwu, C. (2013). Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China. PloS One, 8(8), e69375. https://doi.org/10.1371/journal.pone.0069375
D'Emic MD, et al. Osteology of Huabeisaurus Allocotus (Sauropoda: Titanosauriformes) From the Upper Cretaceous of China. PLoS One. 2013;8(8):e69375. PubMed PMID: 23936326.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Osteology of Huabeisaurus allocotus (Sauropoda: Titanosauriformes) from the Upper Cretaceous of China. AU - D'Emic,Michael D, AU - Mannion,Philip D, AU - Upchurch,Paul, AU - Benson,Roger B J, AU - Pang,Qiqing, AU - Zhengwu,Cheng, Y1 - 2013/08/02/ PY - 2013/03/07/received PY - 2013/06/06/accepted PY - 2013/8/13/entrez PY - 2013/8/13/pubmed PY - 2014/4/29/medline SP - e69375 EP - e69375 JF - PloS one JO - PLoS One VL - 8 IS - 8 N2 - BACKGROUND: The Late Cretaceous titanosauriform sauropod Huabeisaurus allocotus Pang and Cheng is known from teeth and much of the postcranial skeleton. Its completeness makes it an important taxon for integrating and interpreting anatomical observations from more fragmentary Cretaceous East Asian sauropods and for understanding titanosauriform evolution in general. METHODOLOGY/PRINCIPAL FINDINGS: We present a detailed redescription of Huabeisaurus allocotus and a suite of anatomical comparisons with other titanosauriforms that demonstrate its validity via autapomorphies (e.g., division of some presacral vertebral laminae, reduced development of caudal ribs, the development of fossae relative to one another in caudal vertebral neural arches, high tibia-to-femur ratio). Huabeisaurus shares many features with other Cretaceous East Asian sauropods (e.g., pendant cervical ribs, anterior-middle caudal vertebrae with a nearly flat anterior centrum face and a concave posterior centrum face) that are absent in sauropods from other landmasses and strata, suggesting a close relationship among many of these forms within the clade Somphospondyli. CONCLUSIONS/SIGNIFICANCE: Restudy of Huabeisaurus provides further evidence for the existence of a clade of somphospondylans--Euhelopodidae--mainly found in the Cretaceous of East Asia. Euhelopodidae represents a fourth example of the evolution of narrow crowns within Sauropoda, along with diplodocoids, brachiosaurids, and advanced titanosaurs (lithostrotians). Despite being known from fewer species than Diplodocoidea, Brachiosauridae, or Lithostrotia, euhelopodids possessed a broader range of tooth shapes than any of these clades, suggesting that euhelopodids exemplified a comparably broad range of feeding strategies and perhaps diets. SN - 1932-6203 UR - https://www.unboundmedicine.com/medline/citation/23936326/Osteology_of_Huabeisaurus_allocotus__Sauropoda:_Titanosauriformes__from_the_Upper_Cretaceous_of_China_ L2 - https://dx.plos.org/10.1371/journal.pone.0069375 DB - PRIME DP - Unbound Medicine ER -