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A new radiodontan oral cone with a unique combination of anatomical features from the early Cambrian Guanshan Lagerstätte, eastern Yunnan, South China
Han Zeng (曾晗)1,2,3; Fangchen Zhao (赵方臣)1; Zongjun Yin (殷宗军)1; Maoyan Zhu (朱茂炎)1,4
2018
Source PublicationJOURNAL OF PALEONTOLOGY
ISSN0022-3360
Volume92Issue:1Pages:40-48
Abstract

The radiodontans, including anomalocaridids and their allies, are enigmatic stem-group euarthropods and are the most ancient apex giant predators known from the fossil record. Most studies on their feeding behaviors have emphasized their diverse and abundant raptorial frontal appendages, while the oral cone surrounding the mouth opening in these animals has attracted less attention. At present, three oral cone morphotypes are known, from Anomalocaris Whiteaves, 1892, Peytoia Walcott, 1911, and Hurdia Walcott, 1912, respectively. In this paper, we report on a novel form of radiodontan oral cone from the Guanshan Lagerstatte (Cambrian Series 2, Stage 4) in the Wulongqing Formation, eastern Yunnan, South China. This oral cone is unique in combining features seen in Peytoia/Hurdia and Anomalocaris. It possesses a Peytoia/Hurdia-type 'tetraradial' configuration comprising a 32-plate outer ring that consists of four perpendicularly arranged large plates and 28 small plates, in addition to furrowed folds and scale-like nodes on plate surfaces otherwise seen only in Anomalocaris. As an intermediate morphotype, the Guanshan oral cone improves our understanding of the occurrence and morphological disparity of radiodontan oral cones, illuminates future investigations on potentially variable radiodontan feeding mechanisms, and reveals possible evolutionary transformations of these peculiar feeding structures. The resolution of current radiodontan phylogeny would be potentially improved by new knowledge on other body parts apart from frontal appendages in future studies.

KeywordBurgess Shale Anomalocaridid Appendages Chengjiang Biota Arthropod Evolution Classification Morphology Affinity Peytoia Mouth
DOI10.1017/jpa.2017.77
Indexed BySCI
Language英语
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000425398500006
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/14070
Collection中国科学院南京地质古生物研究所
中国科学院南京地质古生物研究所
其他
Corresponding AuthorFangchen Zhao (赵方臣)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, 39 East Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
2.Natl Museum Nat Hist, Dept Paleobiol, POB 37012,MRC 121, Washington, DC 20013 USA
3.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Han Zeng ,Fangchen Zhao ,Zongjun Yin ,et al. A new radiodontan oral cone with a unique combination of anatomical features from the early Cambrian Guanshan Lagerstätte, eastern Yunnan, South China[J]. JOURNAL OF PALEONTOLOGY,2018,92(1):40-48.
APA Han Zeng ,Fangchen Zhao ,Zongjun Yin ,&Maoyan Zhu .(2018).A new radiodontan oral cone with a unique combination of anatomical features from the early Cambrian Guanshan Lagerstätte, eastern Yunnan, South China.JOURNAL OF PALEONTOLOGY,92(1),40-48.
MLA Han Zeng ,et al."A new radiodontan oral cone with a unique combination of anatomical features from the early Cambrian Guanshan Lagerstätte, eastern Yunnan, South China".JOURNAL OF PALEONTOLOGY 92.1(2018):40-48.
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