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Intraspecific variation of trunk segmentation in the oryctocephalid trilobite Duyunaspis duyunensis from the Cambrian (Stage 4, Series 2) of South China
Dai, T1,2,3; Zhang, XL1,2,3; Peng, SC (彭善池)4; Yao, XY5
2017-10
Source PublicationLethaia
ISSN0024-1164
Volume50Issue:4Pages:527-539
Abstract

A detailed exploration of growth and trunk segmentation of the oryctocephalid trilobite, Duyunaspis duyunensis Chang & Chien in Zhou et al. 1977, from the lower Cambrian (Stage 4, Series 2) Balang Formation in western Hunan Province, South China, is presented. Because of the excellent preservation, the complete post-protaspid ontogenetic series from merapsid degree 0 to the holaspid phase is described. The ontogenetic series reveals new information on morphological changes such as the migration of the posterior branch of the facial sutures (from proparian to opisthoparian) and contraction of the posteromedial notch in the pygidium. The abundance of articulated specimens available from a narrow stratigraphical interval makes this material singularly useful for studying the morphogenesis and post-embryonic growth of D. duyunensis in comparison with other oryctocephalids. Strong evidence that multiple numbers of pygidial segment are recognized in each meraspid degree as well as in the holaspid period showed unusual intraspecific variability in the rate of trunk segmentation, providing insights into how Cambrian subisopygous trilobites controlled their body patterning, including size, shape and trunk segment number in both thorax and caudal plate during growth.. Cambrian, China, Corynexochida, ontogeny, segmentation, Trilobita.

DOI10.1111/let.12208
Indexed BySCI
Language英语
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000410680200007
PublisherWILEY
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/13304
Collection中国科学院南京地质古生物研究所
Affiliation1.State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China;
2.Dept Geol, Shaanxi Key Lab Early Life & Environm, Xian 710069, Shaanxi, Peoples R China;
3.Northwest Univ Xian, Xian 710069, Shaanxi, Peoples R China;
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China;
5.Changan Univ, Sch Earth Sci & Land Resources, Key Lab Western Chinas Mineral Resources & Geol E, Minist Educ, Xian 710054, Shaanxi, Peoples R China
Recommended Citation
GB/T 7714
Dai, T,Zhang, XL,Peng, SC ,et al. Intraspecific variation of trunk segmentation in the oryctocephalid trilobite Duyunaspis duyunensis from the Cambrian (Stage 4, Series 2) of South China[J]. Lethaia,2017,50(4):527-539.
APA Dai, T,Zhang, XL,Peng, SC ,&Yao, XY.(2017).Intraspecific variation of trunk segmentation in the oryctocephalid trilobite Duyunaspis duyunensis from the Cambrian (Stage 4, Series 2) of South China.Lethaia,50(4),527-539.
MLA Dai, T,et al."Intraspecific variation of trunk segmentation in the oryctocephalid trilobite Duyunaspis duyunensis from the Cambrian (Stage 4, Series 2) of South China".Lethaia 50.4(2017):527-539.
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