RT Journal Article
T1 Interspecies and intraspecific variability in the trilobites Duyunaspis and Balangia from the Cambrian Series 2 (Stage 4) of Jianhe, South China
A1 Chen, Zhengpeng
A1 Zhao, Yuanlong
A1 Yang, Xinglian
A1 Esteve Serrano, Jorge Vicente
A1 Liu, Xiong
A1 Chen, Shengguang
A1 Feng, Rong
AB Though morphological variation among trilobites has been studied for some time, it is difficult to identify differences between interspecific and intraspecific variations. In this study, the intergeneric, interspecific, and intraspecific variations of the Cambrian oryctocephalid trilobites Duyunaspis and Balangia from Jianhe, South China are analysed using geometric morphometrics. In addition to the number of thoracic segments and the relative size of the pygidium compared to the cephalon mentioned in previous studies, the results in this study suggest that the predominant variation of Duyunaspis and Balangia is the presence or absence of the glabellar furrow. The interspecific variations of Duyunaspis (D. duyunensis, D. paiwuensis and D. jianheensis) mainly lie in the types of facial suture, occipital ring and glabella. Although the differences of D. duyunensis or D. jianheensis from adjacent sections have been observed, these variations may be caused by ontogeny, and do not reach the magnitude of interspecific variations in Duyunaspis. This research provides a better quantitative understanding of the variability in oryctocephalid trilobites.
PB Taylor & Francis
SN 0024-1164
YR 2022
FD 2022
LK https://hdl.handle.net/20.500.14352/72883
UL https://hdl.handle.net/20.500.14352/72883
LA eng
NO National Natural Science Foundation of China
NO Guizhou Bureau of Science and Technology
NO Priority Research Program of Chinese Academy of Sciences
DS Docta Complutense
RD 2 may 2024