Ontogeny of the trilobite Yunnanocephalus yunnanensis from the Chengjiang lagerstätte, lower Cambrian, southwest China

@article{Dai2008OntogenyOT,
  title={Ontogeny of the trilobite Yunnanocephalus yunnanensis from the Chengjiang lagerst{\"a}tte, lower Cambrian, southwest China},
  author={Tao Dai and Xingliang Zhang},
  journal={Alcheringa: An Australasian Journal of Palaeontology},
  year={2008},
  volume={32},
  pages={465 - 468}
}
  • T. Dai, Xingliang Zhang
  • Published 31 October 2008
  • Geology
  • Alcheringa: An Australasian Journal of Palaeontology
THE ADULT MORPHOLOGY of the ptychoparid trilobite Yunnanocephalus yunnanensis (Mansuy, 1912) has been described by many authors (e.g. Zhang 1987, Shu et al. 1995). A recently discovered degree 9 meraspid specimen of this species (Fig. 1A–C) reveals previously undescribed morphological changes through the meraspid – holaspid transition, among which the most prominent is the migration of the posterior portions of the facial suture from proparian to gonatoparian conditions. 
Ontogeny of the redlichiid trilobite Eoredlichia intermediata from the Chengjiang Lagerstätte, lower Cambrian, southwest China
TLDR
The distinction of the thoracic region into two portions can be observed during late meraspid and early holaspid periods, which might be considered as a reference for a better understanding on the relationship of tagmosis and growth segmentation among the Cambrian redlichiid trilobites.
Ontogeny of the articulated yiliangellinine trilobite Zhangshania typica from the lower Cambrian (Series 2, Stage 3) of southern China
TLDR
This new find in the Hongjingshao Formation provides species-based regional correlation across the South China block and Z. typica may provide an important biostratigraphic marker for the base of the traditional Tsanglangpuan Stage.
Intraspecific variation of trunk segmentation in the oryctocephalid trilobite Duyunaspis duyunensis from the Cambrian (Stage 4, Series 2) of South China
TLDR
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.
A Chengjiang-type fossil assemblage from the Hongjingshao Formation (Cambrian Stage 3) at Chenggong, Kunming, Yunnan
A new Chengjiang-type fossil assemblage is reported herein from the lower part of the Hongjingshao Formation at Xiazhuang village of Chenggong, Kunming, Yunnan. The fossil assemblage, named as

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