An epipodite-bearing crown-group crustacean from the Lower Cambrian
- Xi-guang Zhang, D. Siveter, D. Waloszek, A. Maas
- Geography, Environmental ScienceNature
- 4 October 2007
The limb morphology and other details of this new species are markedly similar to those of living cephalocarids, branchiopods and copepods and it is assigned to the Eucrustacea, thus representing the first undoubted crown-group crustacean from the early Cambrian.
Phosphatized Bradoriids (Arthropoda) from the Cambrian of China
- Xi-guang Zhang
- Geography
- 23 November 2007
Fuxianhuiid ventral nerve cord and early nervous system evolution in Panarthropoda
- Jie Yang, J. Ortega‐Hernández, Xi-guang Zhang
- BiologyProceedings of the National Academy of Sciences
- 1 March 2016
The fuxianhuiid VNC indicates that ancestral neurological features of Ecdysozoa persisted into derived members of stem-group Euarthropoda but were later lost in crown-group representatives, suggesting the independent secondary loss of cycloneuralian-like neurological characters in Tardigrada and EuARthropoda.
Specialized appendages in fuxianhuiids and the head organization of early euarthropods
- Jie Yang, J. Ortega‐Hernández, N. Butterfield, Xi-guang Zhang
- BiologyNature
- 28 February 2013
The presence of a pair of specialized post-antennal appendages (SPAs) in the fuxianhuiid head, which attach at either side of the posteriorly directed mouth, behind the hypostome, indicates that antenniform deutocerebral appendages with many podomeres are a plesiomorphic feature of the ancestral euarthropod head.
A superarmored lobopodian from the Cambrian of China and early disparity in the evolution of Onychophora
- Jie Yang, J. Ortega‐Hernández, Xi-guang Zhang
- Environmental Science, BiologyProceedings of the National Academy of Sciences
- 29 June 2015
Luolishaniids display the highest degree of limb specialization among Paleozoic lobopodians, constitute more than one-third of the overall morphological disparity of stem group Onychophora, and are substantially more disparate than crown group representatives.
A New View of the Cambrian Arthropod Fuxianhuia
- J. Bergström, X. Hou, Xi-guang Zhang, S. Clausen
- Environmental Science, Geography
- 1 December 2008
Fuxianhuia from the Chengjiang fauna is one of the least derived Cambrian arthropods and it is shown that the head has also a pair of ordinary locomotory limbs and that a number of body segments have more than one pair of legs.
Diminutive trace fossils in the Chengjiang Lagerstätte
- Xi-guang Zhang, J. Bergström, R. Bromley, X. Hou
- Geography, Environmental Science
- 1 December 2007
Diminutive trace fossils described here have been well preserved in connection with certain pliable carapaces or skeletons of the Chengjiang animals. Taphonomic evidence suggests that these traces…
Possible Algal Origin and Life Cycle of Ediacaran Doushantuo Microfossils with Dextral Spiral Structure
- Xi-guang Zhang, B. Pratt
- Geography, Environmental ScienceJournal of Paleontology
- 1 January 2014
Abstract In Ediacaran shallow-water dolomites of the Doushantuo Formation (ca. 570 Ma) of southern China, scarce phosphatized microfossils consisting of clusters of coil-like spheroids called…
A Eucrustacean Metanauplius from the Lower Cambrian
- Xi-guang Zhang, A. Maas, J. Haug, D. Siveter, D. Waloszek
- BiologyCurrent Biology
- 22 June 2010
Embryonic Development of a Middle Cambrian (500 Myr Old) Scalidophoran Worm
- Xi-guang Zhang, B. Pratt, Cen Shen
- BiologyJournal of Paleontology
- 1 September 2011
This new material clarifies the affinity of the first fossilized invertebrate embryos ever described, from the same rocks, which were originally attributed to arthropods, presumably trilobites, and infers likely diversified cleavage patterns for stem members of this group, and yields fresh insight into the embryogenesis of early metazoans as a whole.
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