Just out | Chancelloriid Allonnia erjiensis sp. nov. from the Chengjiang Lagerstätte of South China @ Journal of Systematic Palaeontology


Just out @ Journal of Systematic Palaeontology


Chancelloriid Allonnia erjiensis sp. nov. from the Chengjiang Lagerstätte of South China


Author(s)

Hao Yun, Xingliang Zhang & Luoyang Li


Abstract:

The chancelloriid Allonnia erjiensis sp. nov. is described based on articulated specimens from the Chengjiang fossil Lagerstätte (Cambrian Stage 3 of Series 2), South China. A total of 16 specimens, including three complete individuals, have been recognized, all of which are preserved in mudstones and highlighted by reddish iron oxides. Allonnia erjiensis has a conical body equipped with densely arranged 3+0-type sclerites. The body wall integument and sclerite microstructures are visible in some cases. The integument, which is ornamented with microscopic nodes and locally distributed transverse stripes, reflects the complexity and plasticity of the epidermal system. Sclerites with fibrous structures demonstrate their original aragonitic mineral composition. Overall features of Al. erjiensisindicate that the sclerite density needs to be considered when distinguishing the chancelloriid species, and reveal that sclerites with different ray shapes may be present in the same scleritome, which provides new quotable information to study and classify the isolated chancelloriid sclerites from the shelly faunas.


Keywords: Chengjiang LagerstättechancelloriidscleritomeintegumentCambrian


READ IT HERE: http://www.tandfonline.com/doi/full/10.1080/14772019.2017.1311380

Lurdes Fonseca

Assistant Professor and Researcher at University of Lisbon
Sociologist (PhD), Paleontologist (Researcher in Micropaleontology), Majors in Sociology and Biology, Minor in Geology. Main interests in Paleontology: Microfossils, Molecular fossils, Paleobiology and Paleoecology. (read more about me)