Tubes or cell sheet? A 3-D reconstruction of Halysis Høeg, 1932, from the Upper Ordovician of South China

Journal article
(Original article)


Publication Details

Author(s): Frisch K, Munnecke A, Schulbert C, Zhang Y
Journal: Facies
Publication year: 2012
Volume: 59
Journal issue: 59
Pages range: 113-132
ISSN: 0172-9179
Language: English


Abstract


Halysis is a microfossil found in Ordovician to Devonian shallow-marine carbonates. Up to now, it is only known from thin-sections, and therefore its three-dimensional shape and its systematic position are controversial. Halysis is described as a chain-like microfossil with a shape of the single “chain links” ranging from circular to rounded rectangular. Given that Halysis commonly co-occurs with calcareous algae, it is assumed to also be an alga. Interpretations of the anatomy propose a filiform or tubiform shape. Even a unistratose sheet of cells has been discussed. Since Halysis is comparatively rare, its shape has not been resolved up to now. For the present study, 52 out of several hundred specimens from an Upper Ordovician shallow-water limestone of South China have been investigated in detail, which for the first time offers the opportunity to analyze a great number of sections through Halysis. A three-dimensional computer model of Halysis has been constructed in order to set up planes sectioning the model. These simulated sections have been compared to those from Halysis in thin-sections. The results show that Halysis represents a microfossil with a morphology consisting of parallel juxtaposed, partly branching tubes. A single sheet of cells, which was recently proposed as shape of Halysis, can clearly be excluded.



FAU Authors / FAU Editors

Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)
Schulbert, Christian
Lehrstuhl für Paläoumwelt


External institutions
Goethe-Universität Frankfurt am Main
中国科学院国家天文台 (NAOC) / National Astronomical Observatories, Chinese Academy of Sciences


How to cite

APA:
Frisch, K., Munnecke, A., Schulbert, C., & Zhang, Y. (2012). Tubes or cell sheet? A 3-D reconstruction of Halysis Høeg, 1932, from the Upper Ordovician of South China. Facies, 59(59), 113-132. https://dx.doi.org/10.1007/s10347-012-0329-x

MLA:
Frisch, Konstantin, et al. "Tubes or cell sheet? A 3-D reconstruction of Halysis Høeg, 1932, from the Upper Ordovician of South China." Facies 59.59 (2012): 113-132.

BibTeX: 

Last updated on 2018-06-08 at 23:02