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26 April 2018 Photo Supplied
Pretzel-formed fossil of great evolutionary interest
Slab with holotype of Parapsammichnites pretzelifornic from the Urusis Formation, Namibia. Scale bar is 1cm.Picture was taken from Buatois et al., 2018.

The acclaimed scientific journal, Nature, recently published an article about a trace fossil in approximately 543-million-year-old rocks, which elucidates the evolution of the first animals that appeared on Earth and lived in the sea.  

Affiliated Professor in the Department of Geology at the University of the Free State (UFS) Prof Gerard Germs formed part of a team that conducted research with the aim of understanding how the evolution of the first multicellular animals came about and how the Cambrian explosion took place. Prof Germs is of great value to the team for his extended field geological knowledge.

An article which he co-authored was published in the Nature Scientific Reports. The title of the article is: “Sediment disturbance by Ediacaran bulldozers and the roots of the Cambrian explosion”. The international group of writers included authors from Canada, Spain and South Africa. 

Occurrence of the Cambrian explosion
Prof Germs explains the Cambrian explosion: “During the long (4.5-billion-year) history of the Earth, the first life originated and subsequently evolution of plants and animals took place from one-cellular organisms to multicellular vertebrate animals and seed plants. Approximately 573 million years ago the first multicellular animals appeared on the scene. Sometime afterwards, approximately 540 million years ago, a kind of explosion in the origin of many new animal species occurred. This explosion is known as the Cambrian explosion.”

The team studied Earth sediments which are somewhat older than the Cambrian explosion. Such sediments are approximately 573 to 541 million years old and form part of the Ediacaran (late Neoproterozoic) period.

“My discoveries of the past, of among others, the oldest animal with a carbonate skeleton (Cloudina) and of complex horizontal Cambrian-type “worm” tracks (treptichnids) in Ediacaran sediments of Namibia have demonstrated that the Cambrian explosion occurred more gradually than previously thought. This has recently been confirmed in the article that was published in the Nature Scientific Reports.”

Pretzeliformis bulldoze to search for food
According to the article there is evidence that   during the Ediacaran period   worm-like animals such as the Parasammichnites pretzeliformis were already so far developed that they, due to coelom development and size increase, for the first time in the history of the Earth, were able to disturb and bulldoze sediments.  In this way they were able to find a new food source in sea sediments. Bulldozing animals were previously thought to have originated only during and after the Cambrian explosion and not during the older Ediacaran.

“Another major aim of my cooperative research is to improve our knowledge of the geology of the Ediacaran to early Cambrian of South Africa and Namibia. We also intend to establish how the assembly of the supercontinent Gondwana took place. This improved knowledge can be of great future economic interest since large oil, gas and limestone sources occur in Ediacaran-age sediments outside South Africa”.

News Archive

UFS hosts Nobel Laureate
2010-01-15

The University of the Free State (UFS) will host the 1991 Nobel Laureate in Chemistry, Prof. Richard Ernst from Switzerland, on its Main Campus in Bloemfontein from 22-26 January 2010.

Prof. Ernst’s visit to the UFS is part of an extended tour of South African higher education institutions and the National Research Foundation. His visit will coincide with the fourth presentation of the Cheese fondue that had previously been presented with great success in Europe.

The Cheese fondue concept is the brainchild of Prof. Hartmut Frank of the University of Bayreuth in Germany, who is currently a visiting fellow at the UFS Department of Chemistry.

This concept posits that technical advances alone are insufficient for an agreement to be reached on the minimum respect between the various groups and individuals within a society. It proposes that for this to be achieved there has to be a concurrent development of empathy and emotional synergy. In other words, there has to be spiritual acceptance and tolerance of the different cultural or religious ways of coming to terms with the deep-seated need for a spiritual home.

To this effect the UFS will host a Braai Workshop on Saturday, 23 January 2010 to promote this understanding, hence this year’s theme Justice, a matter of respect, ethics and empathy. The invitation to the workshop is open to the public and those who are interested should confirm their attendance with Ms Stefanie Naborn on 051 401 2531 before Monday, 18 January.

Prof. Ernst will present a paper on Justice – the Culture of Responsibility;  Prof. Patrizio Bianchi, the Rector of the University of Ferrara in Italy, will focus on the topic After the Global Crisis: Justice and Wellbeing – the Goals of Economy; while Judge of Appeal, Fritz Brand will talk about Justice – the South African reality.

Prof. Ernst, Prof. Bianchi and Judge Brand will also take part in a panel discussion, together with the Rector and Vice-Chancellor of the UFS Prof. Jonathan Jansen and Prof. Johan Henning, Dean of the UFS Faculty of Law.

Subsequent to that, Prof. Bianchi will present a lecture on the topic Globalisation, Agriculture and Industrial Development in the CR Swart Auditorium on the Main Campus on Monday, 25 January 2010 from 10h00 - 12h00. Prof. Ernst's lecture is from 12h30 - 14h30.

For more information, contact Ms Stefanie Naborn on 051 401 2531 or at nabornsa@ufs.ac.za  or Prof. Aldo Stroebel on 051 401 3506/3403 or at stroebea@ufs.ac.za .

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za  
15 January 2010
 

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