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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 appoints new council members
2004-06-07

 

The council of the University of the Free State (UFS) last week appointed two new council members. One of the members, Mrs Busiswa Tshabalala, will represent the Qwaqwa community. It is the first time since the incorporation of the Qwaqwa into the UFS campus last year that a council member was elected to represent the Qwaqwa community.

Mrs Tshabalala obtained her BA Hons in History from the University of the North’s Qwaqwa campus in 1992 and a B Ed degree in leadership management from the UFS in 1998. She was the first female deputy principal at the Harrismith Secondary School (1989-1992) and principal of the Forty Second Hill Teachers’ Centre in the Vrede area office of the Free State Department of Education. In 2001 she was seconded by the Free State Department of Education to coordinate programme 1 and 2 for Link Community Development. She is currently the director of the Thabo Mofutsanyana education district of the Free State Department of Education.

Dr Susan Vosloo, international acclaimed cardiologist, is the other new member of the council. Dr Vosloo, old Kovsie of the year 1989, obtained the MB Chb degree in 1980 at the UFS, an M Med cardiothoracic surgery and in 1998 the FCS (SA) qualification in cardiothoracic surgery at the College of Medicine of South Africa (CMSA). Dr Vosloo’s career extends over a wide spectrum and she specialises in pediatric and adult cardiothoracic surgery. In 1993 she took part in the first heart transplant in Johannesburg at Milpark Hospital, in 1997 she did the first hear-lung transplant at City Park Hospital in Cape Town and in 1997 a heart transplant on a 3-year old child.

She has a cardiothoracic surgery at the Christiaan Barnard Memorial Hospital in Cape Town since 1991 and in also part-time involved with the Red Cross Memorial Hospital in Cape Town.

“It is a great honour for the UFS to welcome two women with so much expertise and experience on the council. Their presence strengthens the UFS’s continued effort to transform the council,” said judge Faan Hancke, chairperson of the UFS council..

Both Mrs Tshabalala and Dr Vosloo’s appointments are until June 2008.

The following council members have been re-elected until June 2008:

Prof Dines Gihwala - vice-chairperson of the council
Dr Nathan Bagarette
Dr Frans Kotzé

Dr Kobus Laubscher was elected by the donors as representative for a further term until June 2008. Me Winifred Hoexter was elected by the Alumni as the third representative. She has been a foundation donor of the UFS since 1997 and committee member of the Kovsie Alumni Trust since 2000. Me Hoexter’s term is until June 2008. The other Alumni representatives are judge Faan Hancke and Mr Jan Grobler, whose term is until June 2006.


Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za

7 June 2004

 

 

Mrs Busiswa Tshabalala

Dr Susan Vosloo

 

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