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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

Prestigious Helgaard Steyn Prize to be awarded to UFS composer
2010-11-08

 Hans Huyssen.

The composer Hans Huyssen, affiliated with the Department of Music at the University of the Free State (UFS), is to be the current recipient of the prestigious 2010 Helgaard Steyn Prize, the prize-winning work being Huyssen’s Proteus Variations (2006).Annually this award is administered and presented to a selected composer, painter, author, or sculptor by the Universities of the Free State and the North-West on a rotating basis. The judges for this year’s prize were Prof. Bertha Spies, Research Fellow, North-West University, and Professor Extraordinary, University of Pretoria, and Mr Noel Stockton, Senior Lecturer at the University of the Free State.

Hans Huyssen’s musical activities encompass the diverse poles of early and contemporary Western and African music, often in an attempt to assimilate the essential qualities from all these fields. His intense focus on contextuality suggests that he approaches music as a profoundly social force which has a particular role to play in our ‘new’ diversified South African society.

The Proteus Variations were commissioned by the Deutsche Welle Radio for the South African National Youth Orchestra 2006, and were premiered at the Beethoven Bonn Festival during 2006. These variations are described by the composer as “a musical representation of South Africa’s manifold Proteaceae”, named for the Greek god Proteus who, at will, was capable of assuming a spectrum of shapes and appearances. As the composer states: “It is worth noticing that a Protea is South Africa’s national flower. What could be more appropriate in providing a key to an opposite perception and understanding of the country’s diverse cultural expressions? In this regard it is my hope that the Proteus Variations may contribute a little to the wide scope of cultural responses necessary to begin to do justice to the extremely rich tapestry of our immediate cultural and natural surroundings”.

The prize of R170 000 will be awarded to Hans Huyssen by a representative of ABSA Trust, who is one of the trustees of the Helgaard Steyn Trust, in Bloemfontein on 8 November 2010.

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