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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 implements paperless meeting system
2004-08-20

 

The Management Committee of the University of the Free State ’s (UFS) Executive Management recently entered the electronic environment of more effective and centralised meeting and decision-making administration by implementing ‘n computerised meeting system.

With this the UFS became the first higher education institution in the world to use the PARNASSUS-meeting management system. PARNASSUS , which refers to a mountain in the Greek mythology, is a licensed system from CIPAL in Belguim – a developer of software for a variety of applications.

“In stead of coming to a weekly management meeting with a file of documentation, each member now walks in with his/her laptop and the whole meeting procedure takes place electronically,” says Prof Sakkie Steyn, Registrar: General at the UFS.

At the same time the secretary registers the minutes point by point on the PARNASSUS programme. At the end of the meeting, after certain technical finishes are done, the minutes are distributed to members of the meeting and their secretaries/office managers. The draft minutes is also distributed to those who must implement decisions and prepare implementation steps. These staff members are given security clearance beforehand.

“The system is unique due to the fact that a translation engine has been built into the agenda and minute system. Agenda items can be submitted in Afrikaans and then automatically be translated in English by means of the interactive translation engine, or vice versa. The same principle applies to the minutes,” says Prof Steyn.

According to Prof Steyn the translation engine was develop with the expert assistance of the UFS’s Unit for Language Facilitation and Empowerment (ULFE). Word strings from previous minutes are now being added to the corpus of the translation engine.

“The system enables the secretary to continuously monitor which points are submitted for the agenda and if these points comply with the set standards namely clear recommendations, background and proposed implementation steps. The agenda is closed at a certain moment and no new points can then be added. The secretary does certain technical finished by means of a final classification of point and annexures. The draft agenda is then sent to the chairperson for approval, after which the agenda is electronically sent to members of the meeting and their secretaries/office managers for preparation,” says Prof Steyn.

“After the minutes have been approved at the next meeting, it is saved on the PARNASSUS decisions data base. The tracing of decisions made during previous meetings can be done by any person with the necessary security clearance. This is different from the past where stacks of documents had to be searched to find a decision,” says Prof Steyn.

According to Prof Steyn the secretariat and meeting administration services at the UFS has now entered a fully virtual and electronic environment. This will enhance effective decision making tremendously. “The PARNASSUS system saves us costs and time and the decentralisation of submissions to meetings lessens the work at centralised points,” says Prof Steyn.

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