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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

Neonatal Care Unit receives donation to expand capacity
2015-10-28

  

With the best care and technology available,
the survival rate of premature
babies is about 85%. The neonatal intensive
care unit at the Universitas hospital can now
expand its capacity thanks to a donation of
R1 million by the Discovery fund.
From the left is Prof André Venter.
Head: Department of Paediatrics and
Child Health at the UFS, and mrs Ruth Lewin,
Head: Corporate Sustainability at Discovery. 

The smallest people need the greatest care. This care is being provided by the neonatal unit in the Children’s Wing of the Universitas Hospital. This project of the University of the Free State (UFS), under the leadership of Prof Andre Venter, has led to several miracles regarding child health since its inception.

Now, thanks to a donation of R1 million rand from the Discovery fund, this unit can expand its capacity and treat more premature babies.

About 14% of babies in South Africa are born before the 37th week of pregnancy. These babies are born with a very low birth weight, and are in need of critical care. The neonatal intensive-care unit at Universitas Hospital is currently equipped to take care of about 14 premature babies at a time, from birth to discharge. However, because of the high incidence of premature births in the hospital’s service area, the unit needs about 45 beds.

The aim of the Children’s Wing Project is to expand the neonatal intensive-care unit in order to meet the demands of the hospital’s service area, which reaches as far as the Southern Cape. The Discovery Fund recently donated R1 million to the project, which will be used to expand the capacity of the neonatal intensive-care unit.

“With the best care and technology available, the survival rate of premature babies is about 85%. Without this, half of all premature babies would die,” says Prof Venter, Head: Department of Paediatrics and Child Health at the UFS.

“This is the reason why private and public partnerships, such as the one with Discovery, are essential to make specialised services available to the most vulnerable people. Discovery has made a significant contribution to the project without which we would not have been able to expand the capacity of the unit



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