Category: MIL-OSI

Source: The Conversation – Africa – By Valentin Buffa, Postdoctoral Research Fellow in Palaeontology, University of Zurich

The origin of turtles has always been a bit of a puzzle for scientists who study the evolution of animals. To this day, where they fit in the tree of life remains a highly debated topic.

The evolutionary relationships of most vertebrate groups are well understood. Thanks to genetic and morphological (anatomical, body shape) data, even animals with highly specialised skeletons can be clearly placed on the animal family tree. Examples include whales or birds.

Turtles, however, have long remained an exception. Genetic studies identify them as relatives of the so-called archosaurs. This is a group that includes modern birds and crocodiles as well as extinct reptiles like dinosaurs and pterosaurs. But the fossil record seemed to tell a different story. Living turtles and their fossil relatives were so specialised that they offered few clues that would link even the oldest turtle fossils to other reptile groups. Or so scientists thought.

Our international team of palaeontologists has now provided a comprehensive reassessment of the turtle’s place in the animal world. Our analysis sheds new light on the relationships among primitive turtles. It confirms that Eunotosaurus africanus, a fossil from South Africa and Malawi, which was presumed to be a “proto-turtle”, is not a direct ancestor of modern turtles. Instead, this animal is very distantly related to modern reptiles, finding its deep root among much older reptilian ancestors that have no modern representatives.

Based on anatomy, the phylogenetic analysis also provides the first robust support from fossil studies for the close relationship between turtles and the archosaur (bird-crocodilian) lineage.

For more than 20 years, genetic data and anatomical data reached different conclusions about the relationships of turtles. Now they agree.

Comparing reptile anatomy

Fifteen researchers from South Africa, the US, UK, France and Germany participated in the study. Their combined expertise included:

• computed tomography (CT) technology (advanced x-rays)

• reptilian anatomy and phylogenetics

• Permo-Triassic stratigraphy (the study of rock layers where fossils are found).

The combination was critical to obtain these groundbreaking results. Collection staff from the Evolutionary Studies Institute, Iziko South African Museum, National Museum, Albany Museum and Council for Geoscience in South Africa were also instrumental in enabling access to the specimens.

The team painstakingly compiled anatomical comparisons across more than 200 fossil reptile species. We hoped to find previously overlooked similarities between early shelled turtles, their shell-less predecessors, and other early reptiles. Comparisons of the bones that frame the brain cavity were particularly important. These couldn’t previously be seen by scientists, but with powerful CT scanning methods their anatomy was laid bare.

Particularly surprising was what we learned about Eunotosaurus africanus, a 30cm-long burrowing reptile that lived in southern Africa some 260 million years ago. Previous studies considered it as the oldest known member of the turtle family, or a “proto-turtle”. Its broadened trunk and wide ribs looked something like a turtle shell. We studied almost all of the material of Eunotosaurus available in South African collections to address this idea once again.

Our working group at the Evolutionary Studies Institute studies some of the oldest rock layers from the Karoo Basin of South Africa, where Eunotosaurus is found. If Eunotosaurus was indeed a “proto-turtle”, we’d expect to find the forerunners of living lizards, crocodiles or birds (that is, reptiles) in these same layers. Paradoxically, we’ve found no other close relatives of modern reptiles at all. This made us suspect that even if turtles are ancient relatives of living birds and crocodilians, perhaps Eunotosaurus was no “proto-turtle” at all.

One breakthrough was reconstructing the bones of the braincase (housing the brain and ear) from high-resolution x-ray images of fossil and living reptiles. By peering inside the skull of Eunotosaurus, and comparing its bones with those of undisputed fossil turtles, we could see previously out-of-reach aspects of their anatomy for the first time.

These x-ray scans revealed the very primitive anatomy of Eunotosaurus. For example, it has bones in the back of the skull that were lost in turtles and all living reptiles. Features like a slender ear bone (the stapes) and the hooked fifth toe that are present in many living reptiles and other fossil turtles were completely lacking in Eunotosaurus. In contrast, the braincase of unambiguous fossil turtles, such as Proganochelys quenstedti, shared a suite of characteristics that are found in the ancestors of crocodilians and birds, but absent in Eunotosaurus.

These lines of evidence provides firm anatomical support that turtles are the closest living relatives of archosaurs. When Eunotosaurus was considered a “proto-turtle”, many of these features were considered to have evolved independently in the turtle lineage. Now, we show that turtles share these features with their archosaur relatives because they inherited them from a common ancestor.

These new results now place the origin of turtles where it fits better with both fossil and genetic data. When geneticists study living turtles, they compare their DNA to modern birds, crocodiles and lizards to infer evolutionary relationships. Our fossil findings now align with what those genetic comparisons have been suggesting all along: turtles branched off from the same ancestor that gave rise to crocodiles and birds.

Instead of being a living group of relics with ancestors present in the Middle Permian, turtles, like other modern reptiles, diversified and evolved their shell in the Triassic Period, approximately 20 million years after Eunotosaurus was already extinct.

With turtles now firmly placed among their closest living relatives, palaeontologists will need to reassess other long-standing questions about reptile evolution. Advanced imaging techniques like computed tomography should now be applied to other enigmatic fossil groups, potentially clarifying their evolutionary relationships.

Our work highlights the fact that overlooked early reptile fossils, particularly those found in the South African fossil record, may hold the key to understanding reptile relationships.

– Turtles finally have a place in the tree of life: X-ray study of South African fossils was a decider
– https://theconversation.com/turtles-finally-have-a-place-in-the-tree-of-life-x-ray-study-of-south-african-fossils-was-a-decider-282871

Source: The Conversation – Africa – By Rod Crompton, Visiting Adjunct Professor, African Energy Leadership Centre, Wits Business School, University of the Witwatersrand

The supply of crude oil to the world had been reduced by about 7.5% to 10.1% by March 2026 in what the World Bank described as the largest oil market disruption in history. The fall was a result of the attacks on Iran by Israel and the US and the subsequent closure of the Strait of Hormuz.

No country was spared the impact. For some the economic fallout has been dramatic. In the case of South Africa, which imports all its oil and 81% of its petrol, diesel and paraffin consumption, the effects have so far been felt mainly in the price. This has caused the government to subsidise petrol and diesel.

In this article we explore the problems with official data, the mismanagement of strategic stock and the possibility of developing domestic oil and gas supplies.

---

Read more: Iran war is exposing South Africa’s dependency on diesel: what went wrong

---

Both of us have been closely involved in the energy sector for some decades. Rod Crompton teaches and researches the topic. Prior to that he was responsible for fuel price regulation and strategic stocks at the Department of Minerals and Energy before serving 11 years on the board of the National Energy Regulator of South Africa. Bruce Young spent 30 years at the petrochemical giant Sasol before joining academia.

Our analysis of the current situation is that South Africans should be concerned about the fact that the quality of fuel data is very poor and the country only has a rough idea of where it stands in relation to fuel stocks. Based on our reading of the situation it appears that the government doesn’t have much idea of how much trouble it’s in.

As a small player in a large global market, not really knowing how much fuel your country needs is a problem. And not having adequate strategic stocks leaves the country vulnerable to global shortages caused by the Iran war.

The gaps

There are huge challenges in the data about fuel stocks and needs. For example, the Fuels Industry Association of South Africa 2024 annual report data shows that net imports of petrol, diesel and kerosene were 81% of consumption, based on data claiming that diesel imports were 118% of consumption. According to this data set, LPG imports were a staggering 1,685% of consumption. These are obviously highly improbable numbers. The fuels industry data is based on official sources (South African Revenue Service and Department of Mineral Resources and Energy).

In addition, National Treasury is concerned about the discrepancies between actual and reported imports. It is also concerned about illegal “spiking” of diesel with paraffin, which carries a lower tax rate, with cases reaching 68%.

According to the South African Revenue Service, organised criminal networks smuggle and illegally adulterate fuel and many of the fuel-storage and distribution depots are involved in the adulteration of all fuel products. Fuel adulteration costs the fiscus approximately R3.6 billion (US$220.5 million) per year, according to the International Trade Administration Commission.

There are also concerns around stocks of crude oil.

Many countries hold strategic stocks of crude oil for events like the Iran war. The International Energy Agency mandates its member countries to hold 90 days of oil imports. South African policy requires “at least three months total consumption”, taking into account the production of synthetic fuels from coal by Sasol.

South Africa’s strategic crude oil storage capacity is substantial and could meet 88 days of consumption. But tank capacity is not the same as stock.

Strategic stock is kept secret. The country’s Strategic Fuel Fund accounts to Parliament through the portfolio committee on mineral and petroleum resources. Although the quantity of stocks was not disclosed, in its March 2025 report the committee raised concern about “insufficient” strategic fuel reserves.

It seems that South Africa currently holds only about 7.7 million to 8 million barrels. In May 2025 the international news agency Reuters reported that South Africa had strategic crude stocks of about 7.7 million barrels. Local reports have referred to approximately 8 million barrels.

The 8 million barrels would last only about 13 days against total liquid-fuels demand of about 600,000 barrels a day, or about 18 days if output from Sasol’s coal-based output of 150,000 barrels a day was taken into account. Sasol’s coal-to-liquids plants were built in the 1970s and 1980s by the apartheid regime in the face of anti-apartheid oil sanctions. Sasol was gradually privatised from 1979 with substantial state guarantees.

Beyond what’s actually being held in stock there’s an additional problem. Storage is concentrated on the west coast at Saldanha Bay and there’s no readily available means of transporting crude oil across the country to the oil refinery in Sasolburg, which is 1,400km away.

South Africa’s other weak spot when it comes to fuel is a lack of inland storage capacity for refined products. The country imports most of its refined products. Storage capacity is concentrated at the country’s major ports, far away from its industrial heartland.

The need for more strategically placed storage capacity was identified in the Moerane Investigation Panel into Fuel Supply Shortages more than 20 years ago. The panel was established in response to the 2005 fuel supply crisis. The panel recommended that South Africa review its strategic stock policy and strengthen refined product stockholding requirements.

It also noted that the country lacked strategic refined fuel inventories despite increasing dependence on imported petroleum products.

But these recommendations were never acted on.

What role, if any, can the private sector play?

There is provision in the fuel price regulations for oil companies to hold stocks. Producers and importers are paid through the pricing regulations to hold 25 days’ stock and wholesalers 14 days’ stock. But we don’t know if they actually do so as the commercial imperative is to hold as little as possible and the government seems to lack the capacity to police this.

Nor is private-sector storage a substitute. Oil companies and large fuel users do have tanks at refineries, import terminals, depots, airports, mines, farms, factories and logistics sites. But this is mostly operational storage. It is product-specific, commercially committed and designed to keep fuel moving through the supply chain. It is not designed to provide long-duration national cover.

Governance of strategic stocks

The governance of strategic stocks is a sore point.

South Africa has already experienced a major governance failure involving its strategic crude oil reserves. In 2015/16 the state-owned Strategic Fuel Fund sold about 10 million barrels of strategic crude oil to commodity traders including Vitol, Taleveras and Venus Rays. The Western Cape High Court later set the transaction aside, finding that it had been conducted unlawfully and without proper approval or oversight.

Critics argued that the transaction effectively depleted South Africa’s emergency reserves through a secretive and poorly governed process that primarily benefited oil traders and intermediaries.

The episode exposed serious weaknesses in the governance of South Africa’s strategic fuel stocks. These concerns have never fully disappeared. Parliamentary oversight processes in 2025 continued to raise concerns about reserve adequacy, underutilisation of storage infrastructure, fragmented governance arrangements, and unresolved oversight and accountability issues.

Funding strategic stocks involves difficult trade-offs. Given South Africa’s constrained fiscal position, it is not obvious that the state can simply fund a R78 billion (USS$4.7 billion) to R79 billion stock-rebuilding programme from the fiscus. But a purely private solution is also unrealistic. Private firms do not generally have spare strategic-scale storage and will not voluntarily hold large volumes of idle stock.

The likely solution is a hybrid model: better data, a credible state reserve, mandatory and incentivised industry stockholding and policing thereof, levy-funded procurement over time, clear emergency-access rules, transparent reporting and independent oversight.

New finds

The oil crisis makes exploration for oil and gas in the offshore Orange Basin more attractive for the country. The basin lies off South Africa’s west coast. Geologically, it extends into Namibian waters, where oil companies have recently made massive oil and gas finds. There are high hopes in the oil industry that oil will also be found in South African waters.

But it won’t be quick; it will take about 10 years, if successful. There is regulatory uncertainty, ultra-deepwater technical challenges, no existing oil infrastructure, and other countries which oil companies find more attractive.

Despite these difficulties, South Africa will need petrol and diesel for a long time to come. Those concerned about the security of supply of oil and gas should be giving serious thought to removing the obstacles to oil and gas exploration that are holding South Africa back. Namibia has shown that it can be done.

– South Africa’s fuel supply and the Iran war: data black holes and low strategic stock put the country at risk
– https://theconversation.com/south-africas-fuel-supply-and-the-iran-war-data-black-holes-and-low-strategic-stock-put-the-country-at-risk-283913