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250 Francs CFA Pterygotus
| Issuer | Senegal |
|---|---|
| Year | 2022 |
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| Orientation | Medal alignment ↑↑ |
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| Reverse description | The reverse presents a detailed high-relief depiction of a Pterygotus, the giant extinct eurypterid sea scorpion, shown in a naturalistic underwater scene occupying the central and lower field. The creature's large compound eye, segmented body, and serrated chelicerae are rendered with fine sculptural detail against a rocky aquatic substrate. The legend 'PREDATORS - PTERYGOTUS' arcs along the upper periphery, with the word 'EXTINCT' and the year '2023' inscribed beneath in the upper field. The fineness and weight inscription '1/2 G .9999 FINEST GOLD' appears along the lower left portion of the field in incuse lettering. |
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| Reverse lettering | PREDATORS - PTERYGOTUS - EXTINCT - 2022 1/2 G.9999 FINEST GOLD |
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| Additional information |
Pterygotus was a genus of eurypterid — a sea scorpion — that reached nearly two and a half meters in length, making it among the largest arthropods ever documented in the fossil record. It went extinct roughly 370 million years ago at the end of the Devonian. Senegal's use of it here continues a pattern of CFA-zone microgold issues that target the collector market almost exclusively, bearing no practical relationship to the issuing nation's economic or natural history.