Patagoniapteris artabeae: A new species of Dipteridacean Fern from the Triassic of Argentina.
[sciencythoughts.blogspot.com]
The Family Dipteridaceae today contains ten species of Ferns divided into two genera, found in tropical and subtropical areas of Asia, Australia, and the Pacific Islands. However, in the past they were much more widespread and diverse, with fossils known from all over the world. The oldest examples appear in the fossil record in the Middle Triassic, leading to speculation that they may have first evolved in the Early Triassic or even the Permian, and they reached their maximum diversity in the Late Triassic and Early Jurassic, after which they appear to have declined throughout the remainder of the Mesozoic, a pattern also seen in many other Fern groups.
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