Knowledge Tree
Relations (1)
cross_type 2.00 — strongly supporting 3 facts
The origin of the Gymnotiformes is linked to Africa through the geological history of continental drift, as their evolutionary timeline is compared to the separation of Africa and South America [1], [2]. While Gymnotiformes are specifically South American, their evolutionary history is geographically contextualized by the historical connection between Africa and South America [3].
Facts (3)
Sources
Comparable Ages for the Independent Origins of Electrogenesis in ... journals.plos.org 3 facts
measurementReconstruction #2 for the origin of the Gymnotiformes and the Mormyroidea crown groups infers their ages to be 143.5 Mya and 124.8 Mya, respectively, which corresponds to the period before the complete separation of Africa and South America.
claimMormyroidea are African weakly electric fishes, and Gymnotiformes are South American weakly electric fishes.
claimThe independent origins of the Mormyroidea and Gymnotiformes occurred at similar times, either slightly postdating or just predating the final separation of Africa and South America by continental drift.