Knowledge Tree
Relations (1)
cross_type 2.32 — strongly supporting 4 facts
Mormyroidea are identified as African weakly electric fishes [1], and their evolutionary history is intrinsically linked to the geological separation of Africa from South America {fact:1, fact:3, fact:4}.
Facts (4)
Sources
Comparable Ages for the Independent Origins of Electrogenesis in ... journals.plos.org 4 facts
claimThe origin and diversification of crown group Gymnotiformes and Mormyroidea began at the dawn of the independent histories of South America and Africa in the early Late Cretaceous.
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.