Where they were, and when

Two zooms on the same geographic question. Above: a paleogeographic map showing apex predators present on each continent for a chosen period. Below: every species as a bar spanning its known stratigraphic range, grouped by region.

Late Triassic 237–201 Ma Early Jurassic 201–174 Ma Middle Jurassic 174–163 Ma Late Jurassic 163–145 Ma Early Cretaceous 145–100 Ma Late Cretaceous 100–66 Ma

Base map: NASA/Wikimedia (equirectangular). Paleogeographic insets: Mollweide reconstructions by Wikimedia Commons contributors (CC BY-SA). ● land · ■ marine · dashed outline = species to add

Per-species ranges by region

The same species, now drawn as bars across their known stratigraphic ranges, with one row per continent or ocean. Best for reading exactly when each apex existed in each place.

land apex marine apex species ★ to add Bar length = stratigraphic range