Menardii

Academic Name: Globorotalia Menardii

Type: Planktonic (Mid-to-deep dweller)

Rarity: Common

Description: If ruber is a casual hoodie, menardii is a high-fashion, oversized sun hat. It is very flat and compressed, looking more like a disc than a ball. The "hoodie" here is flattened out into a series of elegant, sweeping chambers that overlap like a deck of cards spread in a circle. Its most iconic feature is the "keel"—a thick, glassy rim that runs all the way around the edge of the shell, like the sturdy brim of a hat.