Apparently the last one was too easy, at least for our resident micropaleontologist. I'll explain it later, but before I bury myself in the bitter products of procrastination (known as work that could've been done much earlier at leisure, but instead will be done in a rush of madness right now... the story of my life, pretty much. Sigh), have another mystery micrograph to play with. These are a single genus.
To be referenced later; all scalebars = 1mm