From History: ~2.4 Billion years ago (+/- 100 million)
About 2 billion years ago, bacteria are added to cells and that group leads to eukaryotes. You are a walking chimera ecosystem made of an Archaea host and trillions of Bacterial power-plants.
Red algae did not descend from green algae. Both lineages split from a shared ancestor about 1.5 billion years ago, then adapted independently to different light environments.
A new fossil can be exciting without being decisive. Right now, H. aff. erectus is best understood as an early European hominin with erectus-like traits, not yet a confirmed direct ancestor of us.