User:Abyssal/Portal:Silurian/DYK/1

... that a fossil of the extinct sea scorpion Eurypterus (restoration pictured) was once thought to be a catfish?
... that the Paleozoic monoplacophoran Pilina unguis was twice as large as any known living monoplacophoran?
... that the extinct trilobite Bumastus (artist's rendition pictured) was named after its resemblance to large grapes?
...that Ornatifilum is likely to be the oldest known fossil fungus?
...that the Silurian Lau extinction event caused the Earth to temporarily return to a condition similar to how it was before multicellular life evolved?