Largest arthropod ever
Who
Arthropleura armata
What
2.6 metre(s)
Where
United Kingdom ()
When
The largest arthropod (jointed-limbed invertebrate) currently known is Jaekelopterus rhenaniae, a gigantic species of eurypterid or sea scorpion formally described in November 2007. Based upon the finding of a 46-cm-long (1.51 ft) fossilised chelicera (claw-like mouthpart), the complete animal is estimated to have measured up to 2.6 m (8.53 ft) long.