|Scientific name||Arthropleura armata|
|Home era||Late Carboniferous to Early Permian|
|Appearances|| Episode 1.2|
Episode 2.1 (flashback)
An anomaly opens in the London Underground, letting thru a hudnred arachnids and a Arthropleura. One attacked Stephen, Abby and Cutter, cornering Cutter into a sewer system.
Later, when Stephen went down to save Cutter, he attacked it with a bottle of flame, that was sucked into the anomaly, and the Arthropleura attacked Stephen and was poisoned.
Cutter, Ryan, and Connor tracked down the Arthropleura for a sample of its venom, and after getting the sample, it was shot at, and finally electrocuted, and died as a result.