I've already recorded this species but I like these photos so I wanted to put them up. After labouring over the Sphaeroceridae keys for a while you will finally come to the point where you see the thoracic spines which curve inwards and I think are a unique feature. It's a super-abundant species over strandline seaweed and one sweep over the weed will capture 100s.
The mouth parts I have no words for. They're just outrageous.