The specimen had been found inland whereas K. halberti is considered coastal, associated with the high-water line. However, like many pseudoscorpions (they form an order of arachnids), their small size (up to 4mm) and secretive habits, being found under stones, logs, debris etc., this species is poorly understood and it is always possible that it is associated with other habitats as well. So, I consulted the key in Legg & Jones (1988), the standard work on British species (which is very good value from here by the way), bearing in mind that even such a well-respected text may have omissions given the poor level of knowledge regarding the group covered.
|The pseudoscorpion in question, preserved in ethanol|
|The movable finger of the pedipalp pincer showing small blunt teeth along the edge.|
So, I returned to the key and chose the 'smaller chelicerae' branch which took me to the genus Neobisium. This immediately looked promising as the species were of the same size as the specimen, and also showed more or less the same shape of cephalothorax. Indeed, keying it out soon led to the 'common neobisid' N. carcinoides - probably Britiain's commonest pseudoscorpion. The final feature indicating this was the shape of the galea - the small bump on the outside edge near the tip of the 'finger' of the chelicera.
|The movable finger of the chelicera of N. carcinoides. The galea is the small round bump near the tip to the bottom left of the photo and is a low, rounded structure rather than being more highly raised.|
Legg, G. & Jones, R.E. (1988). Pseudoscorpions. Synopses of the British Fauna (New Series) 40: i-vi, 1-159.