*hystrix (Bagnall, 1940)
Lathriopyga longiseta is a highly distinctive purple collembolan (Fig. 1) known as Neanura hystrix in earlier literature. The body setae are very long (Figs. 2, 3), there are two ocelli on each side of the head (though these are hard to see, being partly hidden among the cauliflower-like tubercles that cover its head and much of the body). There is no furca, and the growth form of the setae is distinctive, with a solitary thick yellow seta projecting from the middle of each tubercle on the body.
Lathriopyga longiseta has recently turned up in several sites including damp woodland and ornamental gardens and is likely to be present widely throughout the UK. In September 2003, Steve Hopkin thought it noteworthy that he had found several specimens on the underside of fallen branches on the ground at Trengwainton Gardens (National Trust) in West Cornwall. In 2009 Suzi Crone found the first specimens for Ireland at two widely separated locations in Belfast, and Elva Robinson found one in an ants nest on the Lancashire coast, suggesting that this species is expanding its range.