Pseudachorutes dubius is a relatively large species up to 3.0 mm in length according to Fjellberg (1998). There are a couple of old records by Bagnall (1939) 'a single example 3.0 mm' from Ravenscar and Bagnall (1949) 'two giant specimens from Axwell Park, Blaydon-on-Tyne in Summer 1908' from an 'old notebook'. The only other record is that of Miles (1998) from Wales. It seems odd that such a large and distinctive species has been so infrequently recorded; it may be genuinely rare. There are no specimens in the NHML slide collection. Apart from the large size, the PAO contains 13 to 23 lobes (the other species of Pseudachorutes from UK/Eire have a maximum of 11 lobes). It should be looked for in leaf litter in coniferous and deciduous woodland.

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