'Isotoma vestita' was described by Brown (1923) from specimens extracted from moss at Grindleford, Derbyshire. The description includes the following characters. 8+8 ocelli, PAO broadly oval, tibiotarsus without tenant setae, manubrium with 1+1 ventral apical setae (therefore it must be 'Proisotoma'?), mucro with three teeth, tenaculum with four teeth and 'each of the anterior abdominal segments with a median belt of six, regularly arranged, long, erect, curved, doubly feathered hairs, which are about equal in length to the dorsal length of the segments'. Unfortunately, no types seems to have survived and it is impossible to be certain exactly what Brown had. There are several records by Bagnall for this 'glistening white' species but the slides I have seen in the NHML collection labelled by Bagnall as 'vestita' are all juvenile Pseudisotoma sensibilis.
     The identity of 'Isotoma vestita' Brown (1923) will probably remain a mystery.

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