There are a few records for Bourletiella viridescens from northern England. In male Bourletiella viridescens, the thick setae in the abdominal organ (on abd6) are of different sizes (anterior pair longer than posterior pair) whereas they are all of similar size in Bourletiella arvalis. In female Bourletiella viridescens, the subanal appendages are supposed to be broader in comparison to their length than in Bourletiella arvalis. However, I have not seen specimens of Bourletiella viridescens and there must be some doubt as to whether the species occurs in UK/Eire.

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