Javesella dubia

I've not managed to put a name to all the Javesella I've caught in the past so I've probably encountered this very common species before, but this one was the first I've positively identified. I say positively, but it was a female - a male would have been easier to confirm. However I think the combination of the very dark colouration and the shape of the first gonocoxa are probably sufficient to name it dubia. It came to light (along with a female Javesella pellucida with which the comparison was useful). It was 2.7 mm long.

female Javesella dubia showing vertex, frons and first gonocoxa, Wendling Beck Environment Project (Norfolk, UK), 9th May 2024

This male was from the same place and was identified primarily by the shape of the end of the apical margin of the genital segment.

male Javesella dubia showing frons and end of abdomen from side and end, Wendling Beck Environment Project (Norfolk, UK), 14th July 2024