Symphylella isabellae (Grassi, 1886)

Edwards, C.A. (1959). A revision of the British Symphyla. Proceedings of the Zoological Society of London 132: 403-439. 

Hopkin, S.P. & Roberts, A.W. (1988). Symphyla – the least studied of the most interesting soil animals. Bulletin of the British Myriapod Group 5: 28-34.