1. Brinkhurst, R. O., 1971. Phylogeny and classification, 1. In R. O. Brinkhurst and B. G. M. Jamieson (eds.), Aquatic Oligochaeta of the world. Oliver & Boyd, Edinb. 165–177
2. Cook, D. G., 1967. Studies on the Lumbriculidae in Britain. J. Zool., Lond. 153: 353–368.
3. Cook, D. G., 1968. The genera of the family Lumbriculidae and the genus Dorydrilus (Annelida, Oligochaeta). J. Zool., Lond. 156: 273–289.
4. Cook, D. G., 1971. Trichodrilus allegheniensis n.sp. ( Oligochaeta, Lumbriculidae) from a cave in Southern Tennessee. Trans, am. microsc. Soc. 90: 381–383.
5. Cook, D. G., 1975. Cave-dwelling aquatic Oligochaeta (Annelida) from the Eastern United States. Trans, am. microsc. Soc. 94: 24–37.