| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 1537 | Knauss, E.B. and R.M. Rieger 1979 Fine structure of the male reproductive system in two species of Haplognathia Sterrer (Gnathostomulida, Filospermoidea). Zoomorphologie 94:33-48. | 1979 | Haplognathia lyra | 34 |
| 19 | Bisby, F.A., M.A. Ruggiero, K.L. Wilson, M. Cachuela-Palacio, S.W. Kimani, Y.R. Roskov, A. Soulier-Perkins and J. van Hertum 2005 Species 2000 & ITIS Catalogue of Life: 2005 Annual Checklist. CD-ROM; Species 2000: Reading, U.K. | 2005 | Haplognathia lyra | --> |