| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 429 | Hansson, H.G. 1998 NEAT (North East Atlantic Taxa): South Scandinavian marine "Aschelminth" (except Nematoda, which are treated separately and some other species poor phyla Check-List. Internet pdf Ed., http://www.tmbl.gu.se | 1998 | Haplognathia simplex | 1 |
| 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 simplex | --> |
| 1467 | Sorensen, M.V., W. Sterrer and G. Giribet 2006 Gnathostomulid phylogeny inferred from a combined approach of four molecular loci and morphology. Cladistics 22:32-58. | 2006 | Haplognathia simplex | 35 |
| 3477 | MarineSpecies.org 2050 MarineSpecies.org. http://www.marinespecies.org/index.php | 2050 | Haplognathia simplex | --> |