| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 76885 | Stebbing, T.R.R. 1920 General Catalogue of South African Crustacea (Part X of S.A. Crustacea, for the Marine Investigations in South Africa). Annals of the South African Museum 6:281-593, pls. 15-22. | 1920 | Hapaloptyx difficilis | 263 |
| 833 | Ruppert, E.E., R.S. Fox and R.D. Barnes 2004 Invertebrate Zoology. A functional evolutionary approach. 7th Ed. Brooks/Cole, Thomson Learning learning, Inc. 990 p. | 2004 | Hapaloptyx difficilis | --> |
| 76884 | Baba, K., E. Macpherson, G.C. Poore, S.T. Ahyong, A. Bermudez, P. Cabezas, C.-W. Lin, M. Nizinski, C. Rodrigues and K. Schnabel 2008 Catalogue of squat lobsters of the world (Crustacea: Decapoda: Anomura - families Chirostylidae, Galatheidae and Kiwaidae). Zootaxa 1905:1-220. | 2008 | Hapaloptyx difficilis | 13 |