| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 2170 | Hiller, N. 1994 The Environment, Biogeography, and Origin of the Southern African Recent Brachiopod Fauna. Journal of Paleontology, 68(4):776-786. | 1994 | Frenulina cruenta | 778 |
| 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 | Frenulina cruenta | --> |
| 3477 | MarineSpecies.org 2050 MarineSpecies.org. http://www.marinespecies.org/index.php | 2050 | Frenulina cruenta | --> |