| Reference no. | Description | year | Name used | Page |
|---|---|---|---|---|
| 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 | Didemnum tetrahedrum | --> |
| 2225 | Dias, G.M. and S. Rodrigues 2004 Didemnum tetrahedrum sp. nov., a new Didemnum (Tunicata: Ascidiacea) species from south-eastern Brazil. Journal of the Marine Biological Association of the United Kingdom 84:1227-1228. | 2004 | Didemnum tetrahedrum | 1227-1228 |