| Referensnr. | Beskrivning | År | Namn | Sida |
|---|---|---|---|---|
| 3705 | Tokioka, T. 1963 Contributions to Japanese Ascidian fauna. XX. The outline of Japanese ascidian fauna as compared with that of the Pacific Coasts of North America. Publ. Seto mar. Biol. Lab. 11:131-156. | 1963 | Styela sigma | --> |
| 2258 | Monniot, F. and C. Monniot 2003 Asicidies de la pente externe et bathyales de l'ouest Pacifique. Zoosystema 25(4):681-749. | 2003 | Styela sigma | 715-717 |
| 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 | Styela sigma | --> |
| 3382 | Sanamyan, K.E. and N.P. Sanamyan 2006 Deep-water ascidians (Tunicata: Ascidiacea) from the northern and western Pacific. Journal of Natural History 40(5-6):307-344. | 2006 | Styela sigma | 319-321 |
| 3477 | MarineSpecies.org 2050 MarineSpecies.org. http://www.marinespecies.org/index.php | 2050 | Styela sigma | --> |