(ofSpirorbis (Laeospira) medius Pixell, 1912)Pixell, Helen L. M. (1912). Polychaeta from the Pacific coast of North America. Part I. Serpulidae, with a revised table of classification of the genus Spirorbis. <em>Proceedings of the Zoological Society of London.</em> [1912 part 3-4]: 784-805, plates 87-89 [follow p.784]., available online athttp://biodiversitylibrary.org/page/32119350[details]
Read, G.; Fauchald, K. (Ed.) (2024). World Polychaeta Database. Sinistrella media (Pixell, 1912). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=464453 on 2024-05-02
original description(ofSpirorbis (Laeospira) medius Pixell, 1912)Pixell, Helen L. M. (1912). Polychaeta from the Pacific coast of North America. Part I. Serpulidae, with a revised table of classification of the genus Spirorbis. <em>Proceedings of the Zoological Society of London.</em> [1912 part 3-4]: 784-805, plates 87-89 [follow p.784]., available online athttp://biodiversitylibrary.org/page/32119350[details]