Crucigera irregularis

Bush, K.J. (1904 (1905)). Tubicolous annelids of the tribes Sabellides and Serpulides from the Pacific Ocean. <em>Harriman Alaska Expedition.</em> 12: 169-346, plates XXI-XLIV.

Hove, Harry A. ten and Jansen-Jacobs, M. J. 1984. A revision of the genus Crucigera (Polychaeta; Serpulidae); a proposed methodological approach to serpulids, with special reference to the variation in Serpula and Hydroides. 143-180. IN: Hutchings ed., Proceedings of the First International Polychaete Conference, Sydney, Australia, 1983: Sydney, The Linnean Society of New South Wales, p. 143-180.

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].