Pillai, T. Gottfried. 2009. “A Revision of the Genera Galeolaria and Pyrgopolon (Polychaeta: Serpulidae), With Discussions on Opercular Insertion As a Character in Their Taxonomy and Relationships, and Their Zoogeography”. Zootaxa 2060 (1). Auckland, New Zealand:47–58. https://doi.org/10.11646/zootaxa.2060.1.4.