basis of record
Treadwell, Aaron L. (1914). Polychaetous annelids of the Pacific Coast in the collections of the Zoological Museum of the University of California. <em>University of California Publications in Zoology.</em> 13(8): 175-234, plates 11-12., available online at http://biodiversitylibrary.org/page/34806017 [details]
From editor or global species database
Editor's comment a misidentification of Treadwell, Serpula quadricornis Grube is a synonym of Spirobranchus tetraceros, which taxon has not been reported from the Pac. side of the Americas. [details]