Arctonoe fragilis är en ringmaskart som först beskrevs av Baird 1863. Arctonoe fragilis ingår i släktet Arctonoe och familjen Polynoidae. Inga underarter finns listade i Catalogue of Life.
Källor Fauchald, Kristian (2007) World Register of Polychaeta, Hartman, O. (1938) The types of the polychaete worms of the families Polynoidae and Polyodontidae in the United States National Museum and the description of a new genus. Proceedings of the United States National Museum, 86(3046): 107-134., Ruff, R. Eugene (1995) Family Polynoidae Malmgren, 1867. 105-166. IN: Blake, James A., Hilbig, Brigitte, and Scott, Paul H. (Ed.). Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel. Volume 5 - The Annelida Part 2. Polychaeta: Phyllo, WoRMS Polychaeta: World List of Polychaeta. Read G. & Fauchald K., 2010-12-10 Baird, William (1863) Descriptions of several new species of worms belonging to the Annelida Errantia and Sedentaria or Tubicola of Milne Edwards. Proceedings of the Zoological Society of London, 1863: 106-110., Baird, William (1865) Contributions toward a monograph of the species of Annelides belonging to the Aphroditacea, containing a list of the known species, and a description of some new species contained in the national collection of the British Museum. Journal of the Linnean So,
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