Mortimer, Kate; Mills, Kimberley; Gil, João. (2022). Re-evaluation of Rostraria bierii Tokioka, 1970 (Annelida) from Seto, Japan as a magelonid, with a review of the Magelonidae of the western Pacific. Acta Oceanologica Sinica. 41(3): 61-69.
The identity of Rostraria bierii, originally described as a larval amphinomid from Cape Setozaki, Pacific coast of Japan, is investigated. Based on the original description and illustrations, reinterpretations conclude the “larva” to represent a partial juvenile or adult magelonid specimen, broken after the first chaetiger. The original figures are compared with several known magelonid species to justify the new placement. The authors suggest the supposed amphinomid larva is a Magelonidae taxon inquirendum. The identity of the species is discussed in line with the current knowledge of the Magelonidae in the western Pacific and a key to all known species within the region is provided to aid identifications. Current gaps in our taxonomic knowledge of the Magelonidae of the western Pacific are highlighted and discussed.