ERMS taxon details
original description
Pierantoni, U. (1908). Protodrilus. <em>Fauna und Flora des Golfes von Neapel und der angrenzenden Meeres-Abschnitte.</em> 31: 1-226., available online at http://dx.doi.org/10.5962/bhl.title.7346 [details]
additional source
de Kluijver, M. J.; Ingalsuo, S. S.; de Bruyne, R. H. (2000). Macrobenthos of the North Sea [CD-ROM]: 1. Keys to Mollusca and Brachiopoda. <em>World Biodiversity Database CD-ROM Series. Expert Center for Taxonomic Identification (ETI): Amsterdam, The Netherlands. ISBN 3-540-14706-3. 1 cd-rom.</em> (look up in RoR) [details]
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