Polychaetes of Greece: an updated and annotated checklist Author Faulwetter, Sarah Author Simboura, Nomiki Author Katsiaras, Nikolaos Author Chatzigeorgiou, Giorgos Author Arvanitidis, Christos text Biodiversity Data Journal 2017 5 20997 20997 http://dx.doi.org/10.3897/BDJ.5.e20997 journal article http://dx.doi.org/10.3897/BDJ.5.e20997 1314-2828--20997 Sphaerosyllis claparedei Ehlers, 1864 Notes Questionable status. Sphaerosyllis claparedei is a poorly known species. Ehler's original description is detailed overall, but not clear on all characters that are used nowadays to distinguish species (e.g. papillation pattern, shape of chaetae, parapodial glands etc.). The species is not included in the treatise of the family by San Martin (2003) . A character which allegedly distinguishes Sphaerosyllis claparedei from other species of the genus is the presence of a dorsal cirrus on the second chaetiger. However, other species were also originally described with this feature (e.g. Sphaerosyllis hystrix Claparede , 1863) although it is in fact absent (see also remarks under Sphaerosyllis ovigera Langerhans, 1879). Ehlers (1864) also describes the dorsal cirri as having a "knob-like shape" at their tip, at least in the anterior chaetigers. This could be an indication for retractile cirri, as seen in Prosphaerosyllis . As no recent re-descriptions exist which take into account characters used nowadays to distinguish species, the status of the species remains unclear and specimens should be revised. Type locality: Mediterranean (Porto di Lazaretto, Adriatic).