Gyptis propinqua Marion & Bobretzky, 1875
Nomenclature: Gyptis propinqua Marion & Bobretzky, 1875 | Oxydromus propinquus (Marion & Bobretzky, 1875)
Notes: Type locality: Mediterranean (France). Hesione splendida Savigny in Lamarck, 1818
Nomenclature: Hesione pantherina Risso, 1826 | Hesione splendida Savigny in Lamarck, 1818
Notes: Hesione species display a high colour variability and it is currently unknown whether these are colour morphs of the same species or belong to different species (Mikac 2015, Jimi et al. 2017). For this reason, the status of Hesione pantherina, Hesione splendida and similar species is still unclear; here we follow the opinion of F.
Pleijel (pers. comm. to Mikac 2015) and list occurrences of Hesione pantherina under Hesione splendida.
Hesionides arenaria Friedrich, 1937
Notes: Schmidt and Westheide (2000) assess the genetic differentiation of worldwide Hesionides arenaria populations. Specimens from Crete group with those from near the type locality in the North Sea, indicating the presence of Hesionides arenaria sensu stricto in Greece.
Hesionides gohari Hartmann-Schröder, 1960
Notes: Species complex. Schmidt and Westheide (1999) recover three genetic lineages from worldwide localities which could correspond to cryptic species. Specimens from Crete group with those from near the type locality in the Red Sea, indicating the presence of Hesionides gohari sensu stricto in Greece.
Hesiospina aurantiaca (M. Sars, 1862)
Nomenclature: Hesiospina aurantiaca (M. Sars, 1862) | Hesiospina similis (Hessle, 1925)
Notes: Frequently reported from Greece, considered cosmopolitan (Pleijel 2004). Simboura (1996) notes morphological differences between specimens of Hesiospina similis from the Mediterranean and from the native range (Japan). Specifically, Mediterranean material exhibits a stronger serration of the blades of the compound chaetae and neuropodial aciculae with rounded instead of tapering tips.
Leocrates atlanticus (McIntosh, 1885)
Notes: Reported by von Marenzeller (1902) from deep waters (808 m) off Milos. Marenzeller's two specimens (Natural History Museum Vienna, Inv. No. 599, Acq. No. 15503) were examined by S. Faulwetter. One specimen was confirmed as Leocrates atlanticus; in the second specimen the jaws could not be observed without dissection and its identity is not confirmed.
Leocrates claparedii (Costa in Claparède, 1868)
Notes: Synonymised by Hartman (1965a) with Leocrates chinensis Kinberg, 1866, Leocrates claparedii was reported under the former name for several years (see also remarks in Table 1), therefore listed in inventories of non-native species in the Mediterranean (e.g. Zenetos et al. 2010). Pleijel (1998), in his revision of the Hesionidae, considers the two species distinct. Type locality: Mediterranean (Gulf of Naples).
Microphthalmus aberrans (Webster & Benedict, 1887)
Notes: Questionable status. Reported from Greece by Akoumianaki and Hughes (1997), also found by Papageorgiou et al. (2006) (unpublished data), but Microphthalmus aberrans is a taxonomically confused species. Riser (2000) revised the species and found the slides of the type material to be comprised of two different species. He assigned specimens previously assigned to Microphthalmus aberrans to three species: Microphthalmus aberrans, Microphthalmus pettiboneae Riser, 2000 and Microphthalmus aggregatus Riser, 2000. However, the species re-described as Microphthalmus aberrans by Riser does not resemble previously available descriptions of the species, as those were mostly copied from a re-description by Southern (1914), which was based on the wrong microscope slide. The specimen on this slide was re- described as Microphthalmus pettiboneae by Riser, causing confusion in the application of the name Microphthalmus aberrans. All specimens reported under this name would need to be re-investigated to clarify their identity.
Microphthalmus fragilis Bobretzky, 1870
Notes: Reported from Greece by Koukouras (1979), also found by Papageorgiou et al. (2006) (unpublished data). In the Mediterranean also known from Italy (Castelli et al. 2008), otherwise distributed in the Black and North Seas.
Microphthalmus pseudoaberrans Campoy & Vieitez, 1982
Notes: Reported from Greece by NCMR (1995) and NCMR (2000a). In the Mediterranean also known from Spain (Capaccioni-Azzati and Torres-Gavila 1989), otherwise distributed along the Atlantic coast of the Iberian Peninsula.
Microphthalmus sczelkowii Metschnikow, 1865
Notes: Reported from Greece by Dando et al. (1995). In the Mediterranean also known from Egypt (Dorgham et al. 2013), otherwise distributed in the Black Sea, North Sea and East coast of North America.
Microphthalmus tyrrhenicus Zunareli-Vandini, 1967
Notes: New record for Greece. One specimen, Elafonisi, Crete, 35°16'20.7"N, 23° 32'15.9"E, 1 m depth, fine sand, collected in the framework of the MEDCORE project (unpublished data from Papageorgiou et al. 2006). Literature used for identification: Zunarelli (1967), Sordino (1990). Type locality: Mediterranean (Leghorn coast, Italy). Neogyptis mediterranea (Pleijel, 1993)
Notes: Reported from Greece by Chatzigeorgiou et al. (2016). Type locality: Mediterranean (Banyuls-sur-Mer, France).
Nereimyra punctata (Müller, 1788)
Notes: Questionable status. Pleijel et al. (2012) consider the status of the species in the Mediterranean doubtful, as no specimens could be recovered from typical habitats despite intense sampling. Based on examination of other specimens, the authors conclude that the species is probably restricted to boreal regions. Records from the Adriatic and the Sea of Marmara are likewise considered questionable by Mikac (2015) and Çınar et al. (2014) respectively.
Oxydromus agilis (Ehlers, 1864)
Nomenclature: Ophiodromus agilis (Ehlers, 1864)
Notes: Questionable status. Reported from Greece by Nicolaidou et al. (1990). Type locality: Mediterranean (Martinscica, Adriatic). While it is possible that the species occurs in Greece, it has so far only been reported in grey literature and has not been found in over three decades, therefore its presence in Greece is here considered questionable.
Oxydromus flexuosus (Delle Chiaje, 1827)
Nomenclature: Ophiodromus flexuosus (Delle Chiaje, 1827) Notes: Type locality: Mediterranean (Gulf of Naples). Oxydromus pallidus Claparède, 1864
Nomenclature: Ophiodromus pallidus (Claparède, 1864) | Podarke pallida (Claparède, 1864)
Notes: Type locality: Mediterranean (Port-Vendres, France). Podarkeopsis capensis (Day, 1963)
Nomenclature: Gyptis capensis (Day, 1963) | Podarkeopsis capensis (Day, 1963) Notes: May have been confused with Podarkeopsis galangaui Laubier 1961 or Podarkeopsis arenicolus (La Greca, 1946), both native to the area but not included in any keys for the region and therefore probably underreported (Pleijel 2005). Reported from the Mediterranean, European Atlantic coasts and South Africa, considered questionable in Turkey by Çınar et al. (2014).
Podarkeopsis galangaui Laubier, 1961
Notes: Reported from Greece by Arvanitidis (1994) based on a single specimen. Type locality: Mediterranean (Banyuls-sur-Mer, France). Pleijel (1998) considers the species a junior synonym of Podarkeopsis arenicolus (La Greca, 1946) but does not provide details and does not formalise the synonymy. As Rizzo and Salazar-Vallejo (2014) list both species in their key and recognise difference in the size of the eyes, length of the median antenna and chaetal details, the species is therefore treated as valid here, pending further information.
Psamathe fusca Johnston, 1836
Nomenclature: Kefersteinia cirrhata (Keferstein, 1862) Syllidia armata Quatrefages, 1866
Nomenclature: Magalia perarmata Marion & Bobretzky, 1874 | Syllidia armata Quatrefages, 1866