Convoluta punctata Riedl, 1959 | 1952 | litoral | | litoral and marine caves. |
Convoluta sordida Graff, 1882 | 1878 or 1879 | | | |
Convoluta cinereus Graff, 1874 | 1878 or 1879 | | | |
Convoluta paradoxa Ørsted, 1843 | prior to 1882 | | | |
Mesostoma neapolitanum Graff, 1882 | prior to 1882 | | | 1 speciment found between Ulven |
Macrorhynchus naegelii (Kölliker, 1845) | prior to 1882 | | | |
Hyporhynchus setigerus (Schmidt, 1852) | prior to 1882 | | | |
Hyporhynchus penicillatus (Schmidt, 1857) | prior to 1882 | | | everywhere but rare |
Anoplodium schneideri Semper, 1868 | prior to 1882 | | | |
Solenopharynx flavidus Graff, 1882 | prior to 1882 | | | 2 specimens in Ulven (Ulva lactuca). |
Plagiostomum maculatum Graff, 1882 | prior to 1882 | | | in Ulven (Ulva) . |
Plagiostomum reticulatum (Schmidt, 1852) | prior to 1882 | | | in Ulven (Ulva) |
Vorticeros auriculatum (Müller, 1784) | prior to 1882 | | | |
Vorticeros luteum Hallez, 1879 | prior to 1882 | | | |
Monotus lineatus Müller, 1773 | prior to 1882 | | | |
Monotus bipunctatus (Leydig, 1854) | prior to 1882 | | | |
Proporus venenosus (Schmidt, 1852) | 1878 or earlier | | | |
Aphanostoma diversicolor Ørsted, 1845 | 1882 or earlier | | | |
Convoluta paradoxa Ørsted, 1843 | 1866 or earlier | | | |
Plagiostomum girardi (Schmidt, 1857) | 1955 or earlier | | | |
Hofsteniola pardii Papi, 1957 | Oct, Nov 1955 | 2-8 m | | very rare and difficult to find even in areas where it has been found. Found on the plant Posidonia. |
Haplodiscus ussowi Sabussow, 1896 | 1889 | pelagic | | |
Trigonoporus cephalophthalmus Lang, 1884 | prior to 1884 | | | Melobesia zone of Secca di Gajola, Bay of Naples, Italy |
Anonymus virilis Lang, 1884 | prior to 1884 | | | |
Planaria siphunculus Delle Chiaje, 1822 | prior to 1928 | | | |
Graffilla muricicola Ihering, 1880 | 1913 or earlier | | | in the kidney of Murex trunculus L. and Murex brandaris L. Parasite. |
Umagilla forskalensis Wahl, 1909 | 1906 or earlier | | | gut of Holothuria forskalii. |
Umagilla forskalensis Wahl, 1909 | 1953 or earlier | | | gut of Holothuria forskalia. |
Syndesmis echinorum Francois, 1886 | 1913 or earlier | | | in sea urchins [Strongylocentrotus droebachensis (Müll.), S. lividus Brdt., Sphaerechinus granularis A.Ag., Echinus sphaera Müll., E. acutus Lam.] |
Anoplodium parasita Schneider, 1858 | 1953 or earlier | | | parasite in Holothuria tubulosa and Stellata. |
Anoplodium gracile Wahl, 1906 | 1953 or earlier | | | parasite in Holothuria forskalii. |
Anoplodium gracile Wahl, 1906 | 1906 or earlier | | | parasite in Holothuria forskalii Chiaje |
Anoplodium graffi Monticelli1892 | 1892 or earlier | | | parasite in Holothuria impatiens Gm. |
Collastoma minutum Wahl, 1906 | 1906 or earlier | | | in the gut of Phymosoma granulatum F.S. Leuckart. |
Typhlorhynchus nanus Laidlaw, 1902 | 1902 or earlier | | | ectoparasite on Nephthys scolopendroides Chiaje |
Promesostoma marmoratum (Schultze, 1851) | 1913 or earlier | | | very active, in marine and brackish water. |
Promesostoma marmoratum marmoratum (Schultze, 1851) | 1913 or earlier | | | very active, in marine and brackish water. |
Promesostoma marmoratum nudum Graff, 1905 | 1913 or earlier | | | |
Promesostoma ovoideum ovoideum Graff, 1905 | 1913 or earlier | | | |
Promesostoma solea solea Graff, 1905 | 1913 or earlier | | | |
Paramesostoma neapolitanum (Graff, 1882) | 1913 or earlier | | | |
Polycystis mamertina (Graff, 1874) | 1913 or earlier | | | |
Prostomum immundum Schmidt, 1857 | 1857 or earlier | | | |
Mesostomum chlorosticum Schmidt, 1857 | 1857 or earlier | | | |
Plicastoma bimaculatum (Graff,1882) | 1913 or earlier | | | |
Mecynostomum filiferum Ax, 1963 | Apr 1958 | 4 m | sand | Reiner Mittelsand aus 4 m Wassertiefe, vor "Villa Galotti". |
Boreocelis urodasyoides Ax, 1963 | Apr 1958 | 4 m | sand | Reiner Mittelsand aus 4 m Wassertiefe, vor "Villa Galotti". |
Heterochaerus langerhansi (Graff, 1882) | 1952 | | | marine caves. |
Tyrrheniella sigillata Riedl, 1959 | 1952 | 1.0-1.2 m | | marine caves. |
Planocera graffi Lang, 1879 | 1884 or earlier | | | associated with Balanus, Halichondria, Penares, Lithodomus, Halichondria-Astroides. |
Prosthiostomum siphunculus (Delle Chiaje, 1822) | 1828 or earlier | | | associated with Posidonia. |
Leptoplana pallida (Quatrefage, 1845) | 1845 or earlier | | | associated Halimeda-Peyssonelia, Euspongia-Lithodomus. |
Planocera graffi Lang, 1879 | 1884 or earlier | | | associated with Balanus, Halichondria, Penares, Lithodomus, Halichondria-Astroides. |
Ceratopera gracilis (Graff, 1882) | Mar 1958 | | | "Villa Rendel", between Posidonia and algae (Caulerpa, Cryptonemia u.a.). Few specimens. |
Archimonocelis mediterranea Meixner, 1938 | 1938 or earlier | | | Type material was stored the Zoological Museum of Berlin and destroyed during the Second World War. |
Sopharynx typhlops Beklemischev, 1929 | 1929 or earlier | | | |
Lenopharynx languidus Beklemischev, 1929 | 1929 or earlier | | | |
Cestoplana raffaelei Ranzi, 1928 | 1928 or earlier | | | |
Anoplodium pusillum Monticelli, 1892 | 1892 or earlier | | | from body cavity of Holothuria poli. |
Typhlorhynchus nanus Laidlaw, 1902 | 1902 or earlier | | | from Nephthys scolopendroides. |
Cerbussowia cerruti Wilhelmi, 1909 | 1909 or earlier | | | |
Planaria nesidensis Delle Chiaje, 1822 | 1822 or earlier | | | Gulf of Genua and Nizza, Italy. |
Prostheceraeus violaceus (Delle Chiaje, 1822) | 1822 or earlier | | | |
Pseudoceros muelleri (Delle Chiaje, 1829) | 1829 or earlier | | | Naples, Gulf of Naples. |
Macrostomum parthenopeum Beklemischev, 1951 | 1951 | | | |
Haplodiscus ussowi Sabussow, 1896 | 1905 or earlier | | | Golf von Neapel und Messina. |
Proporus venenosus violaceous Graff, 1882 | 1882 or earlier | | | Mittelmeer (Neapel). |
Otocelis rubropunctata (Schmidt, 1852) | 1905 or earlier | | | Mittelmeer (Neapel) |
Syndesmis echinorum Francois, 1886 | 1895 or earlier | | | from Sphaerechinus granularis (Toxopneustidae). |
Cestoplana faraglionensis Lang, 1884 | 1884 or earlier | | | |
Discocelis tigrina (Blanchard, 1847) | 1884 or earlier | | | |
Thysanozoon brocchii (Risso, 1818) | 1933 or earlier | | | |