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Paraonis tenera was described by Grube (1873) with base on a single specimen. The description was very short and inaccurate, and without any illustration. As noted by Strelzov (1973), "the small, flat elongated caruncle, reaching up to the second segment" described by Grube (1873) refers probably to a prostomial antennae, instead to an artifact due to the compression of the specimen, as suggested by Cerruti (1909) (see Strelzov, 1973, fig. 19, for a reconstruction based on the original description). Other features referred in the original description, as the branchiae starting at the fourth chaetiger, identifies the specimen as an indeterminable Aricidea specimen, a genus created by Webster in 1879. The species was only referred again in Fauvel (1927), based largelly in the description by Grube, and is cited in a list of Mediterranean Paraonidae by Rullier (1963). Strelzov (1973) noted that Paraonis Grube, 1873, would be an older synonym of Aricidea Webster, 1879. However, Grube’s species was never found again, no type material is known to exist, and the original description is too brief in order to allow an identification. Moreover, the name Paraonis has been used in a different sense, since 1873. For these reasons, Strelzov (1973) considered Paraonis tenera Grube, 1873 as a nomen oblitum, stating that the genus Paraonis should be retained as Paraonis Cerruti, 1909 (not Grube, 1873). [note by João Gil; 12.5.2013].

Cerruti, Attilio. (1909). Contributo all'anatomia, biologia e sistematica delle Paraonidae (Levinsenidae) con particolare riguardo alle specie del golfo di Napoli. Mittheilungen aus der Zoologischen Station zu Neapel. 19(3): 459-512, plates 18-19. available online at http://www.biodiversitylibrary.org/item/182419#page/483/mode/1up

Fauvel, P. (1927). Polychètes sédentaires. Addenda aux errantes, Arachiannélides, Myzostomaires. Faune de France Volume 16. Paul Lechevalier. Paris. 1-494. available online at http://www.faunedefrance.org/bibliotheque/docs/P.FAUVEL(FdeFr16)Polychetes-sendentaires.pdf

Grube, Adolf-Eduard. (1873). Über ein paar neue Anneliden aus der Familie der Spiodeen. Jahres-Bericht der Schlesichen Gesellschaft für vaterländische Cultur. 50: 57-58. available online at http://www.biodiversitylibrary.org/item/118505#page/75/mode/1up

Strelzov, V.E. (1973). МНОГОЩЕТИНКОВЫЕ ЧЕРВИ семейства Paraonidae Cerruti, 1909 [Polychaete worms of the family Paraonidae Cerruti, 1909 (Polychaeta, Sedentaria)]. Akademia Nauk. Moscow. 1-170. available online at http://herba.msu.ru/shipunov/school/books/streltsov1973_paraonidae.pdf

Rullier, F. (1963). Les annélides polychètes du Bosphore, de la Mer de Marmara et de la Mer Noire, en relation avec celles de la Méditerranée. Rapports et Procès-verbaux des réunions de la Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée. 17(2): 161-260.