Phidiana lynceus Bergh, 1867

Delgado, Marlon, Freire, Fúlvio Aurélio de Morais, Meirelles, Carlos Augusto Oliveira de, Padula, Vinicius, Bahia, Juliana & Brandão, Simone Nunes, 2022, Sea slugs (Gastropoda: Heterobranchia) from Rio Grande do Norte, Northeastern Brazil, Papéis Avulsos de Zoologia 62, pp. 1-26 : 16-18

35. Phidiana lynceus Bergh, 1867 ( Fig. 4E )

Material examined: Praia de Santa Rita, Extremoz, 09.III.2009, two specimens, 19-27 mm (body length), leg. J. Bahia ( MZSP 97035 ; GEEFAA 299 ), 26.IV.2009, three specimens, 15-21 mm (body length), leg. M. Delgado ( GEEFAA 314 ), 24.VI.2009, four specimens, 5-14 mm (body length), phot. reg. M. Delgado, 05.I.2011, one specimen, 16 mm (body length), leg. M. Delgado ( GEEFAA 287 ). Praia de Cotovelo, Parnamirim, 29.VII.2009, one specimen, 14 mm (body length), leg. F. Santos ( GEEFAA 280 ), 01.II.2014, three specimens, 12-14 mm (body length), leg. M. Delgado ( GEEFAA 271 ). Praia de Pirambúzios, Nísia Floresta, 13.II.2010, one specimen, 18 mm (body length), leg. M. Delgado ( GEEFAA 274 ), 07.IV.2011, one specimen, 10 mm (body length), leg. M. Delgado ( GEEFAA 284 ), 01.XII.2013, one specimen, 18 mm (body length), leg. M. Delgado ( GEEFAA 306 ). Praia de Tabatinga, Nísia Floresta, 15.II.2014, one specimen, 12 mm (body length), leg. M. Delgado ( GEEFAA 291 ), 02.V.2015, one specimen, 12 mm (body length), phot. reg. M. Delgado. Praia de Baia Formosa, Baia Formosa, 05.VII.2009, one specimen, 3 mm (body length), leg. M. Delgado ( GEEFAA 303 ) ; Praia de Pitangui, Extremoz , 11.I.2019, one specimen, 8 mm (body length), leg. M. Delgado ( GEEFAA 1315 ) .

Description: Body elongated and cylindric, translucent whitish with three white lines, the first one dorsal, beginning in the tip of the tail and bifurcating close to the oral tentacles, ending in the anterior of each rhinophores. Other two lines lateral, beginning in the basis of the last ceratae and ending in basis of the fist ceratae. Redorange spot on first five rhinophore lamellae, on medial region of oral tentacles. Basis of caratae dark or light brown, cnidosacs whitish. Conspicuous, well-developed head with black eyes posterior to the basis of the rhinophores; one pair of elongated, smooth oral tentacles, wide in the basis and pointed distally, more than twice as long as the rhinophores. One pair of retractile, lamellate, conical rhinophores with robust, basal projection. Dorsal surface smooth with lateral, smooth and elongated ceratae organized in rows. Posteriorly, smooth, elongated foot forming a narrow tail.

Geographic distribution: Pacific Ocean: Galapagos, Panama ( Marcus & Marcus, 1967a; Gosliner, 1991); Eastern Atlantic: Canary Islands, Ghana, Savage Islands ( Edmunds, 1975; Cervera et al., 2004); Western Atlantic: Aruba, Bahamas, Barbados, Bonaire, Colombia, Costa Rica, CuraÇao, Guadeloupe, Jamaica, Martinique, Mexico, Panama, St. Lucia, St. Maarten / St. Martin, St Vicent & the Grenadines, USA, Venezuela, Virgin Islands, Brazil (Alagoas, Bahia, Ceará, Rio de Janeiro, Rio Grande do Norte – present study, São Paulo) ( Rios, 1994; Valdés et al., 2006; García et al., 2008; Rios, 2009; Padula et al., 2012; Galvão-Filho et al., 2015).

Figures

Figure 4. Heterobranch sea slugs from Rio Grande do Norte. (A) Doris kyolis (6 mm – GEEFAA 340); (B) Doris sp. (8 mm – GEEFAA 347); (C) Doto chica (5 mm – GEEFAA 315); (D) Doto divae (2 mm – GEEFAA 285); (E) Phidiana lynceus (27 mm – MZSP 97035);(F) Cratena minor (18 mm – GEEFAA 334); (G) Berghia creutzbergi (13 mm – GEEFAA 1306); (H) Berghia rissodominguezi (3 mm – GEEFAA 289); (I) Spurilla braziliana (13 mm – MZSP 97034); (J) Glaucus atlanticus (35 mm – phot. reg.);(K) Cuthonabarbadiana (5 mm – GEEFAA 257).