Oxynoe antillarum Mörch, 1863

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 : 7

07. Oxynoe antillarum Mörch, 1863 ( Fig. 2G )

Material examined: Praia de Santa Rita, Extremoz, 24. VI.2009, six specimens, 4-20 mm (body length), leg. F. Santos ( MZSP 97055) and leg. M. Delgado ( GEEFAA 276), 09.VII.2009, six specimens, 6-15 mm (body length), leg. M. Delgado ( GEEFAA 312), 22.VIII.2009, six specimens, 3-7 mm (body length), leg. M. Delgado ( GEEFAA 279). Praia de Cotovelo, Parnamirim, 29.IX.2009, five specimens, 4-6 mm (body length), leg. M. Delgado ( GEEFAA 281). Praia de Pirambúzios, Nísia Floresta, 12.III.2009, twenty specimens, 1-5 mm (body length), leg. V. Padula ( MZSP 97043), 21. VI.2009, five specimens, 2-5 mm (body length), phot. reg. M. Delgado, 21.VII.2009, seven specimens, 4-12 mm (body length), leg. M. Delgado ( GEEFAA 277), 13.II.2010, 1-10 mm (body length), leg. M. Delgado ( GEEFAA 278, 292), 28.II.2010, 1-11 mm (body length), leg. M. Delgado ( GEEFAA 307), 07.IV.2011, thirty-eight specimens, 2-10 mm (body length), leg. M. Delgado ( GEEFAA 296), 27.IV.2013, sixty-eight specimens, 1-13 mm (body length), phot. reg. M. Delgado. Praia de Baia Formosa, Baia Formosa, 04.I.2011, three specimens, 2-17 mm (body length), leg. F. Santos ( GEEFAA 331), 13. V.2014, two specimens, 15-25 mm (body length), leg. M. Delgado ( GEEFAA 352), 14. V.2014, three specimens, 4-7 mm (body length), leg. M. Delgado ( GEEFAA 353).

Description: Elongate and cylindrical body,external bubble-shaped shell, translucent, fragile and covered by the parapodia, which forms a long tail on the posterior. Head with cylindrical rhinophores projected to the front of animal, evident black eyes at base of the head. Predominant color of the body green with some light blue spots and white at mantle edge and rhinophores top. Live specimens measuring about 1-19 mm body length.

Geographic distribution: Western Atlantic: Aruba, Bahamas, Barbados, Belize, Bermuda, Bonaire, Cayman Islands, Costa Rica, Cuba, CuraÇao, Dominican Republic, Grenada, Guadeloupe, Honduras, Jamaica, Martinique, Mexico, Panama, Puerto Rico, St. Lucia, St. Thomas, St. Vicent & the Grenadines, Trinidad & Tobago, USA, Venezuela, Virgin Islands, Brazil (Alagoas, Bahia, Ceará, Pernambuco, Rio de Janeiro, Rio Grande do Norte – present study, São Paulo) ( Rios, 1994; Padula, 2008; Rios, 2009; Meirelles et al., 2010; Padula et al., 2012; GalvãoFilho et al., 2015).

Remarks: Oxynoe antillarum was often found associated to Caulerpa racemosa .

Figures

Figure 2. Heterobranch sea slugs from Rio Grande do Norte. (A) Micromelo undatus (15 mm – GEEFAA 294); (B) Haminoea antillarum (2 mm – GEEFAA 344); (C)Camachoaglaja berolina(7 mm– GEEFAA270);(D)Chelidonurahirundinina(16mm– GEEFAA1320);(E)Navanaxgemmatus (40mm– MZSP97068);(F)Ascobulla ulla (7 mm – MZSP 97049); (G) Oxynoe antillarum (25 mm – GEEFAA 352); (H) Elysia canguzua (15 mm – GEEFAA 295); (I) Elysia pawliki (25 mm – MZSP 97061); (J) Elysia subornata (14 mm – MZSP 97050); (K) Thuridilla malaquita (15 mm – phot. reg.); (L) Caliphylla mediterranea (9 mm – GEEFAA 349); (M) Aplysia cervina (70mm – MZSP 97074); (N) Aplysia dactylomela (76 mm – MZSP 97073);(O) Bursatellaleachii (75 mm – GEEFAA 324).