Micromelo undatus (Bruguière, 1792)

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 : 4

01. Micromelo undatus (Bruguière, 1792) ( Fig. 2A )

Material examined: Parrachos de Rio do Fogo, Rio do Fogo, 25. VI.2009, two specimens, 14-15 mm (body length), leg. M. Delgado ( GEEFAA 294 ). Praia de Santa Rita, Extremoz, 11.X.2008, one specimen, 14 mm (body length), leg. M. Delgado ( MZSP 97052 ), 09.VII.2009, one specimen, 13 mm (body length), leg. M. Delgado ( GEEFAA 361 a), 22.VIII.2009, one specimen, 18 mm (body length), leg. M. Delgado ( GEEFAA 339 ). Praia de Pirambúzios, Nísia Floresta, 11.VII.2009, one specimen, 30 mm (body length), leg. M. Delgado ( GEEFAA 275 ), 08.XII.2013, four specimens, 30-40 mm (body length), leg. M. Delgado ( GEEFAA 320 ), 18.I.2014, two specimens, 20-30 mm (body length), leg. M. Delgado ( GEEFAA 323 ). Praia de Tabatinga, Nísia Floresta , 01.IV.2014, one specimen, 20 mm (body length), leg. T. Accioly ( GEEFAA 327 ), five specimens, 02.V.2015, 10-24 mm (body length), leg. M. Delgado ( GEEFAA 1319 ) ; Praia de Pitangui, Extremoz , 27.XII.2019, one specimen, 22 mm (body length), phot. reg. M. Delgado .

Description: Body elongate, translucent grayish coloration, with large, white, opaque spots throughout the body. Edge of the mantle and lobes of the cephalic shield greenish, with whitish, yellowish and reddish tone at edges. Bilobed cephalic shield, with eyes mid-frontally. Shell present, whitish with reticulated reddish pattern. Posteriorly, mantle projection covering the shell. Flattened, oval foot with coloration similar to the body.

Geographic distribution: Atlantic Ocean: Ascension Island, Azores, Barbados, Bermuda, Bonaire, Canary Island, Cape Verde Island, Colombia, Costa Rica, Cuba, CuraÇao, Haiti, Honduras, Jamaica, Martinique, Panama, Puerto Rico, St. Lucia, St. Vincent and the Grenadines, USA, Venezuela, Virgin Islands, Brazil (Alagoas, Bahia, Ceará, Fernando de Noronha, Pernambuco and Rio Grande do Norte) ( Nordsieck, 1972; García et al., 2002; Moro et al., 2003; Valdés, 2005; Valdés et al., 2006; Rios, 2009; Martinez et al., 2012; Padula et al., 2012; GalvãoFilho et al., 2015; Padula et al., 2017; Feliciano et al., 2021).

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).