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Flabellina Dana Millen and Hamann, 2006 ISSN 1809-127X (online edition) © 2011 Check List and Authors Chec List Open Access | Freely available at www.checklist.org.br Journal of species lists and distribution N Flabellina dana Millen and Hamann, 2006 ISTRIBUTIO First record of 1* 2 1 3 D , Vinicius Queiroz and (Mollusca: 1 Nudibranchia) in the South Atlantic Ocean 4 RAPHIC Licia Sales , Marlon Delgado , Vinicius Padula , Cláudio L. S. Sampaio G Rodrigo Johnsson EO G N 1 Universidade Federal da Bahia, Instituto de Biologia, Departamento de Zoologia. Avenida Adhemar de Barros s/nº, Campus Ondina. CEP 40170- O 290. Salvador, BA, Brazil. 2 Universidade Federal do Rio Grande do Norte, Centro de Biociências, Departamento de Botânica, Ecologia e Zoologia, Laboratório de OTES Invertebrados Bentônicos, Avenida Senador Salgado Filho, CEP 59072-970. Natal, RN, Brazil. N 3 Zoologische Staatssammlung München,[email protected] Mollusca Sektion. Münchhausenstr. 21, 81247, München, Germany. 4 Universidade Federal de Alagoas, Unidade de Ensino Penedo, Avenida Beira Rio, s/n°, Centro Histórico. CEP 57200-000. Penedo, AL, Brazil. * Corresponding author: E-mail: Abstract: The nudibranch Flabellina dana Millen and Hamann, 2006 is reported from two localities in the northeastern Caribbean Sea, in South Atlantic Ocean, extending its known geographic distribution more than 3500 km southward. Brazilian coast. These are the first records of this species, previously recorded from localities in the Bahamas and the Nudibranchia comprehends around 3000 marine coast, South Atlantic Ocean. This species was previously ingastropod adult forms, species are hermaphroditehighly diverse and in most morphological, species are recorded in the Caribbean Sea, more exactly in St. Lucia ecological and biological aspects. Nudibranchs lack the shell Hamann(type locality), 2006; Curaçao,Valdés et Costaal. Rica and also in the island of Abaco,The collected Bahamas and (Figure examined 1) (Redfern, material 2001; is deposited Millen and in carnivorous, feeding on other marine invertebrates, mainly 2006). sponges. It is the richest group within Opisthobranchia, withSo approximately far, around 100 half nudibranch of the total species number were of reported species the malacological collection of the Museu de Zoologia (Behrens 2005; Wagëleet al and Klussman-Kolb 2005). of the Universidade de São Paulo (MZSP). Specimens were collected through snorkeling in Santa Rita beach, species,to Brazil Valdés(DaCosta et al. 2010), a small number if compared Extremoz, Rio Grande do Norte state (RN) (05°41’41” S, carriedto more outstudied during places three and decades, even the ranging Caribbean from Sea 1955 (191 to 35°11’58” W) on August 2009 (MZSP 99636) (Figure 2B) 2006). In Brazil, most studies were and in Barra beach, Salvador, Bahia state (BA) (13°00’37” photographedS, 38°31’49” W) in onsitu January 2010 (MZSP 96480) (Figure 1983 by the German couple Ernst and Eveline Marcus 2A and 2C ). The specimen from Bahia (MZSP 96480) was (Marcus 1955; Marcuset al 1970; Marcus 1983). Recently, Order Nudibranchia (Figure Blainville, 2A). 1814 new specieset al were discovered and described from Family Flabellinidae Bergh, 1889 underestimated.Brazil (DaCosta . 2010; Padula and Delgado 2010; Flabellina dana Millen and Hamann, 2006 AlvimAmong . 2011)nudibranchs, indicating Flabellina that the diversity is clearly Description: rachidian teeth; strong jaws; presenceVoigt, of corners 1834 onis characterized by a triseriate radula with denticulate long and extremely slender body, specimens length 6,0 mm (MZSP 99636) and 7,0 mm the foot (propodial tentacles); grouped cerata and (MZSP 96480). Bilabiate foot with long propodial pleuroproctic anus (Millen and Hermosillo 2007). The tentacles and tapered posterior end. Oval head as wide fourgenus species has over are 54 known: species Flabellina distributed dushia in temperate (Marcus and as foot. Mouth with vertical aperture. Oral tentacles tropical seas (Millen and Hamann 2006). In Brazil, only withsmooth, pointed length tip, corresponding each rhinophore to approximatelywith up to eight 1/5 wide of et al Flabellina engeli Marcus the total body length. Annulate and wide rhinophores Marcus, 1963) from the region of Búzios, Rio de Janeiro state (García García . 2008); and spaced rings. Eyes situated laterally on the head just and Marcus, 1968et knownal. fromFlabellina Cabo Frio vertaand Arraial (Marcus, do below the basis of each rhinophore. Cerata latero-dorsally Cabo, Rio de Janeiro state to Arvoredo, Santa Catarina et positioned, arranged in five to six paired groups along al.state (DaCosta 2007);Flabellina marcusorum the body length. Pair of pre-cardiac groups with five to 1970) from Cananéia, São Paulo state (García García six ceratas, post-cardiac groups decreasing in number of 2008; Rios 2009)et al. and Gosliner cerata towards distal end. Translucid white body with a and Kuzirian, 1990 from Santos Bay, São Paulo state longitudinal dorsal white line. Body sides opaque white. Flabellina(García García dana Millen 2008; and Rios Hamann, 2009). 2006 in the Brazilian CerataThe redspecimens with white found cnidosacs. in Brazil areRhinophores consistent withopaque the This work reports for the first time the occurrence of white except for their translucid basis (Figure 2). Check List | Volume 7 | Issue 6 | 2011 880 Sales et al. | First record of Flabellina dana in the South Atlantic Ocean original description of F. dana Species distribution ranging from the Caribbean Sea Flabellina sp. A; Valdés et al. 2006, as Flabellina (Millen and Hamann 2006) et al. 2006; fromand additional the Bahamas works and (Redfern, the Caribbean 2001, Sea. as As the species is as far aset althe Brazilian coastet al is not novelty among marine sp. 3), based on material etorganisms, al. with exampleset al. in cnidarianset al. (Neves et characteristics such as the annulate rhinophores, the small al.Neves . 2008;et Neves al . 2010) and reef fishes (Floeter easily recognized by its external morphology, with specific 2001; Joyeux 2001; Rocha 2005; Floeter 2008; Olavo . 2011). Concerning nudibranchs, the Ourspecimens records herein from studied Brazil extendwere not the dissected known togeographic preserve similarity between the Brazilian and CaribbeanFlabellina fauna dana has is distributionits morphology of the and species were deposited more than intact 3500 in km the southward, collection. onebeen more reported species since in common 1970’s (Marcusbetween 1970;these twoMarcus regions, and in the South Atlantic Ocean. beingMarcus the 1970; present Padula records and Santosimportant 2006). additions to the little resembles F. dana is F. dushia. Some common characteristics Among the Flabellinidae the species that most knownA nudibranch biodiversity in northeastern Brazil. and most of the dorsum; the foot bilabiate and notched withare the long opaque propodial white tentacles; color on the head,pleuroproctic oral tentacles anus, posterior to inter-hepatic space; and the renal and genital head,opening mouth location. and rhinophores.However, the Flabellinatwo species dushia can bepresents easily roundedmorphologically head, terminal differentiated and triangular due to characteristics mouth and smooth in the rhinophores, while F. dana and Hamann 2006; Valdés et hasal oval head, The rhinophore vertical and is ansub-terminal important diagnosticmouth and characteristic annulate rhinophores of F. dana (Millen . 2006). It is the B C only known western Atlantic Flabellinidae with annulate rhinophores (Figure 2C) (Millen and Hamann, 2006). Figure 2. Flabellina dana Bahia, northeastern Brazil. A. Specimen in situ , specimens from Rio Grande do Norte and from Salvador, Bahia State (7 mm long); B. Specimen from Extremoz, Rio Grande do Norte State (6 mm long); C. Detail of the annulate rhinophores of the specimen from Salvador. Acknowledgments: The authors thank Cristiane Xerez Barroso (UFC) and one anonymous referee for valuable comments on the manuscript. We also thank Sandra Millen (University of British Columbia) for her incentive and opinion on the identity of the studied material, and Luiz Simone (Museu de Zoologia of the Universidade de São Paulo) for providing registration numbers for specimens. V.P. is a scholarship holder from the Council for Scientific and Technological Development (CNPq- Brasil) and the German Academic Exchange Service (DAAD-Germany). R.J. would like to thank CNPq and FAPESB for the financial support. Literature Cited Onchidoris Alvim,South J., V. Atlantic Padula Ocean,and A.D. with Pimenta. the description 2011. First of recorda new speciesof the genus from Brazil. Journal (Gastropoda: of the Marine Nudibranchia: Biological OnchidorididaeAssociation of thefrom United the Kingdom Nudibranch Behaviour. 91(2): 505-511. Behrens D.W. 2005. Jacksonville: New World Publications, Inc. 176 p. DaCosta, S., C.M. Cunha, L.R.L. Simone and M. FlabellinaSchrödl. engeli2007. lucianaeComputerbased 3-dimensional reconstruction of majorJournal organ of Figure 1. Flabellina dana Molluscansystems of Studies a new aeolid nudibranch subspecies, , from Brazil (Gastropoda,2010. Opisthobranchia). A new species of Hypselodoris Geographicet al. distribution of . Previous records and a redescription 73: of339-353. Hypselodoris picta lajensis and(circles): 6. Bahia, 1. Bahamas; Brazilian 2. northeastern St. Lucia (type coast. locality); 3. Curaçao and 4. Costa DaCosta, S., V. Padula and M. Schrödl.The Veliger Rica (Valdés 2006). New records (squares): 5. Rio Grande do Norte (Nudibranchia: Chromodorididae) from Brazil. 51(1):
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