New data on opisthobranchs (Mollusca: Gastropoda) from the southwestern coast of Portugal

199 Bol. Inst. Esp. Oceanogr. 19 (1-4). 2003: 199-204 BOLETÍN. INSTITUTO ESPAÑOL DE OCEANOGRAFÍA ISSN: 0074-0195 © Instituto Español de Oceanografía, 2003 New data on opisthobranchs (Mollusca: Gastropoda) from the southwestern coast of Portugal G. Calado1,2, M. A. E. Malaquias1,7, C. Gavaia1,3 *, J. L. Cervera4, C. Megina4, B. Dayrat5, Y. Camacho5,8, M. Pola4and C. Grande6 1Instituto Português de Malacologia, Zoomarine, E. N. 125, km 65 Guia, P-8200-864 Albufeira, Portugal. E-mail: [email protected] 2Centro de Modelação Ecológica Imar, FCT/UNL, Quinta da Torre, P-2825-114 Monte da Caparica, Portugal 3Centro de Ciências do Mar, Faculdade de Ciências do Mar e do Ambiente, Universidade do Algarve, Campus de Gambelas, P-8000-010 Faro, Portugal 4Departamento de Biología. Facultad de Ciencias del Mar y Ambientales. Universidad de Cádiz. Apartado 40. E-11510 Puerto Real (Cadiz), Spain 5Invertebrate Zoology and Geology Departament, California Academy of Sciences, Golden Gate Park, 94116 San Francisco, USA 6Museo Nacional de Ciencias Naturales. José Gutiérrez Abascal, 6. E-28006 Madrid, Spain 7Mollusca Research Group, Department of Zoology, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK 8Instituto Nacional de Biodiversidad (INBio). Apartado 22-3100, Santo Domingo de Heredia, Costa Rica * César Gavaia died on 3rd July 2003, in a car accident Received January 2003. Accepted December 2003. ABSTRACT The present papers reports the results obtained from different field samplings carried out on the southwestern Portuguese coast during July 2002, within the scope of three research projects on opisthobranch molluscs. Two areas were sampled, one around Sagres (37° 00’ N, 8° 57’ W) on the SW tip of the Portuguese mainland, the other near Sines (37° 57’ N, 8° 53’ W), 110 km north of the other site. Eighty-one species of opisthobranchs were identified, six of them new to the Portuguese fauna. Keywords: Mollusca, Opisthobranchia, Portugal. RESUMEN Nuevos datos sobre opistobranquios (Mollusca: Gastropoda) en la costa suroeste de Portugal Se exponen los resultados obtenidos a partir de los diferentes muestreos realizados en julio de 2002 en el suroeste de la costa portuguesa, en el ámbito de tres proyectos centrados en los moluscos opistobranquios. Se muestrearon dos áreas: una en los alrededores de Sagres (37° 00’ N, 8° 57’ O), en el extremo suroeste continental de Portugal y la otra en los alrededores de Sines (37° 57’ N, 8° 53’ O), a 110 km al norte de la primera. Se identificaron 81 especies de opistobranquios, seis de las cuales constituyen nuevas citas para la fauna portuguesa. Palabras clave: Moluscos, opistobranquios, Portugal. INTRODUCTION Recent advances in the study of Portuguese opisthobranch fauna have added many names to the country’s species roster. The international marine biology expedition Algarve 88, by the Muséum National d’Histoire Naturelle of Paris, and the publication of its results (García-Gómez et al., 1991), can be considered the most important turning point. During that expedition, samples were collected from two areas on the southern Portuguese coast (Sagres and Olhão), and 53 species were reported for the first time for the Portuguese fauna. More recently, further relevant data were reported from the southern coast by Malaquias and Morenito (2000), and from the western coast by Calado and Urgorri (1999), Calado et al. (1999) and Gavaia et al. (2003). Due to the excellent results obtained at Sagres in 1988, and in order to contribute to updating the Iberian opisthobranch catalogue, a new campaign was carried out in July 2002. In addition to sampling around Sagres, it was decided to investigate the nearby western coast (along the area around Sines), since not much data was then available, and also because it represents a mid point between Sagres and Arrábida –the latter zone having already been well explored (Calado et al., 1999; Gavaia et al. , 2003). The checklist of species found is presented herein with comments on the relevant species. MATERIALS AND METHODS Study area The campaign was divided into two sampling areas, one at Sagres (37° 00’ N, 8° 57’ W), on the southwest tip of the Portuguese mainland, with 8 sampling stations, the other around Sines (37° 57’ N, 8° 53’ W), 110 km north of the other site, with 5 sampling stations (figure 1). Collection of the material Specimens were collected from the rocky intertidal zone down to 22 m, using scuba gear whenever necessary. Only one specimen came from 400 m, trawled by a commercial vessel. Both direct and indirect methods were used, including observation in specific substrata (over sessile organisms, under boulG. Calado et al. Portuguese opisthobranchs Bol. Inst. Esp. Oceanogr. 19 (1-4). 2003: 199-204 200 Figure 1. Map of the study area. (A): sampling stations around Sines: (1): Pedras Amarelas (North); (2): São Torpes; (3): Porto Covo; (4): Ilha do Pessegueiro; (5): Praia do Malhão. (B): sampling stations around Sagres: (1): Praia da Bordeira; (2): Ponta de Sagres (Fortaleza); (3): Gruta do Salva-vidas; (4): Ponta da Baleeira; (5): Praia da Baleeira; (6): Ilhéus do Martinhal; (7): Ponta dos Caminhos; (8): Praia da Ingrina ders), brushing substrata into mesh bags, and an airsuction device. The latter two methods required subsequent laboratory screening. All collected animals were photographed and/or filmed in vivo. Those specimens selected for anatomical studies were then anaesthetised with menthol or magnesium chlorine and preserved in Bouin’s fluid. Specimens for molecular analysis were directly preserved in absolute ethanol. The material collected was deposited in the collections of the Museo Nacional de Ciencias Naturales of Madrid (Spain) and the California Academy of Sciences (San Francisco, USA). RESULTS Of the 85 species collected during the campaign, 81 were identified to species level; these are listed below. The classification presented herein is based on the most recent and comprehensive phylogenetic classifications of different higher taxa of opisthobranchs (Jensen, 1996, 1998; Wägele and Willan, 2000; Schrödl, Wägele and Willan 2001; Valdés and Gosliner, 2001; Valdés, 2002). Likewise, following the latest phylogenetic classification criteria, no taxa are ranked higher than the family level (De Queiroz and Gauthier, 1994). Therefore, the resultant classification is hierarchical. Data on sampling area –(Sa): Sagres; (Si): Sines–, number of specimens (withfor more than ten) and collecting depths are listed after the species name. ■CEPHALASPIDEA s.s. Mikkelsen, 1996 RETUSOIDEA Thiele, 1926 Family Retusidae Thiele, 1926 Genus Retusa Brown, 1827 Retusa truncatula (Bruguière, 1792): Sa, 3 specimens, –10/ –22 m. RUNCINOIDEA Odhner 1958 Family Runcinidae H. and A. Adams, 1854 Genus Runcina Forbes and Hanley, 1853 Runcina coronata (Quatrefages, 1844): Sa, specimens, 0/–10 m; Si, + specimens, 0/ –10 m. Runcina ferruginea Kress, 1977: Sa, 6 specimens, –17/ –20 m. ■ANASPlDEA Fischer, 1883 Family Aplysiidae Lamarck, 1809 Genus Aplysia Linné, 1767 Aplysia depilans Gmelin, 1791: Sa, 2 specimens, –8/ –12 m. Aplysia fasciata Poiret, 1789: Sa, + specimens, 0/ –10 m; Si, 1 specimen, intertidal. Aplysia punctata Cuvier, 1803: Si, + specimens, –6/ –20 m. Aplysia parvula Guilding in Mörch, 1863: Sa, 8 specimens, 6/ –22 m; Si, 1 specimen, 10 specimens, –7/ –17 m. ■SACOGLOSSA Ihering, 1876 PLAKOBRANCHOIDEA Rang, 1829 Family Plakobranchidae Rang, 1829 Genus Elysia Risso, 1818 Elysia viridis (Montagu, 1804): Sa, + specimens, 0/ –22 m; Si, + specimens, 0/ –15 m. LIMAPONTIOIDEA Gray, 1847 Family Hermaeidae H. and A. Adams, 1854 Genus Hermaea Lovén, 1844 Hermaea bifida (Montagu, 1815): Sa, 2 specimens, –10/ –22 m. Hermaea paucicirra Pruvot-Fol, 1953: Sa, 1 specimen, intertidal. Genus Hermaeiopsis A. Costa, 1869 Hermaeopsis variopicta (A. Costa, 1869): Si, 1 specimen, –17 m. Family Limapontiidae Gray, 1847 Genus Placida Trinchese, 1876 Placida tardyi (Trinchese, 1873): Sa, 1 specimen, –10/ –22 m. Placida verticilata Ortea, 1981: Sa, + specimens, 0/ –22 m. ■NUDIPLEURA Wägele and Willan, 2000 PLEUROBRANCHOIDEA Férussac, 1822 Family Pleurobranchidae Férussac, 1822 Genus Berthella Blainville, 1824 Berthella plumula (Montagu, 1803): Sa, 2 specimens, intertidal. Berthella stellata (Risso, 1826): Sa, + specimens, 0/ –14 m; Si, 5 specimens, 0/ –7 m. Genus Berthellina Gardiner, 1936 Bertellina edwardsi (Vayssière, 1897): Sa, 1 specimen, –15 m. NUDIBRANCHIA Blainville, 1814 ANTHOBRANCHIA Minichev, 1970 DORIDOIDEA Pelseneer, 1894 PHANEROBRANCHIA Fischer, 1883 Family Goniodorididae H. and A. Adams, 1854 Genus Goniodoris Forbes and Goodsir, 1839 Goniodoris castanea Alder and Hancock, 1845: Sa, 1 specimen, –8 m; Si, 1 specimen, intertidal. Genus Okenia Menke, 1830 Okenia mediterranea (Ihering, 1886): Si, 1 specimen, –17 m. Genus Trapania Pruvot-Fol, 1931 Trapania tartanella (Ihering, 1885): Sa, 6 specimens, –6/ –17 m; Si, + specimens, –7/ –15 m. G. Calado et al. Portuguese opisthobranchs Bol. Inst. Esp. Oceanogr. 19 (1-4). 2003: 199-204 201 Family Onchidorididae Alder and Hancock, 1845 Genus Diaphorodoris Iredale and O’Donoghue, 1923 Diaphorodoris luteocincta (Sars, 1870): Sa, 5 specimens, –7/ –15 m; Si, 2 specimens, –15 m. Diaphorodoris papillata Portmann and Sandmeier, 1960: Sa, 5 specimens, –7/ –22 m; Si, 1 specimen, –15 m. Family Polyceridae Alder and Hancock, 1845 Genus Crimora Alder and Hancock, 1862 Crimora papillata Alder and Hancock, 1862: Sa, + specimens, –7/ –22 m; Si, 3 specimens, –17 m. Genus Roboastra Bergh, 1877 Roboastra europaea García-Gómez, 1985: Sa, 1 specimen, –20 m. Genus Limacia O.F. Müller, 1781 Limacia clavigera (O.F. Müller, 1776): Sa, 6 specimens, –10/ –22 m. Genus Polycera Cuvier, 1817 Polycera quadrilineata (O.F. Müller, 1776): Sa, + specimens, –6/ –22 m; Si, + specimens, –7/ –15 m. Polycera faeroensis Lemche, 1929: Sa, 3 specimens, –7/ –17 m; Si, + specimens, –15/ –17 m. Family Aegiridae Fischer, 1883 Genus Aegires Lovén, 1844 Aegires punctilucens (D’Orbigny, 1837): Si, 1 specimen, intertidal. CRYPTOBRANCHIA Odhner, 1934 LABIOSTOMATA Valdés, 2002 Family Chromodorididae Bergh, 1891 Genus Hypselodoris Stimpson, 1855 Hypselodoris villafranca (Risso, 1818): Sa, + specimens, 0/ –22 m; Si, + specimens, –15/ –17 m. Hypselodoris fontandraui (Pruvot-Fol, 1951): Sa, 4 specimens, –7/ –17 m; Si, 3 specimens, –15/ –17 m. Hypselodoris bilineata (Pruvot-Fol, 1953): Sa, 5 specimens, –6/ –20 m; Si, 3 specimens, –7/ –17 m. Hypselodoris cantabrica Bouchet and Ortea, 1980: Si, + specimens, –15/ –17 m. Hypselodoris midatlantica Gosliner, 1990: Sa, + specimens, –10/ –20 m; Si, + specimens, –15/ –17 m. Genus Chromodoris Alder and Hancock, 1855 Chromodoris luteorosea (Rapp, 1827): Si, 2 specimens, –15 m. Chromodoris purpurea (Laurillard, 1831): Sa, 6 specimens, 0/ –15 m; Si, 9 specimens, –7/ –17 m. Chromodoris krohni (Vérany, 1846): Sa, 9 specimens, –7/ –20 m. Genus Cadlina Bergh, 1878 Cadlina pellucida (Risso, 1826): Sa, 2 specimens, –15/ –17 m; Si, 3 specimens, –15/ –17 m. Family Dorididae Rafinesque, 1815 Genus Doris Linné, 1758 Doris pseudoargus Rapp, 1827: Si, 2 specimens, –14/ –15 m. Doris cf. sticta (Iredale and O’Donoghue, 1923): Sa, 1 specimens, –15 m. Genus Aldisa Bergh, 1878 Aldisa smaragdina Ortea, Pérez and Llera,1982: Sa, 4 specimens, –14/ –17 m. Family Discodorididae Bergh, 1891 Genus Jorunna Bergh, 1876 Jorunna tomentosa (Cuvier, 1804): Si, 5 specimens, 0/ –15 m. Genus Discodoris Bergh, 1877 Discodoris rosi Ortea, 1979: Sa, 1 specimen, –10 m; Si, 6 specimens; –7/ –17 m. Genus Rostanga Bergh, 1879 Rostanga rubra Risso, 1818: Sa, 1 specimen; –12 m. POROSTOMATA Bergh, 1892 Family Dendrodorididae O’Donoghue, 1924 Genus Dendrodoris Ehrenberg, 1831 Dendrodoris limbata (Cuvier, 1804): Sa, 3 specimens, intertidal. Dendrodoris herythra Valdés and Ortea in Valdés, Ortea, Avila and Ballesteros, 1996: Sa, 5 specimens, 0/ –20 m. Genus Doriopsilla Bergh, 1880 Doriopsilla areolata Bergh, 1880: Sa, + specimens, –6/ –20 m; Si, 8 specimens, –17 m. Doriopsilla pelseneeri Oliveira, 1895: Sa, 2 specimens, –10/ –14 m. DEXIARCHIA Schrödl, Wägele and Willan, 2001 CLADOBRANCHIA Willan and Morton, 1984 DENDRONOTOIDEA Sars, 1878 Family Tritoniidae Lamarck, 1809 Genus Tritonia Cuvier, 1803 Tritonia manicata Deshayes, 1853: Si, 2 specimens, –15/ –17 m. Tritonia nilsodhneri Marcus, 1983: Sa, + specimens, –7/ –18 m; Si, 2 specimens, –14 m. Genus Marionia Vayssière, 1877 Marionia blainvillea (Risso, 1818): Sa, 1 specimen, from a trawling (–400 m). Family Hancockiidae MacFarland, 1923 Genus Hancockia Gosse, 1877 Hanockia uncinata (Hesse, 1872): Si, 5 specimens, –7/ –14 m. Family Dotoidae Gray, 1853 Genus Doto Oken, 1815 Doto pinnatifjda (Montagu, 1804): Sa, 3 specimens, –7/ –15 m. Doto rosea Trinchese, 1881: Sa, 1 specimen, –10 m. Doto dunnei Lemche, 1976: Si, + specimens, –7/ –15 m. Doto koenneckery Lemche, 1976: Sa, 5 specimens, –7/ –18 m. Doto eireana Lemche, 1976: Sa, 1 specimen, –20 m. G. Calado et al. Portuguese opisthobranchs Bol. Inst. Esp. Oceanogr. 19 (1-4). 2003: 199-204 202 Doto verdicioi Ortea and Urgorri, 1978: Sa, 1 specimen, –10 m; Si, 6 specimens, –17 m. ARMINOIDEA Odhner, 1934 Family Proctonotidae Gray, 1853 Genus Janolus Bergh, 1884 Janolus cristatus (Delle Chiaje, 1841): Sa, 3 specimens, –10/ –22 m; Si, 9 specimens, –7/ –17 m. AEOLIDOIDEA Odhner, 1934 Family Flabellinidae Bergh, 1889 Genus Flabellina Voigt, 1834 Flabellina pedata (Montagu, 1815): Sa, + specimens, 6/ –22 m; Si, + specimens, –7/ –17 m. Flabellina babai Schmekel, 1972: Sa, 6 specimens, –7/ –22 m; Si, + specimens, –7/ –17 m. Flabellina ischitana Hirano and Thompson, 1990: Sa, 9 specimens, –10/ –22 m; Si, + specimens, 0/ –17 m. Family Piseinotecidae Edmunds, 1970 Genus Piseinotecus Marcus, 1955 Piseinotecus gaditanus Cervera, García-Gómez and García, 1986: Si, 1 specimen, –7 m. Family Facelinidae Bergh, 1889 Genus Favorinus Gray, 1850 Favorinus branchialis (Rathke, 1806): Sa, 1 specimen, –14 m; Si, 1 specimen, –15 m. Genus Facelina Alder and Hancock, 1855 Facelina annulicornis (Chamisso and Eisenhart, 1821): Sa, 3 specimens, –6/ –15 m; Si, 3 specimens, –15 m. Facelina coronata (Forbes and Goodsir, 1839): Sa, + specimens, –6/ –22 m; Si, 7 specimens, 0/ –15 m. Genus Cratena Bergh, 1864 Cratena peregrina (Gmelin, 1791): Sa, 3 specimens, –6/ –14 m; Si, 1 specimen, –15 m. Genus Caloria Trinchese, 1888 Caloria elegans (Alder and Hancock, 1845): Sa, 1 specimen, –14 m. Genus Dondice Marcus, 1958 Dondice banyulensis Portman and Sandmeier, 1960: Sa, + specimens, –10/ –22 m; Si, 7 specimens, 0/ –14 m. Genus Pruvotfolia Tardy, 1969 Pruvotfolia pselliotes (Labbé, 1923): Sa, 1 specimen, –6 m; Si, 1 specimen, intertidal. Family Aeolidiidae D’Orbigny, 1834 Genus Spurilla Bergh, 1864 Spurilla neapolitana (Delle Chiaje, 1823): Sa, 2 specimens, 0/ –16 m. Genus Aeolidiella Bergh, 1867 Aeolidiella soemeringi (Leuckart, 1828): Sa, 1 specimen, intertidal. Aeolidiella glauca (Alder and Hancock, 1845): Si, 1 specimen, –14 m. Aeolidiella sanguinea (Normann, 1877): Sa, 3 specimens, –6/ –18 m. Family Eubranchidae Odhner, 1934 Genus Eubranchus Forbes, 1838 Eubranchus farrani (Alder and Hancock, 1844): Sa, 6 specimens, –7/ –17 m; Si, 2 specimens, –17 m. Family Calmidae Iredale and O’Donoghue, 1923 Genus Calma Alder and Hancock, 1855 Calma glaucoides (Alder and Hancock, 1854): Sa, 1 specimen, intertidal; Si, 3 specimens, –17 m. Family Tergipedidae Thiele, 1931 Genus Cuthona Alder and Hancock, 1855 Cuthona caerulea (Montagu, 1804): Sa, 1 specimen, –14 m. Cuthona foliata (Forbes and Goodsir, 1838): Sa, 1 specimen, –10 m. Cuthona amoena (Alder and Hancock, 1845): Sa, 1 specimen, –17 m: Si, 1 specimen, –17 m. Cuthona genovae (O’Donoghue, 1929): Sa, 1 specimen, –15 m. Cuthona ocellata (Schmekel, 1966): Sa, + specimens, –6/ –14 m; Si, 8 specimens, –15/ –17 m. Cuthona thompsoni García, López-González and GarcíaGómez, 1991: Si, 3 specimens, –7 m. Family Embletoniidae Schmekel, 1970 Genus Embletonia Alder and Hancock, 1851 Embletonia pulchra Alder and Hancock, 1851: Si, 1 specimen, intertidal. DISCUSSION Six of the 81 identified species are new records for the Portuguese fauna, namely, Placida tardyi, Placida verticilata, Okenia mediterranea, Hypselodoris fontandraui, Cuthona amoena, and Cuthona thompsoni. P. tardyi was found for the first time in waters with a strong Atlantic influence, since previous Iberian records were confined to the western Andalusian coasts (Cervera et al., 1988; Cervera, García-Gómez and Ortea, 1991). C. thompsoni was collected for the second time outside its type locality, which is El Portil, Huelva (western Andalusia) (García, López-González and García-Gómez, 1991); there is also a photographic reference of this species for the Costa Blanca, on the Iberian Mediterranean coast (Wirtz and Debelius, 2003). The collection of Piseinotecus gaditanus at Sines was the fourth since its original description, and the G. Calado et al. Portuguese opisthobranchs Bol. Inst. Esp. Oceanogr. 19 (1-4). 2003: 199-204 203 northernmost on the Atlantic coast, although some photographic references are available for the French Atlantic Coast (Barrabes, 2003). Ortea et al. (1993) recorded this species at the Cape Verde Archipelago. Our data, together with other published results from the Portuguese coast –from Ria Formosa (García-Gómez et al., 1991, data from 1988; Malaquias and Morenito, 2000, data from 1996 to 1998), Sagres (García-Gómez et al., 1991, data from 1988); and Arrábida (Calado et al., 1999, data from 1994 to 1998)– were submitted to a cluster analysis. These data are not presented, since our results revealed no relevant differences among localities attributable to any kind of geographical variation. The distance between Arrábida and Ria Formosa (about 250 km along the coastline) was not enough for consistent differences to be found. The initial hypothesis was that Cape of São Vicente (close to Sagres), the southwestern tip of Europe, would constitute a marked geographical barrier, since the coastline here has a major discontinuity (figure 1). It is thus acceptable for the entire southern Portuguese coast to be considered the same biogeographical area. Any division for inventory purposes will, therefore, remain artificial. ACKNOWLEDGEMENTS The campaign was carried out under the scope of the projects REN2001-1956-C17-02/GLO (Spanish Ministry of Science and Technology), REN2000-0890/GLO (Spanish Ministry of Science and Technology), and PEET Grant DEB-9978155 (National Science Foundation, USA). The first author holds a grant from the Fundação para a Ciência e Teconologia, Portugal (BPD7133/2001). The authors would like to thank Docapesca de Sagres, Ciemar, Universidade de Évora, and Zoomarine for lending logistic support. REFERENCES Barrabes, M. 2003. Piseinotecus gaditanus Cervera, García & García, 1986. http://michel.barrabes.free.fr/pages_util/ espece.php?id=21. [January 2003.] Calado, G. and V. Urgorri. 1999. Additions and new data on Portuguese Opisthobranchs. Boll. Malacol. 35 (5-8): 97-102. Calado, G., V. Urgorri, R. Gaspar and F. J. Cristobo. 1999. 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