Crepidula cachimilla (Mollusca: Gastropoda), a new species from Patagonia, Argentina

A new species, Crepidula cachimilla, is described based on a population from 15 m depth in San Antonio Oeste, Argentina. Shell length ranged from 5.4 to 28.5 mm for males and from 9.6 to 52.2 mm for females. The minimum shell length recorded for a brooding female was 23.5 mm, and the maximum shell length was 49.3 mm. A detailed anatomical description is given, showing as main characters of the species a relative thick columellar muscle, a greater closure of the palliai cavity aperture by a fusion of the mantle border, a very small osphradium, with about 16 broad filaments, endostyle divided by a middle longitudinal furrow, very large salivary glands, duplication of both gastric ducts to the digestive gland, male seminal vesicle very long and with irregular walls, pallial oviduct with a broad vaginal duct and a tall papilla originating both from palliai floor and roof. Brood egg masses of mature females contained from 15 to 65 egg capsules. The triangular-shaped egg capsules measured between 2.2 and 3.4 mm in length and between 2.3 and 3.8 mm in width. Each egg capsule contained between 129 and 563 eggs. The number of eggs per capsule and the egg diameter did not correlate with female shell length. Uncleaved eggs measured between 180 and 200 μm in diameter. They all developed synchronously within the egg capsules. Prehatching veliger shells measured between 260 and 300 μm in length. After hatching at the veliger stage, protoconch length during metamorphosis ranged between 700 and 800 μm. These parameters neither coincide with those reported by Hoagland (1977) for the similar Californian Crepidula onyx, nor with the reproductive characters reported by Miloslavich & Penchaszadeh (2001) for Crepidula aplysioides, which supposedly occurs in the region.Fil:Cledón, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina.Fil:Penchaszadeh, P.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina

The Need Of More Rigorous Assessments Of Marine Species Introductions: A Counter Example From The Brazilian Coast

[No abstract available]671/Fev241243Araújo-Silva, C.L., (2010), Taxonomia e aspectos ecológicos de Tanaidacea (Crustacea: Peracarida) da Plataforma Continental e bancos oceânicos do nordeste do Brasil, coletados durante o programa REVIZEE-NE. MSc thesis, Universidade Federal de PernambucoBarnard, J.L., The marine fauna of New Zealand: algae-living littoral Gammaridea (Crustacea Amphipoda) (1972) N. Z. Oceanogr. Inst. Mem., 62, pp. 1-216Brum, I.N.S., Ocorrência de " Apseudes intermedius" Hansen, 1895 e " Tanais cavolinii" Milne-Edwards, 1829, no litoral brasileiro (Crustacea, Tanaidacea) (1969) Rvta Bras. Biol., 29 (4), pp. 601-605Carlton, J.T., Deep invasion ecology and the assembly of communities in historical time (2009) Biological Invasions in Marine Ecosystems, pp. 13-56. , Springer-Verlag, Heidelberg, G. Rilov, J.A. Crooks (Eds.)Cartwright, P., Halgedahl, S.L., Hendricks, J.R., Jarrard, R.D., Marques, A.C., Collins, A.G., Lieberman, B.S., Exceptionally preserved jellyfishes from the Middle Cambrian (2007) PLoS ONE, 2 (10), pp. 1-7Chapman, J.W., Carlton, J.T., A test of criteria for introduced species: the global invasion by the isopod Synidotea laevidorsalis (Miers, 1881) (1991) J. Crust. Biol., 11, pp. 386-400Collins, A.G., Bentlage, B., Gillan, W., Lynn, T.H., Morandini, A.C., Marques, A.C., Naming the Bonaire banded box jelly, Tamoya ohboya, n. sp. (Cnidaria: Cubozoa: Carybdeida: Tamoyidae) (2011) Zootaxa, 2753, pp. 53-68Farrapeira, C.M.R., Tenório, D.O., Amaral, F.D., Vessel biofouling as an inadvertent vector of benthic invertebrates occurring in Brazil (2011) Mar. Pollut. Bull., 62 (4), pp. 832-839Fehlauer-Ale, K., Vieira, L.M., Winston, J.E., Molecular and morphological characterization of Amathia distans Busk and Amathia brasiliensis Busk (Bryozoa: Ctenostomata) from the tropical and subtropical Western Atlantic (2011) Zootaxa, 2962, pp. 49-62Godwin, L., (2003), Hull fouling as a pathway for marine invasions to Hawaii: analysis of vectors and developing management strategies. In: Proc. 3rd Int. Conf. Marine Bioinvasions, La JollaKrapp-Schickel, T., Ruffo, S., The Maera quadrimana - complex (Crustacea Amphipoda, Melitidae) demands a new concept: Quadrimaera n.gen. (with description of three new species from Western Atlantic) (2000) Boll. Mus. Civico Stor. Nat. Verona, 24, pp. 193-214Lazoski, C., Solé-Cava, A.M., Boury-Esnault, N., Klautau, M., Russo, C.A.M., Cryptic speciation in a high gene flow scenario in the oviparous marine sponge Chrondrosia reniformis (2001) Mar. Biol., 139, pp. 421-429(2009) Informe sobre as Espécies Exóticas Invasoras Marinhas no Brasil, , Ministério do Meio Ambiente, Brasília, R.M. Lopes (Ed.)Marques, A.C., Invasives: sea of data still to come (2011) Science, 333, p. 936Marques, A.C., Lamas, C.J.E., Taxonomia zoológica no Brasil: estado da arte, expectativas e sugestões de ações futuras (2006) Pap. Av. Zool., 46 (13), pp. 139-172Migotto, A.E., Marques, A.C., (2006) Invertebrados marinhos, in: Avaliação do estado do conhecimento da diversidade brasileira - Série Biodiversidade, , Ministério do Meio Ambiente, Brasília, pp. 147-202Miranda, L.S., Haddad, M.A., Mills, C.E., Marques, A.C., The South African Lucernariopsis capensis Carlgren, 1938 (Staurozoa, Cnidaria) in Brazil: first record outside of the type-locality (2012) Zootaxa, 3158, pp. 60-64Morales-Vela, B., Suarez-Morales, E., Padilla-Saldivar, J., Heard, R.W., The tanaid Hexapleomera robusta (Crustacea: Peracarida) from the Caribbean manatee, with comments on other crustacean epibionts (2008) J. Mar. Biol. Assoc. UK, 88 (3), pp. 591-596Pinheiro, U.S., Hajdu, E., Custódio, M.R., Aplysina Nardo (Porifera, Verongida, Aplysinidae) from the Brazilian coast with description of eight new species (2007) Zootaxa, 1609, pp. 1-51(2009) Estado da Arte e Perspectivas para a zoologia no Brasil, , Sociedade Brasileira de Zoologia/Ed. UFPR, Curitiba, R.M. Rocha, W.A. Boeger (Eds.)Slobodov, S.A., Marfenin, N.N., Reproduction of the colonial hydroid Obelia geniculata (L., 1758) (Cnidaria, Hydrozoa) in the White Sea (2004) Hydrobiologia, 530 (531), pp. 383-388Spalding, M.D., Fox, H.E., Allen, G.R., Davidson, N., Ferdaña, Z.A., Finlayson, M., Halpern, B.S., Robertson, J., Marine ecoregions of the world: a bioregionalization of coastal and shelf areas (2007) BioScience, 57 (7), p. 573Thiel, M., Gutow, L., The ecology of rafting in the marine environment. II. The rafting organisms and community (2005) Oceanogr. Mar. Biol. Ann. Rev., 43, pp. 279-418Vieira, L.M., Migotto, A.E., Winston, J.E., Shallow-water species of Beania Johnston, 1840 (Bryozoa, Cheilostomata) from the tropical and subtropical Western Atlantic (2010) Zootaxa, 2550, pp. 1-2