Reencontro de Strombus costatus Gmelin, 1791 (Gastropoda, Strombidae) no litoral do Estado de São Paulo, Brasil

Espécimes vivos de Strombus costatus Gmelin, 1791 foram encontrados no extremo norte da Ilha de São Sebastião (23°44'S), litoral do Estado de São Paulo, decorridos aproximadamente quarenta anos do registro feito por Morretes (1949) de um exemplar proveniente da mesma ilha. Esse autor não informou, entretanto, se obteve o animal completo ou apenas a concha, deixando, para alguns, dúvidas quanto à real existência da espécie na região. Matthews (1980) e Rios (1970, 1975, 1985) consideraram a Ilha da Trindade, na latitude 20°30'S, como o extremo sul da distribuição de S. costatus, não reconhecendo, portanto, o registro feito por Morretes. O presente trabalho vem comprovar a existência dessa espécie no litoral do Estado de São Paulo e estender seu limite meridional de distribuição. S. costatus permanece conhecida apenas de localidades restritas dentro dos limites considerados por Balech (1951) e Ekman (1953) para a Província Antilhana, evidenciando ser endêmica dessa região zoogeográfica

Malacofauna da Cidade Universitária "Armando de Salles Oliveira" - USP. I. Moluscos de ambientes límnicos

Um levantamento da malacofauna de ambientes límnicos da Cidade Universitária "Armando de Salles Oliveira" (CUASO) (23º33'S; 46º43'W), São Paulo, Brasil, realizado de setembro a dezembro de 1989 e de abril a maio de 1990, revelou a presença dos Gastropoda Pomacea sp (Ampullariidae =Pilidae), Biomphalaria tenagophila (Planorbidae), Gundlachia concêntrica (Ancylidae), Physa marmorata e Physa cubensis (Physidae), Lymnaea columella (Lymnaeidae) e dos Bivalvia Eupera sp. e Psidium sp. (Psidiidae), Anodontitestrapesialis (Mutelidae), Diplodon delodontus expansus e Diplodon martensi (Unionidae). A distribuição, alguns aspectos da biologia, da ecologia e uma chave ilustrada para identificação dessas espécies são apresentados com o objetivo de facilitar a localização, o reconhecimento e a manutenção das mesmas em condições de laboratório para fins científicos e/ou acadêmicos

Veneridae (Mollusca, Bivalvia) from the north coast of São Paulo State, Brazil

This study concerns the Veneridae bivalves sampled during the research programs Fauna de Praia/UNICAMP and Biota/FAPESP carried out between August 1995 and July 1997 and between March 2001 and December 2002 respectivelly, in the north coast of São Paulo State, Brazil. A total of 2769 individuals belonging to sixteen species, twelve genera and seven subfamilies were recorded and the characterization of each species improved with detailed redescription and illustrations based on the shell characters. Comparative tables and a identification dichotomic key for subfamilies focused in this study are provided.Coletas intensivas da fauna bentônica marinha da costa norte do Estado de São Paulo, realizadas pelos programas de pesquisa Fauna de Praia/UNICAMP de agosto de 1995 a julho de 1997 e Biota/FAPESP de março de 2001 a dezembro de 2002 recolheram 2769 exemplares pertencentes a dezesseis espécies, doze gêneros e sete subfamílias. A caracterização de cada espécie foi ampliada com redescrição e ilustrações detalhadas, baseadas nos caracteres da concha. Tabelas comparativas dessas características e uma chave dicotômica de identificação das subfamílias são apresentadas neste estudo.00Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Adaptive Convergences In Two Nestling Bivalves (Myoida: Myidae, Hiatellidae) Of The Brazilian Littoral

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Unraveling the structure of squids' spermatophores: a combined approach based on Doryteuthis plei (Blainville, 1823) (Cephalopoda: Loliginidae)

Marian, J.E.A.R. and Domaneschi, O. 2012. Unraveling the structure of squids spermatophores: a combined approach based on Doryteuthis plei (Blainville, 1823) (Cephalopoda: Loliginidae). Acta Zoologica (Stockholm) 93: 281307. Male coleoid cephalopods produce elaborate spermatophores, which function autonomously outside the male body during copulation, undergoing a complicated process of evagination. In order to contribute to the understanding of this unique structure, this study investigated the morphology of the spermatophore of Doryteuthis plei applying several microscopy techniques. A hitherto unreported, much more complex structural arrangement was revealed for the loliginid spermatophore, the most striking findings being: (1) the complex, layered structure of the middle membrane, which bears an additional, chemically distinct segment surrounding part of the cement body; (2) the presence of a space between the inner tunic and middle membrane filled with a fine reticulated material; (3) the presence of stellate particles not only embedded in the spiral filament, but also closely applied to the inner membrane at the level of the cement body; (4) the presence of a pre-oral chamber in the cap region; and (5) the complex organization of the cement body, formed by two distinct layers encompassing contents of different chemical and textural properties. Careful literature reassessment suggests several of these features are common to loliginids, and to some extent to other squids. Their possible functional implications are discussed in light of our knowledge of the spermatophoric reaction mechanics.FAPESPFAPESP [04/13212-7]American Malacological Society (AMS)American Malacological Society (AMS)Houston Conchology SocietyHouston Conchology SocietyCAPESCAPESProvost's Office for Graduate Studies of the University of Sao PauloProvosts Office for Graduate Studies of the University of Sao Paul

Anatomy and behavior of Laternula elliptica, a keystone species of the Antarctic benthos (Bivalvia: Anomalodesmata: Laternulidae).

Laternula elliptica (P. P. King, 1832) is the sole representative of the anomalodesmatan family Laternulidae and the largest bivalve in the Antarctic and Subantarctic. A keystone species of the regional benthic communities, it has reached model status, having been studied in hundreds of scientific works across many biological disciplines. In contrast, its anatomy has remained poorly known, with prior published data limited to partial descriptions based on chemically preserved specimens. Based on observations of aquarium-maintained living animals at the Brazilian Comandante Ferraz Antarctic Station, gross-morphological dissections, and histological sectioning, the comparative anatomy, functional morphology, and aspects of behavior of L. elliptica are described and discussed. Special focus is placed on the pallial organs (including elucidation of cleansing and feeding sorting mechanisms in the mantle cavity) and the musculature. Among the noteworthy findings are the presence of well-developed siphons furnished with sensory tentacles at its tips, some of which bearing eyes; large, folded gills and labial palps capable of sorting the material entering the mantle cavity; an inter-chamber communication in the posterior region of the mantle cavity; an ample ventral mantle fusion with an anterior pedal gape; the absence of a 4th pallial opening; and the absence of a ligamental lithodesma in adult specimens. This study reevaluates the available anatomical data in the literature, both supplementing and correcting previously published accounts