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Instituto De Biologia Prochaetodermatidae (Aplacophora , Mollusca) Do Sudeste Do Brasil Prochaetodermatidae (Aplacophora , Mollu

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Instituto De Biologia Prochaetodermatidae (Aplacophora , Mollusca) Do Sudeste Do Brasil Prochaetodermatidae (Aplacophora , Mollu UNIVERSIDADE ESTADUAL DE CAMPINAS INSTITUTO DE BIOLOGIA PAULO VINICIUS FERRAZ CORRÊA PROCHAETODERMATIDAE (APLACOPHORA , MOLLUSCA) DO SUDESTE DO BRASIL PROCHAETODERMATIDAE (APLACOPHORA , MOLLUSCA) FROM SOUTHEASTERN BRAZIL CAMPINAS 2016 PAULO VINICIUS FERRAZ CORRÊA PROCHAETODERMATIDAE (APLACOPHORA , MOLLUSCA) FROM SOUTHEASTERN BRAZIL PROCHAETODERMATIDAE (APLACOPHORA , MOLLUSCA) DO SUDESTE DO BRASIL Dissertação apresentada ao Instituto de Biologia da Universidade Estadual de Campinas como parte dos requisitos exigidos para a obtenção do título de Mestre em Biologia Animal, na Área de Biodiversidade Animal Dissertation presented to the Institute of Biology of the University of Campinas in partial fulfillment of the requirements for the degree of Master, in the area of Animal Biodiversity ESTE ARQUIVO DIGITAL CORRESPONDE À VERSÃO FINAL DA DISSERTAÇÃO DEFENDIDA PELO ALUNO PAULO VINICIUS FERRAZ CORRÊA E ORIENTADA PELO PROF. DR. FLÁVIO DIAS PASSOS. Orientador: Prof. Dr. Flávio Dias Passos CAMPINAS 2016 Campinas, 29 de agosto de 2016 COMISSÃO EXAMINADORA Prof. Dr. Flávio Dias Passos (Orientador) Dr. Carlo Magenta Cunha Prof. Dr. José Eduardo Amoroso Rodriguez Marian Os membros da Comissão Examinadora acima assinaram a Ata de Defesa, que se encontra no processo de vida acadêmica do aluno. Ao meu Pai, minha mãe e meu irmão, e a todos que já se dedicaram ao estudo de Aplacophora. Agradecimentos Ao meu orientador Flávio, por todo o apoio e conselhos e sugestões durante todos esses anos em que estivemos juntos. Obrigado pela oportunidade de trabalhar com um grupo tão fascinante e desconhecido. Irei sempre levar comigo seus ensinamentos em taxonomia e anatomia. A Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) pela bolsa de estudo concedida. Ao Programa de Pós-Graduação Biologia Animal da Universidade Estadual de Campinas, pela formação que me proporcionaram. À Petrobras e ao CENPES, por ter coletado o material e disponibilizado ao nosso laboratório. Ao Laboratório de Microscopia Eletrônica, e as técnicas Adriane e Stella, por terem permitido e me auxiliada na obtenção das imagens de varredura. Ao Marcel Sabino Miranda, por trabalhado junto comigo e por todo o suporte que você deu a mim e o Flávio. Aos funcionários do Museu Nacional de História Natural em Washington, por terem disponibilizado a coleção de Aplacophora. À falecida Dra. Amélie Scheltema e a Dra. Cristiane Todt, por terem sido tão receptivas com o nosso grupo de pesquisa e por todo os seus incentivos que nos deram nesses últimos anos. À todos ou meus colegas e amigos de departamento, Amanda, Pedro, Fabrízio, Ana Paula e Karine, por todos os seus conselhos e momentos divertidos. Aos meus amigos da minha amada turma de Biologia que mantiveram contato, em especial à Jurema e Carlos, que sempre me apoiaram. Aos Professores(as) Doutores(as) André Garraffoni, Carlo Magenta, Cecília Amaral, José Eduardo Marian, Lenita Tallarico e Michela Borges que contribuíram em muito para o enriquecimento desse trabalho com comentários e sugestões durante a qualificação, a pré-banca e a defesa. À toda minha família, incluindo primos, tios e avôs, e em especial aos meus pais e meu irmão, por todo o suporte que me deram e por sempre estarem ao meu lado, me aconselhando e torcendo por mim. À Helen, por todo e seu carinho e atenção, e por ter me ajudado com as suas correções. Resumo Prochaetodermatidae Salvini-Plawen, 1972 constitui uma família de Caudofoveata cujas espécies são caracterizadas pelo estreitamento da região posterior do corpo (como uma cauda), a presença de um escudo oral bipartido e um par de mandíbulas conectado a uma rádula dística com uma placa central entre cada par de dentes. Até o momento, essa família possui 39 espécies agrupadas em seis gêneros. Recentemente, foram coletados espécimes de Caudofoveata no Sudeste do Brasil, incluindo de Prochaetodermatidae, na costa dos estados do Rio de Janeiro e Espírito Santo, pelos Projetos HABITATS e AMBES. Utilizando técnicas de microscopia de luz e eletrônica de varredura, os exemplares foram analisados quanto à morfologia externa e quanto aos detalhes da estrutura das espículas; também foram comparados com material-tipo de algumas espécies depositadas no National Museum of Natural History, em Washington, EUA. Dentre 88 amostras com 102 exemplares analisados, foram identificadas cinco espécies de dois gêneros: Claviderma Scheltema & Ivanov, 2000 e Spathoderma Scheltema, 1985. Claviderma apresenta espículas do tronco alongadas, o eixo longitudinal reto ou pouco curvado, a divisão entre base e lâmina é pouco evidente, e por serem levemente curvadas em direção ao corpo. Já em Spathoderma, as espículas do tronco possuem a base larga e uma lâmina bastante afunilada, a lâmina apresenta uma leve quilha central e o plano da lâmina é curvado para fora e rotacionado em relação ao plano da base. Claviderma crassum Ivanov & Scheltema 2008, C. amplum Ivanov & Scheltema, 2008 e Spathoderma quadratum Ivanov & Scheltema, 2008 foram descritas para o Atlântico Norte e agora têm sua distribuição ampliada para o Brasil, no Atlântico Sul. Spathoderma bulbosum Ivanov & Scheltema, 2008, já registrada para o Nordeste do Brasil, igualmente, tem sua distribuição estendida mais ao sul. Suas distribuições batimétricas também serão ampliadas e as descrições originais complementadas, com a caracterização de variações na morfologia e espículas. Além disso, é descrita uma nova espécie de Claviderma, caracterizada pelo tronco alongado e uma cauda curta e por possuir variações nas espículas da cauda nunca ilustradas para o gênero até agora. Abstract Prochaetodermatidae Salvini-Plawen 1972 is a family of Caudofoveata whose species are characterized by a narrow in the posterior region of the body (like a tail), the presence of a bipartite oral shield and a pair of jaws connected to a distichous radula with a central plate between each pair of teeth. This family has 39 species grouped into six genera up to date. Recently, specimens of Caudofoveata, including Prochaetodermatidae, were collected in southeastern Brazil, off Rio de Janeiro and Espírito Santo states, by the HABITAT and AMBES Projects. Using techniques of light microscopy and scanning electron microscopy, specimens were analyzed for external morphology and for details of the structure of sclerites; they were also compared with the type material of some species deposited in the National Museum of Natural History in Washington, USA. A total of 88 samples with 102 specimens were analyzed and five species from two genera were identified: Claviderma Scheltema & Ivanov, 2000 and Spathoderma Scheltema, 1985. Claviderma have trunk sclerites elongated, with the longitudinal axis straight or slightly curved, the division between base and blade is not evident, and they are slightly curved towards the body. In Spathoderma, the trunk sclerites have a broad base, a tapered blade, the blade has a slight central keel and the blade plane is bended outwards and rotated in relation to the base plane. Claviderma crassum Ivanov & Scheltema 2008, C. amplum Ivanov & Scheltema, 2008 and Spathoderma quadratum Ivanov & Scheltema, 2008 were described for the North Atlantic Ocean and now they have their geographic distribution expanded to Brazil, in the South Atlantic. Spathoderma bulbosum Ivanov & Scheltema, 2008 were already recorded for the Northeast Brazil and, likewise, its distribution is extended further south. Their bathymetric distributions are also increased and original descriptions are complemented with the characterization of variations in morphology and sclerites. Additionally, a new species of Claviderma is described, characterized by an elongated trunk and a short tail and it has shank sclerites with variations that were never illustrated for the genus so far. Lista de Ilustrações Figura 1. Hipóteses de filogenia dos Mollusca. A. “Hipótese Testaria” (WALLER, 1998), onde Aplacophora (Solenogastres + Caudofoveata) é um grupo irmão de Testaria (Polyplacophora + Conchifera). B. “Hipótese Aculifera” (SCHELTEMA, 1993; VINTHER 2015), onde Aplacophora é um grupo monofilético e irmão de Polyplacophora, formando o grupo Aculifera. Esse por sua vez é grupo irmão dos demais moluscos. C. “Hipótese Hepagastralia” (HASZPRUNAR 2000), onde Testaria é um grupo irmão de Caudofoveata, formando o clado Hepagastralia. Este seria um grupo irmão de Solenogastres. D. “Hipótese Adenopoda” (SALVINI-PLAWEN 1985), onde Testaria é um grupo irmão de Solenogastres, formando o clado Adenopoda. Este seria um grupo irmão de Caudofoveata. ........................................................................... 15 Figura 2. Um exemplo de um Prochaetodermatidae. A. Vista lateral esquerda, sob estereomicroscópio, mostrando as principais divisões do corpo (indicado por setas). B. Detalhe da região anterior, sob microscopia eletrônica de varredura, mostrando o disco oral e suas espículas em volta (destacado em vermelho) e a divisão entre o anterium e o tronco (linha tracejada). an - anterium, ca - cauda (shank), do - disco oral (oral shield), fr - franja (fringe), po – ponta (knob) e tr - tronco (trunk). Posterium equivale a região da cauda + ponta. Escalas em A: 500 µm e B: 200 µm.................. 17 Figura 3. Litoral sudeste do Brasil, mostrando os pontos que foram amostrados nos Projetos HABITATS e AMBES. .......................................................................................... 20 Figure 4. Map showing the location (grey points) of all collected samples of all species of Prochaetodermatidae gathered from the literature.
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