Abstract Sponge-ophiuroid ecological associations, which are important in the dynamics of marine populations and communities, have been recorded for a long time. In this study, we report new records of interactions between sponges and ophiuroids, which were obtained by analyzing biological collections, to increase knowledge about the associations between these animals. The study observed 14 interactions between sponges and ophiuroids, eight of which are new to science: Ophiocnida scabriuscula and Agelas sp., Ophiothrix sp. and Monanchora arbuscula, Ophiactis quinqueradia and M. arbuscula, O. quinqueradia and Callyspongia ( Cladochalina) aculeata, Ophiactis savignyi and Agelas dispar, O. savignyi and M. arbuscula, O. savignyi and Topsentia ophiraphidites, and O. savignyi and Dysidea etheria. The specimens found were collected in four areas of the northeastern Brazilian coast (tropical southwestern Atlantic), including a conservation area and a mesophotic coral ecosystem. Thus, the continuation of studies and the implementation of conservation strategies for these environments are essential. Finally, the importance of biological collections as a crucial data source for biodiversity studies is reinforced. Spongeophiuroid Sponge ophiuroid communities time ophiuroids animals 1 science sp arbuscula M O Cladochalina aculeata dispar ophiraphidites etheria tropical Atlantic, Atlantic , Atlantic) ecosystem Thus essential Finally reinforced

Abstract The introduction of species beyond their natural distribution area as a result of human activities is one of the main threats to marine biodiversity. In 2019, Perna viridis , an Indo-Pacific mytilid, was recorded for the first time in the coast of Brazil in Guanabara Bay (Rio de Janeiro State). In 2021, this species was recorded in the Northeast region of Brazil (Fortaleza, Ceará State). This record was subsequently replicated in studies from 2022, 2023, and 2024. The specimens from Ceará State were deposited in the malacological collection “Prof. Henry Ramos Matthews - Série B” of the Universidade Federal do Ceará. During a curation activity of this collection, these specimens were reanalyzed and their identification questioned. Therefore, this study aimed to confirm the record of P. viridis for the Northeast region of Brazil. According to the analyses, the individuals collected on the coast of Ceará are not P. viridis , but belong to Mytella strigata , a native species of the coast of South America. Thus, the occurrence of P. viridis in the Southwestern Atlantic remains restricted to the southeast region of Brazil. biodiversity 2019 IndoPacific Indo Pacific mytilid Rio State. . State) 2021 Fortaleza, Fortaleza (Fortaleza 2022 2023 2024 Prof. Prof “Prof B questioned Therefore P analyses America Thus 201 202 20 2

Resumé: Le contrat d’agence commerciale qui peut être défini comme celui régissant les rapports entre l’agent et le principal est né avec l'évolution du commerce et le besoin naturel d'expansion des affaires sur le territoire national ou international. En effet, l'impossibilité d’ouvrir un établissement sur tous les territoires, en plus d'autres obstacles comme la langue, font de l'agent commercial une figure importante et présente, notamment dans le cadre du commerce international. Dans cette perspective, cette étude problématisera, la question de savoir quelle est la place actuellement de l’autonomie de la volonté dans les contrats internationaux d’agence commerciale au sein de l’Union européenne (UE) et du Mercosur et son importance, compte tenu de l’inexistence à ce jour d’un droit international uniforme en la matière. La recherche se caractérise comme exploratoire, avec une approche qualitative, élaborée à partir de recherches bibliographiques. A partir d’une révision de la littérature spécialisée, de la jurisprudence et des lois applicables, l’étude permet d’affirmer que l’autonomie de la volonté a encore une place limitée dans l’ordre juridique, notamment au sein des pays du Mercosur.

Abstract: The agency contract, which can be defined as the one governing the relationship between the agent and the principal, was born with the evolution of trade and the natural need for business expansion on national or international territory. Indeed, the impossibility of opening an establishment in all territories, in addition to other obstacles such as language, make the commercial agent an important and common figure, particularly in the context of international trade. Thus, this study will problematize the question of the current place of parties' autonomy in international commercial agency contracts within the European Union (EU) and Mercosur and its importance, given the absence of a uniform international law in this area. Based on a review of the specialized literature, case law and positive law, the study confirms that parties' autonomy still has a limited place in the legal order, particularly in the countries of the Mercosur.