ABSTRACT
The Malacological Collection of the Biological Institute of Federal University of Rio de Janeiro figures as an important repository of specimens, containing c.a. 21,000 lots, most of them collected at deep sea of southeast Brazil. A critical review of literature and types deposited in this collection revealed the existence of 191 lots containing type specimens (23 holotypes and 168 paratypes), corresponding to 129 nominal species divided in three classes: Gastropoda (109 names, subdivided in 62 Caenogastropoda; 32 Heterobranchia and 15 Vetigastropoda), Bivalvia (17 names subdivided in 10 Protobranchia; 6 Heterodonta and 1 Pteriomorphia), and Scaphopoda (3 names). For each species, an updated list of data is provided, including the collecting location (revised or corrected, when necessary), number of specimens actually present (i.e., physically found in the collection), nomenclatural acts (if needed) and any other specific issue concerning particular species. It is beyond the scope of this study to discuss classifications or promote subjective judgment on taxonomy at any level for names treated here.
Subject(s)
Bivalvia , Gastropoda , Animals , BrazilABSTRACT
As a part of the Environmental Characterization of the Campos Basin project, we obtained samples from the continental slope benthos. As a consequence, specimens of Tindariopsis aeolata (Dall, 1889) and Tindariopsis agathida (Dall, 1889) were found. These species show prodissoconch surface sculpture patterns that were never seen for species of Tindariopsis. The presence of this kind of sculpture in the type species of the genus, T. agathida, adds diagnostic characters to the genus. T. agathida and T. aeolata are typical from the Caribbean Realm (Guyana and Tobago). This is the first record of T. aeolata in the southernmost area of the Atlantic Ocean, and also the shallowest record (1000 m) for this species. With this finding of specimens from the Bacia de Campos, the distribution of T. agathida can now be extended in the Brazilian coast from 7º to 22º S.
Como parte do projeto de Caracterização Ambiental da Bacia de Campos obtivemos uma série de amostras do talude continental. Como conseqüência foram encontrados exemplares de Tindariopsis aeolata (Dall, 1889) e Tindariopsis agathida (Dall, 1889). Ambas as espécies apresentam um padrão de escultura na superfície da prodissoconcha ainda não encontrado em espécies de Tindariopsis. A presença deste tipo de escultura na espécie tipo do gênero, T. agathida, adiciona características diagnósticas para o gênero. T. agathida e T. aeolata são espécies típicas do Domínio do Caribe (Guiana e Tobago). Este é o primeiro registro de T. aeolata na região mais ao sul do Oceano Atlântico, e também o registro batimétrico mais raso (1000 m) referido para a espécie. Com o encontro destes espécimes da Bacia de Campos, a distribuição geográfica de T. agathida pode ser então estendida, na costa brasileira, de 7º S até 22º S.
ABSTRACT
As a secondary result of oil prospecting in Brazil, samples from the Campos Basin continental slope became available. In these samples, specimens of the genera Microgloma Sanders & Allen, 1973 and Pristigloma Dall, 1900 were found. This contribution provides the southernmost record of the genus Microgloma, the first record of Microgloma mirmidina (Dautzenberg & Fischer 1897) from the western Atlantic, the descriptions of Microgloma macaronsp. n. and Microgloma nhandutisp. n.as new species, and the shallowest record of Pristigloma alba Sanders & Allen 1973.
ABSTRACT
One hundred senventy-five species of marine mollusks have been identified in the Expedition Espírito Santo I. Standing out the species Margarites olivaceus (Brown, 1827); Cyclostremiscus caraboboensis Weishord, 1962; Balcis gibba Folin, 1867; Triphora compsa (Dall, 1927); Henrya af. goldmani Bartsh, 1947 and Limaea subovata Jeffreys, 1876 as they have not been previously assigned to Brazil. The analysis of the geographical distribution patterns points out the dominance of the species with thermophiles affinities. This situation evidences the importance of the Brazilian Current in the maintanance of the biogeographical structure of the studied region. However, it is the analysis of the cryophiles species that shows the Cabo Frio region as an ecological filter quite more permeable to the species with thermophile affinities than to the cryophiles ones. The existence of this barrier and the endemism rate (4.27%) characterize the region that extends from the south of Cabo Frio as a transition between the two patterns cited above. Therefore they do not corroborate in malacological parameters the proposition made by Palacio (1982) for the individualization of the Paulista Province.
