The parasitic crustaceans from the Brazilian Amazon. 15. Gamispatulus schizodontis gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) from the nasal fossae of Schizodon fasciatus AGASSIZ

The female of Gamispatulus schizodontis gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) is described from the nasal fossae of an Amazonian fish, Schizodon fasciatus AGASSIZ. The new genus differs from the other genera of the family by having a lateral retrostylet with a medial spatulate process, a wide flat rostral projection and a S-segmented antennule

The parasitic crustaceans of fishes from the Brazilian Amazon. 12. Ergasilus hydrolycus n.sp. (Copepoda: Poecilostomatoida) from Hydrolycus scomberoides (CUVIER)

The female of Ergasilus hydrolycus n. sp. is described from specimens taken from the gills of an Amazonian fish, Hydrolycus scomberoides (CUVIER). The new species is similar to E. bryconis THATCHER, 1981, and to E. jaraquensis THATCHER & ROBERTSON, 1982, in the form of the body, antennae and legs, and in having a curved pectinate seta on the terminal segment of the first exopod. The new species is distinguished from the other two by having a single seta representing the fifth leg, instead of two, and by having a relatively larger antennal claw. Additionally, the pigmentation of E. hydrolycus n. sp., is limited to a single transverse band at the level of the mouth while in the other two species it is diffuse and distributed throughout the body. Also, the uropod of the new species has two main setae and that of E. bryconis has three. The new species is larger than E. jaraquensis

The parasitic crustaceans of fishes from the Brazilian Amazon. 13. Gamidactylus jaraquensis gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) from the nasal fossae of Semaprochilodus insignis (SCHOMBURGK)

The female of Gamidactylus jaraquensis gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) is described from the nasal fossae of an Amazonian fish, Seniprochilodus insignis (SCHOMBURGK). The new genus differs from the two known species of Vaigamus in having a two-clawed antenna and in lacking the rostral spine

The parasitic crustaceans of fishes from the Brazilian Amazon, 14, Gamispinus diabolicus gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) from the nasal fossae of Ageneiosus brevifilis VALENCIENNES

The female of Gamispinus diabolicus gen. et sp. nov. (Copepoda: Poecilostomatoida: Vaigamidae) is described from the nasal fossae of an Amazonian fish, Ageneiosus brevifitis VALENCIENNES. The new genus differs from the other two genera of the family (Vaigamus and Gamidactylus) in having a five-segmented antennule and an antenna which terminates in one fixed and two moveable spines

Neotropical Monogenoidea. 21. Trinigyrus mourei sp.n. (Dactylogyridae) from the gills of the Amazonian catfish Hypostomus marginatus (Loricariidae)

Trinigyrus mourei sp. n. (Dactylogyridae) is described from an Amazonian armoured catfish, Hypostomus emarginatus (Loricariidae) in Brazil. The new species closely resembles T. hypostomatis HANEK, MOLNAR & FERNANDO, 1974, from which it differs mainly by having: 1) a more robust copulatory organ; 2) a non-articulated accessory piece; and 3) comparatively longer haptoral appendages

Evaluation of sampling and analysis techniques for early detection of Limnoperna fortunei (Mytilidae) in limit areas of its distribution

The golden mussel Limnoperna fortunei (Dunker, 1857) (Mytilidae) is an invading species in continental waters in the Neotropical Region. L. fortunei is transported by human activities. Differing from fresh water bivalves native to the region, this mytilid has external fertility and a planktonic larval development similar to marine mytilids (Monteiros-Ribas et al.. 2006). The impact produced by L. fortunei on numerous South American rivers includes, among others, alteration of benthonic communities, alteration of fish diet, as well as severe macrofouling problems at industrial water intakes (Darrigran. 2002). Thus, it is fundamental to know the dynamic distribution of this invading species to explain its invading process and to have access to basic information to predict its distribution/ dispersion pattern.Facultad de Ciencias Naturales y Muse

Evaluation of sampling and analysis techniques for early detection of Limnoperna fortunei (Mytilidae) in limit areas of its distribution

The golden mussel Limnoperna fortunei (Dunker, 1857) (Mytilidae) is an invading species in continental waters in the Neotropical Region. L. fortunei is transported by human activities. Differing from fresh water bivalves native to the region, this mytilid has external fertility and a planktonic larval development similar to marine mytilids (Monteiros-Ribas et al.. 2006). The impact produced by L. fortunei on numerous South American rivers includes, among others, alteration of benthonic communities, alteration of fish diet, as well as severe macrofouling problems at industrial water intakes (Darrigran. 2002). Thus, it is fundamental to know the dynamic distribution of this invading species to explain its invading process and to have access to basic information to predict its distribution/ dispersion pattern.Facultad de Ciencias Naturales y Muse

ESTADO DA ARTE DAS PESQUISAS COM O CARANGUEJO-UÇÁ, Ucides cordatus

A member of Ocypodidae, the mangrove land crab, Ucides cordatus, is endemic to the Atlantic Coast of the Americas. It has considerable economic value to underpriviledged communities, which depend on it as a source of income and food. Ucides cordatus is considered as one of the most important biological components of mangrove ecosystems, particularly due to its role in the cycling of organic matter. Possibly as a consequence of the intense harvesting, the destruction of its habitats – the mangroves – and disease, there has been a decrease in the fishery stocks of the mangrove crab throughout the Brazilian coast. However, in spite of the cultural, ecological, and socio-economic importance of the species, the number of scientific studies on the mangrove land crab is still limited. The aim of the present study is to identify and relat the main studies published on the species until 2007.Pertencente a Ocypodidae, o caranguejo-uçá, Ucides cordatus, é uma espécie endêmica da costa atlântica do Continente Americano. Possui grande importância econômica para populações de baixo poder aquisitivo, que dependem de sua captura como fonte de renda e alimento. Ucides cordatus é considerado um dos componentes biológicos mais importantes do ecossistema dos manguezais por seu papel na ciclagem de matéria orgânica. Possivelmente, em virtude do intenso esforço de captura somado à destruição de seus habitats - os manguezais – e a uma enfermidade específica, têm-se observado uma tendência de redução dos estoques pesqueiros de caranguejo-uçá no litoral brasileiro. Porém, a despeito de sua importância cultural, ecológica e sócio-econômica, o número de pesquisas científicas desenvolvidas com a espécie ainda é limitado. O objetivo deste trabalho foi identificar e apresentar os principais estudos publicados sobre a espécie até o ano de 2007