Desenvolvimento Larval de Camarões Palaemonídeos da região Amazônica obtido em laboratório. VII. Desenvolvimento abreviado de Pseudopalaemon amazonensis Ramos-Porto, 1979 (Crustacea: Dccapoda: Caridea)

Larval development of the freshwater shrimp Pseudopalaemon amazonensis Ramos-Porto was studied in the laboratory based on the offspring of ovigerous females collected in a small "terra-firme" forest stream near Manaus, Brazil. Ovigerous females with a mean total length of 36.5 ± 1.9 mm carried 13-19 eliptical, yolk-rich eggs measuring 2.55 ± 0.16 x 1.64 ± 0.11 mm. The larval period consisted of 3 benthie stages and the larvae accomplished metamorphosis after 7-8 days without feeding. The newly-hatched larva had sessile eyes and all appendages, except for the uropods; chelipeds were present as uniramous buds, but walking legs were fully developed and functional. Descriptions and illustrations of the 3 larval and first juvenile stages are presented.Foi estudado o desenvolvimento larval do camarão dulcícola Pseudopalaemon amazonensis Ramos-Porto criado em laboratório, a partir das larvas eclodidas de fêmeas ovadas coletadas em um pequeno igarapé de terra-firme das proximidades de Manaus, Brasil. Fêmeas ovadas de comprimento total médio de 36,5 ± 1,9 mm carregavam 13-19 ovos elípticos e ricos em vitelo, medindo 2,55 ± 0,16 x 1,64 ± 0,11 mm. O período larval consistiu de 3 estágios larvais bentônicos e as larvas alcançaram a metamorfose após 7-8 dias, sem ingestão de alimento. A larva recém-eclodida apresentou olhos sésseis e todos os apêndices, à exceção dos urópodos; queliopodos estavam presentes na forma de botões unirremes, mas as pernas locomotoras estavam totalmente desenvolvidas e funcionais. São apresentadas as descrições e ilustrações dos 3 estágios larvais e do 1o estágio de juvenil

The Larval Development of Palaemonid Shrimps from the Amazon region reared In the laboratory. VII. Abbreviated development of Pseudopalaemon amazonensis Ramos-Porto, 1979 (Crustacea: Decapoda: Caridea)

Larval development of the freshwater shrimp Pseudopalaemon amazonensis Ramos-Porto was studied in the laboratory based on the offspring of ovigerous females collected in a small "terra-firme" forest stream near Manaus, Brazil. Ovigerous females with a mean total length of 36.5 ± 1.9 mm carried 13-19 eliptical, yolk-rich eggs measuring 2.55 ± 0.16 x 1.64 ± 0.11 mm. The larval period consisted of 3 benthie stages and the larvae accomplished metamorphosis after 7-8 days without feeding. The newly-hatched larva had sessile eyes and all appendages, except for the uropods; chelipeds were present as uniramous buds, but walking legs were fully developed and functional. Descriptions and illustrations of the 3 larval and first juvenile stages are presented.Foi estudado o desenvolvimento larval do camarão dulcícola Pseudopalaemon amazonensis Ramos-Porto criado em laboratório, a partir das larvas eclodidas de fêmeas ovadas coletadas em um pequeno igarapé de terra-firme das proximidades de Manaus, Brasil. Fêmeas ovadas de comprimento total médio de 36,5 ± 1,9 mm carregavam 13-19 ovos elípticos e ricos em vitelo, medindo 2,55 ± 0,16 x 1,64 ± 0,11 mm. O período larval consistiu de 3 estágios larvais bentônicos e as larvas alcançaram a metamorfose após 7-8 dias, sem ingestão de alimento. A larva recém-eclodida apresentou olhos sésseis e todos os apêndices, à exceção dos urópodos; queliopodos estavam presentes na forma de botões unirremes, mas as pernas locomotoras estavam totalmente desenvolvidas e funcionais. São apresentadas as descrições e ilustrações dos 3 estágios larvais e do 1o estágio de juvenil

Situação sistemática e biogeográfica de Fredius reflexifrons (Ortmann, 1897) e Fredius fittkaui (Bott, 1967) (Crustacea: Brachyura: Pseudothelphusidae) das bacias do rio Amazonas e dos rios costeiros das Guianas

There is considerable confusion in the literature regarding the systematic position and distribution of two pseudothelphusid crabs originally described as Potamocarcinus reflexifrons Ortmann, 1897 and Potamocarcinus reflexifrons fittkaui Bott, 1967, and now included in the genus Fredius Pretzman, 1965, as F. reflexifrons and F. fittkaui. Study of numerous specimens from recent collections, together with a critical analysis of the data published in the literature, shows that both taxa could be easily separated by gonopodal characters. The two species occupy discrete areas of distribution along the main axis of the Amazon River and in the upper Rio Negro Basin, respectively, with an overlap in the Atlantic Guianas. It is postulated that they originated from a common ancestor, through a process of vicariance, in the two areas observed at present. Permeability of barriers allowed their further occupancy of the Atlantic Guianas after the marine regressions in this area.Há uma considerável confusão na literatura a respeito da posição sistemática e distribuição de duas espécies de caranguejos pseudotelfusídeos originalmente descritos como Potamocarcinus reflexifrons Ortmann, 1897 e Potamocarcinus reflexifrons fittkaui Bott, 1967, atualmente incluídos no gênero Fredius Pretzmann, 1965 como F. reflexifrons e F. fittkaui. O estudo de numerosos espécimes obtidos em coletas recentes, complementado por uma análise crítica dos dados publicados na literatura, mostra que ambos os taxa podem ser facilmente separados por caracteres do gonópodo. As duas espécies ocupam áreas de distribuição distintas ao longo do eixo principal do rio Amazonas e no alto rio Negro, respectivamente, com uma sobreposição na região das Guianas. Postula-se que essas espécies se originaram de um ancestral comum, por meio de um processo de vicariância, nas duas áreas observadas atualmente. A permeabilidade das barreiras permitiu uma posterior distribuição na região das Guianas após as regressões marinhas ocorridas naquela área

Description of a new genus and species of Pseudothelphusidae Ortmann, 1893 (Decapoda: Brachyura) from Panama, and new records and remarks on the zoogeography of Trichodactylus quinquedentatus Rathbun, 1893 (Trichodactylidae) in Central America

A collection of freshwater crabs from Central America resulted in the description of a new genus and two new species of pseudothelphusid crabs from Panama, and the record of the trichodactylid Trichodactylus quinquedentatus Rathbun, 1893 from Honduras and Panama. A new monotypic genus, Emberacarcinus n. gen., is erected to accommodate Potamocarcinus darienensis Magalhães, Campos & Turkay, 2013. The two new species and can be distinguished from their respective congeners by the structures of the male first gonopods: Ptychophallus bilobatus n. sp. has a bilobed mesial process whereas Potamocarcinus tapirrhynchus n. sp. exhibits a mesial process as a stout, rounded projection obliquely directed apical-cephalically and partially fused to the mesial lobe of the apical crest. The taxonomic affinities of both species with their closest congeners are treated, and the zoogeographic implication of the new records of T. quinquedentatus in Central America is discussed. © The Author(s) 2019

Palaemonidae, Euryrhynchidae, and Sergestidae (Crustacea: Decapoda): Records of native species from the states of Amapá and Pará, Brazil, with maps of geographic distribution

A list of the distribution records for 18 species of freshwater shrimps of the families Euryrhynchidae (3 spp.), Palaemonidae (13 spp.) and Sergestidae (2 spp.) from the states of Amapá and Pará are presented. All records are documented by voucher specimens deposited in the three main carcinological collections from northern Brazil: Instituto de Pesquisas Científicas e Tecnológicas do Amapá (Macapá), Instituto Nacional de Pesquisas da Amazônia (Manaus), and Museu Paraense Emílio Goeldi (Belém). Maps of the geographic distribution of these records in the eastern Amazon region are offered, and comments on the zoogeography of the species are made. © 2014 Check List and Authors

Looking back to look forward: lessons from four birth cohorts for ageing in the 21st Century

A catalogue of the type specimens of Isoptera, Mantodea, Mecoptera, Orthoptera, Plecoptera, Trichoptera, and Zoraptera deposited in the Invertebrate Collection of the Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brazil, is presented and updated to December, 2007. A total of eight holotypes and seven lots of paratypes of nine species of Isoptera; three holotypes and one paratype of three species of Mantodea; five holotypes and five lots of paratypes of five species of Mecoptera; eight holotypes and five lots of paratypes of eleven species of Orthoptera; three holotypes, three neotypes and two lots of paratypes of seven species of Plecoptera; six holotypes and seven lots of paratypes of ten species of Trichoptera; and two holotypes and three lots of paratypes of three species of Zoraptera, are listed. Specific names are listed alphabetically within the family, followed by bibliographic citation, original genus name, status of type, collection number, locality data and remarks when appropriate.É apresentado o catálogo dos espécimes-tipo de Isoptera, Mantodea, Orthoptera, Plecoptera, Trichoptera e Zoraptera depositados na Coleção de Invertebrados do Instituto Nacional de Pesquisas da Amazônia (INPA), Manaus, Brasil, atualizado até dezembro de 2007. É relacionado um total de sete holótipos e sete lotes de parátipos de nove espécies de Isoptera; três holótipos e um parátipo de três espécies de Mantodea; cinco holótipos e cinco lotes de parátipos de cinco espécies de Mecoptera; oito holótipos e cinco lotes de parátipos de 11 espécies de Orthoptera; três holótipos, três neótipos e dois lotes de parátipos de sete espécies de Plecoptera; seis holótipos e sete lotes de parátipos de dez espécies de Trichoptera; e dois holótipos e três lotes de parátipos de três espécies de Zoraptera. São listados alfabeticamente em cada família os nomes das espécies, seguidos da citação bibliográfica, nome original do gênero, categoria do tipo, número de registro na coleção, dados de localidade e comentários quando pertinentes

The oocyte development of Macrobrachium amazonicum (Heller, 1862), a freshwater shrimp of the Amazon Region (Crustacea: Decapoda: Palaemonidae)

The oocyte development in Macrobrachium amazonicum(Heller, 1862), a freshwater palaemonid shrimp from Central Amazonia is described. This process is similar to thatof Macrobrachium acanthurus(Wiegmann, 1836). The earliest phases occupy the inner ovarian region, while the vitellogenic and the mature phases are found in the outer one. Both post-ovu-latory follicles and follicular cells morphologies are also described and illustrated.É descrito o desenvolvimento ovocitário em Macrobrachium amazonicum(Heller, 1862), um camarão dulcícola da família Palaemonidae da Amazônia Central. O seu desenvolvimento é semelhante ao de Macrobrachium acanthurus(Wiegmann, 1836). As fases iniciais do desenvolvimento ocupam a região intema do ovario, enquanto que as fases vitelogênica e madura situam-se perifericamente. São descritas ainda a morfologia dos folículos pós-ovulatórios e das células foliculares

First confirmed report of a primary freshwater crab (Brachyura: Pseudothelphusidae) associated with bromeliads in the Neotropics

Bromeliads can hold water in their axils, which can harbor an astonishing diversity of macro invertebrates, including decapod crustaceans. Except of a casual report from Trinidad, true freshwater crabs in these phytotelmata have been found exclusively in the Old World, and observations in the New World of crabs associated with bromeliads have been limited to sesarmid crabs, non-primary freshwater crabs that generally do not breed in freshwater. Here we report the presence of a true, or primary, freshwater crab in water-filled axils of a bromeliad in the Neotropics. Immature specimens of the pseudothelphusid crab provisionally identified as Epilobocera cf. gilmanii (Smith, 1870) were collected from inside the bromeliad Hohenbergia penduliflora (A. Richard) Mez. in western Cuba. Pseudothelphusid crabs have developed additional respiratory structures, which make them suitable candidates for a life in phytotelmic microhabitats. It is still uncertain whether in Cuba these crabs actually breed in phytotelmata or only use this microhabitat during their early life stages. © 2016 by The Crustacean Society. Published by Brill NV, Leiden

Range extension of the genus Fredilocarcinus Pretzmann, 1978 (Crustacea: Decapoda: Trichodactylidae) to Colombia

The genus Fredilocarcinus is recorded herein for the first time in Colombia, based on a male of Fredilocarcinus raddai (Pretzmann, 1978) collected in El Vergel, Amazon River, Leticia municipality, Amazonas department. The external morphology and first gonopod are illustrated. © 2015 Check List and Authors