Resumo em Inglês:

The species belonging to this genus are easily distinguished from most of the other Tachinidae by their metallic colour -green, blue or purple, although grey coloured species are known. From the nineteen species cited in the literature, seven are herein redescribed: Chrysotachina braueri Townsend, 1931; Chrysotachina equatorialis (Townsend, 1912); Chrysotachina panamensis Curran, 1939; Chrysotachina peruviana Townsend, 1919; Chrysotachina purpurea Curran, 1939; Chrysotachina townsendi Curran, 1939; Chrysotachina willistoni Curran, 1939. The type material of C. peruviana and C. equatorialis was examined. Illustrations of the male terminalia and of the larvae of C. peruviana are presented. A key for the identification of twelve species from South America is also presented.

Resumo em Inglês:

Some aspects of the ecology of the skink Mabuya agilis (Raddi, 1823) at the restinga habitat of Grumari, in Rio de Janeiro, Brazil are studied. Most of the lizards were first sighted on the ground, though a few were using perches (mainly cacti) up to 30 cm high. Mean body temperature in activity was 33.1 ± 2.4ºC and was significantly correlated to air temperature. There was sexual dimorphism in size (snout-vent length - SVL), with females growing larger than males. Frequency of broken tails was high overall (83%) and did not differ between sexes. Females and males are sexually mature at 49 mm and 47 mm SVL, respectively. Brood size averaged 3.2 ± 1.0 (range 1-5) and was positively and significantly related to female SVL (r = 0.65, p = 0.001). Relative clutch mass (RCM) of seven gravid females averaged 0.250 ± 0.042, being relatively low compared to those of other congeners. The diet of M. agilis was composed basically of arthropods, with relatively large and soft-bodied arthropods such as spiders, caterpillars and homopterans being the most important prey. The results of our work confirm and expand the knowledge of ecological tendencies previously observed for M. agilis in other areas.

Resumo em Inglês:

Horticultural production areas are favorable to development and maintenance of land mollusks populations. To know the mollusk fauna diversity in that kind of production area a research project was conduced in a rural-urban district of Porto Alegre, Rio Grande do Sul, Brazil. The production property studied is located in the Southern zone of the city and has 17 ha of cultivated area. The sampling period was from August/2000 to August/2001, with monthly quantitative collects on the different culture production beds previously selected. Six taxa were registered: Deroceras leave (Müller, 1774) (1.389 specimens = 82,82%), Bradybaena similaris (Férussac, 1821) (195 specimens = 11,7%), Succinea meridionalis d'Orbigny, 1846 (82 specimens = 4,9%), Lamellaxis gracilis (Hutton, 1834) (03 specimens = 0,17%), Bulimulus (Bulimulus) vesicalis angustus Weyrauch, 1966 (05 specimens = 0,3%) and Megalobulimus abbreviatus (Bequaert, 1948) (02 specimens = 0,11 %), only the last two being natives.

Resumo em Inglês:

Ceresa amazonica sp. nov. from Reserva Ducke, Manaus, Amazonas, Brasil, C. calosa sp. nov. from Curitiba, Paraná, Brasil, C. denticulata sp. nov. from Valle Chanchamayo, Junín, Peru) and C. remeslenicovae sp. nov. (from Piracicaba, São Paulo, Brasil) are described and illustrated.

Resumo em Inglês:

Anphira guianensis sp. nov. (Isopoda, Cymothoidae) is described from the branchial cavity of a freshwater fish, Acnodon oligacanthus Eigenmann, 1903 from French Guiana. The new species differs from the other known species of the genus in a number of important respects. Adult females are less convex than those of the other two known species and the mouth points downward. The coxal plates are largest posteriorly, unlike those of the other species. The antennule is much stouter and longer than the antenna whereas in the other species these appendages are subequal. Additionally, the dactyls of the new species are much longer.

Resumo em Inglês:

Macrobrachium acanthurus Wiegmann, 1836 is a Palaemonidae commonly found in Brazilian coastal environments. At Imboassica lagoon, located in the north of the State of Rio de Janeiro, it is found in two stages of its life cycle: as larvae and as reproductive adults. This work had as its goal the evaluation of adults distribution, estimating the weight/length relationship and the condition factor of these adults. After sampling in two regions of the lagoon, one interior and another closer to the ocean, we verified that females are found in a greater proportion close to the ocean, and males are found in greater number in the innermost region, amidst the aquatic macrophytes, suggesting that the fecundation takes place in this last area and the females then travel to the area closer to the ocean to spawn. Total and carapace weight/length relationship exhibited differences between males and females, presenting positive allometric growth. The relative growth of the cephalotorax related to total length showed that it correspond to 53% of the total length in females, and 50% in males. The average condition factor was significantly lower than the expected pattern, demonstrating that the species does not find ideal conditions in the lagoon. This may be attributed to the migration of the adults, to the spawning and/or to the impact caused by the frequent sandbar openings that took place at Imboassica lagoon during the studied period.

Resumo em Inglês:

The objective of this work is to get knowledge about the "guaiamum" crabs reproduction. Two hundred and twenty four crabs were caught from August'96 to July'97. Their sex carapace color and morphometric data were obtained. The stages of gonadal development were macroscopically determined and the eggs diameter was measured. Three colors patters for the carapace for males, and four patters for females. Five stages of gonadal development were observed in female crabs, and two stages were observed for males. The first sexual maturity was estimated 53,0 mm carapace width for the females and 52,0 mm for the males. The ovigerous females occurred from March to May. The individual fecundity varied from 103.300 to 366.400 eggs. The eggs mean diameter was 0,39 mm.

Resumo em Inglês:

Herein, the puparium of Sargus thoracicus Macquart, 1834 collected in decaying organic material, on the Campus of Universidade Federal Rural do Rio de Janeiro, Seropedica, Rio de Janeiro State is described. The description is based on a single larva collected and reared in laboratory till the emergence of the adult. Some biological notes on the larva are also presented.

Resumo em Inglês:

This paper deals with the schooling structure of Brazilian-sardine, Sardinella brasiliensis (Steindachner, 1879), in coastal waters of Rio de Janeiro State (Brazil). Samples were obtained from schools caught by commercial fishery in the area of Angra dos Reis (23º-24ºS, 44º-45ºW), from autumn/1999 to summer/2000, comprising 2,278 fishes. In average, males had total lengths and weights lower than those of females, with major differences in weights. Seasonal fluctuations of average total weights are associated with the annual reproduction cycle and condition factor, mainly in females. Sex-ratio was around 1:1, except in winter, when females were in majority. Mature males and females were found all along the year, with a peak in the spring-summer, showing a long reproduction period of successive spawning of reproducers in a same school, since individual spawning is complete. Total lengths when 50% of fishes are mature differ between males (18.2 cm) and females (19.2 cm). The schools can be considered as spawning schools, as they were found in a spawning ground, and consisted almost exclusively of adults, with a long annual reproduction period.

Resumo em Inglês:

The genus Cyclopeplus Thomson, 1860 is revised. New synonyms proposed: C. violaceus Lane, 1957 = C. peruvianas Tippmann, 1939 and C. germaini Gounelle, 1906 = C. lacordairei Thomson, 1868. The five species of Cyclopeplus are keyed, redescribed and illustrated.

Resumo em Inglês:

The genus Gounellea Lane, 1964 is revised and new synonyms proposed, G. zikani (Melzer, 1932) = G. Melzeri (Franz, 1935) = G. Franzae Lane, 1970 = G. bruchi (Gounelle, 1906). The species of Gounellea are keyed, redescribed and illustrated.

Resumo em Inglês:

A survey of chiropteran fauna was conducted during the period from March 1994 to May 1998 in Pedra Branca State Park, Rio de Janeiro, Rio de Janeiro State. A total of 681 specimens of 24 species were recorded: Chrotopterus auritus (Peters, 1856); Micronycteris megalotis (Gray, 1842); Micronycteris minuta (Gervais, 1856); Mimmon bennettii (Gray, 1838); Phyllostomus hastatus (Pallas, 1767); Tonatia bidens (Von Spix, 1823); Lonchophylla bokermanni Sazima, Vizotto & Taddei, 1978; Lonchophylla mordax Thomas, 1903; Anoura caudifera (E. Geoffroy, 1818); Glosso-phaga soricina (Pallas, 1766); Carollia perspicillata (Linnaeus, 1758); Artibeus fimbriatus Gray, 1838; Artibeus lituratus (Olfers, 1818); Artibeus obscuras Schinz, 1821; Chiroderma doriae Thomas, 1891; Platyrrhinus lineatus (E. Geoffroy, 1810); Platyrrhinus recifinus (Thomas, 1901); Sturnira lilium (E. Geoffroy, 1810); Vampyressa pusilla (Wagner, 1843); Desmodus rotundus (E. Geoffroy, 1810); Diphylla ecaudata Von Spix, 1823; Eptesicus brasiliensis (DesMarest, 1819); Myotis nigricans (Schinz, 1821) and Molossus molossus (Palas, 1766). One external (forearm length) and 13 cranial meansurements were studied for 23 species. The meansurements of male and female specimens were treated separately. Comments about some taxonomic respects for some species studied are also included.

Resumo em Inglês:

Dolops carvalhoi Lemos de Castro, 1949 was found infesting fish in a fish culture station located in highway AM-010 Manaus-ltacoatiara in the State of Amazonas. Egg laying of D. carvalhoi was studied. Hatching started after 16 days in a temperature span of 26 to 28ºC. Eggs were laid in clusters on hard substrata and covered by a gelatinous material. The number of eggs was 16 to 392 eggs by laying. In the postembryonic development the larvae were hatched from the egg as juveniles (epimorphic development), very similar to the adult shape.

Resumo em Inglês:

The following new species are presented: Anthodioctes rosanae sp. nov. and Anthodioctes ayalai sp. nov. from México and Anthodioctes misiutae sp. nov. from Brazil. The male of Moureanthidium bahianum Urban, 1995 and the female of Ananthidium dilmae Urban, 1990 are described by the first time. Notes and new occurrences of Anthodioctes lunatus (Smith, 1854) are given.

Resumo em Inglês:

Centris (Ptilocentris) danunciae sp. nov. (Peru, Huanta) and Centris (Melacentris) bitaeniata sp. nov. (Peru, Iquitos) are described. Some taxonomic notes are also given for Centris (Melacentris) dorsata Lepeletier, 1841 (= Centris ehrhardti Schrottky, 1902, syn. nov. = Centris dorsata var. maculosa Friese, 1924, syn. nov.) and Centris (Melacentris) collaris Lepeletier, 1841 (= Centris pocograndensis Schrottky, 1902, syn. nov.), species forgotten since their description.

Resumo em Inglês:

The objective of this work has to get knowledge about the reproductive aspect of the tree crab Aratus pisonii (H. Milne Edwards, 1837). The sampling were made monthly from April, 2000 to April, 2001, in the Itacurucá's mangrove (22º54'S and 43º33'W), Rio de Janeiro. The crabs were collected handly, using an effort of 50 minutes with three collectors. In laboratory, the specimens were separated by sex and had measured the carapace width and lenght. The ovigerous females were separated and the mass of eggs was removed for a mensurament of size and count of eggs. Afterwards, the animals were conservad in 70% alcohol. A total of 783 individuals were caught among 59% males and 41% females among these 8% were ovigerous. The ovigerous females were found almost during the whole year, except in the winter showing major plenty on February and March, demonstrating the reproductive period. The ovigerous females presented size between 14.0 and 23.6 mm of carapace width and the average fecundity estimated to the specie was 9081 ± 3684 eggs. The mean size of the eggs was 0.27 mm varied from 0.24 to 0.29 mm and the size at onset of egg production was verified from 13.1 to 15.0 mm of the carapace width.

Resumo em Inglês:

This work aims to determinate the spatial distribution of two sympatric freshwater shrimp species, Potimirim glabra (Kingsley, 1878) and Potimirim potimirim (Müller, 1881) in Sahy River, municipality of Mangaratiba. The populations were collected from September, 1997 to February, 1999. The animals were collected monthly by sieving the marginal vegetation, on rocky surface and among litter on river bottom. The animals were sorted sexed. Their carapace length measured and total length measured. A total of 4,889 animals were collected in Sahy River: 3,281 P. glabra and 1,608 P. potimirim. The spatial distribution of P. glabra and P. potimirim showed an environmental partition. Potimirim glabra occurred in abundance at the farthest stations from the beach, wilst and P. potimirim, at the nearest stations from the sea.

Resumo em Inglês:

Two new species of Psychodidae, Brunettia soteropolitana sp. nov. and Brunettia itabunensis sp. nov. from Bahia, northeast of Brazil are described.

Resumo em Inglês:

The Parsimony Analysis of Endemicity (PAE) consists in an important tool of the historical biogeography which has the purpose of detecting distribution patterns of organisms and the relationships among areas of endemism. Insect distribution data included in Membracidae-Hoplophorionini occurring in the American Continent were used in the present research in order to establish the relationships among eight predetermined areas of endemism which are: 1) Mexico, 2) Greater Antilles, 3) Central America, 4) North Andes, 5) Central Andes, 6) South Andes, 7) Amazon, e 8) South East Brazil. The data matrix was based on the presence (coded as 1) and abscence (0) of taxa in the areas. The analysis was performed with the use of computer program Hennig86 (Farris 1988) applying the comands ie (implicit enumeration), and xs w (successive weighting). Resulted in the cladogram (A2,((A6,(A1 ,(A3,(A4,A5)))),(A7,A8))) with 236 steps, consistency index = 0.94 and retention index = 0.86. Areas 7 and 8 follow a subtropical and tropical vegetation pattern made up respectively by pluvial forests and groves. The remaining areas (except 2) agree with mountainous vegetation of the Andes pattern and groves throughout the extention.

Resumo em Inglês:

Riggia acuticaudata sp. nov. is described on the basis of 10 female specimens recovered from the body cavity of the freshwater catfish, Ancistrus sp. The fish were caught in a stream called the Corrego Piraputanga, a tributary of the Paraguai River. The new species differs from the others in the genus by being smaller and less convex and by having a pleotelson that tapers abruptly rather than being the same width throughout. Also, the pereopods and dactyls are much smaller, the maxillule has two terminal and three subterminal spines and the first two pleopods are elongate and acute. Additionally, R. acuticaudata sp. nov. is from a different Order of fish host and a new geographic area.

Resumo em Inglês:

The remaining portion of the Atlantic Forest within the State of Sao Paulo is highly fragmented and most of the remainders are wrapped up in an essentially agricultural mosaic. This study aims at the local surveying of non-volant mammals, including their distribution and relative abundance within the human-altered environments of campus "Luiz de Queiroz", University of Sao Paulo, Piracicaba, São Paulo State, Brazil, an urbanized area bordered by two highways and the Piracicaba River. The landscape of the study area is characterized by a mosaic of small forest fragments surrounded by pastures, agriculture, and planted forests. Small mammals were captured from February to October, 2001, with an effort of 7056 day-traps, sampling the most representative environments of the campus: planted Eucalyptus (L'Héritier) and Pinus (Shaw) forests, native forest fragment, meadow, rubber tree (Hevea sp.) plantation, agriculture and pasture area. Occurrence of medium and large frame mammals was recorded daily (morning and afternoon) from November of 2000 to October of 2001 along a trail set up to merge the studied environments. Sixteen species of non-volant mammals were recorded, ten of medium or big body-size, and six of small body-size. Capybara (Hydrochaeris hydrochaeris (Linnaeus, 1766)) and coati (Nasua nasua (Linnaeus, 1766)) were the most abundant species.

Resumo em Inglês:

Imposex, the development of male sex organs on the female, is registered and described for Olivancillaria vesica vesica (Gmelin, 1791) at Restinga da Marambaia beach, Rio de Janeiro state, Brazil.

Resumo em Inglês:

This paper reports the occurrence of diapause in Tenuipalponychus tabebuiae Aguilar, Flechtmann & Ochoa, 1991, for the first time in tropical region, and describes the morphological differences between the diapausing and no-diapausing females.