RCAAP Repository

The effect of area size, number of collecting hours and months surveyed, on the estimation of relative richness of bees is analized. In order to characterize a biogeographical region, it is suggested to collect various samples of no less than 400 especimens for each one, in contrasting localities within a region, utilizing the usual standardized methodology for wild bees collecting. Thus, it is possible to have a better profit of the effort invested in the survey, making it possible to estimate the relative species richness among different biogeographical regions, in shorter periods of time.

General histology of small intestine (duodenum and jejunum) and the large intestine (colon and cloaca) of C. c. yacare (Daudin, 1802) Crocodilia-Reptilia. A comparative description is made of the histology of the small and large intestine of C. c. yacare. In all segments mucosa, submucosa, muscularis and serosa tunics were observed. The duodenum as very long villi, wich are well-developed and attached together to form irregular transverse ridges, covered with simple columnar epithelium with marginal and goblet cells. In the jejunum, the villi are shorter and less frequent. The colon as few folds, covered with the same epithelium; the lamina própria contains straight tubular glands with absortive cells, goblet and Paneth cells. The cloaca is very complex, with three well-defined regions: coprodeum, urodeum and proctodeum. In the coprodeum, the wall is folded, less muscular and the thin mucosa is covered by an epithelium with a few basal cells and mucosal cells. The urodeum as an additional external muscular tunic, with striated muscle fibers and a stritifield cylindrical epithelium with goblet cells. The proctodeum includes the free part of the penis in the male and, laterally, the ducts of a pair of holocrine cloacal glands. Near the opening of the ducts, the epithelium changes to a squamous keratinized type.

No summary/description provided

Narope cyllene Felder & Felder, 1859 is revalidated and redescribed. Descriptions of the immature stages and presented.

New data on the biology and morphology of Tunga penetrans (L., 1758) Jarocki, 1838 (Siphonaptera-Tungidae) are presented. In this paper is given a comparision between those points found at the literature with the new ones which have been pointed out, such as different aspects of the larval structural, a particular description of the egg-breaker, and morphobgical details of adults obtained by using scanning electron microscope. New data about evolution period are given.

Velez, I. & V.E. Thatcher: Five species of Lecithodendriidae (Trematoda) in bats from Colombia, including three new genera. Three new neotropical genera and species of Lecithodendriidae (Trematoda) are described from Colombian bats. Sturniratrema umbilicata gen. et sp. nov. from Sturnira lilium differs from other genera in having an oval ventral depression, a dorso-ventrally curved cirrus and a genital pore lateral to the acetabulum. Chiropterotrema antioquiense gen. et sp. nov. from Carollia perspicillata is distinguished by having the acetabulum within a triangular ventral pit as well as an separation between the the male and female genital pores. Topsiturvitrema verticalia gen. et sp. nov. from Carollia perspicillata has a different orientation of the body, being nearly spherical but somewhat flatened in an anterior-posterior direction. This genus also has a deep ventral cleft separating two ventral lobes which are filled with eggs. Castroia silvai Travassos, 1928, is also reported from Anoura caudifer and Peropteryx macrotis. The first of these represents a new host record for the species. Addiotionally, Limatulum gastroides Macy, 1935, is reported from Lonchophyla robusta wich is another new host record.

Ecological studies including occurrence, relative abundance and spatial distribution of 15 species of Brachyura, as well as the fluctuation in the annual cycle are carried out in mangrove (27º 34' 14" and 27º 35' 31" L.S.; 48º 30' 07"and 48º 31' 33" L. W.), during the year 1986. The hydrological parameters temperature, salinity and pH of surface and intersticial waters were also studied. Chasmagnathus granulata was the most abundant specie, followed by Uça uruguayensis, Aratus pisonii and Callinectes danae. The number of males was higher than females. In the spring a larger rate of Catches occurred. The species Eurytium limosum, Cardisoma guanhumi that had the state of São Paulo as their austral boundaru and Uça maracoani the state of Paraná, have now their boundaries of distribution expanded is for as the City of Florianópolis, in the state of Santa Catarina.

The authors describe a new genus and two new species of Mirinae, Resthenini, as follows: Nanniresthenia minor n.sp., Argentina; N. golbachi n.sp., Argentina; Cephaloresthenia n. gen., C. oranensis (Carvalho & Carpintero), type; C. proluteiceps (Carvalho); C sanjavierus (Carvalho); C. alvarengai (Carvalho) are transferred to the new genus. Included notes and taxonomical corrections. Figures of habitus and male genitalia are given.

Four new species of Yungasia Linnavuori are described: Y. peruana (Peru), Y. lurida and Y. fulmina (Colombia), and Y. tricolor (Brazil).

The phrenic nerve of albino rats was studied for age changes in number of fibres, myelin sheath thickness and axon calibre. Nerves were excised from three young and three aged rats. There is no significant morphological differences between nerves from young and aged rats and no difference with age was found in the number of fibres, myelin sheath thickness and axon calibre.

In this paper the authors give an anatomical and histological analysis of the male reproductive system of Pomacea canaliculata (Lamarck, 1822). Anatomically, the testis is better evidentiated than the ovary. In the structure of the testis a great number of very small channels converges to a single one. The male copulatory organs result of transformations that take place in the inner surface on the palial membrane. Histologically, the testis of immature males shows seminiferous ducts with round egg-shaped forms. In their lumens we could notice masses of cells that will originate spermatozoids. The penis has a conjunctive muscular sheath that can be seen in van Gieson's coloured preparations.

A morphological study of the yolk nucleus in previtellogenic oocytes from A. bimacularus has been carried out. Six phases of development were described from its formation closed to the oocyte nucleus to its dispersion in the periferic ooplasm. Histochemical techniques indicate proteins, lipids and RNA in the yolk nucleus of A. bimaculatus, but there are no carbohydrate in this structure. The origin and functional activity of the teleost yolk nucleus are discussed.

Plagiometriona (Parametriona) palmeirensis sp.n. is described.

Seven nests of Melitoma segmentaria found in Uberlândia (18º 55' 23" S; 48º 17' 9" W; altitude 854 m) in a termite nest within one of the University of Uberlândia farms, were studied. The nest position, construction, and number of cells are given. The parasite Anthrax Iuctuosus (Bombylidae), that infested 13% of the cells.

Monthly sampling from march 1981 to april 1983 using beach seines, cast nets and gill nets indicated six species, Xenomelaniris brasiliensis, Brevoortia pectinata, Geophagus brasiliensis, Gerres aprion, Genidens genidens and Achirus lineatus, as the most abundant fishes in the Marependi Lagoon, Rio de Janeiro, BraziL The species presented a long reproductive period and the recruitment distributed throughout the year. Analysis of the mean catch per unit effort in relation to month, sampling areas, and environmental factors along with analysis of the length frequency distribution by depth strata indicated that the spatial distribution, related to depth and occurrence of submerged aquatic vegetation seem to be the main factors regulating the species distribution. Alteration of the environmental conditions in the lagoon due to the opening of the Marapendi channel in 1984 caused significative modification in the distribution and abundance patterns of the main species. The impact of these alterations in the Marapendi Lagoon fish community has yet to be determined.

No summary/description provided

In this paper the authors give a histological analysis of the albumen gland of mature and immature females of Pomacea canaliculata (Lamarck, 1822). In the immaturity, tthe gland doesn't show any secretory activity, although in the maturity this activity is indicated by the presence of a homogeneous and eosinophilic material in its lumen. We could notice in the capsule gland of matures females a calcareous element is present as a granular and basophilic deposit. The albumen gland is envolved by a thin conjunctive layer that can be seen in van Gieson's coloured preparations.

Two new brazilian species of Tunaima Fennah, 1968 are described: T. brunneoau-rantiaca sp.n. (from São Paulo and Paraná) and T. brunneolutea sp.n. (from Paraná and Rio Grande do Sul).

Wildlife surveys were conducted in two stands of Eucalyptus, one homogeneous and the other with a native species understorey in the Atlantic forest region of southeastern Brazil Deforestation has reduced the original forested habitat to a patchwork of cultivated fields and mono-specific forestry plantations. Wildlife communities were depauperate in the homogeneous stand, but richer in eucalypt forest with native species understorey. Small mammals, particularly didelphid marsupials, used the understorey rather than the eucalypt emergent trees Primates were absent from both areas. The increasing demand for charcoal for the growing steel industry in the region means that eucalypt plantations will persist until an alternative energy source is found. It is essential that management efforts be directed towards multi-use strategies in these plantations Eucalypt plantations with a native species understorey might provide sufficient habitat to support some wildlife species of the rapidly disappearing Atlantic coastal forest ecosystem.

The occurence of Gallilichus hiregoudari D'Souza e Jagannath in Gallus gallus (L.) is widespread in Brazil. All life stages of the mite can be found within the quills of primaries and secondaries of the flight feathers. Nymphal heteromorphism, imbalanced sex ratio toward females and thanatochresis are common features. Damage of the pulp caps and raquis are common pathological findings.