Jefferson S. Mikalauskas

Distributions of the endocrine cells in the gastrointestinal tract of nectarivorous and sanguivorous bats: A comparative immunocytochemical study

The present study was conducted to clarify the influence of feeding habits on regional distribution and relative frequency of endocrine cells secreting cholecystokinin (CCK), gastrin (GAS), serotonin (5-HT) and enteroglucagon (GLUC) in the nectarivorous Anoura geoffroyi and Glossophaga soricina and the sanguivorous Desmodus rotundus bats of the Phyllostomidae family, by specific immunohistochemical methods. The regional distribution and frequency of the different types of endocrine cells varied according to their location in the GIT. 5-HT immunoreactive cells (IR), detected throughout the GIT of three bats, were the most predominant gastrointestinal endocrine cells. GAS-IR cells in A. geoffroyi were found at the base of the pyloric gland, while in G. soricina they could also be observed in the middle to basal portions of the gland. GLUC-IR cells were located in the fundic region of A. geoffroyi, G. soricina and D. rotundus. These endocrine cells were more abundant in the sanguivorous bat. In nectarivorous bats were compared to sanguivorous bat, which differ in dietary habits, difference in the distribution and relative frequency of gut endocrine cells would be predicted. The absence of some, and decrease in frequency of other, gastrointestinal endocrine cells may reflect, in part, its interspecies differences or dietary habits.

First records of mormoopid bats (Chiroptera, Mormoopidae) from the Brazilian Atlantic Forest

No abstract available

Immunocytochemical study of gastrintestinal endocrine cells in insectivorous bats (Mammalia: Chiroptera)

The regional distribution and relative frequency of endocrine cells in the stomach and intestine of Phyllostomidae: Lonchorhina aurita and Molossidae: Molossus molossus bats were studied immunohistochemically. Three types of immunoreactive (IR) endocrine cells--to serotonin (5-HT), gastrin (GAS) and enteroglucagon (GLUC)--were found in the gastric mucosa and four types of IR cells were identified in the intestinal mucosa. This study showed an interespecfic difference in the regional distribution and relative frequency of endocrine cells in the Chiropteran alimentary tract.

Ocorrência de Chiroderma doriae Thomas (Chiroptera, Phyllostomidae) no Estado de Sergipe, Brasil

O registro de Chiroderma doriae Thomas, 1891 no nordeste do Brasil e aqui relatado baseado em um especime macho adulto coletado durante inventario da quiropterofauna da Estacao Ecologica Serra de Itabaiana, Estado de Sergipe.

An update on the distribution of the Brazilian Funnel-eared Bat, Natalus macrourus (Gervais, 1856) (Mammalia, Chiroptera), with new records from the Brazilian Northeastern

We present data on the geographic distribution, morphology, and biology of the Brazilian funnel-eared bat, Natalus (Gervais, 1856), with new records for the Brazilian state of Sergipe, filling a gap of approximately 800 km in the distribution of the species in Brazilian Northeast.

Mammalia, Chiroptera, Vespertilionidae Rhogeessa hussoni Genoways and Baker, 1996: first record for the state of Sergipe, northeastern Brazil

The occurrence of Rhogeessa hussoni Genoways and Baker, 1996 in the state of Sergipe is reported here based on an adult female collected in mist nets during a chiropteran survey of the Refugio da Vida Silvestre Mata do Junco (RVS-Mata do Junco), a 894 ha fragment of lowland Atlantic Forest. Measurements and taxonomic comments about this species are given. Despite the variability found in coloration of the ventral pelage, qualitative and quantitative characters allowed the identification of the specimen as R. hussoni . The present record increases to twenty-eight the number of bat species recorded for Sergipe and confirms the presence of R. hussoni in the Atlantic Forest biome.

Update on the distribution of Peropteryx leucoptera Peters, 1867 (Mammalia, Chiroptera, Emballonuridae): First record for the state of Sergipe, northeastern Brazil

Three female specimens of Peropteryx leucoptera were collected in the Refugio da Vida Silvestre Mata do Junco, a fragment of Atlantic Forest located in the state of Sergipe, northeastern Brazil. These specimens represent the first record of the species for Sergipe, increasing to 44 the number of bat species recorded in this state. A summary of locality records for P. leucoptera indicates a disjunct distributional pattern for this species, with the majority of the records concentrated in the northern South America and a separate population in the Atlantic Forest of northeastern Brazil.