Migratory testis, spermatogenesis and reproductive cycle of the neotropical broad-eared bat Nyctinomops laticaudatus (Molossidae).

We describe for the first time the displacement mechanism of migratory testis in Nyctinomops laticaudatus, which is little known in bats, in addition to histological analysis of its gonads. Data on testis anatomy and activity were obtained from 20 males. Males had migratory testes as they are displaced in the inguinal canals between intra and external abdominal positions. The displacement mechanism consisted of a testis ligament composed mainly of smooth muscle tissue attached to the cranial pole of the testis. Since the epididymis is closely tied to the testis, both organs are displaced together, regardless of the individual reproductive condition. Males and females showed seasonal monoestry, with a short mating period at the beginning of the dry season. The occurrence of breeding males was inversely proportional to rain and air temperature. At the mid-dry season, when air temperatures are also lower, males showed testis regressing, remaining in a reproductive hiatus for several months (rest/recrudescence) until the beginning of in the next dry season. Pregnant females were captured at the end of the dry season, and the birth of the young occurred during the rainy season, a time of greater food availability. Thus, females coordinated their reproductive phases to a more favorable period of the year for their survival and that of the offspring. Males associated their spermatogenic activity to a time of no environmental nor physiological restriction related to low air temperature.

Confirmation of the presence of Nyctinomops laticaudatus (Chiroptera: Molossidae) in Southwestern Colombia

We confirm the presence of the bat Nyctinomops laticaudatus in southwestern Colombia, by the record of a colony of the species in the urban area of the town of Cartago municipality, Valle del Cauca department, at a 950 m elevation. This new record supports the distribution of the species in the geographic valley of the Cauca River and in southwestern Colombia, where it was previously regarded as hypothetical.(AU)

Confirmation of the presence of Nyctinomops laticaudatus (Chiroptera: Molossidae) in Southwestern Colombia

We confirm the presence of the bat Nyctinomops laticaudatus in southwestern Colombia, by the record of a colony of the species in the urban area of the town of Cartago municipality, Valle del Cauca department, at a 950 m elevation. This new record supports the distribution of the species in the geographic valley of the Cauca River and in southwestern Colombia, where it was previously regarded as hypothetical.

Bats of Buraco das Araras natural reserve, Southwestern Brazil / Morcegos da Reserva Natural Buraco das Araras, sudoeste do Brasil

The doline Buraco das Araras is a peculiar environment and important destiny for ecotourism in the Serra da Bodoquena region, Mato Grosso do Sul, Brazil. Here we describe the bat fauna of the doline and surrounding areas, and report its use as dayroost by the bat Nyctinomops laticaudatus. Bats were mist-netted during two field expeditions, in November 2007 and January 2008. We captured 153 individuals of 10 species, mainly N. laticaudatus (n = 90) and Artibeus planirostris (n = 28). This is the first record of N. laticaudatus in the Serra da Bodoquena region; it was captured only in January when leaving the doline in dense flocks at dusk. Phyllostomus hastatus, Micronycteris sanborni, and Molossops temminckii are also new records for the Serra da Bodoquena region. Three individuals - A. planirostris, Carollia perspicillata and Glossophaga soricina - tagged in November were recaptured in January, indicating that these species are residents. The doline and bordering vegetation appear to be important sources of shelter and food for bat fauna maintenance.

A dolina Buraco das Araras é um ambiente peculiar e importante destino para o ecoturismo na região da Serra da Bodoquena, Mato Grosso do Sul, Brasil. Descrevemos aqui a fauna de morcegos da dolina e entorno, e reportamos sua utilização como abrigo diurno pelo morcego Nyctinomops laticaudatus. Os morcegos foram capturados em redes de neblina durante duas expedições, em novembro de 2007 e janeiro de 2008. Capturamos 153 indivíduos de 10 espécies, principalmente N. laticaudatus (n = 90) e Artibeus planirostris (n = 28). Este é o primeiro registro de N. laticaudatus na região da Serra da Bodoquena; a espécie foi capturada apenas em janeiro quando indivíduos deixavam a dolina em denso agrupamento ao anoitecer. Phyllostomus hastatus, Micronycteris sanborni e Molossops temminckii também são novos registros para a região da Serra da Bodoquena. Três indivíduos - A. planirostris, Carollia perspicillata e Glossophaga soricina - marcados em novembro foram recapturados em janeiro, indicando que estas espécies podem ser residentes. A dolina e a vegetação de entorno parecem representar importantes fontes de abrigo e alimento para a manutenção da fauna de morcegos.

Ampliação da distribuição de quatro espécies de morcegos (Mammalia, Chiroptera) no Rio Grande do Sul, Brasil / Extension of the distribution of four bat species (Mammalia, Chiroptera) in Rio Grande do Sul, Brazil

Este estudo tem por objetivo registrar a ocorrência de quatro espécies de morcegos na região central do Estado do Rio Grande do Sul, sul do Brasil: Histiotus montanus, Pygoderma bilabiatum, Nyctinomops laticaudatus e Myotis ruber. Os dados foram obtidos a partir da coleção científica da Universidade Federal de Santa Maria (UFSM) e representam ampliações de distribuição para essas espécies no Estado. São fornecidas informações sobre o habitat onde as espécies foram coletadas, sendo que alguns desses são novos para essas espécies. Pode-se considerar que algumas das espécies enfocadas são raras no Rio Grande do Sul, ao passo que outras deveriam ter o seu grau de ameaça reconsiderado.

The objective of this paper is to record the occurrence of four bats species in the central of the Rio Grande do Sul State, south of Brazil: Histiotus montanus, Pygoderma bilabiatum, Nyctinomops laticaudatus and Myotis ruber. Data were obtained from the scientific collection of Universidade Federal de Santa Maria (UFSM) and represent distribution extensions for these bat species in this State. We present information on the habitat where the species were collected, showing that some of them are new for this species. Some of the studied species may be considered rare in the Rio Grande do Sul State, whereas others should have their degree of threat revaluated.

Primeiro registro de Rhynchopsyllus pulex (Siphonaptera: Tungidae) em Nyctinomops laticaudatus (Chiroptera: Molossidae) no Brasil

The parasitism of Rhynchopsyllus pulex (Siphonaptera: Tungidae) is described in Nyctinomops laticaudatus (Chiroptera) in the county of Santa Maria, Rio Grande do Sul, Brazil.

Descreve-se o parasitismo de Rhynchopsyllus pulex (Siphonaptera: Tungidae) em Nyctinomops laticaudatus (Chiroptera) no município de Santa Maria, Rio Grande do Sul, Brasil.

Primeiro registro de Rhynchopsyllus pulex (Siphonaptera: Tungidae) em Nyctinomops laticaudatus (Chiroptera: Molossidae) no Brasil

The parasitism of Rhynchopsyllus pulex (Siphonaptera: Tungidae) is described in Nyctinomops laticaudatus (Chiroptera) in the county of Santa Maria, Rio Grande do Sul, Brazil.

Descreve-se o parasitismo de Rhynchopsyllus pulex (Siphonaptera: Tungidae) em Nyctinomops laticaudatus (Chiroptera) no município de Santa Maria, Rio Grande do Sul, Brasil.