Thiago Mahlmann | Instituto Nacional de Pesquisas da Amazônia (original) (raw)

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Papers by Thiago Mahlmann

As abelhas da subtribo Euglossina encontram-se amplamente distribuídas na região Neotropical, sen... more As abelhas da subtribo Euglossina encontram-se amplamente distribuídas na região Neotropical, sendo mais diversificadas nas florestas úmidas. Objetivou-se realizar um levantamento das espécies desta subtribo em um fragmento de Mata Atlântica, um remanescente de brejo de altitude, localizado em uma região do Semiárido Brasileiro. O estudo foi conduzido no município de Portalegre, Rio Grande do Norte, entre os meses de fevereiro e agosto de 2015. A coleta de dados foi realizada mensalmente entre às 08h00 e 16h00, com a utilização de armadilhas contendo as essências eucaliptol, eugenol e vanilina. Foram coletados um total de 123 machos, distribuídos em quatro gêneros e seis espécies, sendo elas: Eufriesea danielis (43,09%), Euglossa melanotricha (25,20%), Euglossa cordata (15,45%), Eulaema nigrita (13,82%), Euglossa fimbriata (1,63%) e Exaerete dentata (0,81%). O intervalo entre 08h00 e 10h00 foi o de maior atividade, com 54,4% do total dos machos coletados. A comunidade de abelhas da região estudada apresentou maior preferência pelo eucaliptol, atraindo cinco espécies e 67 indivíduos (53,6%). A espécie Eufriesea danielis é reportada pela primeira vez para a região Nordeste do Brasil, enquanto que Exaerete dentata tem seu primeiro registro para o estado do Rio Grande do Norte. Abstract: The bees of the Euglossina subtribe are widely distributed in the Neotropical region, being more diversified in the humid forests. The purpose of this research was to carry out a survey of the species of this subtribe in a fragment of Atlantic Forest, a remnant of altitude swamp, located in a region of the Brazilian Semiarid. The study was conducted in the municipality of Portalegre, Rio Grande do Norte, between February and August 2015. Data collection was performed monthly between 08h00 and 16h00, using traps containing the eucalyptol, eugenol and vanillin essences. A total of 123 males, distributed in four genera and six species were collected, which are: Eufriesea danielis (43.09%), Euglossa melanotricha (25.20%), Euglossa cordata (15.45%), Eulaema nigrita (13.82%), Euglossa fimbriata (1.63%) and Exaerete dentata (0.81%). The interval between 8:00 a.m. and 10:00 was the most active, with 54.4% of the total collected males. The community of the bees studied region showed greater preference for eucalyptol, attracting five species and 67 individuals (53.6%). The species Eufriesea danielis is reported here the first time for the Northeast region of Brazil, while Exaerete dentata has its first record for the state of Rio Grande do Norte.

Males of some groups of bees have to find a place outside the nests to sleep, sometimes forming “... more Males of some groups of bees have to find a place outside the nests to sleep, sometimes
forming “male sleeping aggregations”. Here we report the first record of “dense” male
sleeping aggregation of two different genera of Eucerini bees observed in Bahia, Brazil.
We discuss the possible aim of this kind of aggregation as well the plant utilized on
aggregate.

A third species of the rare augochlorine bee genus Chlerogelloides Engel et al. (Halictinae, Augo... more A third species of the rare augochlorine bee genus Chlerogelloides Engel et al. (Halictinae, Augochlorini)
is described and figured. Chlerogelloides nexosa sp. n. is most similar to the type species, C. femoralis Engel
et al., in that both have modified midlegs in the males. The former, however, can be distinguished on
the basis of its terminalia, which in some respects more closely resembles those of C. simplex Engel and
Brooks. Brief comments on the secondary features of males and relationships of the genus are provided.
A key to the species of the genus is provided and floral records of Cordia nodosa Lam. (Boraginaceae) and
Gonzalagunia dicocca Cham. & Schltdl. (Rubiaceae) are noted.

The bee genus Chilicola Spinola (Xeromelissinae) is recorded from the State of Bahia, Brazil for ... more The bee genus Chilicola Spinola (Xeromelissinae) is recorded from the State of Bahia, Brazil for the first time,
based on a new species of the megalostigma group of the subgenus Hylaeosoma Ashmead. Chilicola (Hylaeosoma)
kevani sp. n. is described and figured from males collected in Wesceslau Guimarães, Bahia. The species
can be distinguished on the basis of coloration, size, integumental sculpturing, and structure of the hidden
metasomal sterna and genitalia. A revised key to the species of the megalostigma group is provided.

Biota …, Jan 1, 2009

Bees are dependent on flower nectar and pollen (main sources of protein and energy, respectively)... more Bees are dependent on flower nectar and pollen (main sources of protein and energy, respectively) and have an important economic and ecological role as pollinators, representing about 40 to 90% of phanerogams pollinators in several ecosystems. This work presents a description of bee species from Parque Municipal da Cachoeirinha in Iporá, Goiás state, Brazil. A total of 58 hours of capturing were performed on November and December 2004 and on March and May 2005. A total of 933 individuals were collected, distributed in one family, 16 tribes, 33 genera, and 62 species. Meliponini tribe presented the highest number of individuals and species. Most abundant species were Trigona chanchamayoensis (16.51%), Tetragona clavipes (14.79%) and Apis mellifera and Trigona recursa (12.33%). This work presents the first occurrence in Goiás state for six genera and 12 species.

Biota …, Jan 1, 2009