INTRODUCTION: This paper reports, for the first time, the presence of Rhodnius montenegrensis in the State of Acre, Brazil.METHODS: Two female R. montenegrensis were collected in a dwelling in the rural area of Rio Branco, Acre, Brazil.RESULTS: The occurrence of this species was confirmed, and the number of Triatominae species in the State of Acre increased from four to five.CONCLUSIONS: Further studies should be performed to reach a clearer understanding of the ecology of this arthropod, its possible role in transmitting Chagas' disease and rangeliosis, and its current geographical distribution in the region.

Maquira sclerophylla é uma árvore de interesse econômico madeireiro, encontrada na floresta de terra firme por toda a bacia Amazônica. Os objetivos deste trabalho foram estudar a morfologia do fruto, da semente e da plântula e observar o efeito de temperaturas constantes entre 10 e 35°C na germinação e formação de plântulas. Os frutos de M. sclerophylla são pseudodrupas globosas contendo uma grande semente também globosa, que representa cerca de 80% da massa fresca do fruto. A germinação é semi-hipogea e fanerocotiledonar, com cotilédones carnosos e viridiscentes. A emergência da radícula ocorreu nas temperaturas entre 15 e 35°C, porém, o desenvolvimento da plântula normal foi observado somente entre 20 e 30°C. Os resultados indicam 30°C como temperatura ótima para a germinação das sementes. Nesta condição, a emergência da radícula ocorreu após 18 dias, em média, e a formação da plântula com raiz primária, epicótilo e o primeiro par de folhas desenvolvidas, cerca de 37 dias após a semeadura.

Maquira sclerophylla is a timber tree found in "terra firme" (non flooded) forest throughout the Amazon basin. The objectives of this study were to improve the basic knowledge of fruit, seed and seedling morphology and to observe the effect of constant temperatures between 10 and 35°C on seed germination and seedling development. M. sclerophylla has globular pseudodrupes that contain one large globular seed of about 5.4 g (fresh weight), on average, 80% of the fruit's mass. Germination is semihypogeal and phanerocotylar with fleshy and verdant cotyledons. Radicle protrusion occurred between 15 and 35°C, but normal seedling development was only observed between 20 and 30°C. The results indicate that the optimum temperature for seed germination is 30°C. Radicle protrusion occurred at this temperature after 18 days. The primary root, epicotyl and the first pair of foliage leaves of the seedlings were developed 37 days after sowing.