Novos táxons de Lamiinae (Coleoptera, Cerambycidae) da América do Sul

Novos táxons descritos: Acanthoderini, Nesozineus osorioensis sp. nov., do Brasil (Rio Grande do Sul); Calliini, Drycothaea clara sp. nov., do Brasil (Rondônia) e Drycothaea hovorei sp. nov., do Equador (Napo); Forsteriini, Itacolomi gen. nov., espécie-tipo I. letiziae sp. nov., do Brasil (Minas Gerais); Yapyguara gen. nov., espécie-tipo Y. fusca sp. nov., da Bolívia (Santa Cruz); Xenofreini, Xenofrea zischkai sp. nov., do Equador (Napo) e da Bolívia (Santa Cruz).

Nova espécie do gênero Galissus Dupont (Coleoptera, Cerambycidae) e chave para identificação das espécies

Galissus nigrescens sp. nov. é descrita da Costa Rica (Veragua Rainforest Reserve, Brisas de Veragua, Liverpool, Limón) e é fornecida chave para identificação das espécies.

Duas espécies de Onciderini (Cerambycidae, Lamiinae) do Institut Royal des Sciences Naturelles de Belgique, Bruxelas

Hypsioma brabanti sp. nov. de Trinidad and Tobagoé descrita e ilustrada. Novo registro (Trinidad and Tobago) para Leus ramuli (Bates, 1865) é apresentado.

Novos táxons e notas sobre Cerambycidae (Coleoptera) da Costa Rica

Nova espécie descrita: Eupogonius intonsus sp. nov. de Guanacaste. Nova subespécie descrita: Eburia lanigera costaricensis subsp. nov. de Guanacaste. Novos registros: Cymatonycha meridionalis Martins & Galileo, 1995 (Puntarenas) e Nesozineus triviale Galileo & Martins, 1996 (Guanacaste). É comentada a variabilidade no colorido elitral de Eburodacrys havanensis Chevrolat, 1862.

Relationships of photosynthetic photon flux density, air temperature and humidity with tomato leaf diffusive conductance and temperature

The objective was to study the leaf temperature (LT) and leaf diffusive vapor conductance (gs) responses to temperature, humidity and incident flux density of photosynthetically active photons (PPFD) of tomato plants grown without water restriction in a plastic greenhouse in Santa Maria, RS, Brazil. The plants were grown in substrate and irrigated daily. The gs was measured using a steady-state null-balance porometer on the abaxial face of the leaves during the daytime. Both leaf surfaces were measured in one day. The PPFD and LT were measured using the porometer. Leaf temperature was determined using an infrared thermometer, and air temperature and humidity were measured using a thermohygrograph. The leaves on the upper layer of the plants had higher gs than the lower layer. The relationship between the gs and PPFD was different for the two layers in the plants. A consistent relationship between the gs and atmospheric water demand was observed only in the lower layer. The LT tended to be lower than the air temperature. The mean value for the gs was 2.88 times higher on the abaxial than adaxial leaf surface.

Seven new species of Cerambycidae (Coleoptera) from South America with the proposal of three new genera

The following new species are described - Cerambycinae, Sydacini: Sydax flechtmanni sp. nov. from Brazil (São Paulo); Eburiini: Ebrodacrys biffipradorum sp. nov. from Brazil (Roraima); - Lamiinae, Pteropliini: Ataxia piauiensis sp. nov. from Brazil (Piuaí); Calliini: Amucallia carbonaria sp. nov. from French Guiana; A. citrina sp. nov. from Guiana. Also in Lamiinae, two new genera of Onciderini are proposed. Ubytyra gen. nov., type species U. tuberosa sp. nov. from Peru (Junin) e Japi gen. nov., type species J. duartei sp. nov., from Brazil (São Paulo); Ubytyra gen. nov. can be distinguished by the sides of prothorax with long central spine rounded at apex, and this new feature among Onciderini is discussed. Japi gen. nov., is characterized by a fringe of long hairs on the inner side of antennomere III, present only in species from North and Central America, and gender comparison of these species is done and discussed. In Hemilophini, Pseudotacocha gen. nov., type species P. magnifica sp. nov. from Peru (Cuzco), are described. The new genera can be distinguished by eyes well developed, elytra with two carinae and the apices outer with short spine; a comparison with related genera is done.

Segue 3: the youngest globular cluster in the outer halo

Deep Galileo (Telescopio Nazionale Galileo) B, V and I images of Segue 3, reaching V ∼ 25, reveal that it is the youngest globular cluster known so far in the Galaxy. A young age of 3.2 Gyr is found, differently from a previous estimate of 12 Gyr. It also appears to be moderately metal rich with [Fe/H] ∼ −0.8, rather than [Fe/H] ∼ −1.7, as previously suggested by Fadely et al. A main difference in the age derivation relative to Fadely et al. comes from the consideration of subgiant branch stars in the isochrone fitting. A deduced distance of d⊙ = 29.1 kpc is compatible with the outer halo location of other low luminosity globular clusters.