Checklist and updated distribution of Protoneuridae from Brazil

Protoneuridae are represented in the neotropics by 16 genera and 117 species, of which 64 species in 12 genera are known to occur in Brazil. Most of them are known only from the original descriptions or isolated records. During 2009 the Protoneuridae collection of MNRJ was revised; 2800 specimens were studied, belonging to 40 species in nine genera. As a result, the distribution of 25 species is extended, including 50 new records for several states and three new records for the country: Epipleoneura lamina Williamson, Protoneura woytkowskii Gloyd, and Psaironeura remissa (Calvert). The widest distributions are shown by Neoneura sylvatica Hagen in Selys, Epipleoneura venezuelensis Rácenis, and Epipleoneura metallica Rácenis, which are also recorded from the highest number of states: 11 and eight respectively.Additionally, the distribution of most species within previously recorded states is extended.Fil: Pessacq, Pablo. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Esquel. Departamento de Biología. Laboratorio de Investigaciones en Ecología y Sistemática Animal; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Santos, Tatiana Chrysostomo. Universidade Federal do Rio de Janeiro; BrasilFil: Costa, Janira Martins. Universidade Federal do Rio de Janeiro; Brasi

Description of the larva of Bromeliagrion rehni (Odonata: Coenagrionidae) with bionomic notes concerning its phytotelmic habitat in central Amazonas, Brazil

A larva de último estádio de Bromeliagrion rehni Garrison in De Marmels & Garrison, 2005 é descrita e ilustrada e informações bionômicas sobre seu hábitat são apresentadas. O estudo foi conduzido na Reserva Florestal Adolpho Ducke, localizada em Manaus, Amazonas, Brasil. Entre abril de 2003 e abril de 2005, foram realizadas 12 amostragens, seis no período chuvoso e seis no seco. Para cada amostragem, 12 bromélias de Guzmania brasiliensis Ule, 1907 (Bromeliaceae) foram analisadas, seis terrestres e seis epífitas, totalizando 144 amostras. Um total de 75 espécimes de B. rehni foi coletado. A relação entre a abundância das larvas e os parâmetros ambientais mensurados (volume (ml), pH, estação e estratificação) foi significativa (ANCOVA, F = 5,296, df = 130, p < 0,001). Larvas foram mais abundantes na estação chuvosa (p < 0,01) e o volume de água foi positivamente correlacionado com a abundância de B. rehni. A larva de B. rehni pode ser diferenciada da larva de B. fernandezianum, única espécie do gênero com larva descrita, pelo número de setas no premento e pelo padrão de coloração na região apical do fêmur. Pela primeira vez é reportada a associação dessa espécie com fitotelmata de Guzmania brasiliensis

Low‐temperature tolerance in coprophagic beetle species (Coleoptera: Scarabaeidae): implications for ecological services

1. Low temperatures affect insect functioning and population dynamics. Although temperate species cope with low temperatures better than their tropical counterparts, increasing temperature variability due to climate change exposes tropical species to frequent cold stress. For keystone insect species providing important ecosystem services, low-temperature tolerances, and behavioural responses remain unknown, hampering predictions under climate change. 2. The present study examined low-temperature physiology [critical thermal minima (CTmin) and chill coma recovery time (CCRT)] of six dung beetle species across three activity times: diurnal Allogymnopleurus indigaceous (Reiche) and Euoniticellus intermedius (Reiche); crepuscular Onthophagus alexis (Klug) and Onthophagus gazella (Fabricius), and; nocturnal Copris elephenor (Klug) and Scarabaeus zambezianus (Peringuey). Further, ecological service delivery (dung removal) was examined between diurnal and nocturnal species across the temperature regimes. 3. Nocturnal species had significantly greater cold tolerance than both crepuscular and diurnal species, while CCRT was significantly shortest in diurnal than both crepuscular and nocturnal species. Dung ball production between diurnal and nocturnal species interacted with temperature, with diurnal species producing significantly fewer balls at low temperatures, while nocturnal beetles were not significantly affected. In turn, nocturnal species produced significantly larger balls than the diurnal species across temperatures. Effects of temperature regime shifts were intertwined with the foraging ecology of individual species. 4. Future research should quantify species' functional responses toward different amounts of dung masses as stressful temperatures increase. 5. Results are significant for determination of species thermal ranges and predicting costs of low-temperature stress through reduced ecological services under shifting thermal environments