Synopsis of Acanthocerini (Hemiptera, Coreidae) from Argentina

Eight genera and 13 species of the tribe Acanthocerini are recorded in Argentina, i.e., Athaumastus haematicus (Stål), Athaumastus macer Brailovsky, Athaumastus subcarinatus (Stål), Athaumastus subterlineatus Bergroth, Beutelspacoris sanchezi Brailovsky, Beutelspacoris dilatata Casini, Camptischium clavipes (Fabricius), Crinocerus sanctus (Fabricius), Dersagrena flaviventris (Berg), Dersagrena lacerdae (Signoret), Dersagrena subfoveolata (Berg), Thlastocoris hernandezi Brailovsky and Zoreva dentipes Fabricius. Redescriptions are given for Athaumastus haematicus, Athaumastus subcarinatus and Dersagrena flaviventris with photographs of male and female genitalia of Dersagrena subfoveolata. Zoreva recorded from Argentina the first time. New locality records are given for Buenos Aires, Chaco, Formosa, Misiones, and Tucumán.Fil: Pall, José Luis María. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Coscarón, María del Carmen. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Entomología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Comportamiento osinorregulador de Macrobrachium tenellum y Macrobrachium acanthurus (Decapoda:Palaemonidae) en diferentes salinidades

Se hizo una comparación de las respuestas osmóticas entre langostinos adultos de Macrobrachium tenellum de las costas del Pacifico mexicano y M.acanthurus del Golfo de México. Los organismos se sometieron a cuatro diferentes tratamientos experimentales con cambios bruscos y graduales de salinidad. Ambas especies presentaron comportamientos osmóticos similares en salinidades de O a 20 %0, alcanzando sus puntos isosmóticos en 632 y 640 mOsrnlkg, respectivamente, después de los cuales M.tenellum resultó hipoconforme mientras que M. acanthurus se comportó como hiporregulador. Las máximas salinidades toleradas por estas especies fueron de 28 %0 para M. tenellum y de 25 %0 para M. acanthurus.The osmotic response of adult freshwater pmwn Macrobrachium tenellum from the Pacific coast of Mexico was compared with that of M. acanthurus from the Gulf of Mexieo. Tbey received four experimental treatments with gradual and abrupt changes oí salinity. 80th species showed a similar osmotic behaviour at O to 20 ppt, reacbing their isosmotic points at 632 and 640 mOsmlkg respective1y; beyond tbis point both are hiporegulators However, while M acanthurus regulate precisely at 632 mOsmlkg, the blood osmolarity of M .. tenellum will increase slowly beyond the isosmotic point. Tbe maximum salinities tolerated by thespecimens were 211' ppt for M. tenellum and 25 ppt for M. afanthurus

Biodiversity of the scentless plant bugs (Hemiptera: Rhopalidae) in southern South America

Figure 3. Distribution of Xenogenus Berg species in Argentina. Pale colour: known distributions; dark colour: new distributions. The number of known species for each province is provided, with an asterisk indicating the number of newly recorded species.Published as part of Melo, M.C. & Montemayor, S.I., 2015, Biodiversity of the scentless plant bugs (Hemiptera: Rhopalidae) in southern South America, pp. 163-200 in Journal of Natural History 50 on page 172, DOI: 10.1080/00222933.2015.1073810, http://zenodo.org/record/398325

Revisão do gênero Runibia (Heteroptera, Pentatomidae, Pentatomini) Revision of the genus Runibia (Heteroptera, Pentatomidae, Pentatomini)

<abstract language="eng">Runibia Stål, 1861 is redescribed, as well as the species R. dallasi Rider, 1998, R. decorata (Dallas, 1851), R. discoidea (Fabricius, 1787), R. euopta (Walker, 1867) and R. perspicua (Fabricius, 1798). A new species, R. caribeana, is described from Virgin Islands. Strachia alligata Walker, 1867, R. decorata var. alligata, and R. picturata Breddin, 1904 were considered junior synonyms of R. decorata. Lectotypes of R. dallasi, R. euopta and R. alligata were designated. Male and female genitalia for all species are described, except the phallus and ectodermal genital duct for R. dallasi. A key and a geographical distribution map are also provided