Taxonomy and distribution of aquatic and semiaquatic Heteroptera (Insecta) from Cuba

Heteroptera is a worldwide distributed group of insects inhabiting both terrestrial and aquatic habitats and has an important ecological role. A survey of aquatic and semiaquatic Heteroptera from Cuba is provided based on literature reports and field collections. General data on species geographical distribution are given, along with altitude and collection season. Representatives of 86 species and morphospecies of the infraorders Dipsocoromorpha, Leptopodomorpha, Gerromorpha and Nepomorpha are listed, distributed in 35 genera and 16 families were found. Based on distributional data, a preference for habitats of stagnant water or slow current and lower altitudes is inferred. Fifteen species are distributed throughout the entire island. A higher species diversity was found in the Eastern sector, with 53 species (61.63%), 16 of which (18.60%) are confined to this area. The strongest biological similarity was found between Eastern and Western sectors (25%), and the weakest between Western and Central sectors (14%). Rev. Biol. Trop. 58 (3): 897-907. Epub 2010 September 01.

Heteroptera es un grupo de insectos que se distribuyen en todo el mundo, viven en ambientes terrestres y acuáticos, en los que tienen un papel ecológico muy importante. Mediante la literatura y colecciones en el campo se estudiaron los Heterópteros acuáticos y semiacuáticos de Cuba, junto con datos sobre la distribución geográfica de las especies, altitud y estaciones de colecta. Se enumeran representantes de 86 especies y morfospecies de los infraórdenes Dipsocoromorpha, Leptopodomorpha, Gerromorpha y Nepomorpha, con un total de 35 géneros y 16 familias. Los datos de distribución muestran una preferencia por los ambientes de aguas lentas o estancadas y áreas de baja altitud. Quince especies se distribuyen en toda la isla; el sector Oriental es el mejor representado, con 53 especies (61.63%), 16 de ellas (18.60%) confinadas a este sector. La similitud biológica más fuerte se encontró entre los sectores oriental y occidental (25%) y la más débil entre los sectores occidental y central (14%).

Duas novas espécies de Belostoma Latreille, 1807 (Hemiptera: Heteroptera: Belostomatidae) do grupo plebejum sensu Nieser, 1975 / Two new species of Belostoma Latreille, 1807 (Hemiptera: Heteroptera: Belostomatidae) of plebejum group sensu Nieser, 1975

Representantes do grupo plebejum são encontrados de Honduras até o sul da América do Sul e compreendem sete espécies de pequeno porte. Como resultado de um estudo de revisão do grupo, são descritas duas espécies novas: Belostoma estevezae Ribeiro & Alecrim, sp. nov., do Estado do Mato Grosso, Brasil, similar a B. nicaeum Estévez & Polhemus, 2007, em termos de carena prosternal, e B. nessimiani Ribeiro & Alecrim, sp. nov., do Estado do Amazonas, Brasil, sendo bastante similar a B. parvum Estévez & Polhemus, 2007, em termos de genitália masculina. Uma chave de identificação para as espécies do grupo plebejum com as espécies novas incluídas é fornecida.

Species of plebejum group comprises seven extant small species of giant water bugs. This group is currently reported from Honduras to southern South America. Two new species are described as a result from a revisional study of this group: Belostoma estevezae Ribeiro & Alecrim, sp. nov., from Mato Grosso State, Brazil, and B. nessimiani Ribeiro & Alecrim, sp. nov., from Amazonas State, Brazil. The prosternal keel of B. estevezae, sp. nov., is similar to that of B. nicaeum Estévez & Polhemus, 2007, while the male genitalia structures of B. nessimiani, sp. nov., is similar to those of B. parvum Estévez & Polhemus, 2007. A key to the species of plebejum group with new species included is also provided.