Revisión sistemática de Mesolecanium Cockerell de la región Neotropical (Hemiptera: Coccidae), con sinonimia y combinaciones nuevas

Redescriptions and illustrations of 14 neotropical species included in Mesolecanium Cockerell are given. Eight species: Mesolecanium baccharidis (Cockerell), Mesolecanium impar (Cockerell), Mesolecanium mayteni Hempel, Mesolecanium nocturnum (Cockerell and Parrott), Mesolecanium obscurum (Hempel), Mesolecanium obvius Granara de Willink, Mesolecanium perditum (Cockerell), and Mesolecanium planum Hempel, belong to this genus; a key to separate the species is given. Five species are transferred: Mesolecanium campomanesiae Hempel and Mesolecanium pseudosemen Cockerell are moved to Magnococcus Granara de Willink becoming Magnococcus campomanesiae (Hempel) new combination, and Magnococcus pseudosemen (Cockerell) new combination. Mesolecanium jaboticabae Hempel is moved to Parthenolecanium Šulc becoming Parthenolecanium jaboticabae (Hempel) new combination, Mesolecanium batatae Cockerell to Pulvinaria Targioni Tozzetti becoming Pulvinaria batatae (Cockerell) new combination, and Mesolecanium ferum Hempel to Toumeyella Cockerell becoming Toumeyella ferum (Hempel) new combination. Mesolecanium uvicola Hempel is a new synonym of Coccus longulus Cockerell. Lectotypes for Mesolecanium impar (Cockerell) and Mesolecanium planum Hempel are designated.Se redescriben e ilustran 14 especies neotropicales incluidas en Mesolecanium Cockerell (Hemiptera: Coccidae). Ocho especies: Mesolecanium baccharidis (Cockerell), Mesolecanium impar (Cockerell), Mesolecanium mayteni (Hempel), Mesolecanium nocturnum (Cockerell y Parrott), Mesolecanium obscurum Hempel, Mesolecanium obvius Granara de Willink, Mesolecanium perditum (Cockerell), Mesolecanium planum Hempel, pertenecen a este género, las cuales se incluyen en una clave para separar las mismas. Cinco especies son transferidas: Mesolecanium campomanesiae (Hempel) y Mesolecanium pseudosemen (Cockerell), se transfieren a Magnococcus Granara de Willink como Magnococcus campomanesiae (Hempel) comb. nov. Magnococcus pseudosemen (Cockerell) comb. nov. respectivamente; Mesolecanium jaboticabae (Hempel) se transfiere a Parthenolecanium Šulc, como Parthenolecanium jaboticabae (Hempel) comb. nov.; Mesolecanium batatae (Cockerell) a Pulvinaria Targioni Tozzetti como, Pulvinaria batatae (Cockerell) comb. nov. y Mesolecanium ferum Hempel a Toumeyella Cockerell como Toumeyella ferum (Hempel) comb. nov. Se sinonimisa a Mesolecanium uvicola Hempel con Coccus longulus (Douglas). Se designan los lectotipos de Mesolecanium impar (Cockerell) y Mesolecanium planum Hempel

Una nueva especie de Ferrisia Fullaway en la Republica Argentina. (Homoptera: Pseudococcidae)

Ferrisia multiformis sp. n. is described from Argentina, on Parthenium sp. A key is given to separate it from virgata and meridionalis also present in Argentina

El genero \u3ci\u3eCerococcus\u3c/i\u3e en la Argentina (Homoptera: Cerococcidae)

The new species Cerococcus lizeri is described; new geographical distribution for C. catenarius and new hosts for C. badius are given. A key with the 5 species from Argentina is here provided

Una nueva especie de \u3ci\u3eTrionymus\u3c/i\u3e de Argentina (Hemiptera: Pseudococcidae)

Resumen: Se describe e ilustra una nueva especie del género Trionymus Berg (1899); se cita a T. coronus Miller y McKenzie para la Argentina y se brinda una nueva clave de las especies para la Región Neotropical. Abstract: A new species of Trionymus Berg, T. austrinus Willink, is described and illustrated from Argentina. Trionymus coronus Miller y McKenzie is recorded for the first time from Argentina, and a new key for the Neotropical species are given

Ant-tended hemiptera in Amazonian myrmecophytes: Patterns of abundance and implications for mutualism function (Hymenoptera: Formicidae)

We assessed how the abundance of ant-tended Hemiptera associated with two Amazonian myrmecophytes, Tococa bullifera and Maieta guianensis, varied as a function of resident ant species. We collected five species or morpho-species of adult hemiptera in the domatia of M. guianensis, with four of these species also found in Tococa bullifera. Maieta guianensis plants inhabited by Crematogaster laevis had over four-fold more hemiptera in them than plants inhabited by Pheidole minutula. In contrast, the density of hemiptera in Tococa bullifera domatia was independent of the species of ant resident. For each of the two ant species inhabiting Maieta guianensis, there was a positive and significant relationship between the abundance of hemiptera and workers inhabiting a plant. This relationship was also significant and positive for the Tococa bullifera plants inhabited by C. laevis. However, there was no relationship between Azteca worker and hemipteran density, although there was a trend towards a positive relationship. Our results indicate that hemipteran abundance can vary significantly between different myrmecophyte species, but that the nature of this relationship is mediated by the identity of the ant associate. Because hemipterans are herbivores, the costs and benefits of different ant partners to the host plant may vary in ways that are often overlooked

Aclerdidae (Hemiptera: Coccoidea) de la Argentina

Se describen e ilustran la hembra adulta, el primer estadio y un estadio intermedio de la hembra de Aclerda colihuensis sp. nov., encontrada sobre Chusquea culeou una Bambusaceae, de los bosques andinopatagónicos. Se brinda una clave para las especies de Aclerda Signoret, de la región Neotropical. Se cita esta familia por primera vez para la Argentina.<br>The female, the first stage, and intermediate female stages of Aclerda colihuensis n. sp., are described and illustrated. A key to the neotropical species for Aclerda Signoret is given. This is the first family report from Argentina. The new species was found on Chusquea culeou Desv. Bambusaceae, from the Patagonia forest

Una nueva especie de \u3ci\u3eFerrisia\u3c/i\u3e Fullaway en la República Argentina. (Homoptera: Pseudococcidae)

Ferrisia multiformis sp.n. is described from Argentina, on Parthenium sp. A key is given to separate it from virgata and meridionalis also present in Argentina