RESUMO

A new tortoise beetle species, Cyrtonota abrili, is described from the Antioquia and Caldas departments in Colombia. New faunistic data are provided for 87 species, including 16 new additions to the country's fauna. A checklist of the known 238 species of tortoise beetles recorded from Colombia is given.

RESUMO

Emersonella Girault, 1916 is a wasp genus including species that parasitize Chrysomelidae (Coleoptera) eggs, mainly Cassidinae. It occurs only in the Americas, and is primarily distributed in the Neotropical Region. In this paper two new species of Emersonella from the Atlantic Forest of southeastern Brazil are described and compared to similar species. Emersonella appendigaster sp. nov. is characterized by an elongate last gastral tergite in female, thoracic dorsum flat, femora and tibiae yellowish in female, malar sulcus absent, frontal suture slightly down-curved laterally, eyes with scattered hairs, frons and vertex smooth, and propodeum smooth with small anteromedian foveae. Emersonella frieirocostai sp. nov. is characterized by an elongate gaster in the female, at most 1.3 times as long as mesosoma and pointed at apex, propodeum with two large anterolateral foveae, pronotum hardly visible in dorsal view, with posterior part smooth, transverse pronotal carina present and malar sulcus absent. Both species are egg parasitoids of Metriona elatior (Klug, 1820) (Chrysomelidae) which feeds on Solanum viarum Dunal (Solanaceae).

Assuntos

RESUMO

Emersonella Girault, 1916 is a wasp genus including species that parasitize Chrysomelidae (Coleoptera) eggs, mainly Cassidinae. It occurs only in the Americas, and is primarily distributed in the Neotropical Region. In this paper two new species of Emersonella from the Atlantic Forest of southeastern Brazil are described and compared to similar species. Emersonella appendigaster sp. nov. is characterized by an elongate last gastral tergite in female, thoracic dorsum flat, femora and tibiae yellowish in female, malar sulcus absent, frontal suture slightly down-curved laterally, eyes with scattered hairs, frons and vertex smooth, and propodeum smooth with small anteromedian foveae. Emersonella frieirocostai sp. nov. is characterized by an elongate gaster in the female, at most 1.3 times as long as mesosoma and pointed at apex, propodeum with two large anterolateral foveae, pronotum hardly visible in dorsal view, with posterior part smooth, transverse pronotal carina present and malar sulcus absent. Both species are egg parasitoids of Metriona elatior (Klug, 1820) (Chrysomelidae) which feeds on Solanum viarum Dunal (Solanaceae). (AU)

Assuntos

RESUMO

É apresentado um levantamento das espécies de Cassidinae que ocorrem no Parque Nacional do Itatiaia, Rio de Janeiro. O Parque Nacional do Itatiaia (PNI) é situado no Estado do Rio de Janeiro, Brasil e é uma das mais importantes Unidades de Conservação da Mata Atlântica. Pouco se sabe sobre as espécies de Coleoptera desse parque. Dois inventários de Cassidinae foram realizados previamente no Estado do Rio de Janeiro, totalizando 80 espécies para o PNI. O objetivo do trabalho é realizar uma atualização do inventário das espécies e fornecer uma chave de identificação para as tribos de Cassidinae que ocorrem no parque. Foram examinados exemplares da coleção do Museu Nacional, Universidade Federal do Rio de Janeiro e da Fundação Instituto Oswaldo Cruz. Em adição, foram realizadas coletas no período de setembro de 2007 a janeiro de 2010. Este estudo resultou em 88 espécies distribuídas em 29 gêneros e sete tribos. Dezenove apresentam novos registros de distribuição sendo que destes, oito são para o Estado do Rio de Janeiro, Parque Nacional do Itatiaia.

A survey of the Cassidinae species recorded to the Parque Nacional do Itatiaia, state of Rio de Janeiro, is presented. The Parque Nacional do Itatiaia (PNI), is situated in the state of Rio de Janeiro, Brazil and is one of the most important Mata Atlântica Conservation Unit. Little is known about the species of Coleoptera from this park. Two surveys concerning Cassidinae fauna of Rio de Janeiro were previously done, totaling 80 species recorded to PNI. The main goal of this study is to update the checklist of species as well as to provide an identification key of Cassidinae tribes that occur at the PNI. We examined specimens from the collection of Museu Nacional, Universidade Federal do Rio de Janeiro and Fundação Instituto Oswaldo Cruz. In addition, samples were done from september, 2007 to january, 2010.This study resulted in 88 species distributed in 29 genera and seven tribes. Nineteen species have now new records of distribution, eight of them for the state of Rio de Janeiro, Parque Nacional do Itatiaia.

RESUMO

Species richness and abundance of seven Plagiometriona species on their host plants were studied along a single trail in the mountainous Serra dos Órgãos National Park in the State of Rio de Janeiro, Brazil. Six sites were chosen along an altitudinal gradient ranging from 1300 m to 2050 m, where all Solanaceae host plants were inspected in search of adults every two months from June 2006 to June 2007. Species richness did not vary clearly with altitude, but abundance increased up to 1800 m, where the highest mean host plant density was found, and abruptly decreased at the last elevational site. Most species showed a restricted distribution and just one occurred across the entire gradient. For at least four species, altitudinal distribution seems to be strongly related to host plant availability, while for the others it is difficult to access which factors are decisive, due to their low numbers. Only in October all species were found in the field, although February was the month with the highest total abundance. Over the course of the study, the greatest abundances were recorded from October to February, comprehending the hottest and rainiest months, and the lowest abundances were found from June to August, which include the coldest and driest months. Thus, species seasonal distribution, supported by other studies in the same area, seems to be related to the local climate.

RESUMO

En el presente trabajo se presentan descripciones de la morfología externa del huevo, instares larvales y pupa de Calyptocephala gerstaeckeri Boheman, insecto plaga de la palma aceitera (Elaeis guineensis J.) y de la palma camedor (Chamaedorea elegans Mart.) en el estado de Tabasco, México. Además se aportan algunos datos acerca de la bionomía de esta especie, la cual fue criada en laboratorio sobre plantas jóvenes de palma aceitera.

Characters of the external morphology of egg, larval instars and pupae of Calyptocephala gerstaeckeri Boheman, insect pest of oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) in the State of Tabasco, Mexico, are described and illustrated. Some bionomics data are also presented. The specie was reared in the laboratory on young oil palm plants.

Assuntos

RESUMO

Plant trichomes can difficult the attachment and movement of small insects. Here, we examine the hypothesis that the success on the use of densely haired hosts by two cassidine species is determined by differential morphology and behavior. Larvae of Gratiana graminea (Klug, 1829) and Gratiana conformis (Boheman, 1854) move on the leaf surface of their host, Solanum guaraniticum Hassl by anchoring their tarsungulus on the trichome rays or by inserting the tarsungulus tip directly into epidermis. This kind of movement is only possible due to a similar tarsungulus shape among the species. Tarsungulus growth pattern is also similar between species, being relatively small on the posterior aperture, matching the diameter of the host plant trichome rays. The tarsungulus shape associated with differences on ontogenetic growth and attachment pattern allow these two Cassidinae larvae to efficiently move on the pubescent leaf surface of their host.

Os tricomas foliares podem dificultar a fixação e o movimento de pequenos insetos. Neste trabalho, testamos a hipótese de que o sucesso na exploração de plantas com folhas densamente cobertas por tricomas é determinado pela morfologia e comportamento diferenciados em duas espécies de cassidíneos. As larvas de Gratiana graminea (Klug, 1829) e Gratiana conformis (Boheman, 1854) se movem sobre a superfície foliar de sua hospedeira, Solanum guaraniticum Hassl através do ancoramento de seus tarsúngulos no raio dos tricomas estrelados da planta ou da inserção da ponta desta estrutura diretamente na epiderme. Tais tipos de movimento só são possíveis devido à forma dos tarsúngulos, a qual é similar nas duas espécies. O padrão de crescimento dos tarsúngulos das espécies estudadas é também similar e apresenta-se relativamente menor na abertura posterior, correspondente ao diâmetro dos raios dos tricomas estrelados. A forma dos tarsúngulos, associada às diferenças no seu padrão de crescimento permite às larvas destas duas espécies de Cassidinae se moverem com eficiência sobre a superfície pubescente de sua planta hospedeira.

Assuntos