Resumo
Belostomatidae is a family of giant water bugs with 52 valid species in Brazil. Here, we list 33 valid species housed in the Invertebrates Collection of the Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Brazil. Of the total species examined, 26 had their distributional ranges increased (new records provided in parentheses): Belostoma amazonum Estévez & Polhemus (Mato Grosso and Roraima); B. aurivillianum (Montandon) (Rondônia); B. bosqi De Carlo (Maranhão); B. candidulum Montandon (Mato Grosso do Sul); B. carajaensis Ribeiro & Estévez (Amazonas); B. dallasi De Carlo (Bahia and Pará); B. dentatum (Mayr) (Roraima); B. denticolle Montandon (Roraima); B. dilatatum (Dufour) (Maranhão); B. discretum Montandon (Rio Grande do Sul); B. elongatum Montandon (Paraná); B. estevezae Ribeiro & Alecrim (Amazonas); B. fittkaui De Carlo (Roraima); B. gestroi Montandon (Pará); B. guianae Lauck (Brazil, in Roraima); B. micantulum (Stål) (Maranhão, Rio Grande do Norte, Rondônia and Roraima); B. minusculum (Uhler) (Brazil, in Amazonas, Pará and Rio Grande do Norte); B. parvum Estévez & Polhemus (Amazonas and Roraima); B. plebejum (Stål) (Roraima); B. pygmeum (Dufour) (Pará); B. ribeiroi De Carlo (Mato Grosso do Sul); B. stollii (Amyot & Serville) (Roraima); Horvathinia pelocoroides Montandon (Rondônia); Lethocerus annulipes (Herrich-Schaeffer) (Maranhão, Paraíba and Paraná); L. delpontei De Carlo (Amazonas and Pará) and L. maximus De Carlo (Acre, Amapá, Amazonas and Roraima). In addition, we provide a list of type and non-type specimens of Belostomatidae from INPAs collection identified to the species level, photographs of these species and relevant taxonomic notes, when available.
Resumo
Belostomatidae is a family of giant water bugs with 52 valid species in Brazil. Here, we list 33 valid species housed in the Invertebrates Collection of the Instituto Nacional de Pesquisas da Amazônia - INPA, Manaus, Brazil. Of the total species examined, 26 had their distributional ranges increased (new records provided in parentheses): Belostoma amazonum Estévez & Polhemus (Mato Grosso and Roraima); B. aurivillianum (Montandon) (Rondônia); B. bosqi De Carlo (Maranhão); B. candidulum Montandon (Mato Grosso do Sul); B. carajaensis Ribeiro & Estévez (Amazonas); B. dallasi De Carlo (Bahia and Pará); B. dentatum (Mayr) (Roraima); B. denticolle Montandon (Roraima); B. dilatatum (Dufour) (Maranhão); B. discretum Montandon (Rio Grande do Sul); B. elongatum Montandon (Paraná); B. estevezae Ribeiro & Alecrim (Amazonas); B. fittkaui De Carlo (Roraima); B. gestroi Montandon (Pará); B. guianae Lauck (Brazil, in Roraima); B. micantulum (Stål) (Maranhão, Rio Grande do Norte, Rondônia and Roraima); B. minusculum (Uhler) (Brazil, in Amazonas, Pará and Rio Grande do Norte); B. parvum Estévez & Polhemus (Amazonas and Roraima); B. plebejum (Stål) (Roraima); B. pygmeum (Dufour) (Pará); B. ribeiroi De Carlo (Mato Grosso do Sul); B. stollii (Amyot & Serville) (Roraima); Horvathinia pelocoroides Montandon (Rondônia); Lethocerus annulipes (Herrich-Schaeffer) (Maranhão, Paraíba and Paraná); L. delpontei De Carlo (Amazonas and Pará) and L. maximus De Carlo (Acre, Amapá, Amazonas and Roraima). In addition, we provide a list of type and non-type specimens of Belostomatidae from INPAs collection identified to the species level, photographs of these species and relevant taxonomic notes, when available.(AU)
Resumo
Se ilustran y describen en detalle, por primera vez, las ninfas I y III - V de Sigara (Tropocorixa) denseconscripta (Breddin, 1897) con énfasis en la morfometría y quetotaxia de ciertas estructuras. Se proveen los caracteres útiles para identificar los estadios ninfales y las ninfas de las especies de Sigara.(AU)
The nymphal instars I and III - V of Sigara (Tropocorixa) denseconscripta (Breddin, 1897) are figured and described in detail, for the first time, with emphasis on morphometry and chaetotaxy of selected structures. The useful characters to identify the nymphal instars and the nymphs of the species of Sigara are provided.(AU)
Assuntos
Animais , Hemípteros/classificação , Hemípteros/crescimento & desenvolvimento , Ninfa/classificação , Comportamento ReprodutivoResumo
Se ilustran y describen en detalle, por primera vez, las ninfas I y III - V de Sigara (Tropocorixa) denseconscripta (Breddin, 1897) con énfasis en la morfometría y quetotaxia de ciertas estructuras. Se proveen los caracteres útiles para identificar los estadios ninfales y las ninfas de las especies de Sigara.
The nymphal instars I and III - V of Sigara (Tropocorixa) denseconscripta (Breddin, 1897) are figured and described in detail, for the first time, with emphasis on morphometry and chaetotaxy of selected structures. The useful characters to identify the nymphal instars and the nymphs of the species of Sigara are provided.
Assuntos
Animais , Comportamento Reprodutivo , Hemípteros/classificação , Hemípteros/crescimento & desenvolvimento , Ninfa/classificaçãoResumo
This work aimed to assess the effect of certain physical-chemical variables and the Habitat Integrity Index (HII) have on an aquatic and semi-aquatic heteropteran community. We collected in five streams (from 1st to 4th order) that differed in habitat integrity, in order to test 1) whether heteropteran richness decreases with the Habitat Integrity Index; and 2) whether richness responds to alterations in water physical-chemical variables, since these influence community structure. In each stream, linear transects of 100 m were demarcated. A total of 1425 specimens from 10 families, 30 genera and 67 morphospecies were collected. Species richness was correlated with the Habitat Integrity Index (HII), showing a positive relationship only for Gerromorpha. This may be due to the fact that streams with greater integrity offer nearby marginal vegetation where prey and shelter can be easily found, representing optimal places for oviposition and hunting. Species adapted to such conditions are more sensitive to alterations in the physical structure of rivers. Significant differences in the composition of Heteroptera and studied infra-orders were also observed, which suggests that the anthropic disturbances over these sites have changed these insect communities. Our results indicate that the alteration in riparian areas can lead to significant changes in Heteroptera composition, even though species richness was not affected. The physical-chemical variables showed no influence on the distribution of species. This result suggests that the environment presented insufficient variation that could cause changes in the investigated community, which implies that factors other than those analyzed here may explain such variation. Three species Rhagovelia trailli (White, 1879), Rhagovelia sp. 4 and Tenagobia incerta (Lundblad, 1928) were considered to be indicators of pristine sites. The results indicate that aquatic and semi-aquatic Heteroptera and more specifically the sub-order Gerromorpha can be an important tool to assess environmental habitat integrity and enhance conservation actions of riparian forests.
Resumo
This work aimed to assess the effect of certain physical-chemical variables and the Habitat Integrity Index (HII) have on an aquatic and semi-aquatic heteropteran community. We collected in five streams (from 1st to 4th order) that differed in habitat integrity, in order to test 1) whether heteropteran richness decreases with the Habitat Integrity Index; and 2) whether richness responds to alterations in water physical-chemical variables, since these influence community structure. In each stream, linear transects of 100 m were demarcated. A total of 1425 specimens from 10 families, 30 genera and 67 morphospecies were collected. Species richness was correlated with the Habitat Integrity Index (HII), showing a positive relationship only for Gerromorpha. This may be due to the fact that streams with greater integrity offer nearby marginal vegetation where prey and shelter can be easily found, representing optimal places for oviposition and hunting. Species adapted to such conditions are more sensitive to alterations in the physical structure of rivers. Significant differences in the composition of Heteroptera and studied infra-orders were also observed, which suggests that the anthropic disturbances over these sites have changed these insect communities. Our results indicate that the alteration in riparian areas can lead to significant changes in Heteroptera composition, even though species richness was not affected. The physical-chemical variables showed no influence on the distribution of species. This result suggests that the environment presented insufficient variation that could cause changes in the investigated community, which implies that factors other than those analyzed here may explain such variation. Three species Rhagovelia trailli (White, 1879), Rhagovelia sp. 4 and Tenagobia incerta (Lundblad, 1928) were considered to be indicators of pristine sites. The results indicate that aquatic and semi-aquatic Heteroptera and more specifically the sub-order Gerromorpha can be an important tool to assess environmental habitat integrity and enhance conservation actions of riparian forests.
Resumo
This work aimed to assess the effect of certain physical-chemical variables and the Habitat Integrity Index (HII) have on an aquatic and semi-aquatic heteropteran community. We collected in five streams (from 1st to 4th order) that differed in habitat integrity, in order to test 1) whether heteropteran richness decreases with the Habitat Integrity Index; and 2) whether richness responds to alterations in water physical-chemical variables, since these influence community structure. In each stream, linear transects of 100 m were demarcated. A total of 1425 specimens from 10 families, 30 genera and 67 morphospecies were collected. Species richness was correlated with the Habitat Integrity Index (HII), showing a positive relationship only for Gerromorpha. This may be due to the fact that streams with greater integrity offer nearby marginal vegetation where prey and shelter can be easily found, representing optimal places for oviposition and hunting. Species adapted to such conditions are more sensitive to alterations in the physical structure of rivers. Significant differences in the composition of Heteroptera and studied infra-orders were also observed, which suggests that the anthropic disturbances over these sites have changed these insect communities. Our results indicate that the alteration in riparian areas can lead to significant changes in Heteroptera composition, even though species richness was not affected. The physical-chemical variables showed no influence on the distribution of species. This result suggests that the environment presented insufficient variation that could cause changes in the investigated community, which implies that factors other than those analyzed here may explain such variation. Three species Rhagovelia trailli (White, 1879), Rhagovelia sp. 4 and Tenagobia incerta (Lundblad, 1928) were considered to be indicators of pristine sites. The results indicate that aquatic and semi-aquatic Heteroptera and more specifically the sub-order Gerromorpha can be an important tool to assess environmental habitat integrity and enhance conservation actions of riparian forests.
Resumo
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.
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.
Resumo
A list of aquatic and semiaquatic Heteroptera from a collecting trip to Pitinga, a village in a mining area in the County of Presidente Figueiredo in the Central Amazon is presented. Identified were fifty five species of Heteroptera, distributed in 13 families. Among the insects collected, some are new records for this Amazonian region and in addition 3 apparently undescribed species of Microvelia and one of Paravelia remain for further study.
Uma lista de heterópteros aquáticos e semi-aquáticos coletados durante uma viagem a Pitinga, uma área de mineração no município de Presidente Figueiredo, na Amazônia Central, é apresentada. Foram coletadas 55 espécies de Heteroptera, distribuídas em 13 famílias. Entre os insetos coletados, alguns são registros novos para essa região amazônica.