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Revista Colombiana de Entomología

Print version ISSN 0120-0488

Rev. Colomb. Entomol. vol.39 no.2 Bogotá July/Dec. 2013

 

 

Hemerobiidae (Neuroptera) in the midwestern région of Minas Gérais State, Brazil

Hemerobiidae (Neuroptera) en la région del medio-oeste del estado de Minas Gérais, Brasil

ROBERTO C. OLIVEIRA1, ROGÉRIA I. R. LARA2, ALYSSON R. FONSECA3 and NELSON W. PERIOTO4

1 Entomology Master, Universidade Federal de Lavras, Departamento de Entomologia, 37200-000, Lavras, MG, Brazil. robertocesarbio@yahoo.com.br.
2
Ph. D. Agencia Paulista de Tecnologia dos Agronegócios, APTA Ribeirao Preto, Laboratòrio de Sistemática e Bioecologia de Parasitoides e Predadores, Ribeirao Preto, SP, Brasil. rirlara@apta.sp.gov.br.
3 Ph. D. Fundacao Educacional de Divinópolis FUNEDI/UEMG, Departamento de Pesquisa, Bairro Jardim Belvedere II, 35500-970, Divinópolis, MG, Brasil. arodrigo@funedi.edu.br. Correspondig author.
4 Ph. D. Agencia Paulista de Tecnologia dos Agronegócios, APTA Ribeirao Preto, Laboratòrio de Sistemática e Bioecologia de Parasitoides e Predadores, Ribeirao Preto, SP, Brasil; Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Faculdade de Ciencias Agrárias e Veterinárias, Programa de Pósgraduacao em Agronomia (Entomologia Agrícola), Jaboticabal, SP, Brasil. nperioto2@gmail.com.

Received: 26-Dec-2012 - Accepted: 12-Jul-2013


Abstract: This study aimed to identify the Hemerobiidae (Neuroptera) associated to Brazilian savannah and gallery forest, in Minas Gerais State, Brazil. The sampling was carried every two weeks at Brazilian savannah (Cerrado) in Divinópolis and at gallery forest in Pedra do Indaiá, both in Minas Gerais State, Brazil. Collecting was carried out between November 2003 and October 2004, with Malaise traps. A total of 181 specimens of five species of Hemerobiidae were collected. The species Nusalala tessellata, Megalomus impudicus, Hemerobius bolivari and Notiobiella sp. were collected in the two sites; the fifth species Sympherobius sp. was found only in Pedra do Indaiá. The species of diversity (index of Shannon-Wiener) and the equitability (J) of Hemerobiidae were similar in the areas of Brazilian savannah and gallery forest (H' = 0.47 - 0.49, respectively, and J = 0.78 - 0.69, respectively), and the differences observed between the two locations were not significant.

Key words: Brown lacewing. Biodiversity. Taxonomy. Neotropical.


Resumen: Este estudio tuvo como objetivo caracterizar los Hemerobiidae (Neuroptera) asociados al "Cerrado" sensu stricto y bosque de galería, en el estado de Minas Gerais, Brasil. El muestro de hemeróbidos se realizó quincenalmente con auxilio de trampas Malaise entre noviembre de 2003 y octubre de 2004. En las dos áreas de estudio se capturaron 181 ejemplares de hemeróbidos de cinco especies. Las especies: Nusalala tessellata, Megalomus impudicus, Hemerobius bolivari y Notiobiella sp., se encontraron en ambos sitios; la quinta especie Sympherobius sp. se encontró únicamente en Pedra do Indaiá. La diversidad de especies (índice de Shannon-Wiener) y la equitatividad (J) de Hemerobiidae fueron similares para las áreas Cerrado sensu stricto y bosque de galería (H' = 0,47 - 0,49 y J = 0,78 - 0,69) y las diferencias observadas entre los sitios de colecta no fueron significativas.

Palabras clave: Hemeróbidos. Biodiversidad. Taxonomía. Neotropical.


Introduction

Hemerobiidae is one of the most primitive groups among the Neuroptera; they were originated in the Permian (Gonzalez-Olazo 1981) and has been registered in all continents except at Antartida. The family comprises about 600 species distributed among 25 genera, from which 11 occur in the Neotropical Region (Oswald 1993, 2004; Monserrat 2003).

Hemerobius, the largest Hemerobiidae genera, has about 130 described species and has been recorded in all continents; 50 of this species have been found in the New World, and from those, five in Brazil (Monserrat 1990, 1996). Megalomus comprises 32 species, from which 30 occur in the New World and three in Brazil (Monserrat 1990, 1997). Nusalala is distributed in the Neotropics and comprises 22 species, from which four have been recorded in Brazil (Monserrat 2000); Sympherobius gathers 54 species distributed in the Holartic, Neotropical and Afrotropical regions, and seventeen of those occur in the Neotropical Region (Oswald 1988), and among them, four occur in Brazil (Monserrat 1990; Lara and Perioto 2003).

Several species of Hemerobiidae act as predators of insect pests of commercial crops such as soybean, cotton, citrus, and coffee (Gonzalez-Olazo 1987; Lara and Freitas 2002; Lara and Perioto 2003). Larvae and adults of Hemerobiidae feed on a great variety of small plant sucking arthropod, especially aphids, soft scales, psyllids, mites, and other soft-bodied species (Penny and Monserrat 1983; Oswald 1993). Hemerobius Linnaeus, 1758 (Hemerobiinae), Megalomus Rambur, 1842 (Megalominae), Nusalala Navas, 1913 (Mi-crominae) and Sympherobius Banks, 1904 (Sympherobiinae) are the most common genera found in agricultural and wild environments (Penny and Monserrat 1983; Lara and Freitas 2002, 2003; Lara et al. 2008, 2010).

Little is known about the fauna of this group in Brazil: the limited information available comes from taxonomic studies (Penny and Monserrat 1983; Lara and Freitas 2002, 2003), occurrence records (Chagas et al. 1982; Lara and Perioto 2003), and biology studies (Souza et al. 1990; Souza and Ciociola 1997). The aim of this study was to identify the Hemerobiidae species associated to Brazilian savannah and gallery forest in the Midwest Region of the Minas Gerais State (MG), Brazil.

Material and methods

Sampling was conducted in two locations: one in a 1,2 ha area of Brazilian savannah located in the FUNEDI/UEMG campus (20°08'21"S 44°53'17"W, 712 m) which was surrounded by allotments in the suburbs of Divinopolis, MG; and another one in a gallery forest about 22 meters wide located in Pedra do Indaia (20°15'53"S 45°09'48"W, 857 m) also in MG. The gallery forest's canopy can reach up to 18 meters, and hosts in its interior a creek that belongs to the Lambari River basin, which is surrounded by Brachiaria sp. (Poaceae) pastures. The Malaise traps were installed 10 m away from the border of the Brazilian savannah area, and 4.5 m away from the creek in the gallery forest.

The collections were conducted every two weeks between November 2003 and October 2004. The traps remained active during all the collection period. The material was taken to the Zoology Laboratory of Fundacao Educacional de Divinópolis FUNNEDI, where they were screened for insects. The Hemerobiidae obtained were sent to the Laboratorio de Sistemática e Bioecologia de Parasitoides e Predadores da APTA Ribeirao Preto, Sao Paulo. There they were identified based on articles by Oswald (1993) and Monserrat (1996, 1997, 2000).

Shannon-Wiener (H') and equitability J (ShannonWiener) indexes were used for the analysis of the Hemerobiidae's fauna diversity. To estimate the values from these indexes, a base -10 logarithm was applied, and the calculations were obtained with the software DivEs (Rodrigues 2005). The diversity values obtained were compared by the t-test described by Magurran (1988).

Results and discussion

A total of 181 specimens of Hemerobiidae from five different species were collected in the study plots.

In Divinópolis' Brazilian savannah area, 89 specimens from four species were collected (Table 1): Nusalalla tessellata (Gerstaecker, 1888) (45 specimens/50.5% of the total Hemerobiidae collected), Megalomus impudicus (Gerstaecker, 1888) (30/33.7%), Hemerobius bolivari Banks, 1910 (11/12.3%) and Notiobiella sp. (3/3.3%).

In Pedra do Indaiá's gallery forest area, 92 Hemerobiidae from five species were collected (Table 1): N. tessellata (54/58.6% of the Hemerobiidae specimens collected), M. impudicus (20/21.7%), H. bolivari (12/13%), Sympherobius sp. (5/5.4%) and Notiobiella sp. (1/1%).

In both areas, the greatest Hemerobiidae abundance occurred between June and October. During this period in Divinópolis, 74 specimens were collected, which represents 83.1% of the total collection in that area, a fairly high number that was close to the one registered in Pedra do Indaiá (81/ 88%); the greatest frequencies occurred in August and September 2004, respectively.

The structure of the Hemerobiidae communities in both studied locations were quite similar. Three species, N. tessellata, M. impudicus and H. bolivari, represented about 95% of the specimens collected. In both environments, N. tessellata was the most abundant species, followed by M. impudicus and H. bolivari, respectively. In Pedra do Indaiá, the frequency peak of N. tessellate was observed in September 2004, when 33 specimens were captured (61% of the total collected specimens from that species); in Divinópolis, two peaks were observed, one in June and another in August (Fig. 1).

Sympherobius was registered only in Pedra do Indaiá; its low frequency in distinct months difficult the analysis of such behavior.

Lara et al. (2010) reported the occurrence of N. tessellata, H. bolivari, M. impudicus, Simpherobius miranda Navás, 1920, M. rafaeli Penny and Monserrat, 1983, S. ariasi Penny and Monserrat, 1983, and Nomerobius psychodoides (Blanchard, 1851) in coffee Coffea arabica L. (Rubiaceae) crop in Cravinhos, Säo Paulo. There, the three first species represented about 83% (52.9%, 17.3% and 12.9%, respectively) of the total Hemerobiidae collected, and the highest frequencies of the groups occurred between August and March (end of winter, spring and summer), with a population peak in January (Lara et al. 2008). The great number of Hem-erobiidae captured by those authors may be due to the use of different types of traps and the greater number of samplings. Lara (comm. pers. 2012) observed that in okra Abelmoschus esculentus L. (Malvaceae), soybean Glycine max L. Merril (Fabaceae), and citrus Citrus sp. (Rutaceae) plantations, N. tessellata was the most frequently collected species, which did not happen in coconut Cocus nucifera L. (Areaceae) plantations, where M. rafaeli was predominant.

Despite the little data available, it is interesting to note that the Hemerobiidae's communities structure are very similar and dominated by only one species - except for the community found in the coconut crop. Hughes (1986) commented that in community samples, most individuals captured belong to a small number of abundant species, while most species are represented by a small number of individuals.

The Shannon-Wiener's diversity index (H') and the eq-uitability (J) index for the Divinópolis (stricto sensu Cerrado) and Pedra do Indaiá (gallery forest) areas were similar (H' = 0.47 - 0.49, respectively and J = 0.78 - 0.69, respectively). The t-test proposed by Magurran (1988) to compare two estimated values from the diversity index showed that the differences between the collection areas were not significant (Table 2).

The fact that the gallery forest area did not show a significantly greater diversity value than the Brazilian savannah area can be related to the occurrence of Notiobiella sp. only in this environment. It can also be related to the anthropic action near the forest fragment, which is surrounded by an urban community. The most uniform distribution of individuals among the taxa that was observed in the Brazilian savannah area was not significant as well, which can be a reflection of the fact that Hemerobiidae specimens occur in nine out of the twelve months of sampling.

The diversity values obtained in this study are inferior to those reported by Lara et al. (2008) in Coffea arabica L. crops monitored for two years with different sampling methods. They however, were similar to the values found by Szentkirályi (1989) in an area of corn crops with diverse adjacent vegetation. It is important to highlight the fact that in the experiment by Lara et al. (2008), the sampling period was longer and the variety of collection methods was greater.

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Suggested citation:

OLIVEIRA, ROBERTO C.; ROGÉRIA I. R. LARA; ALYSSON R. FONSECA and NELSON W. PERIOTO. 2013. Hemerobiidae (Neuroptera) in the midwestern region of Minas Gerais State, Brazil. Revista Colombiana de Entomología 39 (2): 256-259.