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Revista Brasileira de Entomologia

Print version ISSN 0085-5626

Rev. Bras. entomol. vol.58 no.4 São Paulo Oct./Dec. 2014  Epub Nov 21, 2014

http://dx.doi.org/10.1590/S0085-56262014005000004 

Five new associations of parasitoids in potter wasps (Vespidae, Eumeninae)

 

 

Tiago H. Auko; Bhrenno M. Trad; Rogerio Silvestre

Laboratório de Ecologia de Hymenoptera, Faculdade de Ciências Biológicas e Ambientais, Universidade Federal da Grande Dourados, Rodovia Dourados-Itahum, km 12, Cidade Universitária, Caixa Postal 533, 79804-970 Dourados-MS, Brasil. henriqueauko@yahoo.com.br

 

 


ABSTRACT

Five new associations of parasitoids in potter wasps (Vespidae, Eumeninae). New associations of host and parasitoids involving potter wasps: Toxophora leucon and Pleurochrysis sp. were found parasitizing Cyphomenes anisitsii, Chrysis sp. (gr. intricans) was found parasitizing Minixi suffusum, Plega beardi was found parasitizing Montezumia pelagica sepulchralis and Macrosiagon sp. was found parasitizing Pachodynerus nasidens.

Keywords: Bombyliidae; Chrysididae; host wasps; Mantispidae; Rhipiphoridae.


 

 

Eumeninae is the most diverse group of Vespidae, with 3,579 species in 210 currently recognized genera in the world (Brothers & Finnamore 1993; West-Eberhard et al. 1995; Sarmiento & Carpenter 2006; Pickett & Carpenter 2010). Brazil harbors a significant richness of these wasps, with 277 species and 31 genera described. However the biology of these species in general is poorly known (Carpenter & Marques 2001; Pickett & Carpenter 2010; Hermes et al. 2013).

Adults of Eumeninae feed on nectar while the larvae are predators. Females build the nest that can be dug, made with mud or even occupying pre-existing cavities, and hunt caterpillars to provide food for the larvae (Evans 1956; Krombein 1979; Carpenter & Marques 2001; Hunt et al. 2003).

Among the natural enemies of Eumeninae there are birds, ants (Ecitoninae), bats and parasitoids (West-Eberhard et al. 1995). Insect parasitoids develop feeding on immature stages of other Arthropoda, usually killing the host (Doutt 1973; Godfray 1994). Hymenoptera is the group with most representatives among parasitoids, being responsible for 75% of the species, but this behavior also appears in other orders as Diptera, Coleoptera, Lepidoptera, Trichoptera, Neuroptera and Strepsiptera (Krombein 1967; Askew 1971; Quicke 1997).

The records presented here were made in two localities from Mato Grosso do Sul state, mid-western Brazil; both located in the Chacoan sub-region, Cerrado province (Morrone 2014). We collected four nests of Eumeninae, built with mud and set on shrubs, in the municipality of Dourados (22°11'41''S; 54°55'45''W); and one mud nest in Parque Nacional da Serra da Bodoquena (20°44'24''S; 56°44'13''W). The nests were brought to the Universidade Federal da Grande Dourados, and kept at approximately 26°C. Voucher specimens are deposited at the Museu de Biodiversidade (MuBio - Universidade Federal da Grande Dourados), Mato Grosso do Sul, with the exception of one specimen of Diptera that was deposited in the MZUSP collection.

Four species of Eumeninae were recorded as hosts to five species of parasitic insects (Table I). The first nest of Cyphomenes anisitsii (Brèthes, 1906) was collected in January 2009, measuring 1,7 cm x 3,8 cm (diameter/length). At 21 March 2009 the first wasp (♂) emerged, and the three other wasps (♀) emerged after an interval of 48 hours each. Finally on 31 March 2009 a Bombyliidae (Diptera), Toxophora leucon Séguy, 1930 (Fig. 1a), emerged four days after the last wasp had emerged. The second nest of C. anisitsii was collected in November 2011, measuring 1,5 cm x 3,5 cm (diameter/length). One cuckoo wasp (♂), Pleurochrysis sp. (Fig. 1b), emerged on 20 December 2011. The potter wasp C. anisitsii emerged three days after the parasitoid.

 

 

 



 

One nest of Minixi suffusum (Fox, 1899) was collected in April 2012, and measured 1.3 cm x 1.2 cm (length/diamenter). The wasp Chrysis sp. (gr. intricans) (♂) (Fig. 1c) emerged two weeks later in the lab, and 48 hours later the wasp M. suffusum emerged. One individual of M. suffusum (♂) was found dead in the nest.

One nest of Montezumia pelagica sepulchralis Saussure, 1856 was collected on March 2013, containing four cells, with 1.5 cm x 0.8 cm (length/diameter) each, resembling nests of Priochilus captivum Fabricius, 1804 (Hymenoptera, Pompilidae) (Starr 2012; Auko et al. 2013). Three wasps emerged in the laboratory, one on 05 April 2013 (♂), and two (♀) on 25 and 27 April 2013, respectively. On 21 May 2013 an individual (♂) of Plega beardi Penny, 1982 (Neuroptera, Mantispidae) emerged (Fig. 1d).

On February 2014 we collected one nest of Pachodynerus nasidens (Latreille, 1812), containing tree cells, with 1.7 cm x 0.8 cm (length/diameter) each. The first insect that emerged was a potter wasp (♀), and after a few hours a parasitoid beetle Rhipiphoridae (Coleoptera), Macrosiagon sp., emerged (Fig. 1e). One male of P. nasidens failed to complete development and died in the nest.

Species of Toxophora have been found parasitizing the genera Ancistrocerus, Stenodynerus, Pachodynerus, Euodynerus, and Monobia (Krombein 1967). The genus Cyphomenes is here recorded for the first time. Toxophora leucon was previously record in the municipality of Corumbá, MS by Cunha et al. (2009).

Cuckoo wasps are common parasites of potter wasps (Krombein 1967; Gauld & Hanson 1995; Sears et al 2001). In Brazil, the interaction between cuckoo wasps and Eumeninae has been described by Camilo (1999), who recorded one species of Chrysididae parasitoid of Brachymenes dyscherus (Saussure, 1852) in Cerrado from São Paulo state. Here we obtained the first host association of Pleurochrysis sp. and Chrysis sp. (gr. intricans) on Cyphomenes and Minixi, respectively. Pleurochrysis is strictly Neotropical, while Chrysis is better represented in the Nearctic region (Kimsey & Bohart 1990).

Plega is restricted to the Americas, with four species recorded from Brazil; P. beardi was only recorded for the Amazon region, in Para state (Penny 1982; Penny & Costa 1983; Maia-Silva et al. 2013). The larvae of Plega feed on immature stages of Hymenoptera, as for example the eumenine genus Zethus and eusocial bees in Brazil, and crabronid wasps of the genus Trypoxylon and the bee genus Hylaeus in Trinidad (Smith 1863; Penny 1982; Penny & Costa 1983; Linsley & Mac-Swain 1955; Ohl 2004; Buys 2008; Hook et al. 2010; Maia-Silva et al. 2013). This is the second record of Plega beardi, and the first record of Montezumia as host of Plega.

Beetles of the genus Macrosiagon have already been recorded using eumenine wasps and cockroaches as host in the Oriental, Palearctic, Nearctic and Australasian regions (Krombein 1967; Callan 1981; Mathews & González 2004; Batelka & Hoehn 2007; Batelka 2013). Hunt (1993) already supposed that Macrosiagon could be hosted by P. nasidens.

There are few records of insect parasitoids of Eumeninae in South America, but it seems that, with the exception of Hymenoptera, most groups have generalist habits, using different wasp species as hosts (Krombein 1967). Knowledge of the natural enemies of Eumeninae can help in the interpretation of their nesting behavior, which in turn, acts as key part to understanding the evolution of social behavior, since these wasps range from solitary to primitively social (Hermes et al. 2013).

 

ACKNOWLEDGEMENTS

Our thanks go to: Dr. Bolívar R. Garcete-Barrett, Dr. Marcel G. Hermes, Daercio A. A. Lucena, and Dr. Lynn S. Kimsey for determination of species of wasps (Eumeninae, Chrysididae); Dr. Dalton Amorin and Dr. Carlos Lama for determination of species and for the picture of Diptera. We thanks Carlos Campaner for Coleoptera determination and Renato José Machado for Mantispidae determination. We thank Vander Carbonari and Rafael Crepaldi for collecting some of the nests, and Carlos D'Apolito for revising the manuscript.

 

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Received 6 June 2014
Accepted 5 August 2014

 

 

Associate Editor: Marcel G. Hermes

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