6urn:lsid:arphahub.com:pub:DE333E49-E4EE-5693-9BEF-D446E6301C98urn:lsid:zoobank.org:pub:55528528-5C97-4D79-A718-8B3D153B37CCJournal of Hymenoptera ResearchJHR1070-94281314-2607Pensoft Publishers10.3897/jhr.93.9129891298Short CommunicationVespidaeBehaviour General ecologyCenozoicSouth AmericaNesting of the keyhole wasp Pachodynerusnasidens (Latreille, 1812) (Vespidae, Eumeninae) in a nest of a paper wasp (Vespidae, Polistinae)JacquesGabriel de Castrogabriel.jacques@ifmg.edu.brhttps://orcid.org/0000-0002-9619-60651ConceptualizationWriting - review and editingSupervisionDonizet FerreiraWellingtonhttps://orcid.org/0000-0003-2357-554723Writing - original draftMethodologyAparecida MouraPaolahttps://orcid.org/0000-0002-1521-49714Writing - original draftInvestigationTeofilo-GuedesGabrielhttps://orcid.org/0000-0001-9462-39195Writing - original draftInvestigationMethodologyMagalhães de SouzaMarcoshttps://orcid.org/0000-0003-0415-17144Instituto Federal de Educação, Ciência e Tecnologia de Minas Gerais - IFMG, Campus Bambuí, Varginha Farm, Bambuí/Medeiros Highway - Km 05, Bambuí, Minas Gerais, BrazilInstituto Federal de Educação, Ciência e Tecnologia de Minas GeraisBambuíBrazilLaboratório de Sistemática e Biologia de Insetos, Departamento de Biologia, Universidade Federal de Lavras - UFLA, Lavras, Minas Gerais, BrazilUniversidade Federal de LavrasMinas GeraisBrazilUniversidade do Estado de Minas Gerais - UEMG Campus Divinópolis, Divinópolis, Minas Gerais, BrazilUniversidade do Estado de Minas GeraisLavrasBrazilInstituto Federal de Educação, Ciência e Tecnologia do Sul de Minas - IFSULDEMINAS, Campus Inconfidentes, Tiradentes Square, 416, Inconfidentes, Minas Gerais, BrazilInstituto Federal de Educação, Ciência e Tecnologia do Sul de Minas - IFSULDEMINASInconfidentesBrazilInstituto de Geociências, Universidade Estadual de Campinas - UNICAMP, Zeferino Vaz University City, Barão Geraldo, Campinas, São Paulo, BrazilUniversidade Estadual de CampinasSão PauloBrazil
Corresponding author: Gabriel de Castro Jacques (gabriel.jacques@ifmg.edu.br)
Academic editor: Michael Ohl
20223110202293125130289C209E-94CF-5C9D-BA47-0751A663EC09C89E8615-F877-4178-843A-E70CB36618FB75509440508202223082022Gabriel de Castro Jacques, Wellington Donizet Ferreira, Paola Aparecida Moura, Gabriel Teofilo-Guedes, Marcos Magalhães de SouzaThis is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.http://zoobank.org/C89E8615-F877-4178-843A-E70CB36618FB
Potter wasps (Hymenoptera, Vespidae, Eumeninae) adopt different substrates for nesting, including other wasp nests. Nevertheless, such behavior rarely occurs with abandoned nests of the paper wasps (Hymenoptera, Vespidae, Polistinae). In this study, we report the occurrence involving the nesting of a potter wasp on a paper wasp’s nest. Such a record occurred in November 2021 in a segment of a deciduous forest, at Mata Seca State Park, Southeast Brazil. An abandoned Polistinae nest was found, with 14 cells sealed with mud, from which four male Pachodynerusnasidens individuals emerged. This record of P.nasidens reusing a Polistinae’s nest increases our knowledge of Eumeninae nesting strategies and on possible associations between different groups of vespid wasps.
Jacques GC, Donizet Ferreira W, Aparecida Moura P, Teofilo-Guedes G, Magalhães de Souza M (2022) Nesting of the keyhole wasp Pachodynerus nasidens (Latreille, 1812) (Vespidae, Eumeninae) in a nest of a paper wasp (Vespidae, Polistinae). Journal of Hymenoptera Research 93: 125–130. https://doi.org/10.3897/jhr.93.91298
Introduction
The Vespidae family includes around 5300 species (Piekarski et al. 2018), which present diverse nesting and social behaviors (Iwata 1976; Cowan 1991). Among Neotropical vespids, two taxa stand out in this regard: Eumeninae, with 3404 species (Piekarski et al. 2018), usually builds their nests with mud and are commonly classified as solitary wasps (Hermes et al. 2014); and Polistinae, with 1003 species (Piekarski et al. 2018), uses macerated cellulose for nesting and presents eusocial behavior (Somavilla and Carpenter 2021). Several ecosystem services are attributed to these insects, including floral visiting (Pires et al. 2022) and biological control of agricultural pests (Jacques et al. 2020), which demonstrates their ecological and economic importance (Brock et al. 2021).
Records of other insects reusing nests of Polistinae wasps are scarce (Bakar et al. 2015). For example, Pinto (2005), recorded solitary bee Tetrapediadiversipes Klug, 1810 reusing nests of Polistes, affirming that nests without an envelope were more propitious for reuse. Rau (1928) also reported the reuse of Polistes nests by species of Apoidea: Trypoxylon Latreille, 1796 and Osmia Panzer, 1806. There are also reports of the use of abandoned Polistinae nests by solitary wasps of the subfamily Eumeninae (Rau, 1944), who recorded the reuse of old Polistes nests by Euodynerusforaminatus (de Saussure, 1853) and Paracinstrocerusfulvipes (de Saussure 1856). Here, we add information to this ecological condition, with a report of the occurrence of the species of EumeninaePachodynerusnasidens (Latreille, 1812) reusing a Polistinae nest, recorded in a Neotropical seasonal forest, in Southeast Brazil.
Methods
We made this observation on November 30th, 2021, at the beginning of the rainy season, in the Mata Seca State Park, an Integral Protection Conservation Unit, situated in the municipalities of Manga and Itacarambi, the northern part of the State of Minas Gerais, Brazil (14°52'0"S, 43°59'58"W). This region houses deciduous forest remnants, the phytophysiognomy of the Atlantic Rainforest Domain. More than 50% of arboreous species are deciduous, characterized by the intensive loss of leaves in response to the two defined seasons of the year: rainy (spring/summer) and dry (fall/winter) (Belém et al. 2021).
We carried out the photographic record in the field, with a digital camera Nikon 60x Optical Zoom Wide. The nest was collected and stored in a glass recipient topped with a net, allowing gas exchange with the external environment and avoiding escape by the insects which would emerge from the occupied cells. Nest observations were performed daily until the imagoes emerged, at the Zoology Laboratory, in the Federal Institute of Education, Science, and Technology of South Minas Gerais – IFSULDEMINAS, Campus Inconfidentes.
To identify the genus of Polistinae that would have produced the nest, we adopted the dichotomous key of Barbosa et al. (2021) and compared the nest with others stored in the IFSULDEMINAS entomological collection. The nest length and diameter were measured, in addition to the dimensions of the collected specimens, using a pachymeter, 0.2 mm precise. The number and relative position of both empty and sealed cells were also registered. To identify the individuals that emerged from the occupied reused cells, a stereoscopic microscope Leica S8 APO was used and the dichotomous key of Carpenter and Garcete-Barrett (2002 [2003]) at the genus level, and the dichotomic criteria presented by Willink and Roig-Alsina (1998), at the specific level, were employed.
Results
We found one Polistinae nest, built on the plant species Quiabentiazehntneri (Britton & Rose) Britton & Rose (Cactaceae). This nest is of the gymnodomous type (Richards and Richards 1951; Barbosa et al. 2021), without a protection envelope, 154.2 mm in length (pedicel to the basis), and 40 mm in width. It contained a total of 223 counted cells, 14 of which were sealed with mud, indicating the probable presence of solitary wasps (Fig. 1). Four of the sealed cells belonged to the medium portion of the nest, and the other 10 cells, to the superior portion, 20 mm from the pedicel.
Polistinae’s abandoned nest A with sealed cells occupied B by juveniles of the Pachodynerusnasidens solitary species (Vespidae, Eumeninae).
https://binary.pensoft.net/fig/763788
Two weeks after the field collection, on December 14th, 2021, four male individuals of Pachodynerusnasidens (Latreille, 1812) emerged from the cells at the nest medium portion. These cells were situated around 60 mm above the basis, with an average diameter of 6.2 mm. P.nasidens sealed the cells’ entrance and underlaid their bottom, having emerged one adult individual for each cell.
Individuals emerging from these cells presented average measurements of 7.395 mm in body length, 2.68 mm in mesosoma width, and 3.485 mm in T2 width. These male individuals presented average dimensions, relatively smaller than those presented by P.nasidens females deposited in the Entomological Collection of Federal University of Lavras (CEUFLA) (9.03 mm in body length, 3.78 mm in mesosoma width, 3.485 mm in T2 width). The other 10 sealed cells presented an average diameter of 5.74 mm; we did not observe emergence from them until May 1st, 2022.
Discussion
Nests completely built by P.nasidens are rare. This species commonly acts as an inquiline, in cavities made by humans (House et al. 2020) or in abandoned nests of other hymenopterans (Freeman and Jayasingh 1975; Matthews and González 2004). P.nasidens also build mud structures in the ground and fixed to plants (Carpenter 1986). The use of abandoned cavities in cells of a Polistinae nest seems to be one more case of the species’ plasticity in nesting behavior.
Pachodynerusnasidens nesting peaks occur in months of higher temperature and humidity throughout the year (House et al. 2020). The ideal temperature for egg development ranges from 26 to 31 °C (Jayasing and Taffe 1982), while higher humidity ensures the availability of water and mud for nest building (Freeman and Jayasingh 1975), explaining our record in the hot and humid season.
The nesting preference of P.nasidens is for cavities with openings of 6 to 9 mm in diameter (Bequaert 1948; Oliveira-Nascimento and Garófalo 2014), which explains the use of Polistinae cells, which have 6.2 mm in average diameter. The exclusive emergence of male individuals, smaller than females from the same collection, may be related to the cell size of the Polistinae nest, which may be too small for females’ development. In this species, feminine eggs are usually elongated in comparison with masculine ones. Additionally, female immatures develop more slowly and need more food, consequently needing a bigger physical space for development (Jayasingh 1980; Jayasingh and Taffe 1982).
The nest herein described probably belonged to Polistesversicolor (Olivier, 1791). According to the dichotomous key presented by Barbosa et al. (2021), we conclude that this nest was produced by Polistes social wasp genus. Close to the abandoned nest, we found nests of P.versicolor, including one being built on Q.zehntneri (Moura et al. 2022). In another study (Jacques et al. in press) the Polistinae diversity on social wasps from the Mata Seca State Park is presented, in which only nests of this species of the genus Polistes genus were found.
Acknowledgements
To IFMG – Campus Bambuí and IFSULDEMINAS – Campus Inconfidentes for logistics. To JLV, manager of the Mata Seca State Park – MG for field support. To the field team composed of interns of IFMG and IFSULDEMINAS. To ICMBio for providing the field collection license. To Prof Dr. Marcel Hermes, curator of the Entomological Collection of Federal University of Lavras (CEUFLA), for providing infrastructure, literature, and help in determining the Eumeninae species. WDF and GTGS are funded by CNPq (141168/2018-8) (132617/2020-0).
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