Primitive nest architecture and small monogynous colonies in basal Attini inhabiting sandy beaches of southern Brazil
- 24 April 2007
- journal article
- research article
- Published by Informa UK Limited in Studies on Neotropical Fauna and Environment
- Vol. 42 (2), 121-126
- https://doi.org/10.1080/01650520601065509
Abstract
The species Mycetophylax conformis, M. simplex and Cyphomyrmex morschi, all belonging to the basal Attini, occur exclusively on beaches along the Atlantic shores of South America. In Brazil C. morschi colonies were found sympatrically with the two Mycetophylax species which, however, had no overlap in their geographic distribution. We recorded species‐specific nesting site preferences resulting in a zonal colonization of dune and restinga areas, with distinct preferences in microhabitat choice. After excavating subterraneous nests, we were able to describe details of nest architecture, especially with regard to the number and position of the fungus chambers. The nest structure is similar in all species, but the colony size differed with the highest number of workers in M. simplex. All nests were headed by a single mated queen. First attempts were undertaken to maintain colonies under laboratory conditions. Resumo As espécies Mycetophylax conformis, M. simplex e Cyphomyrmex morschi fazem parte do grupo dos Attini basais e ocorrem exclusivamente em praias do Atlântico na América do Sul. No Brasil C. morschi ocorre simpatricamente com as espécies de Mycetophylax, mas as duas espécies de Mycetophylax não tem uma sobreposição na sua distribuição geográfica. Também detectamos preferências específicas na escolha da área da nidificação o que resulta em uma colonização zonal das dunas e restingas com preferências distintas na escolha do microhabitat. Com escavações cuidadosas de um número representativo de ninhos obtivemos detalhes sobre a arquitetura, em especial o número e posição das câmaras de fungo. A estrutura subterrânea dos ninhos é similar nas espécies estudadas mas o tamanho da população difere entre as espécies com o maior número de operárias em M. simplex. Todas as colônias tem uma rainha que copulou apenas uma única vez. Primeiras tentativas de manutenção de colônias no laboratório foram feitas.Keywords
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