Genetic Diversity in Pioneer Ants: The Cardiocondyla shuckardi Group

Jürgen Heinze; Peter G. Hawkes

doi:10.13102/sociobiology.v70i3.10098

Authors

Jürgen Heinze Zoology/Evolutionary Biology, University of Regensburg, Regensburg, Germany
Peter G. Hawkes AfriBugs CC, Pretoria, Gauteng Province & Vhembe Biosphere Reserve, University of Venda, Thohoyandou, South Africa

DOI:

https://doi.org/10.13102/sociobiology.v70i3.10098

Keywords:

Cardiocondyla venustula, Cardiocondyla zoserka, phylogeny, Afrotropis

Abstract

The myrmicine ant genus Cardiocondyla consists of around 80 species of small, inconspicuous ants, which live mainly in subtropical and tropical Africa, Eurasia, and Australia. Several species have been accidentally introduced to America and have also invaded numerous originally ant-free islands around the world. The diversity of life histories in this genus, with lethally fighting wingless males, dominance hierarchies among queens, and considerable variation in the sociogenetic organization of colonies across species, has made it an interesting model to investigate the evolution and behavioral ecology of reproductive strategies. Taxa of the African Cardiocondyla shuckardi group are of particular interest, as in a phylogeny they lie between facultatively polygynous species with fatal male competition and monogynous species with mutually tolerant males. Studies on male behavior and sociogenetics in C. “venustula,” a widespread member of the C. shuckardi group, showed that males defend small territories inside their subterraneous nests. At the same time, they revealed a surprisingly large variability in mtDNA haplotypes both within and between populations in South Africa, Angola, and Côte d’Ivoire. As the different lineages are very similar in morphology and nuclear markers, more research is needed to clarify the very confused taxonomic situation in this fascinating group of ants.

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