Ants have long been a passion of mine, and I am occupied with several projects related to ant taxonomy, evolution, and systematics.
My evolutionary research focuses on closely-related groups of ant species, as I use patterns of recent speciation to infer how evolutionary processes may function across diverse landscapes and ecological contexts. I have worked extensively on the neotropical genus Linepithema, a group best known for the pestiferous Argentine ant L. humile, and have produced a molecular phylogeny and a taxonomic revision of the roughly 20 species. Ongoing phylogenetic research includes studies in the genera Pheidole, Azteca, and Simopelta.
My taxonomic work addresses some of the many remaining gaps in neotropical ant systematics, tending to focus on groups that are commonly encountered but lack modern taxonomic resources. I have also focused on describing the ant fauna of Paraguay, a landlocked country that sits at a fascinating transition zone among surrounding tropical, temperate, xeric, and mesic biomes.
- Wild, A. L. 2009. Evolution of the Neotropical Ant Genus Linepithema. Systematic Entomology 34:49-62. doi 10.1111/j.1365-3113.2008.00435.x
- Wild, A. L. 2007. A Catalogue of the Ants of Paraguay (Hymenoptera: Formicidae). Zootaxa 1622: 1–55.
- Wild, A. L. 2007. Taxonomic revision of the ant genus Linepithema (Hymenoptera: Formicidae). University of California Publications in Entomology 126.
- Wild, A. L., and F. Cuezzo. 2006. Rediscovery of a fossil dolichoderine ant lineage (Hymenoptera: Formicidae: Dolichoderinae) and a description of a new genus from South America. Zootaxa 1142: 57-68.
- Wild, A. L. 2005. Taxonomic revision of the Pachycondyla apicalis species complex (Hymenoptera: Formicidae). Zootaxa 834: 1–25.
Coleoptera is the most diverse of the insect orders, yet the reasons behind their tremendous diversity are still poorly understood, in part because a strong phylogenetic foundation for the group is lacking. I am currently working on an NSF-funded “Assembling the Beetle Tree of Life” project in collaboration with researchers at the University of Arizona, Brigham Young University, CSIRO, Harvard University, and elsewhere to create the first comprehensive phylogeny of the major beetle lineages.
I am especially interested in generating new sources of genetic data for beetle phylogenetics, as previous efforts using mitochondrial genes and ribosomal genes have encountered difficulty resolving the ancient divergences at the base of the beetle tree. To that end, I am developing protocols for several protein-coding nuclear genes previously unused in beetle systematics.
- Wild, A. L., and D. R. Maddison. 2008. Evaluating nuclear protein-coding genes for phylogenetic utility in the Coleoptera. Molecular Phylogenetics and Evolution 48: 877–91.
Systematics of Costa Rican Heterospilus wasps
The hyperdiverse genus Heterospilus (Braconidae: Doryctinae) is among the most common wasp genera in neotropical forests. These small parasitic insects inhabit a broad range of habitats and generally attack stem-boring beetle larvae, but little is known about the biology of most species.
Costa Rica contains approximately 500 Heterospilus, mostly undescribed. Because these wasps are abundant in insect samples from the region, the lack of knowledge about the number, nature, and identify of species forms a significant part of the taxonomic impediment. I am currently working with braconid experts Paul Marsh and Jim Whitfield to produce a monograph of the Costa Rican species that will include a molecular phylogeny, a study of character evolution, and an interactive key to species.