Reading the Complex Skipper Butterfly Fauna of One Tropical Place
Reading the Complex Skipper Butterfly Fauna of One Tropical Place Daniel H. Janzen1*, Winnie Hallwachs1, John M. Burns2, Mehrdad Hajibabaei3, Claudia Bertrand3, Paul D. N. Hebert3 1 Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America, 2 Department of Entomology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America, 3 Department of Integrative Biology, Biodiversity Institute of Ontario, University of Guelph, Guelph, Canada Abstract Background: An intense, 30-year, ongoing biodiversity inventory of Lepidoptera, together with their food plants and parasitoids, is centered on the rearing of wild-caught caterpillars in the 120,000 terrestrial hectares of dry, rain, and cloud forest of Area de Conservacion Guanacaste (ACG) in northwestern Costa Rica. Since 2003, DNA barcoding of all species has aided their identification and discovery. We summarize the process and results for a large set of the species of two speciose subfamilies of ACG skipper butterflies (Hesperiidae) and emphasize the effectiveness of barcoding these species (which are often difficult and time-consuming to identify). Methodology/Principal Findings: Adults are DNA barcoded by the Biodiversity Institute of Ontario, Guelph, Canada; and they are identified by correlating the resulting COI barcode information with more traditional information such as food plant, facies, genitalia, microlocation within ACG, caterpillar traits, etc. This process has found about 303 morphologically defined species of eudamine and pyrgine Hesperiidae breeding in ACG (about 25% of the ACG butterfly fauna) and another 44 units indicated by distinct barcodes (n = 9,094), which may be additional species and therefore may represent as much as a 13% increase.
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