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DNA barcodes uncover unexpected species richness in the Pine White Butterfly, Neophasia menapia, Paul A Opler, ,Nick Grishin,Dale Halbritter,

Notodontidae (Noctuoidea)- Moths of America north of Mexico, Colorado State University, Paul A. Opler,David W. Wagner

DNA barcodes reveal different speciation scenarios in the four North American Anthocharis species groups , Paul A Opler,Werner Back,Nick Grishin,Todd Stout,

DNA barcode library for North American butterflies (Hesperioidea and Papilionoidea)., Colorado State University, Paul A. Opler,Paul Hebert,Jacopo D'Ercola

Non-Cordilleran butterfly populations: conspecific or separate species?, Colorado State University, Paul A. Opler

Another endemic butterfly in the Sacramento Mountains of southern New Mexico, with a review of other endemics., Colorado State University, Paul A. Opler,James A. Scott

Euchloe hyantis lotta redefinition, and a large range for E. hyantis belioides (Pieridae)., Colorado State University, Paul A. Opler,James A. Scott

5 species accounts in: The Second Colorado Breeding Bird Atlas, Colorado State University, Paul A. Opler

The growing diversity of North American butterflies: What can we expecct in the future?, Colorado State University, Paul A. Opler

Phylogenetic analysis supports the recognition of Albuna beutenmulleri Skinner as a speciess distinct from A. pyramidalis Walker (Lepidoptera: Sesiidae)., Colorado State University, Paul A. Opler,Anthony I. Cognato

Genetic evaluation of the status of Lange's metalmark, a Federally Endagered butterfly, Colorado State University, Paul A. Opler,

From Ancient Capital to South of the Clouds: Butterfly Studies in China, May 2001, Paul A Opler

Butterflies of Rocky Mountain National Park

California oaks and allies as evolutionary and ecological islands for leaf-mining Lepidoptera: host individuals and species populations (abstract)

Conservation status of Colorado moths (abstract)

Genetic, phenetic, and distributional relationships of Nearctic Anthocharis (Pieridae, Pierinae, Anthocharidini)

Lepidoptera at the C.P. Gillette Museum of Arthropod Diversity, Colorado State University, Ft. Collins: Description and Holdings

A multiplex real-time polymerase chain reaction assay to diagnose Epiphyas postvittana (Lepidoptera: Tortricidae)

A new avocado pest in Central America (Lepidoptera: Tortricidae) with a key to Lepidoptera larvae threatening avocados in California

Discovery of false codling moth, Thaumatotibia leucotreta (Meyrick) in California

Discovery of Lobesia botrana ([Denis & Schiffermuller]) in California, an invasive species new to North America (Lepidoptera: Tortricidae)

Eurytides marcellus, Nymphalis antiopa, Papilio multicaudata, and Zerene eurydice species acounts

Patterns of mitochondrial haplotype diversity in the invasive pest Epiphyas postvittana (Lepidoptera: Tortricidae)

The complete book on North American Butterflies