A new species of fringe-limb frog, genus Ecnomiohyla (Anura: Hylidae), from the Atlantic slope of Costa Rica, Central America
Taxonomic review of the genus Osbornellus Ball (Hemiptera: Cicadellidae) in Central America
Phylogeny and revision of Schraderiellus Rider, 1998 with the description of five new species (Hemiptera, Pentatomidae, Discocephalinae, Ochlerini)
Review of some species groups of the genus Oospila Warren, with descriptions of nine new species (Lepidoptera: Geometridae: Geometrinae)
Revision of the genus Palmanura Cassagnau, 1983 (Collembola: Neanuridae: Neanurinae: Sensillanurini)
The Meniscus midges of Costa Rica (Diptera: Dixidae)
Description of a new species of Imara Houlbert, 1918 (Lepidoptera: Castniidae)
A new species of Phalangogonia Burmeister (Coleoptera: Scarabaeidae: Rutelinae: Anoplognathini) from Costa Rica
Octocorals from Costa Rica: The genus Pacifigorgia (Coelenterata: Octocorallia: Gorgoniidae)
A new Costa Rican species of Leptanilloides (Hymenoptera: Formicidae: doryline section: Leptanilloidinae)
A new genus and a new Costa Rican species of Endocephalites (Chrysomelidae: Eumolpinae: Eumolpini)
A new species of flea beetle, genus Pedilia Clark (Coleoptera: Chrysomelidae: Galerucinae), from Osa Pennisula, Costa Rica
The Crematogaster (Hymenoptera, Formicidae, Myrmicinae) of Costa Rica
New species of dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) from Costa Rica and Panama
New species and revalidations of scarab beetles (Coleoptera: Geotrupidae: Athyreini and Coleoptera: Scarabaeidae: Scarabaeinae) from Costa Rica and Panama
World revision of the wasp genus Liosphex Townes, 1977 (Hymenoptera: Rhopalosomatidae)
A taxonomic review of the genus Azteca (Hymenoptera: Formicidae) in Costa Rica and a global revision of the aurita group
A taxonomic review of the genus Myrmelachista (Hymenoptera: Formicidae) in Costa Rica