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Daniel Janzen        
University of Pennsylvania
Philadelphia, United States of America
http://janzen.sas.upenn.edu
23 articles by this author
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Monograph
A revision of the parasitoid wasp genus Alphomelon Mason with the description of 30 new species (Hymenoptera, Braconidae)
    Jose L. Fernandez-Triana,     Eduardo M. Shimbori,     James B. Whitfield,     Angelica M. Penteado-Dias,     Scott R. Shaw,     Caroline Boudreault, Jayme Sones, Kate Perez, Allison Brown, Ramya Manjunath, John M. Burns,     P. D. N. Hebert,     M. Alex Smith, Winnifred Hallwachs,     Daniel H. Janzen
10.3897/zookeys.1175.105068
 16-08-2023
 Unique: 2233 | Total: 3276  | Access Period:
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 5-162
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Forum Paper
More discussion of minimalist species descriptions and clarifying some misconceptions contained in Meier et al. 2021
    Michael J. Sharkey, Erika M. Tucker,     Austin Baker,     M. Alex Smith, Sujeevan Ratnasingham, Ramya Manjunath,     Paul Hebert,     Winnie Hallwachs,     Daniel Janzen
10.3897/zookeys.1110.85491
 05-07-2022
 Unique: 2429 | Total: 3186  | Access Period:
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 135-149
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Research Article
Addendum to a minimalist revision of Costa Rican Braconidae: 28 new species and 23 host records
    Michael J. Sharkey,     Austin Baker,     Kathryn McCluskey,     Alex Smith,     Suresh Naik, Sujeevan Ratnasingham, Ramya Manjunath, Kate Perez, Jayme Sones, Michelle D'Souza, Brianne St. Jacques,     Paul Hebert, Winnie Hallwachs,     Daniel Janzen
10.3897/zookeys.1075.72197
 07-12-2021
 Unique: 3272 | Total: 4658  | Access Period:
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 77-136
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Monograph
Minimalist revision and description of 403 new species in 11 subfamilies of Costa Rican braconid parasitoid wasps, including host records for 219 species
    Michael J. Sharkey,     Daniel H. Janzen, Winnie Hallwachs, Eric G. Chapman,     M. Alex Smith, Tanya Dapkey,     Allison Brown, Sujeevan Ratnasingham,     Suresh Naik, Ramya Manjunath, Kate Perez, Megan Milton,     Paul Hebert,     Scott R. Shaw,     Rebecca N. Kittel,     M. Alma Solis, Mark A. Metz,     Paul Z. Goldstein, John W. Brown, Donald L. J. Quicke,     C. van Achterberg,     Brian V. Brown, John M. Burns
Part of: Minimalist revision and description of 403 new species in 11 subfamilies of Costa Rican braconid parasitoid wasps, including host records for 219 species
10.3897/zookeys.1013.55600
 02-02-2021
 Unique: 22697 | Total: 45860  | Access Period:
 Reprint: € 212,00
 1-665
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Monograph
A species-level taxonomic review and host associations of Glyptapanteles (Hymenoptera, Braconidae, Microgastrinae) with an emphasis on 136 new reared species from Costa Rica and Ecuador
    Diana Carolina Arias-Penna,     James B. Whitfield,     Daniel H. Janzen,     Winifred Hallwachs,     Lee A. Dyer,     M. Alex Smith,     Paul D.N. Hebert,     José L. Fernández-Triana
Part of: A species-level taxonomic review and host associations of Glyptapanteles (Hymenoptera, Braconidae, Microgastrinae) with an emphasis on 136 new reared species from Costa Rica and Ecuador
10.3897/zookeys.890.35786
 20-11-2019
 Unique: 8818 | Total: 17627  | Access Period:
 Reprint: € 212,00
 1-685
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Research Article
Aprica: a new genus and life history for the pteridivore Xanthia patula Druce, 1898 (Lepidoptera, Noctuidae)
    Paul Z. Goldstein,     Daniel Janzen, Winnie Hallwachs
10.3897/zookeys.866.27647
 24-07-2019
 Unique: 2851 | Total: 4034  | Access Period:
 Reprint: € 8,00
 127-145
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Research Article
A revision of Dolichogenidea (Hymenoptera, Braconidae, Microgastrinae) with the second mediotergite broadly rectangular from Area de Conservación Guanacaste, Costa Rica
    Jose Fernandez-Triana,     Caroline Boudreault, Tanya Dapkey,     M. Alex Smith, Winnie Hallwachs,     Daniel Janzen
10.3897/zookeys.835.33440
 04-04-2019
 Unique: 3214 | Total: 4822  | Access Period:
 Reprint: € 14,00
 87-123
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Research Article
Review of Lophomyra Schaus, 1911 (Lepidoptera, Noctuidae): a new combination and re-descriptions of species newly associated with ferns (Polypodiaceae)
    Paul Z. Goldstein,     Daniel H. Janzen, Benjamin Proshek, Tanya Dapkey, Winnie Hallwachs
Part of: Contributions to the Systematics of New World macro-moths VII
10.3897/zookeys.788.21235
 08-10-2018
 Unique: 3622 | Total: 5306  | Access Period:
 Reprint: € 12,00
 135-165
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Research Article
A review of Leucosigma Druce, 1908: a newly discovered case of fern-feeding and descriptions of three new species (Lepidoptera, Noctuidae)
    Paul Z. Goldstein,     Daniel H. Janzen, Benjamin Proshek, Tanya Dapkey, Winnie Hallwachs
Part of: Contributions to the Systematics of New World macro-moths VII
10.3897/zookeys.788.21222
 08-10-2018
 Unique: 3573 | Total: 5288  | Access Period:
 Reprint: € 17,00
 87-133
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Research Article
Revision of the species of Lytopylus from Area de Conservación Guanacaste, northwestern Costa Rica (Hymenoptera, Braconidae, Agathidinae)
    Ilgoo Kang, Eric G. Chapman,     Daniel H. Janzen,     Winnie Hallwachs, Tanya Dapkey,     M. Alex Smith,     Michael J. Sharkey
10.3897/zookeys.721.20287
 12-12-2017
 Unique: 4415 | Total: 7320  | Access Period:
 Reprint: € 23,00
 93-158
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Monograph
Integrative taxonomy of New World Euplectrus Westwood (Hymenoptera, Eulophidae), with focus on 55 new species from Area de Conservación Guanacaste, northwestern Costa Rica
    Christer Hansson,     M. Alex Smith,     Daniel H. Janzen,     Winnie Hallwachs
Part of: Integrative taxonomy of New World Euplectrus Westwood (Hymenoptera, Eulophidae), with focus on 55 new species from Area de Conservación Guanacaste, northwestern Costa Rica
10.3897/zookeys.485.9124
 10-03-2015
 Unique: 7239 | Total: 12929  | Access Period:
 Reprint: € 74,00
 1-236
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Monograph
A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste
Eugenie Phillips-Rodríguez, Jerry A. Powell,     Winnie Hallwachs,     Daniel H. Janzen
Part of: A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste
10.3897/zookeys.461.8377
 09-12-2014
 Unique: 5061 | Total: 8523  | Access Period:
 Reprint: € 32,00
 1-86
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