Daniel Hunt Janzen

Daniel Hunt Janzen

Daniel Hunt Janzen (born 1939), U.S. entomologist.

• Department of Biology, University of Pennsylvania, Philadelphia, PA, USA

IPNI standard form: D.H.Janzen

Taxon names authored

(List may be incomplete)

• 1 taxon names authored by Daniel Hunt Janzen

Eponyms

(List may be incomplete)

• 1 eponym of Daniel Hunt Janzen

Publications

(List may be incomplete)

1999

• Burns, J.M. & Janzen, D.H. 1999. Drephalys: Division of this showy neotropical genus, plus a new species and the immatures and food plants of two species from Costa Rican dry forest (Hesperiidae: Pyrginae). Journal of the Lepidopterists' Society 53(3): 77-89. Reference page. 

2000

• Solis, M.A., Sullivan, J.J. & Janzen, D.H. 2000. Cromarcha stroudagnesia, a new chrysaugine species boring in shoots of Tabebuia ochracea (Bignoniaceae) in a Costa Rica dry forest (Lepidoptera: Pyralidae: Chrysauginae). Tropical Lepidoptera Research 11(1-2): 33–39. Full article (PDF) Reference page. 

2001

• Burns, J.M. & Janzen, D.H. 2001. Biodiversity of Pyrrhopygine Skipper Butterflies (Hesperiidae) in the Area de Conservacion Guanacaste, Costa Rica. Journal of the Lepidopterists' Society 55: 15–43, 28 figs. web. Reference page. 

2005

• Burns, J.M. & Janzen, D.H. 2005. What's in a name? Lepidoptera: Hesperiidae: Pyrginae: Telemiades Hübner 1819 [Pyrdalus Mabille 1903]: new combinations Telemiades corbulo (Stoll) and Telemiades oiclus (Mabille)—and more. Proceedings of the Entomological Society of Washington 107(4): 770–781. ResearchGate. Reference page. 
• Burns, J.M. & Janzen, D.H. 2005. Pan-Neotropical genus Venada (Hesperiidae: Pyrginae) is not monotypic: Four new species occur on one volcano in the area de conservación guanacaste, Costa Rica. Journal of the Lepidopterists' Society 59 (1): 19-34. Reference page. 

2010

• Burns, J.M., Janzen, D.H. & Hallwachs, W., 2010. Of many similar species in the neotropical genus Porphyrogenes (Lepidoptera: Hesperiidae), a new one, repeatedly reared in Costa Rica, is relatively distinct. Proceedings of the Entomological Society of Washington 112 (1): 32-42. Reference page. 

2011

• Sharkey, M.J., Clutts, S., Tucker, E.M., Janzen, D., Hallwachs, W., Dapkey, T. & Smith, M.A. 2011. Lytopylus Förster (Hymenoptera, Braconidae, Agathidinae) species from Costa Rica, with an emphasis on specimens reared from caterpillars in Area de Conservación Guanacaste. ZooKeys 130: 379–419. DOI: 10.3897/zookeys.130.1569 . Reference page. 

2012

• Whitfield, J.B., Fernández-Triana, J.L., Janzen, D.H., Hallwachs, W, Smith, M.A. & Cardinal, S. 2012. Mariapanteles (Hymenoptera, Braconidae), a new genus of Neotropical microgastrine parasitoid wasp discovered through biodiversity inventory. ZooKeys 208: 61-80. DOI: 10.3897/zookeys.208.3326 . Reference page. 

2013

• Arias-Penna, D.C., Whitfield, J.B., Janzen, D.H. & Hallwachs, W. 2013. Three new species in the genus Wilkinsonellus (Braconidae, Microgastrinae) from the Neotropics, and the first host record for the genus. ZooKeys 302: 79–95. DOI: 10.3897/zookeys.302.4962 Reference page. 
• Brown, J.W., Janzen, D.H. & Hallwachs, W. 2013. A food plant specialist in Sparganothini: A new genus and species from Costa Rica (Lepidoptera, Tortricidae). ZooKeys, 303: 53–63. DOI: 10.3897/zookeys.303.5230 . Reference page. 
• Burns, J.M., Janzen, D.H., Hallwachs, W. & Hajibabaei M. 2013a. DDNA Barcodes Reveal Yet Another New Species of Venada (Lepidoptera: Hesperiidae) in Northwestern Costa Rica. Proceedings of the Entomological Society of Washington 115(1): 37–47. Reference page. 
• Chacón, I.A., Janzen, D.H., Hallwachs, W., Sullivan, J.B. & Hajibabaei, M. 2013. Cryptic species within cryptic moths: new species of Dunama Schaus (Notodontidae, Nystaleinae) in Costa Rica. ZooKeys 64: 11–45. DOI: 10.3897/zookeys.264.4440 Reference page. 
• Espinoza, B.A., Janzen, D.H., Hallwachs, W. & Sullivan, J.B. 2013: Description of a new species and subspecies of Idalus Walker from Costa Rica, Honduras and Guatemala (Lepidoptera, Erebidae, Arctiinae, Arctiini). ZooKeys, 264: 71–84. DOI: 10.3897/zookeys.264.4403 Reference page. 
• Smith, D.R., Janzen, D.H. & Hallwachs, W. 2013. Food plants and life histories of sawflies of the families Argidae and Tenthredinidae (Hymenoptera) in Costa Rica, a supplement. Journal of Hymenoptera Research 35: 17–31. DOI: 10.3897/JHR.35.5496 Reference page. 

2014

• Bertrand, C., Janzen, D.H., Hallwachs, W., Burns, J.M., Gibson, J.F., Shokralla, S. & Hajibabaei, M. 2014. Mitochondrial and nuclear phylogenetic analysis with Sanger and next-generation sequencing shows that, in Área de Conservación Guanacaste, northwestern Costa Rica, the skipper butterfly named Urbanus belli (family Hesperiidae) comprises three morphologically cryptic species. BMC Evolutionary Biology 14:153. DOI: 10.1186/1471-2148-14-153 Reference page. 
• Chacón, I.A., Janzen, D.H. & Hallwachs, W. 2014. Four new species of Symmerista Hübner, 1816 (Notodontidae, Nystaleinae) from Costa Rica. ZooKeys 421: 39–63. DOI: 10.3897/zookeys.421.6342 Reference page. 
• Fernández-Triana, J., Janzen, D., Hallwachs, W., Whitfield, J.B., Smith, M.A. & Kula, R. 2014. Revision of the genus Pseudapanteles (Hymenoptera, Braconidae, Microgastrinae), with emphasis on the species in Area de Conservación Guanacaste, northwestern Costa Rica. ZooKeys, 446: 1–82. DOI: 10.3897/zookeys.446.8195 . Reference page. 
• Fernandez-triana, J.L., Whitfield, J.B., Smith, M.A., Hallwachs, W. & Janzen, D.H. 2014. First record of the genus Venanus (Hymenoptera: Braconidae: Microgastrinae) in Mesoamerica, with the description of two new species from Costa Rica. Biodiversity Data Journal 2: e4167. DOI: 10.3897/BDJ.2.e4167 . Reference page. 
• Grishin, N.V., Janzen, D.H. & Hallwachs, W. 2014. A new species of Eracon (Hesperiidae: Pyrginae) substantiated by a number of traits, including female genitalia. Journal of the Lepidopterists’ Society 68(3): 149–161. DOI: 10.18473/lepi.v68i3.a1. . Reference page. 

2015

• Fernandez-Triana, J.L., Whitfield, J.B., Smith, M.A., Kula, R.R., Hallwachs, W. & Janzen, D.H. 2015. Revision of the genera Microplitis and Snellenius (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservacion Guanacaste, Costa Rica, with a key to all species previously described from Mesoamerica. Deutsche Entomologische Zeitschrift 62(2): 137–201. DOI: 10.3897/dez.62.5276. Reference page. 
• Fleming, A.J., Wood, D.M., Janzen, D.H., Hallwachs, W. & Smith, M.A. 2015. Seven new species of Spathidexia Townsend (Diptera: Tachinidae) reared from caterpillars in Area de Conservación Guanacaste, Costa Rica. Biodiversity Data Journal 3: e4597. DOI: 10.3897/BDJ.3.e4597. Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Hallwachs, W. & Janzen, D. 2015. Three new species of Ametadoria Townsend (Diptera: Tachinidae) from Area de Conservación Guanacaste, Costa Rica. Biodiversity Data Journal 3: e5039. DOI: 10.3897/BDJ.3.e5039 . Reference page. 
• Fleming, A.J., Wood, D.M., Janzen, D.H., Hallwachs, W. & Smith, M.A. 2015. Three new species of Trigonospila Pokorny (Diptera: Tachinidae), from Area de Conservación Guanacaste, northwestern Costa Rica, with a key for their identification. Biodiversity Data Journal 3: e4595. DOI: 10.3897/BDJ.3.e4595. Reference page. 
• Fleming, A.J., Wood, D.M., Janzen, D.H., Hallwachs, W. & Smith, M.A. 2015. Corrigendum: Three new species of Trigonospila Pokorny (Diptera: Tachinidae), from Area de Conservación Guanacaste, northwestern Costa Rica, with a key for their identification. Biodiversity Data Journal 3: e6459. DOI: 10.3897/BDJ.3.e6459. Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Janzen, D.H. & Hallwachs, W. 2015. Nine new species of Itaplectops (Diptera: Tachinidae) reared from caterpillars in Area de Conservación Guanacaste, northwestern Costa Rica, with a key to Itaplectops species. Biodiversity Data Journal 3: e4596. DOI: 10.3897/BDJ.3.e4596. Reference page. 
• Grishin, N.V., Janzen, D.H. & Hallwachs, W. 2015: A cryptic new Potamanaxas (Hesperiidae: Pyrginae: Erynnini) stands out by terminally elongated genitalic valvae. The Journal of Research on the Lepidoptera 48: 13–20. full article.Reference page. 
• Hansson, C., Smith, M.A., Janzen, D.H. & Hallwachs, W. 2015. Integrative taxonomy of New World Euplectrus Westwood (Hymenoptera, Eulophidae), with focus on 55 new species from Area de Conservación Guanacaste, northwestern Costa Rica. ZooKeys, 485: 1–236. DOI: 10.3897/zookeys.458.9124Reference page. 
• Nakahari, S., Janzen, D.H., Hallwachs, W. & Espeland, M. 2015. Description of a new genus for Euptychia hilara (C. Felder & R. Felder, 1867) (Lepidoptera: Nymphalidae: Satyrinae). Zootaxa 4012(3): 525–541. DOI: 10.11646/zootaxa.4012.3.7. Preview (PDF) Reference page. 
• Sharkey, M.J., Chapman, E.G., Janzen, D.H., Hallwachs, W. & Smith, M.A. 2015. Revision of Aphelagathis (Hymenoptera, Braconidae, Agathidinae, Agathidini). Zootaxa 4000(1): 73–89. DOI: 10.11646/zootaxa.4000.1.3. Preview (PDF) Reference page. 
• Sourakov, A., Plotkin, D., Kawahara, A.Y., Xiao, L., Hallwachs, W. & Janzen, D.H. 2015. On the taxonomy of the erythrina moths Agathodes and Terastia (Crambidae: Spilomelinae): Two different patterns of haplotype divergence and a new species of Terastia. Tropical Lepidoptera Research 25(2): 80–97. Reference page. 
• Wang, H., Wahlberg, N., Holloway, J.D., Bergsten, J., Fan, X., Janzen, D.H., Hallwachs, W., Wen, L., Wang, M. & Nylin, S. 2015. Molecular phylogeny of Lymantriinae (Lepidoptera, Noctuoidea, Erebidae) inferred from eight gene regions. Cladistics 31(6): 579–592. DOI: 10.1111/cla.12108 Reference page. 

2016

• Fernandez-Triana, J.L., Whitfield, J.B., Smith, M.A., Dapkey, T., Hallwachs, W. & Janzen, D.M. 2016. Review of the world species of Exoryza (Hymenoptera, Braconidae, Microgastrinae), with description of five new species. Deutsche Entomologische Zeitschrift 63(2): 195–210. DOI: 10.3897/dez.63.8977. Reference page. 
• Fernandez-Triana, J.L., Boudreault, C., Dapkey, T., Smith, M.A., Rodriguez, J., Hallwachs, W. & Janzen, D.H. 2016. Revision of the genus Promicrogaster (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservación Guanacaste, Costa Rica, with a key to all species previously described from Mesoamerica. Journal of Hymenoptera Research 50: 25–79. DOI: 10.3897/JHR.50.8220. Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Janzen, D.H., Hallwachs, W. & Dapkey, T. 2016. A new species of Phosocephala Townsend, 1908 (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity data journal 4: e7863. DOI: 10.3897/BDJ.4.e7863 Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Hallwachs, W., Janzen, D. & Dapkey, T. 2016. Two new species of Erythromelana Townsend, 1919 (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal 4: e7386. DOI: 10.3897/BDJ.4.e7386. Reference page. 

2017

• Regier, J.C., Mitter, C., Mitter, K., Cummings, M.P., Bazinet, A.L., Hallwachs, W., Janzen, D.H. & Zwick, A. 2017. Further progress on the phylogeny of Noctuoidea (Insecta: Lepidoptera) using an expanded gene sample. Systematic Entomology 42(1): 82–93. DOI: 10.1111/syen.12199 Reference page. 
• Chacón, I.A., Janzen, D.H., Hallwachs, W., Dapkey, T., Harvey, D.J. & Grishin, N.V. 2018. Six new cryptic species of Xylodonta Becker, 2014 (Notodontidae: Nystaleinae) from Costa Rica. Tropical Lepidoptera Research 27(1): 33-58. full article (PDF). Reference page. 
• Espinoza, B.A., Janzen, D.H. & Hallwachs, W. 2017. 17 new species hiding in 10 long-named gaudy tropical moths (Lepidoptera: Erebidae, Arctiinae). Tropical Lepidoptera Research 27(suppl. 1): 1-29. full article (PDF). Reference page. 
• Espinoza-Sanabria, B.A., Laguerre, M., Sullivan, J.B., Janzen, D.H. & Hallwachs, W. 2017. Description of a new genus and three new species of Erebidae, from Central and South America (Lepidoptera, Arctiinae, Arctiini). Tropical Lepidoptera Research 27(2): 62-70. full article (PDF). Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Hallwachs, W., Janzen, D. & Dapkey, T. 2017. Nine new species of Uramya Robineau-Desvoidy (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica, with a key to their identification. Biodiversity Data Journal 5: e9649. DOI: 10.3897/BDJ.5.e9649. Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Dapkey, T., Hallwachs, W. & Janzen, D.H. 2017. Five new species of Vibrissina Rondani (Diptera: Tachinidae) from Area de Conservación Guanacaste in Northwestern Costa Rica. Biodiversity Data Journal 5: e10967. DOI: 10.3897/BDJ.5.e10967. Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Dapkey, T., Hallwachs, W. & Janzen, D. 2017. A new species of Voria Robineau-Desvoidy (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal 5: e20123. DOI: 10.3897/BDJ.5.e20123. Reference page. 
• Heikkilä, M., Metz, M.A., Hallwachs, W. & Janzen, D.H. 2017. Three New Species of Rectiostoma Becker, 1982 (Lepidoptera: Gelechioidea: Depressariidae) from Area De Conservación Guanacaste, Northwestern Costa Rica. Proceedings of the Entomological Society of Washington 119(1): 47–62. DOI: 10.4289/0013-8797.119.1.47 Reference page. 
• Janzen, D.H., Burns, J.M., Cong. Q., Hallwachs, W., Dapkey, T., Manjunath, R., Hajibabaei M., Hebert, P.D.N. & Grishin, N.V. 2017. Nuclear genomes distinguish cryptic species suggestedby their DNA barcodes and ecology. PNAS 114(31): 8313–8318. DOI: 10.1073/pnas.1621504114. PDF. SI Appendix. Reference page. 
• Kang, I., Chapman, E.G., Janzen, D.H., Hallwachs, W., Dapkey, T., Smith, M.A. & Sharkey, M.J. 2017. Revision of the species of Lytopylus from Area de Conservación Guanacaste, northwestern Costa Rica (Hymenoptera, Braconidae, Agathidinae). ZooKeys 721: 93–158. DOI: 10.3897/zookeys.721.20287. Reference page. 
• Metz, M.A., Janzen, D.H. & Hallwachs, W. 2017. Descriptions of Four New Species of Struthoscelis Meyrick (Lepidoptera: Oecophoridae: Oecophorinae), One from Area De Conservación Guanacaste, Northwestern Costa Rica, Providing the First Known Biology for the Genus, and Discovery of a Novel Wing Morphology in Males. Proceedings of the Entomological Society of Washington 119(3): 442-458. DOI: 10.4289/0013-8797.119.3.442 Reference page. 

2018

• Fleming, A.J., Wood, D.M., Smith, M.A., Hallwachs, W. & Janzen, D.H. 2018. Revision of the Mesoamerican species of Calolydella Townsend (Diptera: Tachinidae) and description of twenty-three new species reared from caterpillars in Area de Conservación Guanacaste, northwestern Costa Rica. Biodiversity Data Journal 6: e11223. DOI: 10.3897/BDJ.6.e11223. Reference page. 
• Goldstein, P.Z., Janzen, D.H., Proshek, B., Dapkey, T. & Hallwachs, W. 2018. A review of Leucosigma Druce, 1908: a newly discovered case of fern-feeding and descriptions of three new species (Lepidoptera, Noctuidae). Pp 87–133 In
• Schmidt, B.C. & Lafontaine, J.D. (eds.) 2018. Contributions to the systematics of New World macro-moths VII. ZooKeys 788: 1–252. DOI: 10.3897/zookeys.788.30148 Reference page. . DOI: 10.3897/zookeys.788.21222 Reference page. 
• Goldstein, P.Z., Janzen, D.H., Proshek, B., Dapkey, T. & Hallwachs, W. 2018. Review of Lophomyra Schaus, 1911 (Lepidoptera, Noctuidae): a new combination and re-descriptions of species newly associated with ferns (Polypodiaceae). Pp 135–165 In
• Schmidt, B.C. & Lafontaine, J.D. (eds.) 2018. Contributions to the systematics of New World macro-moths VII. ZooKeys 788: 1–252. DOI: 10.3897/zookeys.788.30148 Reference page. . DOI: 10.3897/zookeys.788.21235 Reference page. 

2019

• Arias-Penna, D., Whitfield, J.B., Janzen, D.H., Hallwachs, W., Dyer, L.A., Smith, M.A., Hebert, P.D.N. & Fernández-Triana, J.L. 2019. 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. ZooKeys, 890: 1–685. DOI: 10.3897/zookeys.890.35786 Reference page. 
• Burns, J.M., Janzen, D.H., Hallwachs, W. & Grishin, N.V. 2019. Monotypy Justified: Genitalia and DNA Move Ephyriades eugramma (Mabille) to New Genus Neomorphuncus Burns (Lepidoptera: Hesperiidae: Pyrginae). Proceedings of the Entomological Society of Washington 121(4): 557–567. DOI: 10.4289/0013-8797.121.4.557 Reference page. 
• Fernandez-Triana, J.L., Boudreault, C., Dapkey, T., Smith, M.A., Hallwachs, W. & Janzen, D.H. 2019. A revision of Dolichogenidea (Hymenoptera, Braconidae, Microgastrinae) with the second mediotergite broadly rectangular from Area de Conservación Guanacaste, Costa Rica. Zookeys, 835: 87–123. DOI: 10.3897/zookeys.835.33440 Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Dapkey, T., Hallwachs, W. & Janzen, D. 2019. A new species of Trismegistomya Reinhard (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal, 7: e29130. DOI: 10.3897/BDJ.7.e29130 Reference page. 
• Fleming, A.J., Wood, D.M., Smith, M.A., Dapkey, T., Hallwachs, W. & Janzen, D.H. 2019. Twenty-two new species in the genus Hyphantrophaga Townsend (Diptera: Tachinidae) from Area de Conservación Guanacaste, with a key to the species of Mesoamerica. Biodiversity Data Journal, 7: e29553. DOI: 10.3897/BDJ.7.e29553 Reference page. 
• Goldstein, P.Z., Janzen, D.H. & Hallwachs, W. 2019. Aprica: a new genus and life history for the pteridivore Xanthia patula Druce, 1898 (Lepidoptera, Noctuidae). ZooKeys 866: 127-145. DOI: 10.3897/zookeys.866.27647 Reference page. 
• Li, W., Cong. Q., Shen, J.H., Zhang, J., Hallwachs, W., Janzen, D.H. & Grishin, N.V. 2019. Genomes of skipper butterflies reveal extensive convergence of wing patterns. PNAS 116(13): 6232–6237. DOI: 10.1073/pnas.1821304116. Text. SI Appendix. Reference page. 
• Meierotto, S., Sharkey, M.J., Janzen, D.H., Hallwachs, W., Hebert, P.D.N., Chapman, E.G. & Smith, M.A. 2019. A revolutionary protocol to describe understudied hyperdiverse taxa and overcome the taxonomic impediment. Deutsche Entomologische Zeitschrift 66: 119–145. DOI: 10.3897/dez.66.34683 . Reference page. 
• Sharkey, M.J., Penteado-Dias, A.M., Smith, M.A., Hallwachs, W. & Janzen, D. 2019. Synopsis of New World Sigalphinae (Hymenoptera, Braconidae) with the description of two new species and a key to genera. Journal of Hymenoptera Research, 68: 1–11. DOI: 10.3897/jhr.68.30131 Reference page. 

2020

• Metz, M.A., Hallwachs, W. & Janzen, D.H. 2020. Four new gelechioid species to honor Costa Rica's conservation of wild biodiversity (Lepidoptera). Zootaxa 4810(1): 045–064. DOI: 10.11646/zootaxa.4810.1.2 Reference page. 
• Solis, M.A., Phillips-Rodríguez, E., Hallwachs, W., Dapkey, T. & Janzen, D.H. 2020. Asturodes Amsel (Lepidoptera: Crambidae: Spilomelinae): Three New Species from the Western Hemisphere and Food Plant Records from Area de Conservación Guanacaste, Costa Rica. Proceedings of the Entomological Society of Washington 122(1): 147–171. DOI: 10.4289/0013-8797.122.1.147 Reference page. 

2021

• Phillips-Rodríguez, E., Brown, J.W., Hallwachs, W. & Janzen, D.H. 2021. Chlamydastis Meyrick of Costa Rica: barcodes, biology, and descriptions of 36 new species (Lepidoptera: Depressariidae). Insecta Mundi 0868: 1–96. PDF. Reference page. 
• Sharkey, M.J., Baker, A., McCluskey, K., Smith, A., Naik, S., Ratnasingham, S., Manjunath, R., Perez, K., Sones, J., D'Souza, M., St. Jacques, B., Hebert, P., Hallwachs, W. & Janzen, D. 2021. Addendum to a minimalist revision of Costa Rican Braconidae: 28 new species and 23 host records. ZooKeys 1075ː 77–136. DOI: 10.3897/zookeys.1075.72197 Reference page. 
• Sharkey, M.J., Janzen, D.H., Hallwachs, W., Chapman, E.G., Smith, M.A., Dapkey, T., Brown, A., Ratnasingham, S., Naik, S., Manjunath, R., Perez, K., Miltom, M., Hebert, P., Shaw, S.R., Kittel, R.N., Solis, M.A., Metz, M.A., Goldstein, P.Z., Brown, J.W., Quicke, D.L.J., van Achterberg, C., Brown, B.V. & Burns, J.M. 2021. Minimalist revision and description of 403 new species in 11 subfamilies of Costa Rican braconid parasitoid wasps, including host records for 219 species. ZooKeys 1013: 1–665. DOI: 10.3897/zookeys.1013.55600. . Reference page. 

2022

• Burns, J.M., Janzen, D.H., Hallwachs, W. & Grishin, N.V. 2022. Going for a Ridens Evans (Lepidoptera: Hesperiidae: Eudaminae): A New Species Reared in Area De Conservacion Guanacaste, Northwestern Costa Rica. Proceedings of the Entomological Society of Washington 124(4): 721-734. DOI: 10.4289/0013-8797.124.4.721. . Reference page. 
• Chacón, I.A., Janzen, D.H. & Hallwachs, W. 2022. Seventeen cryptic new species of Nystalea Guenée, 1852 (Notodontidae: Nystaleinae) from Costa Rica. Tropical Lepidoptera Research 32(Supplement 3): 1-104. DOI: 10.5281/ zenodo.7418826. Reference page. 
• Goldstein, P.Z., Janzen, D.H., Hallwachs, W. & Proshek, B. 2022. New species in Rejectaria Guenée (Lepidoptera: Erebidae: Herminiinae) with a focus on the Cyclanthaceae-feeders. Zootaxa 5087(3): 451–483. DOI: 10.11646/zootaxa.5087.3.4. . Reference page. 
• Solis, M.A., Alvarado, J.V., Phillips-Rodriguez, E., Halwachs, W. & Janzen, D.H. 2022. Cacographis (Lederer, 1863) of Costa Rica Feeding on Araceae: Species Identity, Biology, and Larval Description (Lepidoptera: Crambidae: Midilinae). Proceedings of the Entomological Society of Washington 124(4): 860-872. DOI: 10.4289/0013-8797.124.4.860. . Reference page. 

2023

• Fernández-Triana, J.L., Shimbori, E.M., Whitfield, J.B., Penteado-Dias, A.M., Shaw, S.R., Boudreault, C., Sones, J., Perez, K., Brown, A., Manjunath, R., Burns, J.M., Hebert, P.D.N., Smith, M.A., Hallwachs, W. & Janzen, D.H. 2023. A revision of the parasitoid wasp genus Alphomelon Mason with the description of 30 new species (Hymenoptera, Braconidae). Zookeys 1175ː 5–162. DOI: 10.3897/zookeys.1175.105068 Reference page. 
• Laguerre, M., Espinoza-Sanabria, B.A., Janzen, D.H. & Hallwachs, W. 2023. Revision of the genus Cloesia Hampson, 1900: description of five new species and recombination of two species (Noctuoidea Erebidae Arctiinae Lithosiini). Faunitaxys 11(47): 1-21. Reference page. 

2024

• Solis, M.A., Cock, M.J.W., Janzen, D.H. & Halwachs, W. 2024. New World Orphanostigma Guenée, 1854, including a new species from Costa Rica (Lepidoptera: Crambidae: Spilomelinae). Zootaxa 5471(3): 383–390. DOI: 10.11646/zootaxa.5471.3.8. . Reference page.