Daniel Hunt Janzen

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

Department of Biology, University of Pennsylvania, Philadelphia, PA, USA
E-mail: djanzen@sas.upenn.edu

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)

2 eponyms 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.
Fernández-Triana, J.L., Whitfield, J.B., Rodriguez, J.J., Smith, M.A., Janzen, D.H., Hallwachs, W.D., Hajibabaei, M., Burns, J.M., Solis, M.A., Brown, J., Cardinal, S., Goulet, H. & Hebert, P.D.N. 2014. Review of Apanteles sensu stricto (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservación Guanacaste, northwestern Costa Rica, with keys to all described species from Mesoamerica. ZooKeys 383: 1–565. DOI: 10.3897/zookeys.383.6418 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.
Fleming, A.J., Wood, D.M., Smith, M.A., Janzen, D.H. & Hallwachs, W. 2014. A new species of Cordyligaster Macquart, reared from caterpillars in Area de Conservacion Guanacaste, northwestern Costa Rica. Biodiversity data journal, 2: e4174. DOI: 10.3897/BDJ.2.e4174 Reference page.
Fleming, A.J., Wood, D.M., Smith, M.A., Hallwachs, W. & Janzen, D.H. 2014. Revision of the New World species of Houghia Coquillett (Diptera, Tachinidae) reared from caterpillars in Area de Conservación Guanacaste, Costa Rica. Zootaxa 3858(1): 1–90. DOI: 10.11646/zootaxa.3858.1.1 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.
Núñez, R., Genaro, J. A., Pérez-Asso, A., Murillo-Ramos, L., Janzen, D. H., Hallwachs, W., Wahlberg, N. & Hausmann, A. 2020. Species delimitation and evolutionary relationships among Phoebis New World sulphur butterflies (Lepidoptera, Pieridae, Coliadinae). Systematic Entomology 45(2): 481–492. DOI: 10.1111/syen.12408 Reference page.

2021

Hansson, C., Hallwachs, W. & Janzen, D.H. 2021. New distributional, biological and taxonomic information on the genus Eulophinusia Girault (Hymenoptera: Eulophidae). Zootaxa 5047(3): 370–376. DOI: 10.11646/zootaxa.5047.3.8 full article pdf Reference page.
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.
Fleming, A.J., Woodley, N.E., Smith, M.A., Hallwachs, W., Janzen, D.H. 2023. Revision of Belvosia Robineau-Desvoidy (Diptera, Tachinidae) and 33 new species from Area de Conservación Guanacaste in northwestern Costa Rica with a key to known North and Mesoamerican species. Biodiversity Data Journal 11: e103667. DOI: 10.3897/BDJ.11.e103667 . 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.

2025

Fernandez-Triana, J.L., Boudreault, C., Whitfield, J.B., Höcherl, A., Smith, M.A., Hallwachs, W. & Janzen, D.H. 2025. A revision of the parasitoid wasp genus Dolichogenidea Viereck (Hymenoptera, Braconidae) in the Neotropical region, with the description of 102 new species. ZooKeys 1237: 1–250. DOI: 10.3897/zookeys.1237.141007 Reference page.

2026

Sapkota, A., Orellana-Borges, A.M., Grishin, N.V., Chacón Gamboa, I.A., Janzen, D.H., Hallwachs, W., Song, L., Kc, S. & Willmott, K.R. 2026. Revisiting Colobura (Lepidoptera: Nymphalidae): Using integrative taxonomy to identify a new species, C. cryptica sp. nov., and revise geographic boundaries. Zootaxa 5802(2): 303–322. DOI: 10.11646/zootaxa.5802.2.4. Reference page.
Espinoza-Sanabria, B.A., Laguerre, M., Janzen, D.H. & Hallwachs, W. 2026. Revision of the Pseudohemihyalea species from Costa Rica (Erebidae Arctiinae Arctiini Phaegopterina) with description of new taxa, as well as redescription and delimitation of species previously described in the genus and present in the country. Faunitaxys 14(51): 1–37. PDF Reference page.