2006

• Penz,C. & Devries, P., 2006. Systematic position of Apodemia paucipuncta (Riodinidae), and a critical evaluation of the nymphidiine transtilla. Zootaxa 1190: 1–50, 20 pls. Reference page. 

2009

• Penz, C.M. 2009: The phylogeny of Opoptera butterflies, and an assessment of the systematic position of O. staudingeri (Lepidoptera, Nymphalidae). Zootaxa 1985: 1–20. Abstract & excerpt. Reference page. 

2011

• van Nieukerken, E.J., Kaila, L., Kitching, I.J., Kristensen, N.P., Lees, D.C., Minet, J., Mitter, C., Mutanen, M., Regier, J.C., Simonsen, T.J., Wahlberg, N., Yen, S-H., Zahiri, R., Adamski, D., Baixeras, J., Bartsch, D., Bengtsson, B.A., Brown, J.W., Bucheli, S.R., Davis, D.R., de Prins, J., de Prins, W., Epstein, M.C., Gentili-Poole, P., Gielis, C., Hättenschwiler, P., Hausmann, A., Holloway, J.D., Kallies, A., Karsholt, O., Kawahara, A.Y., Koster, S., Kozlov, M.V., Lafontaine, J.D., Lamas, G., Landry, J-F., Lee, S., Nuss, M., Park, K-T., Penz, C., Rota, J., Schintlmeister, A., Schmidt, B.C., Sohn, J-C., Solis, M.A., Tarmann, G.M., Warren, A.D., Weller, S., Yaklovlev, R.V., Zolotuhin, V.V. & Zwick, A. 2011: Order Lepidoptera Linnaeus, 1758. Pp 212–221 In: Zhang, Z.-Q. (ed.) 2011. Animal biodiversity: an outline of higher-level classification and survey of taxonomic richness. Zootaxa 3148: 1–237. Open access. Reference page. . PDF Reference page. 

2014

• Penz, C.M., Alexander, L.G. & Devries, P.J. 2014: Revised species definitions and nomenclature of the rose colored Cithaerias butterflies (Lepidoptera, Nymphalidae, Satyrinae). Zootaxa 3873(5): 541–559. DOI: 10.11646/zootaxa.3873.5.5 Reference page. 

2017

• Penz, C.M., Casagrande, M.M., DeVries, P. & Simonsen, T.J. 2017. Documenting diversity in the Amazonian butterfly genus Bia (Lepidoptera, Nymphalidae). Zootaxa 4258(3): 201–237. DOI: 10.11646/zootaxa.4258.3.1 . Reference page. 

2018

• Chacón, I.A., Devries, P.J. & Penz, C.M. 2018. Description of a New Subspecies of Cunizza hirlanda (Pieridae: Anthocharidini) from Costa Rica. Journal of the Lepidopterists' Society 72(2): 121-126. Reference page. 

• Seraphim, N., Kaminski, L.A., DeVries, P.J., Penz, C.M., Callaghan, C.J., Wahlberg, N., Silva-Brandão, K.L. & Freitas, A.V.L. 2018. Molecular phylogeny and higher systematics of the metalmark butterflies (Lepidoptera: Riodinidae). Systematic Entomology 43(2): 407–425. DOI: 10.1111/syen.12282 Reference page.