Authors: Krenn, HW Zulka, KP Gatschnegg, T

Citation: Hw. Krenn et al., Proboscis morphology and food preferences in nymphalid butterflies (Lepidoptera : Nymphalidae), J ZOOL, 254, 2001, pp. 17-26

Authors: Penz, CM Krenn, HW

Citation: Cm. Penz et Hw. Krenn, Behavioral adaptations to pollen-feeding in Heliconius butterflies (Nymphalidae, Heliconiinae): An experiment using Lantana flowers, J INSECT B, 13(6), 2000, pp. 865-880

Authors: Szucsich, NU Krenn, HW

Citation: Nu. Szucsich et Hw. Krenn, Morphology and function of the proboscis in Bombyliidae (Diptera, Brachycera) and implications for proboscis evolution in Brachycera, ZOOMORPHOL, 120(2), 2000, pp. 79-90

Authors: Krenn, HW Kristensen, NP

Citation: Hw. Krenn et Np. Kristensen, Early evolution of the proboscis of Lepidoptera (Insecta): external morphology of the galea in basal glossatan moths lineages, with remarks on the origin of the pilifers, ZOOL ANZ, 239(2), 2000, pp. 179-196

Authors: Krenn, HW

Citation: Hw. Krenn, Proboscis musculature in the butterfly Vanessa cardui (Nymphalidae, Lepidoptera): settling the proboscis recoiling controversy, ACT ZOOL, 81(3), 2000, pp. 259-266

Authors: Krenn, HW Penz, CM

Citation: Hw. Krenn et Cm. Penz, Mouthparts of Heliconius butterflies (Lepidoptera : Nymphalidae): A searchfor anatomical adaptations to pollen-feeding behavior, INT J INSEC, 27(4), 1998, pp. 301-309