Abstract
Charles Darwin correctly predicted the existence of an extraordinarily long-tongued hawkmoth in Madagascar, based on the length of the floral spur of an Angraecum orchid. This hawkmoth, Xanthopan morganii, is also the longest-tongued hawkmoth on the African mainland, but its ecological role as a pollinator has been virtually unknown outside of Madagascar. We investigated whether X. morganii pollinates Bonatea steudneri, an orchid with floral spurs that vary from 10 to 21 cm in length among populations. At a forest locality in central Kenya, we observed X. morganii individuals with tongues ca. 16 cm in length pollinating B. steudneri plants with spurs ca. 15 cm in length. At other localities in Kenya, we observed visits by the hawkmoths Agrius convolvuli (tongue c. 12 cm) and Coelonia fulvinotata (tongue ca. 10 cm). Pollinaria of B. steudneri are attached to the eyes of hawkmoth visitors. Flowers of B. steudneri show several adaptations for hawkmoth pollination, including anthesis at dusk and nocturnal emission of scent dominated by the volatile compound linalool. This study highlights the potential for predicting certain highly specialized interactions among species by matching of their respective morphological dimensions.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
