J.  Farminhão, Savignac, M., Droissart, V., Lowry_II, P. P., Rajaonarivelo, N., Rajaonarivelo, B., Verlynde, S., Todivelo, A., and Stévart, T., ?A new orchid species expands Darwin?s predicted pollination guild in Madagascar?, Current Biology, vol. 34, pp. R189-R190, 2024.

M. G.  Balducci, Martins, D. J., and Johnson, S. D., ?Pollination of the long-spurred African terrestrial orchid Bonatea steudneri by long-tongued hawkmoths, notably Xanthopan morganii?, Plant Systematics and Evolution, vol. 305, pp. 765-775, 2019.

J.  Minet, Basquin, P., Haxaire, J., Lees, D. C., and Rougerie, R., ?A new taxonomic status for Darwin's "predicted" pollinator: Xanthopan praedicta stat. nov. (Lepidoptera Sphingidae Sphinginae)?, Antenor, vol. 8, no. 1, pp. 69-86, 2021.

C.  Netz and Renner, S. S., ?Long-spurred Angraecum orchids and long-tongued sphingid moths on Madagascar: a time frame for Darwin?s predicted Xanthopan/Angraecum coevolution?, Biological Journal of the Linnean Society, vol. 122, no. 2, pp. 469-478, 2017.

G. W.  Beccaloni, ?Wallace's moth and Darwin's orchid?, 2017. .

L. T.  Wasserthal, ?Angraecum-Orchideen und langrüsslige Schwärmer, Bestäubung und Evolution?, Die Orchideen, vol. 66, no. 3, pp. 175-181, 2015.

L. T.  Wasserthal, ?Evolution of long-tongued hawkmoths and pollination of long-spurred Angraecum orchids?, 20th World Orchid Conference. pp. 280-284, 2013.

L. T.  Wasserthal, ?Deep flowers for long tongues?, Trends in Ecology and Evolution, vol. 13, no. 11, pp. 459-460, 1998.

L. T.  Wasserthal, ?The pollinators of the Malagasy Star Orchids Angraecum sesquipedale, A. sororium and A. compactum and the evolution of extremely long spurs by pollinator shift?, Botanica Acta, vol. 110, no. 5, pp. 343-359, 1997.

L. T.  Wasserthal, ?Of hawkmoth species with long "tongues". Tropical biocenoses?, German Research. Reports of the Deutsche Forschungsgemeinschaft, vol. 1996, pp. 22-24, 1996.

L. T.  Wasserthal, ?Swing-hovering combined with long tongue in hawkmoths, an antipredator adaptation during flower visits. Pp. 77-87 in?, in Animal-plant interactions in tropical environments, W.  Barthlott, Naumann, C. M., Schmidt-Loske, K., and Schuchmann, K. L., Eds. Bonn: Zoologisches Forschungsinstitut und Museum Alexander Koenig, 1993, p. 227.

E.  Staller, ?Long-spurred orchids and their pollinators - an investigation into multiple hypotheses to explain some of Darwin's contrivances?, The Open University, 2013.

L. A.  Nilsson, ?Deep flowers for long tongues?, Trends in Ecology and Evolution, vol. 13, no. 7, pp. 259-260, 1998.

C.  Micheneau, Johnson, S. D., and Fay, M. F., ?Orchid pollination: from Darwin to the present day?, Botanical Journal of the Linnean Society of London, vol. 161, pp. 1-19, 2009.

G.  Kritsky, ?Darwin's Madagascan hawk moth prediction?, American Entomologist, vol. 37, no. 4, pp. 206-210, 1991.

P.  Denso, ?Einzeldarstellungen zu madagassischen Schmetterlingen?, Deutsche Entomologische Zeitschrift, Iris, vol. 57, pp. 102-126, 1944.

J.  Arditti, Elliott, J., Kitching, I. J., and Wasserthal, L. T., ?'Good Heavens what insect can suck it' - Charles Darwin, Angraecum sesquipedale and Xanthopan morganii praedicta?, Botanical Journal of the Linnean Society of London, vol. 169, pp. 403-432, 2012.