I'm an undergraduate student at the University of Manchester. For my final year project I'm going to try to compare sexual size dimorphism and male-male behaviour in all four species of the genus Gromphadorhina. We already have a population of G. portentosa in the labs at Manchester and I think I've found a source for G. oblongata but I'm having real trouble finding places to purchase adult G. grandidieri and G. picea. I thought this would a be a great place to ask!
Thanks,
Roberto