by their possession of four calyx lobes rather than two. The genus has now been subsumed into Utricularia. The genus Biovularia contained the species Biovularia olivacea (also known as B. brasiliensis or B. minima) and Biovularia cymbantha. The genus has been subsumed into Utricularia. Phylogenetics The following cladogram shows the relationship between various subgenera and sections. It summarizes the results of two studies (Jobson et al. 2003; Müller et al. 2004), following Müller et al. 2006. Since the sections Aranella and Vesiculina are polyphyletic, they show up multiple times in the cladogram (*). Some monotypic sections have not been included in the study, so that their place in this system is unclear. Sections that are not included below are Candollea, Chelidon, Choristothecae, Kamienskia, Martinia, Meionula, Mirabiles, Oliveria, Setiscapella, Sprucea, Steyermarkia, and Stylotheca in subgenus Utricularia; Minutae in subgenus Bivalvaria; and Tridentaria in subgenus Polypompholyx. References External links The International Carnivorous Plant Society Utricularia Botanical Society of America, Utricularia - the Bladderworts Article in Wired magazine featuring video of the plant trapping its food Inner World of Utricularia from the John Innes Centre Lamiales genera