Friedemannia messelensis was named by Collinson et al. (2012) [Fruit single-seeded, mature length 17.4– 25.8 mm, width 8.0–12.6 mm (n = 12), immature length 9.2 mm, width 4.0 mm (n = 1), frequently with persistent calyx, rarely seen in process of detachment of calyx, and commonly encountered lacking the calyx. Calyx of two whorls each of three segments, fibrous and longitudinally striate, covering one third to a quarter of the whole fruit, calyx length 6.1–7.7 mm, width 5.8–7.6 mm (n = 5).]. It is not extant. Its type specimen is Holotype SM.B Me 2135, a seed/fruit. It is the type species of Friedemannia.