Futabanthus asamigawaensis Mas.Takah., E.M.Friis, Uesugi, Yosh.Suzuki et P.R.Crane

Plant Fossil Names Registry Number: PFN002802

Act LSID: urn:lsid:plantfossilnames.org:act:2802

Authors: M. Takahashi, E. M. Friis, K. Uesugi, Y. Suzuki & P. R. Crane

Rank: species

Genus: Futabanthus Mas.Takah., E.M.Friis, Uesugi, Yosh.Suzuki et P.R.Crane

Reference: Takahashi, M., Friis, E. M., Uesugi, K., Suzuki, Y. & Crane, P. R. (2008): Floral Evidence of Annonaceae from the Late Cretaceous of Japan. – International Journal of Plant Sciences 169(7): 908–917.

Page of description: 909

Illustrations or figures: figs 1–3

Name is type for

Futabanthus Mas.Takah., E.M.Friis, Uesugi, Yosh.Suzuki et P.R.Crane 2008


Original diagnosis/description

Floral receptacle decreasing in thickness toward the rim, where it bears several robust tepals. Androecium consisting of ~90–100 densely crowded stamens, arranged in about five or six series on the floral receptacle. Staminodes lacking. Innermost parts of androecium overarching and partly obscuring the gynoecium. Gynoecium composed of ~100–120 free carpels.


From geologic occurrence of the material in the Asamigawa Formation.


Cretaceous, Upper Cretaceous, Coniacian
Asamigawa Member, Ashizawa Formation, Futaba Group; early Coniacian


Along a tributary of the Kitaba River in Kamikitaba, Hirono-machi (study route B of Ando et al. [1995]; 37°12′N, 140°57′E)

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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