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

Plant Fossil Names Registry Number: PFN002801

Act LSID: urn:lsid:plantfossilnames.org:act:2801

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

Rank: genus

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

Type

Original diagnosis/description

Flower small, pedicellate, bisexual, actinomorphic, hypogynous, and multipartite. Floral receptacle disk shaped and slightly concave, with a small central conical projection. Perianth composed of tepals arranged in more than one series or whorl on the rim of the receptacle. Androecium multistaminate. Stamens curved toward the center of the flower, not clearly differentiated into anther and filament. Anther extending for most of the length of the stamen, the two thecae lateral and displaced toward the abaxial surface of the stamen. Dehiscence latrorse to extrorse. Anther connective broad, expanded smoothly above into a prominent, flattened, sterile appendage that appears diamond shaped from above, giving the outer surface of the androecium a characteristic tessellation. Gynoecium multicarpellate and apocarpous, arranged on the central projection of the receptacle. Individual carpels elongated with a pointed apex.

Etymology

From the geologic occurrence of the material in the Futaba Group.