Deep Time Project: A Comprehensive Phylogenetic Tree of Living and Fossil Angiosperms

Last modified: 9/3/02

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Androdecidua endressii Magallón, Herendeen et Crane

Androdecidua endressii Magallón, Herendeen et Crane represents an extinct taxon of the Hamamelidaceae from the late Santonian (Late Cretaceous) Allon locality, central Georgia, USA. ). Specimens of A. endressii comprise the androecium and corolla of a whorled, pentamerous, and actinomorphic flower. The presence of a long apical extension of the connective and the valvate anther dehiscence indicate the affinity of A. endressii with the genera of subtribe Loropetalinae (Hamamelideae; Hamamelidaceae) (Magallón et al., 2002).


Androdecidua endressii Magallón, Herendeen et Crane. Top view of androecium, with an outer (O) and an inner (I) whorl of stamens. Scale = 100 m. Modified from Magallón et al., 2002.

Pollen grains of Androdecidua endressii Magallón, Herendeen et Crane showing apertures and exine reticulum. Scale = 5 m. Modified from Magallón et al., 2002.

Reconstruction of androecium and corolla of Androdecidua endressii Magallón, Herendeen et Crane showing lateral view of androecium and petals. The petals are opposite stamens of the inner androecial whorl. Modified from Magallón et al., 2002.


Reconstruction of androecium and corolla of Androdecidua endressii Magallón, Herendeen et Crane showing staminal whorls and petals. Stamens are represented only by anthers; the connective extensions are not shown. Anthers of the outer whorl are bithecal but have only two pollen sacs, situated abaxially with respect to the site of attachment of the anther to the filament (dot). The distal stomial extensions are short. Anthers of the inner whorl are bithecal and tetrasporangiate. The distal, abaxially directed stomial extensions are short, but the distal, adaxially directed extensions are longer and reach the adaxial surface of the anther. Petals are opposite the inner stamens (Magallón et al., 2002).


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