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Bogutchanthus
Genus Bogutchanthus N.P. Maslova, Kodrul, Tekl. Paleontol. Zhurn., 2007, (5): 91. 2007
- Name
- Bogutchanthus
- Rank
- Genus
- Authors (Pub.)
- Maslova N. P.
Kodrul T. M.
Tekleva M. V.
- Publication
- Novoe tychinochnoe sotsvetie Bogutchanthus gen. nov. (Hamamelidales) iz paleotsenovykh otlozhenij Amurskoj oblasti, Rossiya [2007]
- Journal
- Paleontologicheskii Zhurnal
- Annee/Jahrgang
- 2007
- Issue
- 5
- Page number
- 91
- Year
- 2007
- Parent Taxon
- [Family] Platanaceae
- Fossil Status
- inflorescences (male)
- Type
- Bogutchanthus laxus
- Diagnosis
- Sessile staminate heads 4-5 mm in
diameter. Up to 40 numbers of flowers per head. Flowers in loose arrangement. Perianth differentiated. Epidermal cells of outer perianth elements vary in outlines,
strongly cutinized, in longitudinal rows. Epidermal
cells of inner elements isodiametric and polygonal,
with rare stomata and numerous weakly cutinized rounded bases of hairs. Flower tetramerous. Stamen filaments lacking. Immature stamens tetrasporangiate,
mature stamens secondarily Ьisporangiate, pollen sacs
vary in size and outline even with one stamen. Connective narrow; extension of connective small, triangular,
often asymmetrical. Epidermis of extension of connective without stomata. Staminodes 300 J..Lm long, resemble stamens in shape, apically with triangular widening,
basally fused with perianth elements. Pollen grains pericolpate fuse-porous, colpi vary in size and position.
Distinct colpus is formed Ьу sporopollenin rim. Polar
axis of mature pollen grains 15.0-17.0 J..Lm equatorial
diameter 11.0-15.0 J..Lm. Sculpture reticulate. Meshes
of reticulum near colpus margin and in mesocolpium
are identical. Pollen grains semitectate and columellate.
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