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Sympterophyllum
Genus Sympterophyllum Gordenko, Broushk. Paleontol. J., 44(10): 1309. Dec 2010
- Name
- Sympterophyllum
- Rank
- Genus
- Authors (Pub.)
- Gordenko N. V.
Broushkin A. B.
- Publication
- A new Bennettitalean genus from the Middle Jurassic of the Mikhailovskii Rudnik locality (Kursk Region, Russia) [2010/12]
- Journal
- Paleontological Journal
- Volume
- 44
- Issue
- 10
- Page number
- 1309
- Year
- 2010
- Parent Taxon
- [Order] Bennettitales
- Fossil Status
- foliage
- Type
- Sympterophyllum sympinnatum
- Diagnosis
- Leaves ribbon-shaped, entire
because of coherent coalescence of leaf segments. Leaf
blade pulpy. Rachis thick, leather-like. Segments
attached to upper third of rachis. Venation of segments
parallel, not expressed in segment surface relief. Adjacent segments have common cuticle in marginal
zones.
Leaves hypostomous. Stomatal apparatuses syndetoheilic, generally amphycyclic. Each segment with
single stomatal band, in which stomata more or less
regularly distributed and randomly orientated.
Numerous unicellular and bicellular trichome bases
developed in stomatal band area.
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