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Androstrobus patagonicus
Androstrobus patagonicus S. Archang., Villar-Seoane Rev. Palaeobot. Palynol., 131(1-2): 5. Aug 2004
- Name
- Androstrobus patagonicus
- Rank
- Species
- Generic Name
- [Genus] Androstrobus
- Authors (Pub.)
- Archangelsky S.
de Seoane L. V.
- Publication
- Cycadean diversity in the Cretaceous of Patagonia, Argentina. Three new Androstrobus species from the Baqueró Group [2004/8]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 131
- Issue
- 1-2
- Page number
- 5
- Year
- 2004
- Fossil Status
- cones (male)
- Stratigraphy
- Aptian
- Location
- Bajo Grande, Santa Cruz province, Argentina
- Paleoregion
- America (South)
Data for Holotypus
- Repository
- Museo de La Plata, La Plata, Argentina
- Repository Number
- LP Pb 6301; BA Pb MET
178, 180; BA Pb MEB 81, 82 [Buenos Aires Natural History Museum, Paleobotany Division collection (BA Pb)]
- Diagnosis
- Fragment of a cone showing cutinized
oblong microsporophylls bearing microsporangia. Cuticle
of microsporophyll having two layers of approximately
the same thickness, with polygonal to
isodiametric cells. Anticlinal walls straight, occasionally
pitted. Stomata densely distributed, placed in rows.
Stomatal apparatus haplocheilic, polycyclic. Mouth of
stoma subcircular. Subsidiary cells slightly papillate, 9
to 10. Guard cells sunken and thickened around mouth.
Occasional trichome bases present. Microsporangia
subcircular to elongate, compactly placed, not forming
sori. Membrane delicate and smooth. Pollen grains
monocolpate up to 34 Am long and 28 Am wide,
circular to subcircular in polar view. Exine smooth,
with basal laminated layer and alveolate ektexine.
Orbicules abundant.
Nomenclatural synonyms (basionyms)
Species
