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Kachaikestrobus
Genus Kachaikestrobus Del Fueyo, S. Archang., Llorens, Cúneo Int. J. Pl. Sci., 169(6): 800. Jul - Aug 2008
- Name
- Kachaikestrobus
- Rank
- Genus
- Authors (Pub.)
- Del Fueyo G. M.
Archangelsky S.
Llorens M.
Cúneo N. R.
- Publication
- Coniferous ovulate cones from the Lower Cretaceous of Santa Cruz Province, Argentina [2008/7-8]
- Journal
- International Journal of Plant Sciences
- Volume
- 169
- Issue
- 6
- Page number
- 800
- Year
- 2008
- Parent Taxon
- [Family] Cheirolepidiaceae
- Fossil Status
- cones (ovuliferous)
- Type
- Kachaikestrobus acuminatus
- Diagnosis
- Conifer branches of penultimate order terminally
bifurcate, in last-order twigs bearing terminal ovulate
cones. Leaves scalelike, decurrent, and with acuminate apex;
spirally disposed and adpressed to twigs. Stomata on both
surfaces randomly placed; sparse in apex. Stomatal apparatus
monocyclic. Anticlinal flanges straight. Ovulate cones elongate,
with cone scales helically arranged on central axis, composed
of acuminate bracts subtending ovuliferous dwarf shoots,
fused at bases. Ovuliferous dwarf shoots broad, shorter than
bracts, each consisting of eight scales. Papillae present on both
surfaces of scale. Ovuliferous dwarf shoots and bracts amphistomatic;
stomatal characters as for leaves. Epimatium covering
at least one(?) ovule. Bract and ovuliferous dwarf shoot cuticle
ultrastructure composed of three layers.
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