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Nishidastrobus
Genus Nishidastrobus B.A.Atk., D.L. Contr., Stockey, G.W. Rothwell Bot. (Canada), 99(8): 463. 29 Jul 2021
- Name
- Nishidastrobus
- Rank
- Genus
- Authors (Pub.)
- Atkinson B. A.
Contreras D. L.
Stockey R. A.
Rothwell G. W.
- Publication
- Ancient diversity and turnover of cunninghamioid conifers
(Cupressaceae): two new genera from the Upper Cretaceous
of Hokkaido, Japan [2021/7]
- Journal
- Botany
- Volume
- 99
- Issue
- 8
- Page number
- 463
- Year
- 2021
- Parent Taxon
- [Order] Cunninghamiales
- Fossil Status
- cones (ovuliferous)
- Type
- Nishidastrobus japonicus
- Diagnosis
- Ovulate cones cylindrical. Bract-scale complexes
helically arranged, dorsiventrally flattened, and
sharply upturned with an abaxial thickening. Ovuliferous
scale fused to bract over half its length, free at tip and margins,
nearly membranous, containing a single resin canal. Cone axis containing many axial resin canals in the cortex.
Primary division of bract-scale trace vertical. Bract-scale
complexes with a large central resin canal continuous
with the cortical system; additional resin canals appear de
novo within complexes. Three inverted seeds per bract scale
complex, attached proximal to the separation of ovuliferous
scale tip from bract.
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