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Bassitheca
Genus Bassitheca Manchester, P.R. Crane in Manchester, X.-Q. Zhang, Hotton, S.L. Wing, P.R. Crane Acta Palaeobot., 62(2): 79. 2022
- Name
- Bassitheca
- Rank
- Genus
- Authors (Name)
- Manchester S. R.
Crane P. R.
- Authors (Pub.)
- Manchester S. R.
Zhang X.-Q.
Hotton C. L.
Wing S. L.
Crane P. R.
- Publication
- Two-seeded cones of probable gnetalean affinity from the Morrison Formation (Late Jurassic) of Utah and Colorado, USA [2022]
- Journal
- Acta Palaeobotanica
- Volume
- 62
- Issue
- 2
- Page number
- 79
- Year
- 2022
- Parent Taxon
- [Class] Gnetopsida
- Fossil Status
- reproductive organs (seed)
- Type
- Bassitheca hoodiorum
- Diagnosis
- Cones broadly obovate in face view, convex and rounded basally, truncate apically, elliptical to narrowly ovate in lateral view, elliptical with two planes of symmetry in apical view. Cones borne on a short stout peduncle that is square to rounded in transverse section, containing four distinct vascular bundles. Cones comprised of two well-developed orthotropous seeds positioned opposite each other in the major plane, separated by a distinct median longitudinal septum in the minor plane. Well-developed seeds surrounded by protective bracts and each seed released by shedding of a lateral valve. Each seed with an apical micropyle and supplied at the base by three vascular bundles. Above the level of the seeds a median apical septum in the major plane separates two well demarcated depressions arranged opposite each other in the minor plane.
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