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Placotheca
Genus Placotheca De-M. Wang, L. Liu, Y. Guo, J.-Z. Xue, M.-C. Meng Sci. Rep., 5(10736): 1. 29 May 2015
- Name
- Placotheca
- Rank
- Genus
- Authors (Pub.)
- Wang D.-M.
Liu L.
Guo Y.
Xue J.-Z.
Meng M.-C.
- Publication
- A Late Devonian fertile organ with seed plant affinities from China [2015/5]
- Journal
- Scientific Reports
- Volume
- 5
- Issue
- 10736
- Page number
- 1
- Year
- 2015
- Parent Taxon
- [Class] Moresnetiopsida
- Fossil Status
- insynangescenceswith ovules (with ovules)
- Type
- Placotheca minuta
- Diagnosis
- Synangiate pollen organ bilaterally symmetrical; oval synangial pad with dome-shaped bottom, with margin curving toward and then extending away from synangial center. Microsporangia numerous, elongate, arising from margin of pad to produce a single ring, with their tips curving toward synangial center; microsporangia basally and somewhat laterally fused and distally free. Prepollen trilete, small, spherical in shape, and bearing indistinct papillate ornamentation.
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