Grisellatheca

Grisellatheca; Temporal range: Early Devonian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Plantae
Genus:	†Grisellatheca
Species:	†G. sulopensis
Binomial name
	†Grisellatheca sulopensis; Edwards et al. 1999

Grisellatheca was a genus of land plant with branching axes.[1] It is known from charcoalified Early Devonian deposits, its type locality being the Brown Clee Hill lagerstatten.[2] Its Terahedraletes spores form permanent tetrads.[3]

Grisellatheca's internal anatomy comprises banded tubes, but it lacked an external cuticle.[3] It shows some liverwort characteristics, and is hesitantly assigned to this group.[3]

References

Boyce, C.K. (2008). "How green was Cooksonia? The importance of size in understanding the early evolution of physiology in the vascular plant lineage". Paleobiology. 34 (2): 179–194. doi:10.1666/0094-8373(2008)034[0179:HGWCTI]2.0.CO;2. ISSN 0094-8373.
Glasspool, I.; Edwards, D.; Axe, L. (2006). "Charcoal in the Early Devonian: A wildfire-derived Konservat–Lagerstätte". Review of Palaeobotany and Palynology. 142 (3–4): 131. doi:10.1016/j.revpalbo.2006.03.021.
Edwards, D.; Wellman, C. H.; Axe, L. (1999). "Tetrads in sporangia and spore masses from the Upper Silurian and Lower Devonian of the Welsh Borderland". Botanical Journal of the Linnean Society. 130 (2): 111–156. doi:10.1111/j.1095-8339.1999.tb00515.x.

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[Boyce2008-1] Boyce, C.K. (2008). "How green was Cooksonia? The importance of size in understanding the early evolution of physiology in the vascular plant lineage". Paleobiology. 34 (2): 179–194. doi:10.1666/0094-8373(2008)034[0179:HGWCTI]2.0.CO;2. ISSN 0094-8373.

[Glasspool2006-2] Glasspool, I.; Edwards, D.; Axe, L. (2006). "Charcoal in the Early Devonian: A wildfire-derived Konservat–Lagerstätte". Review of Palaeobotany and Palynology. 142 (3–4): 131. doi:10.1016/j.revpalbo.2006.03.021.

[Edwards1999-3] Edwards, D.; Wellman, C. H.; Axe, L. (1999). "Tetrads in sporangia and spore masses from the Upper Silurian and Lower Devonian of the Welsh Borderland". Botanical Journal of the Linnean Society. 130 (2): 111–156. doi:10.1111/j.1095-8339.1999.tb00515.x.