Wattieza

Wattieza; Temporal range: Middle Devonian
	W. givetiana
Scientific classification
Kingdom:	Plantae
Division:	Pteridophyta
Class:	†Cladoxylopsida
Order:	†Pseudosporochnales
Genus:	Wattieza; Stockmans W. givetiana Stockmans ; W. casasii Berry ;

Wattieza was a genus of prehistoric trees that existed in the mid-Devonian that belong to the cladoxylopsids, close relatives of the modern ferns and horsetails. The 2005 (publicly revealed in 2007) discovery in Schoharie County, New York, of fossils from the Middle Devonian (about 385 million years ago) united the crown of Wattieza to a root and trunk known since 1870. The fossilized grove of "Gilboa stumps" discovered at Gilboa, New York, were described as Eospermatopteris, though the complete plant remained unknown. These fossils have been described as the earliest known trees, standing 8 m (26 ft) or more tall, resembling the unrelated modern tree fern.[1]

W. casasii

Wattieza had fronds rather than leaves,[2] and reproduced with spores.[1]

Belgian paleobotanist François Stockmans described Wattieza givetiana in 1968 from fossil fronds collected from Middle Devonian strata in the London-Brabant Massif in Belgium.[3]

English geologist and palaeobotanist Chris Berry described Wattieza casasii in 2000 from fossil branches collected from Middle Devonian strata (green mudstones and shales close to the base of the Campo Chico Formation, Givetian) in Cano Colorado, Perija Range, Venezuela.[4]

References

Stein, W. E., F. Mannolini, L. V. Hernick, E. Landling, and C. M. Berry. 2007. "Giant cladoxylopsid trees resolve the enigma of the Earth's earliest forest stumps at Gilboa", Nature (19 April 2007) 446:904-907.
Meyer-berthaud, B.; Decombeix, A.L. (2007). "Palaeobotany: A tree without leaves". Nature. 446 (7138): 861–862. arXiv:0704.2554. doi:10.1038/446861a. PMID 17443169.
Berry, Chris (2009). "The Middle Devonian plant collections of Francois Stockmans reconsidered". Geologica Belgica. 12 (1–2): 25–30.
Berry, CM (1 October 2000). "A reconsideration of Wattieza Stockmans (here attributed to Cladoxylopsida) based on a new species from the Devonian of Venezuela". Review of Palaeobotany and Palynology. 112 (1–3): 125–146. doi:10.1016/s0034-6667(00)00038-5. ISSN 0034-6667. PMID 11042329.

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[Stein2007-1] Stein, W. E., F. Mannolini, L. V. Hernick, E. Landling, and C. M. Berry. 2007. "Giant cladoxylopsid trees resolve the enigma of the Earth's earliest forest stumps at Gilboa", Nature (19 April 2007) 446:904-907.

[Meyer-berthaud2007-2] Meyer-berthaud, B.; Decombeix, A.L. (2007). "Palaeobotany: A tree without leaves". Nature. 446 (7138): 861–862. arXiv:0704.2554. doi:10.1038/446861a. PMID 17443169.

[3] Berry, Chris (2009). "The Middle Devonian plant collections of Francois Stockmans reconsidered". Geologica Belgica. 12 (1–2): 25–30.

[4] Berry, CM (1 October 2000). "A reconsideration of Wattieza Stockmans (here attributed to Cladoxylopsida) based on a new species from the Devonian of Venezuela". Review of Palaeobotany and Palynology. 112 (1–3): 125–146. doi:10.1016/s0034-6667(00)00038-5. ISSN 0034-6667. PMID 11042329.