Otozamites

Extinct genus of seed plants

Otozamites Temporal range: Upper Triassic–Lower Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N

Otozamites Anina
Scientific classification Edit this classification
Kingdom:	Plantae
Clade:	Embryophytes
Clade:	Tracheophytes
Clade:	Spermatophytes
Order:	†Bennettitales
Family:	†Williamsoniaceae
Genus:	†Otozamites C.F.W.Braun
Type species
†Otozamites brevifolius
Other species
O. meyenii

Otozamites is a genus of plants in the order Bennettitales and the family Williamsoniaceae. The leaves are usually ovate to slightly lanceolate and have branched veins. The genus is found on all continents, although it is more widespread in Eurasia.^[1]^[2]^[3]^[4]

Description

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The compound leaf is arranged in a row of pinnae, the petioles are alternate and adjacent, and have an earring-shaped base that is attached to the stem at only one point. The veins emerge from a point and radially intersect the entire margin of the pinnule in succession. The base is bayonet-shaped or linear-bayonet-shaped, rarely oval. The pinnules are usually ovate to ovate-bayonet-shaped and are located obliquely on the upper surface of the stem. The base of the pinnules is usually asymmetrical, such that the upper earring is often more developed than the lower earring. The veins are radial, divergent, and bifurcate once or more times. (Description of the type species Otozamites bechei (Brongniart, 1825) Braun, 1842) ^[1]^[3]^[2]

EB1911_Palaeobotany_-_Otozamites

Drawing of two Otozamites fossils from Inferior Oolite, England: A, O. Beani. B, O. Bunburyanus.

References

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^ ^a ^b Wang, Yong-Dong; Ni, Qing; Jiang, Zi-Kun; Tian, Ning (2008年12月01日). "Diversity variation and tempo-spatial distribution of Otozamites (Bennettitales) in the Mesozoic of China" . Palaeoworld. Palaeobotany Issue: Biodiversity, Anatomy and Evolution of the Mesozoic Plants. 17 (3): 222–234. doi:10.1016/j.palwor.200810003. ISSN 1871-174X.
^ ^a ^b McLoughlin, Stephen; Pott, Christian (2009年06月01日). "The Jurassic flora of Western Australia". GFF. 131 (1–2): 113–136. doi:10.1080/11035890902857846 . ISSN 1103-5897.
^ ^a ^b Pott, Christian; McLoughlin, Stephen (2009年12月01日). "Bennettitalean foliage in the Rhaetian–Bajocian (latest Triassic–Middle Jurassic) floras of Scania, southern Sweden" . Review of Palaeobotany and Palynology. 158 (1): 117–166. doi:10.1016/j.revpalbo.200908004. ISSN 0034-6667.
^ Wang, Y. D., Ni, Q., Jiang, Z. K., & Tian, N. (2008). Diversity variation and tempo-spatial distribution of Otozamites (Bennettitales) in the Mesozoic of China. Palaeoworld, 17(3-4), 222–234.