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・ Lepidopleurus finlayi
・ Lepidopleurus inquinatus
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Lepidopteris
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Lepidopteris : ウィキペディア英語版
Lepidopteris

''Lepidopteris'' ("pleasant fern") is a form genus for leaves of Late Permian to Late Triassic Period Pteridospermophyta, or seed ferns, which lived from around 260 to 200 million years ago in what is now Australia, Antarctica, India, South America, South Africa, Russia and China. Nine species are currently recognized.
''Lepidopteris'' was a common and widespread seed fern, which survived the Permian-Triassic extinction event but succumbed to the Triassic-Jurassic extinction event. ''Lepidopteris callipteroides'' is especially common between the first two episodes of Permian-Triassic extinction event, and ''L. ottonis'' forms a comparable acme zone immediate before the Triassic-Jurassic extinction event.
== Description ==

In the form generic system of paleobotany ''Lepidopteris'' is used only for leaves, which are fern-like with pinnules attached to the rachis as well as the pinnae. The cuticle of the leaves is thick and has distinctive cuticular structure with stomatal opening overhung by papillae. This nstructure has been used to link the fossil leaves with well preserved reproductive structures in the same deposits. The ovules are commonly arranged in peltate structures, which have been used to assign ''Lepidopteris'' to the Order Peltaspermales. Not all leaf species are associated with reproductive material, but well established associations include the following.
* ''Lepidopteris ottonis'' (leaves),''Peltaspermum rotula'' (ovulate structures)and ''Antevsia zeilleri'' (pollen organ).〔
* ''Lepidopteris stormbergensis'' (leaves), ''Peltaspermum thomasii'' (ovulate structures) and ''Antevsia extans'' (pollen organ).〔
* ''Lepidopteris callipteroides'' (leaves), ''Peltaspermum townrovi'' (ovulate structures) and ''Permotheca helbyi'' (pollen organ).〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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