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Paleobiology of gigantopterids from ...

Li, Hongqi.

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Paleobiology of gigantopterids from the upper Permian of Buizhou Province, China.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Paleobiology of gigantopterids from the upper Permian of Buizhou Province, China./
作者:	Li, Hongqi.
面頁冊數:	270 p.
附註:	Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4270.
Contained By:	Dissertation Abstracts International57-07B.
標題:	Paleobotany. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9639283
ISBN:	9780591050899

Paleobiology of gigantopterids from the upper Permian of Buizhou Province, China.
Li, Hongqi.

Paleobiology of gigantopterids from the upper Permian of Buizhou Province, China. - 270 p.

Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4270.

Thesis (Ph.D.)--The Ohio State University, 1996.

Gigantopterids are a group of Permian (about 280 million years ago) plants that existed in the Cathaysian flora plus a few taxa reported from southwestern North America. Cathaysia flora occupied China, Japan, Korea, and other Southeastern Asian countries, and has been commonly referred as the Gigantopteris flora for the dominated gigantopterids. Many gigantopterids have large broad leaves with reticulate venation so that they are similar to those of extant Gnetum and certain angiosperm plants. However, their systematic affinities remain enigmatic since this group have been known limited to their leaf morphology mainly, except some recently reported foliage anatomy.

ISBN: 9780591050899Subjects--Topical Terms:

545182
Paleobotany.

Paleobiology of gigantopterids from the upper Permian of Buizhou Province, China.
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245 1 0 $a Paleobiology of gigantopterids from the upper Permian of Buizhou Province, China.
300 $a 270 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4270.
500 $a Adviser: William A. Jensen.
502 $a Thesis (Ph.D.)--The Ohio State University, 1996.
520 $a Gigantopterids are a group of Permian (about 280 million years ago) plants that existed in the Cathaysian flora plus a few taxa reported from southwestern North America. Cathaysia flora occupied China, Japan, Korea, and other Southeastern Asian countries, and has been commonly referred as the Gigantopteris flora for the dominated gigantopterids. Many gigantopterids have large broad leaves with reticulate venation so that they are similar to those of extant Gnetum and certain angiosperm plants. However, their systematic affinities remain enigmatic since this group have been known limited to their leaf morphology mainly, except some recently reported foliage anatomy.
520 $a Many compressed, impressed, and permineralized gigantopterid organs have been collected from the Upper Permian strata of western Guizhou Province, China and used in this research. For the first time, the leaf architectures of gigantopterids have been summarized, and an actinodromous type has been recognized, based on the present material and previous studies. With the permineralized material, two gigantopterid leaf taxa have been anatomically updated, and reconstructed together with two associated stem taxa based on their organic connection and/or anatomical similarities. Significantly, one axial taxon has been found with large vessels in metaxylem and secondary xylem. Combining the morphology and anatomy of both leaves and stems, gigantopterids have been suggested as lianas, with either spines or tendrils, grown in tropical rain-forest of Permian. The occurrence of vessels seem to have resulted in a coupled structure/function co-evolution of a liana habit, although the vessels suggest gigantopterids might structurally have evolved to a level equal to that of anthophytes. On the other hand, gigantopterid reproductive organs have not been well understood. Although some potential, compressed seeds and two types of synangia have been found intimately associated or connected with gigantopterids, they still open to a further comprehensive study to determine their systematic position.
520 $a Geographically, the concepts of Gigantopteris flora and Cathaysia flora have been replaced with the Gigantopterid Biome and Cathaysia Region, respectively. Permian geography has been reconstructed, and possible migration pathways of gigantopterids from Asia to North America have also been discussed, based upon the plant megafossil data.
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