STRUCTURALLY PRESERVED FOSSIL PLANTS FROM ANTARCTICA. IV. TRIASSIC OVULES

Small, anatomically preserved ovules are described from specimens collected at Fremouw Peak in the central Transantarctic Mountains. The ovules occur within a silicified peat in the upper part of the Fremouw Formation, which is considered to be Early to Middle Triassic. Ovules are radially symmetric...

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Bibliographic Details
Published in:American Journal of Botany
Main Authors: Perovich, Nancy E., Taylor, Edith L.
Other Authors: National Science Foundation
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1989
Subjects:
Fremouw Peak
Transantarctic Mountains
Antarc*
Antarctica
Online Access:http://dx.doi.org/10.1002/j.1537-2197.1989.tb15079.x
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Description
Summary:Small, anatomically preserved ovules are described from specimens collected at Fremouw Peak in the central Transantarctic Mountains. The ovules occur within a silicified peat in the upper part of the Fremouw Formation, which is considered to be Early to Middle Triassic. Ovules are radially symmetrical and ovoid, with an integument that consists of a narrow endotesta and a complex sclerotesta. The bilayered nucellus has a characteristic scalloped appearance and is attached to the integument only at the base. Of 43 ovules examined, 50 to 60% contain cellular megagametophyte tissue. One specimen contains a possible archegonium with embryo. Although the ovules have not been found attached, their possible affinities are discussed in relation to the known flora from this locality and other, comparable‐aged floras from Gondwana.

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