New Zealand Journal of Geology and Geophysics abstracts

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The pteridophyte Ashicaulis livingstonensis (Osmundaceae) from the Upper Cretaceous of Williams Point, Livingston Island, Antarctica

D. J. CANTRILL

British Antarctic Survey
Natural Environment Research Council
Madingley Rd, High Cross
Cambridge, CB3 0ET, United Kingdom

Abstract  The presence of Ashicaulis livingstonensis sp. nov. in the Upper Cretaceous Williams Point Beds of Livingston Island, Antarctica, represents an important new record of the Osmundaceae in the southern high latitudes. It extends the range of Ashicaulis to the Late Cretaceous. Ashicaulis livingstonensis sp. nov. comprises a small stem surrounded by a mantle of petiole bases and roots. Leaf gaps are narrow, rapidly closing, or occasionally incomplete, and the stem is best regarded as ectophloic siphonostele. The anatomy of Ashicaulis livingstonensis suggests an erect, probably mound-forming fern.

Keywords  Pteridophyte; Osmundaceae; Antarctica; Cretaceous

New Zealand Journal of Geology and Geophysics, 1997, Vol. 40: 315-323

0028-8306/97/4003-0315 $7.00/0 (c) The Royal Society of New Zealand 1997

PDF file of entire paper: medium quality (4318K); (scanned from paper original: notes about this process)

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