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Banksieaephyllum taylorii (Proteaceae) from the Late Paleocene of New South Wales and its relevance to the origin of Australia's scleromorphic flora

journal contribution
posted on 2023-05-17, 22:15 authored by Carpenter, RJ, Gregory JordanGregory Jordan, Robert HillRobert Hill
Leaf specimens from Late Paleocene sediments in New South Wales are assigned to a new species of Banksieaephyllum, B. taylorii. In gross morphology the leaves are indistinguishable from those of extant Dryandra formosa, and similar to a few other species of Dryandra and Banksia. These species have pinnately lobed leaves and are now confined to south-western Australia. In cuticular morphology, B. taylorii is most similar to Banksia species from subgenus Banksia, section Oncostylis. One species in this section, B. dryandroides, also has pinnately lobed leaves. The fossil specimens demonstrate that subtribe Banksiinae had differentiated by the Late Paleocene and represent the earliest record of angiosperm scleromorphy in Australia to date. The superficial placement of the stomates compared with most modem Banksiinae supports the hypothesis that xeromorphy in this group generally increased in response to the development of less mesic climates in the Late Tertiary.

History

Publication title

Australian Systematic Botany

Volume

7

Pagination

385-392

ISSN

1030-1887

Department/School

School of Natural Sciences

Publisher

C S I R O Publishing

Place of publication

150 Oxford St, Po Box 1139, Collingwood, Australia, Victoria, 3066

Rights statement

Copyright 1994 CSIRO

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the biological sciences

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