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Oxroadopteris parvus gen. et sp. nov.: a protostelic Lower Carboniferous pteridosperm from Oxroad Bay, East Lothian, Scotland

Published online by Cambridge University Press:  03 November 2011

Albert G. Long
Albert G. Long
Affiliation:
33 Windsor Crescent, Berwick-upon-Tweed, Northumberland TD15 INT, England.
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Abstract

Oxroadopteris parvus gen. et sp. nov. is described from a single incomplete curved stem, 12 cm long and 8 mm diameter, having a cylindrical exarch protostele and sparganum outer cortex. Attached are 8 incomplete bifurcate petioles in probably 2/5 phyllotaxy. Each petiole has a swollen base with sclerotic nests. Petiole lengths increase upwards. Each petiolar trace is small, U-shaped in cross-section, bipolar, and divides to form similar smaller bundles in two secondary rachises.

Keywords

bifurcate petiolebipolar leaf-traceCementstone Groupexarch protostelesclerotic nestsparganum cortex
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 75 , Issue 4 , 1984 , pp. 383 - 389
Copyright
Copyright © Royal Society of Edinburgh 1984

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