Stems with attached Dicroidium leaves from the Ipswich Coal Measures, Queensland, Australia
A single large block of massive siltstone with bands of medium to fine sandstone from the Late Triassic Blackstone Formation of the Ipswich Coal Measures of Queensland has revealed three stems each bearing fascicles of Dicroidium elongatum leaves. Two stems are preserved parallel to the bedding plane and the third is a vertically compressed and coalified stem passing at c. 45° through the matrix. The specimens show a single leaf or fascicles of from two to four leaves attached to protuberances or short shoots arranged spirally up the stems. This is the first occurrence in the fossil record of the multiple attachment of leaves and the growth habit of the plants in the ubiquitous Gondwana genus Dicroidium.
Anderson, H.M., Holmes, W.B.Keith & Fitness, L.A. 2008 04 30: Stems with attached Dicroidium leaves from the Ipswich Coal Measures, Queensland, Australia. Memoirs of the Queensland Museum 52(2): 1-12. Brisbane. ISSN 0079-8835.