Geo.Alp, Vol. 2, S. 31–51, 2005 THE LADINIAN FLORA (MIDDLE TRIASSIC) OF THE DOLOMITES: PALAEOENVIRONMENTAL RECONSTRUCTIONS AND PALAEOCLIMATIC CONSIDERATIONS Evelyn Kustatscher1 & Johanna H.A. van Konijnenburg-van Cittert2 With 7 figures and 5 tables 1 Dipartimento di Scienze della Terra, Università degli Studi di Ferrara, C.so Ercole I d’Este 32, 44100 Ferrara, Italy, e-mail
[email protected] 2 Laboratory of Palaeobotany and Palynology, Budapestlaan 4, 3584CD Utrecht, Netherlands, e-mail
[email protected] Abstract The study of several plant fossils from the Ladinian of the Dolomites, that either had been described a long time ago or had never been described at all, has led to a revision of this flora. The Ladinian flora now con- sists of the following taxa: Annalepis zeilleri (Lycophyta), Equisetites arenaceus (Sphenophyta), Cladophlebis leuthardtii, C. ruetimeyeri, Neuropteridium elegans, Scolopendrites sp., Gordonopteris lorigae (Pteridophyta), Ptilozamites heeri (Pteridospermae), Bjuvia dolomitica, Dioonitocarpidium moroderi, Pterophyllum jaegeri, ?Pterophyllum sp., Sphenozamites wengensis, Sphenozamites cf. bronnii, Taeniopteris sp. (Cycadophyta), Voltzia dolomitica, V. ladinica, V. pragsensis, V. zoldana, Voltzia sp., Pelourdea vogesiaca und Elatocladus sp. (Coniferophyta). The flora, and especially the large number of specimens housed in the Natural History Museum at Bolzano (I), indicates a dominance of conifers over (in this sequence) seedferns, cycads, ferns and horsetails. Several factors may have caused this: climatic (an arid climate on the mainland), edaphic (immature soil) or tapho- nomic (caused by selection during transport). Quantitative palynological analyses of three localities (Ritberg near Wengen, and Seewald and Innerkohlbach near Prags, indicate a generally warm and humid climate.