New data on the epidermal structure of the leaves of Podozamites Braun

Abstract

In this paper, we study the morphological and epidermal features of leaves of Podozamites distans (type species) from two localities near that of the lectotype in Bavaria, Germany whose morphology is identical with the leaves of the lectotype, designated here. Emended diagnoses are provided for the genus Podozamites and its type species P. distans. Two new species, P. doludenkoae from the Kokala Formation (Toarcian, Early Jurassic) and the Karadiirmen' Formation (Bajocian, Middle Jurassic) of Mangyshlak (Kazakhstan), and P. irkutensis from the Prisayan Formation (Aalenian–Bajocian, Middle Jurassic) of Irkutsk Basin (East Siberia, Russia), are described. The species originally described as P. ex gr. lanceolatus from Southern Primorye, P. aff. eichwaldii and Podozamites sp. from the Bureya Basin have been attributed to P. doludenkoae. The species originally described as P. lanceolatus and P. lanceolatus var. longifolia (Prynada, 1962) from the Prisayan Formation of Irkutsk Basin has been proved to be identical with P. irkutensis.