TY - JOUR A1 - Simunek,Z. T1 - A large specimen and cuticles of Paripteris gigantea (Sternberg) Gothan from its type area Zacler (Pennsylvanian, Czech Republic) JF - Bulletin of Geosciences JA - Bull. Geosci. Y1 - 2009 VL - 84 IS - 2 SP - 269 EP - 282 CY - Prague PB - Czech Geological Survey SN - 1803-1943 (online), 1802-6222 (print) AV - Free KW - Paripteris gigantea KW - Pennsylvanian KW - cuticular analysis KW - Intrasudetic Basin AB - An exceptionally well preserved, large fragment of Paripteris gigantea frond with “pseudo-pinnate” organization was found in Zacler, Lampertice Member, Zacler Formation (Intrasudetic Basin, Czech Republic). The single distal dichotomy of several basal “ultimate” pinnae is documented. The adaxial cuticle has elongated tetragonal cells oriented parallel to veins. The cells of the abaxial cuticle are probably polygonal with faintly discernible anticlinal walls; the haplocheilic stomata are sunken, partly covered by the proximal papillae of the subsidiary cells. Stomata are 22-30 µm long and 10-14 µm wide. Trichom bases are present on the pinnule margin and in the intercostal field of the abaxial cuticle. There are two concepts in the infrageneric classification of Paripteris. In contrast to traditional binomical classification (e.g., Cleal & Shute 1995), Zhang et al. (1993) preferred to provisionally interpret all the so far described species as forms of Paripteris gigantea. ER -