FIG. 6. — Silicified plants from the Permian of Sardinia: A-G, Ankyropteris brongniartii Renault, transverse sections of rachises and pinnules, all oriented with adaxial surface upwards: A, primary rachis (SAR01B1B03); B, secondary rachis with the base of a third order one (arrow) (SAR11AS01); C, connected rachises of second (R2) and third order (R3) with pinnules (arrows) (SAR01B1B02); D, third order or ultimate rachis with attached pinnules (SAR01A1B02); E, another ultimate rachis sowing the C-shaped xylem strand and attached pinnules (SAR11AS01); F, G, sections of pinnule lamina showing stomata (arrows), thick epidermis on both faces and veinlets in G (SAR01B1B01, SAR11AS01); H-I, Anachoropteris pulchra Corda, transverse sections of probable second order rachis (H) and large primary rachis (I) showing abaxially enrolled xylem strand (SAR08BB03, SAR24B02). Scale bars: A-D, I, 1 mm; E, H, 0.5 mm; F, G, 100 μm.

Published as part of Galtier, Jean, Ronchi, Ausonio & Broutin, Jean, 2011, Early Permian silicified floras from the Perdasdefogu Basin (SE Sardinia): comparison and bio-chronostratigraphic correlation with the floras of the Autun Basin (Massif central, France), pp. 43-69 in Geodiversitas 33 (1) on page 54, DOI: 10.5252/g2011n1a4, http://zenodo.org/record/4596948