Anachoropteris pulchra Corda, 1845

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), Geodiversitas 33 (1), pp. 43-69 : 56

Anachoropteris pulchra Corda, 1845

( Fig. 6H, I )

A few fragments of rachises of this fern have been found; one ( Fig. 6H ) shows the characteristic abaxially enrolled xylem strand, a feature more hardly visible in another specimen ( Fig. 6I ). The latter is a larger rachis with a still more inrolled xylem strand. Both are conform to the species Anachoropteris pulchra Corda from Radnice, also recognized at Grand-Croix and Autun ( Corsin 1937).

Marattialean tree ferns: fragments of the different parts of the plant are present in nearly 90% of the specimens including Psaronius trunks with aerial roots, Stewartiopteris petioles and rachises, Pecopteris and Scolecopteris pinnules

Figures

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.