European Fossil Plant Fern Paripteris Gigantea Pinnule Preserved
Item History & Price
| Reference Number: Avaluer:31693740 | Modified Item: No |
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Specimen: Nice pinnule ( leaflet ) of european coal age seed fern Paripterisgigantea (... Sternberg 1822 ) Gothan
Locality: Poland, GZW Upper Silesia Coal BasinStratigraphy: Upper Carboniferous, Westfal A - RudzkieBedsAge: ca. 315 Mya
Matrix dimensions: 14, 5 x 8, 0 x 4, 5 cm ( white square on pictures is 1, 0 x 1, 0 cm )
Description:
Medullosan seedferns (Pteridosperms) were group of seed plants from the Carboniferous andPermian periods (about 360 to 250 million years ago). Some, such as Medullosa, grew as upright, unbranched woody trunks topped with a crown of large fernlikefronds; others, such as Mariopterids, were woody vines.
All had fernlike foliage;however, they reproduced by seeds, with ovules and pollen organs attached tothe fronds. Gamete - producing structures in the seeds were surrounded by ahard inner integument and a fleshy outer layer. These features have led someauthorities to speculate that these seeds may have been dispersed by animals.Some seeds were large. ( Pachytesta gigantea, a seed of Medullosa, grewup to 7 cm long.) Pollen organs of seed ferns were also large and complex andwere commonly made up of many pollen sacs fused into a large structure.
Systematic:Ordo: MedullosalesFamilia: Whitleseyinae
Genus: Paripteris
Species: Paripteris gigantea( Sternberg 1822 ) Gothan
