Rare Fossil Plant Lonchopteris Rugosa Pre Dinosaurs Fossil Fern
Item History & Price
| Reference Number: Avaluer:19961737 | Modified Item: No |
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Specimen: Rare Lonchopter...is rugosa Brongniart 1820 - detailed, nicely preserved crossed veins fossil fern species !
Locality: Poland, GZW UpperSilesia Coal Basin
Stratigraphy: UpperCarboniferous - Westfal B - "Orzeskie" Beds
Age: ca. 315 Mya
Matrix dimensions: ca. 12, 0 x 8, 5 x 1, 0 cm ( white square on last pictures is 1, 0 x 1, 0 cm )
Description:
Seed ferns (Pteridosperms) like Lonchopteris were group of seed plants from the Carboniferous and Permian periods(about 360 to 250 million years ago).
Some, such as Medullosa ( Lonchopteris, Neuropteris, Alethopteris etc.) grew as upright, unbranched woody trunkstopped with a crown of large fernlike fronds; others, such as Mariopterids, were woody vines.All had fernlike foliage; however, they reproduced by seeds, with ovules andpollen organs attached to the fronds. Gamete - producing structures in the seeds weresurrounded by a hard inner integument and a fleshy outer layer.
These features have led some authorities tospeculate that these seeds may have been dispersed by animals. Some seeds werelarge. ( Pachytesta gigantea, a seed of Medullosa, grew up to 7 cmlong.) Pollen organs of seed ferns were also large and complex and werecommonly made up of many pollen sacs fused into a large structure.
Systematic:
Kingdom: ChlorobiotaPlantae
Family: Lyginopteridae
Genus: Lonchopteris
Species: Lonchopteris rugosa Brongniart 1820
