Description: My specimens are genuine and will be delivered with a "Certificate of authenticity, age and origin" and scientific paper allowing plant identification ! I combine shipping costs. Each item is different, so please wait with payment after purchase - I will send You a combine invoice. Usually, it will be cost of shipping the heaviest item. Specimen: Specimen of rarer, extinct fossil fern species: Sphenopteris ( Sphyropteris ) obliqua MARRATLocality: All detailed and accurate data will be provided with the specimen Stratigraphy: Upper Carboniferous, Middle Pennsylvanian, Westphalian B Age: ca. 303 - 310 Mya Matrix dimensions: ca 14,5 x 6,5 x 2,5 cm ( white square on pictures is 1,0 x 1,0 cm ) Description: Rare, extinct coal age herbaceous fossil fern Sphenopteris ( Sphyropteris ) obliqua MARRAT ! Seed ferns (Pteridosperms) were group of seed plants from the Carboniferous and Permian periods (about 360 to 250 million years ago). Some, such as Medullosa, grew as upright, unbranched woody trunks topped 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 and pollen organs attached to the fronds. Gamete - producing structures in the seeds were surrounded by a hard inner integument and a fleshy outer layer. These features have led some authorities to speculate that these seeds may have been dispersed by animals. Some seeds were large. ( Pachytesta gigantea, a seed of Medullosa, grew up to 7 cm long.) Pollen organs of seed ferns were also large and complex and were commonly made up of many pollen sacs fused into a large structure. Systematic: Ordo: MedullosalesFamilia: Whitleseyinae Genus: SphenopterisSpecies: Sphenopteris ( Sphyropteris ) obliqua MARRAT
Price: 19 USD
Location: Sosnowiec
End Time: 2024-03-08T10:05:56.000Z
Shipping Cost: 12 USD
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Item Specifics
Restocking Fee: No
Return shipping will be paid by: Seller
All returns accepted: Returns Accepted
Item must be returned within: 30 Days
Refund will be given as: Money back or replacement (buyer's choice)
