Nice 3D Carboniferous plant fossil seed fern Meduleosean seed Hexapterospermum for Sale

Nice 3D Carboniferous plant fossil seed fern Meduleosean seed Hexapterospermum For Sale

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Nice 3D Carboniferous plant fossil seed fern Meduleosean seed Hexapterospermum :
$19.00

My specimens are genuine and will be delivered with a "Certificate of authenticity, age and origin" and scientific papers allowing plant identification !

I combine the shipping costs. Each item is different, sopleasewait with payment after purchase-I will send You a combine invoice. Usually, it will be cost of shipping the heaviest item.

Specimen: 3D preserved , very detailed specimen of Coal age seed fernMeduleoseanseed:Hexapterospermum sp.

Locality: All detailed and accurate data will be provided with the specimen

Stratigraphy: Upper Carboniferous, WestfalA

Age: ca. 315 Mya

Matrix dimensions: 13,0 x 5,0 x 2,5 cm ( white square on pictures is 1,0 x 1,0 cm )

Description:

3D preserved , very detailed specimen of Coal age seed fernMeduleoseanseed:Hexapterospermum sp.

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: Medullosales

Familia: Whitleseyinae

Genus: Hexapterospermum

Species: Hexapterospermum sp.