Beautiful extinct Eusphenopteris nummularia pre dinosaur fossil plant fern !

Description

My genuine specimens will be delivered with a "Certificate of authenticity, age and origin"  and scientific papers allowing plant identification !
I combine shipping costs.
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I will send You a combine invoice.
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Specimen:
Rarer coal age fossil tree seed fern:
Eusphenopteris nummularia
(GUTBIER)  E. O. NOVIK
Locality:
All detailed and accurate data will be provided with the specimen
Stratigraphy:
Upper Carboniferous - Westphalian B
Age:
ca. 305/310 Mya
Matrix dimensions:
ca. 10,0 x 7,0 x 3,0 cm ( white square on pictures is 1,0 x 1,0 cm)
Description:
Rarer coal age fossil seed fern:
Eusphenopteris nummularia
(GUTBIER)  E. O. NOVIK
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:
Kingdom:
Chlorobiota / Plantae
Family:
Lyginopteridae
Genus:          Eusphenopteris
Species:
Eusphenopteris nummularia
(GUTBIER)  E. O. NOVIK