Beautiful big pre dinosaur fossil plant Carboniferous extinct climber seed fern

Description

My specimens are genuine and will be delivered with a "Certificate of authenticity, age and origin"  and scientific papers allowing to plant identification !!!
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Specimen:
Classic c
oal age liana like extinct seed fern
Mariopteris muricata
(
Schlotheim 1804
)
Zeiller 1886
,
Locality:
All detailed and accurate data will be provided with the specimen
Stratigraphy:
Upper Carboniferous, Middle Pennsylvanian - Westphalian B
Age:
ca. 310 Mya,
Matrix dimensions:
ca. 14,0 x 10,0 x 1,5 cm ( white square on pictures is 1,0 x 1,0 cm )
Description:
Very beautiful specimen of fossil fern
Mariopteris muricata
( Schlotheim 1804) Zeiller
- climber vine, liana-like seed fern fossil frond ! Ferns preserved on both side of matrix.
Mariopteris muricata
(
Schlotheim 1804
)
Zeiller 1886
is uncommon Mariopterids species. In this species the secondary pinnae are linear-lanceolate, alternate and oblique to the rachis. The pinnules are confluent at the base and subtriangular. The lateral veins straight, generally immersed and hidden, once near the base, with the lower positioned ones often forking again.
Mariopteridaceae
seed ferns (Pteridosperms) group contains two genera, Marioptris and Karinopteris.
Mariopteris
is a form genus for relatively small compact fronds which are bifurcated twice.
The pinnules are tongue-shaped to assymmetrically triangular in outline with a distinct basal lobe (at least the pinnules closest to the main axes). Although it is clear that most mariopterids are seed ferns, their natural affinity remains unclear. Karinopterids obviously had a climbing growth habit. This species, like other Karinopteroids and Mariopteroids, had a vine- to liana-like growth habit and climbed with specialized climber hooks.
Systematic:
Division:
Tracheophyta (Sphenopsida)
Kingdom:               Chlorobiota
Plantae
Family:
Mariopteridaceae
Genus:
Mariopteris (Zeiller 1878)
Species:
Mariopteris muricata
(
Schlotheim 1804
)
Zeiller 1886