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Mesosingeria oblonga
Taxonomy
Mesosingeria oblonga was named by Villar de Seoane (2005). It is not extant. It is considered to be a form taxon. Its type locality is Estancia Bajo Grande, which is in an Aptian fluvial-lacustrine conglomerate/sandstone in the Anfiteatro de Ticó Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 2005 | Mesosingeria oblonga Villar de Seoane |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Mesosingeria oblonga Villar de Seoane 2005
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Villar de Seoane 2005 | Pinnate leaf. Oblong, alternate pinnules 0.9 cm long and 0.4 cm wide, with rounded apex, entire margins and narrow base; 7e8 veins, central veins forking once. Thick cuticle. Adaxial epidermis with rectangular cells. Abaxial epidermis with rectangular to isodiametric cells. Both cuticles with trichomes and stomata. Trichomes with 6-7 cutinized basal cells. Stomatal apparatus monocyclic, actinocytic, incorporating 7-8 subsidiary cells. Guard cells deeply sunken. Ultrastructure of external wall of the epidermis formed by a cuticle proper, a granulate outer layer and an alveolate inner layer. |
Measurements
No measurements are available
No ecological data are available