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Piptadenioxylon paraexcelsa

Taxonomy
Piptadenioxylon paraexcelsa was named by Franco and Brea (2008). It is considered to be a form taxon. Its type specimen is PALBO 23. PALBOmic 523, a plant debris (log), and it is a 3D fossil preserving soft parts. Its type locality is Nivel Fosilifero 1, Toma Vieja, ParanĂ¡, which is in a Miocene terrestrial siltstone in the ParanĂ¡ Formation of Argentina. It is the type species of Piptadenioxylon.

Synonymy list
YearName and author
2008Piptadenioxylon paraexcelsa Franco and Brea

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RankNameAuthor
genusPiptadenioxylonSuguio and Mussa 1978
RankNameAuthor
speciesparaexcelsa

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.

Diagnosis
ReferenceDiagnosis
M. J. Franco and M. Brea 2008Dicotyledonous fossil wood. Growth rings indistinct or subtle. Diffuse porosity or semi-ring-porous. Vessels solitary, some in radial multiple series of 2-3 or in clusters. Small and numerosous. Vessel elements very short. Simple perforation plates. Intervessel pits bordered and alternate. Rays homocellular, numerosous, low, biseriate and uniseriate. Fibers quadrangular in section, with an irregular arrengement are abundant. Fibers not septate. Axial parenchyma apotracheal and paratracheal; paratracheal vasicentric incomplete in wide bands and apotracheal diffuse-in-aggregates.