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Rhizopalmoxylon phoenicoides
Rhizopalmoxylon phoenicoides S. Iamandei, E. Iamandei in D. Velitzelos, S. Iamandei, E. Iamandei, E. Velitzelos Acta Palaeobot., 59(2): 337. 2019
- Name
- Rhizopalmoxylon phoenicoides
- Rank
- Species
- Generic Name
- [Genus] Rhizopalmoxylon
- Authors (Name)
- Iamandei S.
Iamandei E.
- Authors (Pub.)
- Velitzelos D.
Iamandei S.
Iamandei E.
Velitzelos E.
- Publication
- Palaeoxylotomical studies in the Cenozoic petrified forests of Greece. Part one – Palms [2019]
- Journal
- Acta Palaeobotanica
- Volume
- 59
- Issue
- 2
- Page number
- 337
- Year
- 2019
- Fossil Status
- roots (wood)
- Stratigraphy
- Burdigalian
- Location
- Lemnos, Greece
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Athens University, Athens, Greece
- Repository Number
- specimen 494
- Diagnosis
- Outer cortex consists of ~5–6
large suberized cells, including exodermis,
which usually is destroyed. Middle cortex built
of thickened parenchyma cells with a very specific
polygonal, radially elongated air lacunae,
and with frequent mucilaginous pockets and
ducts. Inner cortex more compact, includes
endodermis, where passage cells with visible
Caspary thickenings appear. Stele has up to 7
(or more) round thick-walled metaxylem vessels
and, toward the exterior at their top, small
alternate islands of protoxylem and phloem
appear. Metaxylem vessels have simple perforations
and annular and helical thickenings.
Ground tissue surrounds the vessels as smaller
thick-walled polygonal parenchyma cells with
point-like lumina. Central part occupied by
parenchymatous pith, with larger, thin-walled,
round to oval cells, with intercellular spaces.
Thick-walled metaxylem vessels also appear in
the pith, irregularly arranged.
