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Prototaxodioxylon marisii
Prototaxodioxylon marisii E. Iamandei, S. Iamandei Acta Palaeontol. Roman., 4: 142. 2004
- Name
- Prototaxodioxylon marisii
- Rank
- Species
- Generic Name
- [Genus] Prototaxodioxylon
- Authors (Pub.)
- Iamandei E.
Iamandei S.
- Publication
- New conifers in Late Cretaceous lignoflora from the South Apuseni [2004]
- Journal
- Acta Palaeontologica Romaniae
- Volume
- 4
- Page number
- 142
- Year
- 2004
- Fossil Status
- stems (wood)
- Stratigraphy
- Maastrichtian
- Location
- medial basin of Mureş river, between Alba Iulia-Geoagiu-Deva-Zam, South Apuseni, Romania
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Muzeul Național de Geologie, Institutul Geologic al României, București, Romania
- Repository Number
- inv.no. 26523
- Diagnosis
- Secondary wood with tracheidoxylic
structure, without any resin ducts with distinct growth
rings, of 20-26 cells wide, gradually diminishing, late
wood marked by 3-7 rows of thick-walled tracheids.
The tracheids are moderately thick-walled, lumina
with radial/tangential diameters=40-60/25-40(50) μm,
density=712-772 traheids on mm2, tangentially
usually unpitted, radially with abietineous 1-2-seriate
pits, of 16-18 μm in diameter, with circular big
apertures of 8-9 μm, opposite disposed, with
crassulae, or subopposite to alternate, giving a
mixed character to the pitting, usually striated walls.
Wood parenchyma present, having smooth and not
very thin unpitted horizontal walls, resin globules and
plugs in lumina. Uniseriate rays of 1-24 cells high,
sometimes with biseriate storeys, 8-10 rays on
tangential mm. Radially heterocellular, even all
procumbent, there are ordinary cells and ray
tracheids, with not too thin walls, the tangentials
without visible indentures, knotted at the insertion
point, 12-22 μm high, wavy in maginals - ray
tracheids higher: 30 μm. Ordinary cross fields with 1-
6 taxodioid pits oblique elliptic apertured, smaller in
latewood. In ray tracheids cross field - smaller
circular pits with circular apertures, sometimes
taxodioid, superposed in two rows.
