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Aceroxylon zarandense
Aceroxylon zarandense S. Iamandei, E. Iamandei Acta Palaeontol. Roman., 2017, 13(2): 77. 16 Mar 2018
- Name
- Aceroxylon zarandense
- Rank
- Species
- Generic Name
- [Genus] Aceroxylon
- Authors (Pub.)
- Iamandei S.
Iamandei E.
- Publication
- New trees identified in the petrified forest of Middle Miocene from Zarand, Apuseni mountains, Romania [2018/3]
- Journal
- Acta Palaeontologica Romaniae
- Annee/Jahrgang
- 2017
- Volume
- 13
- Issue
- 2
- Page number
- 77
- Year
- 2018
- Fossil Status
- stems (wood)
- Stratigraphy
- Miocene
- Location
- Prăvăleni area from the left side of Prăvăleni valley at the confluence with Bodișteanu brook, Zarand, Apuseni mountains, Romania
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Muzeul Național de Geologie, Institutul Geologic al României, București, Romania
- Repository Number
- inventory number 26,279 (field number: 26)
- Diagnosis
- Secondary wood diffuse-porous with relatively distinct growth rings, marked by slightly flattened terminal fibers and dilated rays at ring boundary. Vessels solitary and in radial groups of 2-3(5), the solitary oval or circular in cross section, of 42-75(84) / 42-51(60) μm, and thick-walled of 4-8.5 μm double wall, density of 35-60(85) vessels on mm2, simple perforations, spiral thickenings frequent and relatively thick, bordered pitting, pits round to oval, numerous, alternate to sub-opposite without touching each other, small of 4-7 μm, with circular aper-tures of 2-3.5 μm to horizontally elongated, or point like. The vascular elements have 500-640 μm in length, large thin-walled tyloses inside and solitary crystals or colored crystal-sand. Parenchyma apotracheal diffuse, as short or long uniseriate bands interleaved in the latest wood, and rarely paratracheal. Vertically the parenchyma appears as near square empty cells in vertical strands of 2-4 cells, sometimes pitted and with crystals. Rays 1-4-seriate, the uniseriates of 3-12 cells tall, the 2-4-seriates fusiform, of 15-77 cells tall, with endings of 1-8 cells. In the ray-body sometimes larger mucillaginous cells appear. Ray fre-quency is of 8-10 rays on tangential mm. Rays homocel-lular, with ray-cells all procumbent, sometimes square, with spaced simple, very small pits, of 2 μm, on two rows arranged in the cross-fields with vessels and with solitary crystals. The fibers have polygonal section of 15-20 μm in diameter, thick walls, spiral thickenings, septa, and rare, small, simple pitting in a vertical row.
