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Piranheoxylon perfectum
Piranheoxylon perfectum S. Iamandei, E. Iamandei Acta Palaeontol. Roman., 2017, 13(2): 72. 16 Mar 2018
- Name
- Piranheoxylon perfectum
- Rank
- Species
- Generic Name
- [Genus] Piranheoxylon
- 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
- 72
- Year
- 2018
- Fossil Status
- stems (wood)
- Stratigraphy
- Miocene
- Location
- Prăvăleni area, Cremenea Hill, Apuseni mountains, Romania
- Paleoregion
- Eurasia (Europe)
Data for Holotypus
- Repository
- Muzeul Național de Geologie, Institutul Geologic al României, București, Romania
- Repository Number
- inventory number 26,354 (field number: 171)
- Diagnosis
- Porous wood with less distinct growth rings and terminal paren-chyma. Solitary vessels and in radial multiples with in-dentations, and in irregular groups of 2-5 small vessels and tracheids, fibrotraheides. Solitary vessels rounded-polygonally shaped, to oval or irregularly star-like with moderate thick walls, radial/tangential diameters of 52/42 μm, density of 64-90 pores on mm2. Scalariform perfora-tions, storied, with 8-30 thin bars, corrugated, bifurcated and anastomosed. Intervascular pitting scalariform or oval bordered to horizontally elongate up to scalariform pits. Vascular elements length of 450-975 μm, having spiral thickenings on the high tails and tyloses. Paren-chyma diffuse, scanty-paratracheal and in discontinuous bands in the latest wood. Storied vertical strands of 6-8-16 cells with simple pitted walls, and chambered with rounded crystals inside. Rays 1-2(3)-seriate, with plat-anoid dilations, of 2-52 cells in height, uniseriate, with short biseriate storeys of the same size as uniseriate. Ra-dially the ray cells appear all procumbent, with 1-12 mar-ginal rows of slightly higher or even upright cells and with round or elliptical pits to scalariformes. Ray fre-quency is 7-10 rays on tangential mm. Often 1-3 or more crystals on fields and gums appear. Fibers with rounded polygonal large section of lumens (8-25μm), relatively thick walled, severed, rare septa and irregular pitting. Fibrotracheids and vascular tracheids with oval bordered pits, elongated to scalariformes.
