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Alnus tschemrylica
Alnus tschemrylica Blokhina, Snezhkova Paleontol. Zhurn., 1999, (4): 132. Jul - Aug 1999
- Name
- Alnus tschemrylica
- Rank
- Species
- Generic Name
- [Genus] Alnus
- Authors (Pub.)
- Blokhina N. I.
Snezhkova S. A.
- Publication
- Iskopaemaya drevesina Alnus tschemrylica sp. nov. (Betulaceae) iz paleogena bukhty Chemurnaut (Kamchatka) [1999/7-8]
- Journal
- Paleontologicheskii Zhurnal
- Annee/Jahrgang
- 1999
- Issue
- 4
- Page number
- 132
- Year
- 1999
- Fossil Status
- stems (wood)
- Stratigraphy
- Paleocene
- Strat. comment
- Chemurnautian Series
- Location
- Chemryl Cape, Chemurnaut Bay, Penzhin Bay, Kamchatka peninsula, Kamchatka Territory, Russian Federation
- Paleoregion
- Eurasia (Far East)
Data for Holotypus
- Repository
- Institute of Biology and Soil Science, Russian Academy of Sciences, Vladivostok, Russian Federation
- Repository Number
- 15/731-4
- Diagnosis
- Wood diffuse-porous. Growth rings distinct, delineated bу 1-2(3-4) rows of flattened fibres. There are little or по change in vessel diameter and density throughout growth ring. Vessels numerous, solitary, in radial multiples of 2-10(20) or in clusters of 3-10 vessels. Vessels small, 40--60 (90-120) mkm in
diameter. Perforation plates scalariform, with 12-30 bars. Intervascular pitting opposite, altemate and transitional, with up to 8 bordered pits per vessel. Pits
circular-hexagonal or horizontally elongate, about 6 to 9 mkm respectively. Axial (wood) parenchyma abundant, diffuse and metatracheal; in transversel sections in short uniseriate tangential bands of 2-4 cells; in longitudinal
sections in strands of up to 6-8 cells. Rays numerous, uniseriate, aggregate, homocellular. Uniseriate rays prevalent, 2-22(35) cells high. Occasionally Ьiseriate rays up to 28 cells high with 1-4(5) layers of biseriate cells and with 2-10( 14) cells of uniseriate ends. Occasional Ьiseriate rays of 5 and 10 cells high, lacking uniseriate ends. Doubled rays up to 22 cells high occasionally
present. Aggregate rays of 4-6(8) uniseriate rays divided Ьу 1-2 rows of fibers. Homocellular rays tending to slightly heterocellular state, pith flecks numerous in transverse sections.
