Fig. 2 in A new vesselless angiosperm stem with a cambial variant from the Upper Cretaceous of Antarctica ...
Fig. 2. Light micrographs of the stem of chloranthacean angiosperm Sarcandraxylon sanjosense gen. et sp. nov. (IAA-Pb 621), San José Pass, Antarctica, early–middle Campanian. A. Transverse section of the complete stem with pith, secondary xylem, phloem, and bark. B. Protoxylem (black arrow) and meta...
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| Format: | Still Image |
| Language: | unknown |
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Zenodo
2020
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| Online Access: | https://dx.doi.org/10.5281/zenodo.12195740 https://zenodo.org/doi/10.5281/zenodo.12195740 |
| Summary: | Fig. 2. Light micrographs of the stem of chloranthacean angiosperm Sarcandraxylon sanjosense gen. et sp. nov. (IAA-Pb 621), San José Pass, Antarctica, early–middle Campanian. A. Transverse section of the complete stem with pith, secondary xylem, phloem, and bark. B. Protoxylem (black arrow) and metaxylem (white arrow) in a vascular bundle. C. Secondary xylem in transverse section, pith in the left (white arrow), two interfascicular rays and fascicular secondary xylem (fx) intercalated. White arrow pointing uniseriate fascicular ray. D. Detail of bark and secondary phloem. Note phloem with AVES pattern as well. Phloem cells not preserved (p) and phloem fibers cap (black double head arrow) separated by interfascicular rays (ir). Bark (white double head arrow) with a continued thickened layer, forming shallow ribs. E. Tangential section of the stem, arrows pointing fascicular uniseriate rays; at both sides interfascicular rays (ir). Scale bars: 50 μm; except A, 1 mm. ... : Published as part of Pipo, M. Laura, Iglesias, Ari & Bodnar, Josefina, 2020, A new vesselless angiosperm stem with a cambial variant from the Upper Cretaceous of Antarctica, pp. 261-272 in Acta Palaeontologica Polonica 65 (2) on page 264, DOI: 10.4202/app.00697.2019, http://zenodo.org/record/12195736 ... |
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