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Aextoxicoxylon kawasianum
Aextoxicoxylon kawasianum E.I. Vera, Pérez Loin., Llorens, Passalia Cretac. Res., 2020, 107(104315): 1. 12 Nov 2019
- Name
- Aextoxicoxylon kawasianum
- Rank
- Species
- Original spelling
- kawasianus
- Generic Name
- [Genus] Aextoxicoxylon
- Authors (Pub.)
- Vera E. I.
Pérez Loinaze V. S.
Llorens M.
Passalia M. G.
- Publication
- The fossil genus Aextoxicoxylon (Magnoliopsida) in the Upper Cretaceous Puntudo Chico Formation, Chubut Province, Argentina [2019/11]
- Journal
- Cretaceous Research
- Annee/Jahrgang
- 2020
- Volume
- 107
- Issue
- 104315
- Page number
- 1
- Year
- 2019
- Fossil Status
- stems (wood)
- Stratigraphy
- Upper Cretaceous
- Strat. comment
- Puntudo Chico Formation / middleeupper CampanianeMaastrichtian
- Location
- Estancia María de las Nieves, Chubut Province, Argentina
- Paleoregion
- Gondwana (South America)
Data for Holotypus
- Repository
- Museo Paleontologico Egidio Feruglio, Trelew, Argentina
- Repository Number
- MPEF-PB 9911
- Diagnosis
- Growth ring boundaries indistinct. Wood diffuseporous. Vessels mainly solitary or arranged in short radial multiples of 2 vessels. Perforation plates scalariform, with more than 40 bars. Intervessel pits scalariform to opposite. Vessel-ray parenchyma pits scalariform to opposite, with distinct borders. Fibers non-septate, with distinctly bordered pits. Rays 1-2 seriate. Biseriate rays with uniseriate margins up to seven cells tall, and central biseriate region up to five cells tall; rays often fused with adjacent ones (interconnected rays). Rays heterocellular, composed of procumbent central region and square/upright cells composing the margins. Ray frequency higher than twenty rays per mm.
