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Brunoa santarrosensis
Brunoa santarrosensis Artabe, Zamuner, D.W. Stev. Bot. Rev. (Lancaster), 70(2): 123. 3 Sep 2004
- Name
- Brunoa santarrosensis
- Rank
- Species
- Generic Name
- [Genus] Brunoa
- Authors (Pub.)
- Artabe A. E.
Zamuner A. B.
Stevenson D.
- Publication
- Two new petrified cycad stems, Brunoa gen. nov. and Worsdellia gen.
nov., from the Cretaceous of Patagonia (Bajo de Santa Rosa, Río Negro Province), Argentina [2004/9]
- Journal
- Botanical Review
- Volume
- 70
- Issue
- 2
- Page number
- 123
- Year
- 2004
- Fossil Status
- stems
- Stratigraphy
- Upper Cretaceous
- Strat. comment
- Allen Formation
- Location
- Bajo de Santa Rosa, Río Negro Province, Argentina
- Paleoregion
- America (South)
Data for Holotypus
- Repository
- Museo de La Plata, La Plata, Argentina
- Repository Number
- LPPB 12968a–k; LPPB-Pm 1545 to 1555
Data for Paratypus
- Repository
- Museo de La Plata, La Plata, Argentina
- Repository Number
- LPPB–Pm 1545 to 1555
- Diagnosis
- Parenchymatous pith with idioblasts, mucilage cavities, and anastomosing
medullary bundles, and vascular bundles forming rings related to cone domes. Tracheids of
secondary xylem have scalariform or araucaroid, uniseriate to triseriate, bordered pitting.
Phloem consisting primarily of fibers with few sieve cells. Cortex parenchymatous with idioblasts
and mucilage cavities. Foliar bases with monostratified epidermis and a noncontinuous
sclerenchyma band below a thin parenchymatous zone and with collateral vascular bundles
without any associated mucilage canals or cavities.
