Back
Guadua morronei
Guadua morronei Brea, Zucol, M.J. Franco Rev. Palaeobot. Palynol., 192: 4. 23 Jan 2013
- Name
- Guadua morronei
- Rank
- Species
- Generic Name
- [Genus] Guadua
- Authors (Pub.)
- Brea M.
Zucol A. F.
Franco M. J.
- Publication
- A new Bambusoideae (Poaceae: Bambusoideae: Bambuseae: Guaduinae) from the Ituzaingó Formation (Pliocene–Pleistocene), Entre Ríos, Argentina [2013/1]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 192
- Page number
- 4
- Year
- 2013
- Fossil Status
- stems (wood)
- Stratigraphy
- Pliocene
- Strat. comment
- Ituzaingó Formation
- Location
- El Espinillo stream locality, Entre Ríos, Argentina (31° 46′ 24.14″ S; 60° 18′ 57.56″ W)
- Paleoregion
- America (South)
Data for Holotypus
- Repository
- CICyTTP-CONICET, Colección Paleobotánica, Diamante, Entre Ríos, Argentina
- Repository Number
- CIDPALBO 104, CIDPALBOmic 1155 (a–c)
- Diagnosis
- Petrified culmwith an internode and a node. Subcylindrical in
cross-section, woody, solid at the internode and at the node, nodal region
delimited by the nodal line and the supranodal ridge; both horizontal.
Node with a probable single bud. Cross-sectional anatomy of the internode
characterized by: epidermis consisting of a layer of sclerified epidermal
cells with thick external wall. Subepidermal parenchyma formed by
3–4 layers of sclerified cells. Sclerenchyma continuous, surrounding the
first cycle of peripheral vascular bundles. Cortical parenchyma composed
of ≤10 layers of thin-walled cells. Vascular bundles in seven or more alternating
cycles. Xylem of each vascular bundle with two large metaxylem
vessels. Protoxylem consisting of ≤18 vessels. Phloem formed by
≤11 sieve tubes. Each vascular bundle surrounded by sclerenchyma.
Interfascicular parenchyma composed of isodiametric cells. Crosssectional
anatomy of the node characterized by: xylem with only
one metaxylem vessel. The position of the xylem and phloem may
change by distortion and the development of vascular bundle anastomosis
within the nodal region.
