Back
Worsdellia
Genus Worsdellia Artabe, Zamuner, D.W. Stev. Bot. Rev. (Lancaster), 70(2): 127. 3 Sep 2004
- Name
- Worsdellia
- Rank
- Genus
- 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
- 127
- Year
- 2004
- Parent Taxon
- [Family] Encephalartaceae
- Fossil Status
- stems
- Type
- Worsdellia bonettiae
- Diagnosis
- Stem arborescent, covered by alternating cycles of cataphylls and persistent
rhomboidal foliar bases, polyxylic. Manoxylic vascular cylinder with two concentric rings
of collateral vascular bundles and centripetal vascular bundles with respect to the inner ring.
Foliar traces run irregularly, and as they pass through wide rays to the outer cortex they curve,
producing a girdling configuration. Medullary bundles and mucilage canals occur in the pith.
Links by generics
Species
