Worsdellia bonettiae

Name

Worsdellia bonettiae

Rank

Species

Generic Name

[Genus] Worsdellia

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

Fossil Status

stems

Stratigraphy

Upper Cretaceous

Strat. comment

Allen Formation

Location

Bajo de Santa Rosa, Río Negro Province, Argentina

Paleoregion

America (North)

Data for Holotypus

Repository

Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires, Buenos Aires, Argentina

Repository Number

53818 in the Entomology Division

Num

10-17

Pub.

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]

Diagnosis

Polyxylic stem with a wide, central, parenchymatous pith containing mucilage canals and medullary bundles. Vascular cylinder composed of two rings of collateral vascular strands and centripetal vascular bundles with respect to the inner ring. Cortex parenchymatous with extrafascicular concentric bundles and girdling leaf traces in the external zone. Persistent leaf bases are of small dimensions.