Emwadea microcarpa

Name

Emwadea microcarpa

Rank

Species

Generic Name

[Genus] Emwadea

Authors (Pub.)

Dettmann M. E. Clifford H. T. Peters M.  

Publication

Emwadea microcarpa gen. et sp. nov.—anatomically preserved araucarian seed cones from the Winton Formation (late Albian), western Queensland, Australia [2012/3]

Journal

Alcheringa

Annee/Jahrgang

2012

Volume

36

Issue

10.1080/03115518.2012.622155

Page number

7

Year

2012

Fossil Status

cones

Stratigraphy

Albian

Location

Lovelle Downs (QML311), ridge traversing Lovelle Downs/Elderslie boundary, 48 km WNW of Winton, western Queensland, Australia

Paleoregion

Australia

Data for Holotypus

Repository

Queensland Museum, Brisbane, Australia

Repository Number

QMF51158

Num

fig. 1A

Pub.

Emwadea microcarpa gen. et sp. nov.—anatomically preserved araucarian seed cones from the Winton Formation (late Albian), western Queensland, Australia [2012/3]

Diagnosis

Seed/ovulate cone prolate ellipsoidal, with up to 200 spirally arranged cone-scale complexes emanating from a central vascularized axis. Bract scales obtriangular in outline, 2–3 mm long, swollen distally into an apophysis, which in transverse section is rhombic in outline. Each cone scale with a single, adaxial, centrally placed, ovule/seed oriented with the micropyle facing cone axis. Ovules/seeds shortly stalked, ridged or winged along lateral sides from micropyle to chalaza. Chalaza sclerotic, with a distal vascularized extension that is contiguous with the lateral wings. Megagametophyte cells isodiametric. Seeds detach from bracts. Peduncle leaves imbricate, spirally arranged; with spreading and incurved bifacial blades and acute tips.