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Table 1 Summary of the characters distinguishing Almargemia dentata, Eobowenia incrassata and Bowenia

From: Eobowenia gen. nov. from the Early Cretaceous of Patagonia: indication for an early divergence of Bowenia?

Species

Venation

Teeth

Guard cells

Stomatal apparatus

Stomatal orientation

Almargemia dentata (Heer) Florin

Parallel

Lobe-like

Sunken

Dicyclic

Random

Eobowenia incrassata (S.Archang.) M.Coiro et C.Pott

Convergent at the base

Simple, glandular?

Level with epidermis

Monocyclic

Longitudinal

Bowenia serrulata (W.Bull) Chamb.

Convergent at the base

Simple

Level with epidermis

Monocyclic

Longitudinal

Bowenia spectabilis Hook. ex Hook.f.

Convergent at the base

Absent-simple

Level with epidermis

Monocyclic

Longitudinal

Bowenia papillosa R.S.Hill

?

?

Level with epidermis

Monocyclic

Longitudinal

Bowenia eocenica R.S.Hill

Convergent at the base

Simple

Level with epidermis

Monocyclic

Longitudinal