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Table 2 Comparison of Late Devonian seeds with uniovulate cupules

From: Further study of Late Devonian seed plant Cosmosperma polyloba: its reconstruction and evolutionary significance

Taxon

Number of cupule segments

Structure of cupule segments

Number of cupule tips

Number of integumentary lobes

Shape and fusion of integumentary lobes

Dorinnotheca [27]

8

distally dissected

>40

4

Triangular, basally fused

Condrusia [28]

2

flattened and broad

2

—

—

Pseudosporogonites [2]

1

short, fused and collar/trumpet shaped

—

3-4

Flattened, 1/3 fused

Latisemenia [4]

5

broad and cuneate

5

4

Flattened, 1/2-2/3 fused

Cosmosperma

2?

Distal 1/2-2/3 dissected

up to 16

4

Linear, basal 1/3 fused