|
Comparison between Schmeissneria and other possibly related fossil taxa. |
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| Appendage arrangement |
Appendage shape |
No. appendages per peduncle |
Appendage opening orientation |
Appendage apex |
Seed/central unit position |
Ovule completely enclosed |
Vertical septum |
No. ovules/seeds per cupule/central unit |
Peduncle connects to |
|
|
|
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| Schmeissneria(young) [24,*] |
Irregular |
Globose, in pair |
2 |
Away from axis |
More or less extended |
Within the sheathing envelope |
+ |
+ |
2? |
Envelope |
| Schmeissneria(mature)[24] |
Irregular |
Sickle-like, single |
1–2 |
Away from axis |
Wing-shaped |
Below the wing, enclosed (?) |
? |
? |
1? |
Seed? |
| Ktalenia[75] |
Opposite, subopposite |
Globose |
1 |
Down |
More or less extended |
Within cupule |
- |
- |
1–2 |
Cupule |
| Schizolepis[73] |
Spiral |
Bilobate |
1 |
Up |
Lobate |
Axil of scale |
- |
- |
2 |
Scale |
| Drepanolepis[74] |
Spiral |
Sickle-like |
1 |
Up |
Wing-shaped |
Axil of scale |
- |
- |
1 |
Scale |
| Leptostrobus[44,76] |
Spiral |
Round bivalvate |
1 (2 valves) |
Away from axis |
Round, thickened margin |
Within capsule, axil of valves |
- |
- |
Several |
Cupule |
| Caytonia[33,58] |
Opposite |
Globose |
1 |
To axis |
Extended lip |
Within capsule |
- |
- |
Several |
Cupule |
| Karkenia[24,77-78] |
Irregular |
Round-oval |
1 |
To axis |
Acuminate apex |
On peduncle |
- |
- |
1 |
Ovule/seed |
|
Note the characters (enclosed ovule, vertical septum) distinguishing Schmeissneria from the others. *: information from this paper. | ||||||||||
Wang et al. BMC Evolutionary Biology 2007 7:14 doi:10.1186/1471-2148-7-14 |
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