| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Phyllocladus annulatus
Taxonomy
Phyllocladus annulatus was named by Hill (1989). It is not extant. It is considered to be a form taxon. Its type specimen is P-742, a cuticle.
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Phyllocladus annulatus Hill p. 204 figs. 4R-T; 6A-B |
Is something missing? Join the Paleobiology Database and enter the data
|
|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Phyllocladus annulatus Hill 1989
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Hill 1989 | Size and shape of phylloclade unknown, but possessing serrate lobes 6-9 mm long, 2-3 mm wide. Phylloclades amphistomatic, stomata with approximately equal density on both surfaces, in more or less regular longitudinal rows. Florin ring with an unlobed ridge, surrounded by a peripheral groove with a steep inner wall and sloping outer wall. Outer cuticular surface between Florin rings smooth. Cuticle covering subsidiary and epidermal cells smooth. Cuticular flange between subsidiary cells and adjacent epidermal cells shorter and thinner than other cuticular flanges, perpendicular to the phylloclade surface, giving a rinj-like appearance to the group of subsidiary cells. |
Measurements
No measurements are available
No ecological data are available