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Microstrobos microfolius
Taxonomy
Microstrobos microfolius was named by Wells and Hill (1989) [Type locality. Mudstone lens, cutting, Monpeelyata Canal.
Specimens examined. M-801, 1155, LRR2-021, 022]. It is considered to be a form taxon. Its type specimen is Holotype. M-1155, Department of Plant Science, University of Tasmania., a sterile axis (Cuticle), and it is a compression fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Microstrobos microfolius Wells and Hill p. 413 figs. 79-82 |
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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.
†Microstrobos microfolius Wells and Hill 1989
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. M. Wells and R. S. Hill 1989 | Ultimate leafy shoots less than 1 mm in diameter bearing spirally arranged leaves. Leaves small, bifacial, strongly keeled, decurrent, closely appressed imbricate scales, 0.5-0.9 mm long, 0.4-0.6 mm wide. Apex blunt, incurved slightly. Margin with distinct continuous frill from widest points of leaf to apex, 30-60 μm in length from leaf edge. Cuticle episomatic, stomata in one large zone extending from base to apex on adaxial surface, small stomata free zones near margins and in the region at base of midvein. Stomata lying in uniseriate rows, rarely separated by more than 1 epidermal cell, polar subsidiary cells often shared between stomata within the same row, lateral subsidiary cells sometimes in contact or shared between stomata of adjacent rows. Stomata1 complex neither paratetracytic nor amphicyclic since subsidiary cells elongate, narrow, and of considerably varying lengths; polar subsidiary cells 2, square to elongate rectangular, anticlinal wall often deeply pitted. Guard cell cuticular flange considerably elongate, usually with marked polar extensions, but lateral extensions not conspicuous. Epidermal cells outside stomatal zones rectangular, narrow, in longitudinal files; periclinal walls slightly granular, anticlinal walls thick, beaded. |
Measurements
No measurements are available
No ecological data are available
Age range: Late/Upper Oligocene or 27.30000 to 23.04000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oligocene | Australia (Tasmania) | Microstrobos microfolius (167317) | |
| Late/Upper Oligocene - Early/Lower Miocene | Australia (Tasmania) | Microstrobos microfolius (167314) |