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Dacrycarpus lanceolatus
Taxonomy
Dacrycarpus lanceolatus was named by Wells and Hill (1989) [Type locality. Mudstone lens, cutting, Monpeelyata canal.
Specimens examined. M-242, 1186, 1187.]. It is considered to be a form taxon. Its type specimen is M-1186, Department of Plant Science, University of Tasmania., a sterile axis (Cuticle), and it is a compression fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1989 | Dacrycarpus lanceolatus Wells and Hill p. 397 fig. 19,23,24 |
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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.
†Dacrycarpus lanceolatus Wells and Hill 1989
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. M. Wells and R. S. Hill 1989 | Foliage uniform, spirally arranged, leaves bifacial, decurrent, imbricate, appressed, linear-lanceolate, keeled, 2.3 (2.0-2.5) mm long, 0.5 (0.4-0.8) mm wide. Apex acute, slightly inwardly curved or straight. Margin entire. Cuticle epistomatic, stomata in two distinct zones either side of wide stomata-free area across midvein. Stomata in ordered uniseriate rows parallel to long axis of leaf; rows rarely separated by more than one epidermal cell width. Stomata1 zones narrow, 2-3 rows wide. Stomata rounded in outline, amphicyclic; polar subsidiary cells two, square to rectangular, often shared between adjacent stomata of row; granular periclinal wall; lateral subsidiary cells two, rarely divided, crescentshaped, often shared or in contact with subsidiary cells of stomata in adjacent rows, periclinal wall granular. Guard cell cuticle rectangular in outline with distinct polar and lateral extensions. Lateral extensions thin towards outer edge. Epidermal cells rectangular, longer in non-stomatiferous areas, arranged in longitudinal files; periclinal walls granular, flat; anticlinal walls thin, smooth, slightly pitted along tapering edge. |
Measurements
No measurements are available
No ecological data are available
Age range: base of the Late/Upper Oligocene to the top of the Early/Lower Miocene or 27.30000 to 15.98000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Oligocene - Early/Lower Miocene | Australia (Tasmania) | Dacrycarpus lanceolatus (167314) |