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Tetracentronites panochetris
Taxonomy
Tetracentronites panochetris was named by Page (1968). It is considered to be a form taxon. Its type specimen is Stanford University Paleontology Type Collection 6855 and is a 3D body fossil. Its type locality is Del Puerto Canyon, which is in a Maastrichtian marine horizon in the Panoche Formation of California.
Synonymy list
| Year | Name and author |
|---|---|
| 1968 | Tetracentronites panochetris Page p. 170 figs. 7-9 |
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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.
†Tetracentronites panochetris Page 1968
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. M. Page 1968 | Vessels absent. Tracheids thick-
walled, radially flattened, make up bulk of tissue; pits observed only on radial walls, bordered, scalariform or round in uniseriate vertical rows with slit-like apertures. Tracheids avg 1740μ long (1568-2088 μ). Multiseriate rays up to eight cells wide and avg 2 mm in height (1-4 mm); cells thick-walled, square or upright; sheath-like cells present in wide rays. Uniseriates frequent, composed of vertical cells about 14 μ wide in tangential view, thin-walled. Pits between rays and tracheids round or slightly elongated horizontally in two or more vertical rows depending on width of tracheid. Parenchyma scanty, cross-walls slightly oblique to horizontal. Pith cells near primary xylem groups narrow and high in longitudinal section, increasing in total size toward center. Multiseriate rays delimit primary xylem bundles, |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 2009 | |||||
Age range: Maastrichtian or 72.10000 to 66.00000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Maastrichtian | USA (California) | Tetracentronites panochetris (type locality: 191732) |