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Retitricolpites absolutus
Taxonomy
Retitricolpites absolutus was named by Jaramillo and Dilcher (2001). It is considered to be a form taxon. Its type specimen is UFP 44, 4.8 x 104.4, a microspore (Pollen grain), and it is a compression fossil. Its type locality is Pinalerita UFP 44, Llanos foothills, Colombia, which is in an Eocene fluvial-deltaic claystone/mudstone in the San Fernando Formation of Colombia.
It was recombined as Poloretitricolpites absolutus by Jaramillo and Dilcher (2001).
It was recombined as Poloretitricolpites absolutus by Jaramillo and Dilcher (2001).
Synonymy list
| Year | Name and author |
|---|---|
| 1967 | Retitricolpites absolutus González-Guzmán p. 31 figs. Plate 1 figs. 8 - 8f |
| 2001 | Poloretitricolpites absolutus Jaramillo and Dilcher |
| 2001 | Retitricolpites absolutus Jaramillo and Dilcher p. 140 figs. Plate 14, Figs. 2-3 |
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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.
†Retitricolpites absolutus Jaramillo and Dilcher 2001
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. E. González-Guzmán 1967 | Pollen grain tricolpate, spheroidal; furrow C α 2, C β 2, C γ 1. Sculpture type reticulate (diameter of lumina 1 μ). Polar area rather large. Grain provided with costar colpi. Thickness of exine about 1.5 μ. (incl. reticulum). Equatorial zone tectate and psilate-foveolate, but polar zones per-reticulate. Muri with perfoate tectum. Reticulum diminishes towards equatorial zone, where sculpture becomes foveate-psilate. Ectexine thicker than endexine. | |
| C. A. Jaramillo and D. L. Dilcher 2001 | Tricolpate, mid sized (27 µm), subprolate, exine thick, tectate, colpi short, costate, psilate at equator, foveolate-reticulate at poles. |
Measurements
| part | N | mean | |||||
|---|---|---|---|---|---|---|---|
| Pollen grain diameter | 1 | 0.028 |
No ecological data are available
Age range: base of the Early/Lower Eocene to the top of the Middle Eocene or 55.80000 to 37.71000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Eocene | Colombia (Norte de Santander) | Retitricolpites absolutus (136756 136759) | |
| Middle Eocene | Colombia (Norte de Santander) | Retitricolpites absolutus (136828) |