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Pileolina
Taxonomy
Pileolina was named by Bermúdez (1952). It is extant. It was considered unknown by Bermúdez (1952).
It was assigned to Glabratellidae by Bermúdez (1952).
It was assigned to Glabratellidae by Bermúdez (1952).
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1952 | Pileolina Bermúdez p. 38 figs. 1-2 |
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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.
G. Pileolina Bermúdez 1952
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. J. Bermúdez 1952 | Shell small, trochoid, conical, ventral face flat or slightly concave; numerous chambers, somewhat diagonal, all visible on the dorsal face, only those of the last turn of the turn visible on the ventral face; calcareous wall, finely perforated; umbilical region with a hollow umbonal nodule; opening as a simple groove at the base of the last chamber between the umbo and the periphery. Dimension: 0.4 mm - Cretaceous to Recent.
This genus is very similar to Glabratella Dorreen from which it differs by having the umbilical region occupied by a hollow umbonal node and the opening as a groove located at the base of the last chamber in the space between the umbonal node and the periphery, while in Glabratella it has the opening in the umbilical region. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: Middle Miocene or 15.98000 to 11.63000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Miocene | Cuba | P. patelliformis (232852) |