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Petalaxis taishakuensis
Taxonomy
Lithostrotionella taishakuensis was named by Yokoyama (1957).
It was recombined as Petalaxis taishakuensis by Sando (1983).
It was recombined as Petalaxis taishakuensis by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Lithostrotionella taishakuensis Yokoyama p. 78 figs. pl. 10, figs. 1-4 |
| 1983 | Petalaxis taishakuensis Sando p. 29 |
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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.
†Petalaxis taishakuensis Yokoyama 1957
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter 3 to 4 mm and 13 to 15 major septa that ordinarily are short and do not extend to the columella and seldom extend in-to the dissepimentarium. Minor septa well developed. Columella· a simple axial plate connected to the counter septum and joined by 2 or 3 other major septa. Dissepi.mentarium composed of 1 to 2 rows of inflated dissepiments of varying sizes. Tabulae complete and incomplete, essentially horizontal, and irregularly spaced 0.25 to 1 mm apart. Ratio of tabularium width to cor-allite diameter about 0.6 to 0. 7. Mode of increase unknown. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Collections
No collection or age range data are available