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Petalaxis stylaxis
Taxonomy
Lithostrotion stylaxis was named by Trautschold (1879).
It was recombined as Petalaxis stylaxis by Sando (1983).
It was recombined as Petalaxis stylaxis by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1879 | Lithostrotion stylaxis Trautschold p. 36 figs. pl. 5, figs. 6a-c |
| 1983 | Petalaxis stylaxis Sando p. 34 |
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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 stylaxis Trautschold 1879
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter 3.5 to 9 mm and 11 to 18 major septa that approach the col-umella but seldom reach it and seldom extend into the dissepimentarium. Minor septa absent to well developed. Columella ranging from a simple axial plate ordinarily connected to the counter septum to a complex structure in which the axial plate is augmented by im-persistent vertical axial tabellae and rare septal lamellae. Dissepimentarium composed of 1 to 3 rows of inflated dissepiments of varying sizes. Tabulae complete and incomplete, horizontal, flat, concave or convex, and irregularly spaced 0.25 to 2 mm apart. Ratio of tabularium width to corallite diameter 0.4 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