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Petalaxis major
Taxonomy
Lithostrotionella maccoyana major was named by de Groot (1963).
It was recombined as Petalaxis major by Sando (1983).
It was recombined as Petalaxis major by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Lithostrotionella maccoyana major de Groot p. 83 figs. pl. 16, figs. 2a, b |
| 1983 | Petalaxis major Sando pp. 29 - 30 |
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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 major de Groot 1963
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter 5 to 9 mm and 17 to 22 major septa that closely approach the columella but seldom reach it and that commonly extend into the dissepimentarium. Minor septa well developed. Columella a simple axial plate, seldom dilated, con-nected to the counter septum. A few septal lamellae present in some corallites but no axial tabellae. Dissepimentarium composed of 1 to 3 rows of inflated dissepiments of varying sizes. Tabulae mostly in-complete, horizontal, concave, and irregularly spaced 0.25 to 0.5 mm apart. Ratio of tabularium width to cor-allite diameter about 0.6. Increase peripheral. |
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