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Petalaxis donbassica
Taxonomy
Lithostrotionella donbassica was named by Fomichev (1939).
It was recombined as Petalaxis donbassica by Sando (1983).
It was recombined as Petalaxis donbassica by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1939 | Lithostrotionella donbassica Fomichev p. 60 figs. pl. 9, figs. 4a, b |
| 1983 | Petalaxis donbassica Sando pp. 27 - 28 |
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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 donbassica Fomichev 1939
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter 5 to 7 mm and 14 to 17 major septa that approach the col-umella but seldom reach it and commonly extend into the dissepimelitarium. Minor septa well developed. Col-umella a strongly thickened axial plate ordinarily con-nected to the counter septum. Dissepimentarium com-. posed of 1 to 2 rows of inflated dissepiments of varying sizes. Tabulae ordinarily complete, horizontal, irregular-ly spaced 0.25 to 0.5 mm apart. Ratio of tabularium width to corallite diameter 0.5 to 0.6. 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