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Petalaxis tschucoticus
Taxonomy
Lithostrotionella tschucotica was named by Onoprienko (1976).
It was recombined as Petalaxis tschucoticus by Sando (1983).
It was recombined as Petalaxis tschucoticus by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Lithostrotionella tschucotica Onoprienko p. 30 figs. pl. 10, fig. 6, pl. 11, figs. 1, 2 |
| 1983 | Petalaxis tschucoticus Sando p. 27 |
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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 tschucoticus Onoprienko 1976
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter 5 to 7 mm and 15 to 17 major septa that ordinarily extend to the columella but seldom extend into the dissepimen-tarium. Minor septa poorly developed. Columella a sim-ple axial plate connected to cardinal and counter septa. Dissepimentarium composed of a single row of large in-flated dissepiments. Tabulae ordinarily complete, horizontal, commonly turned up at columella, regularly spaced 0.3 to 0.5 mm apart. Ratio of tabularium width to corallite diameter about 0.5 to 0.6. Mode of increase unknown. |