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Petalaxis ivanovi
Taxonomy
Lonsdaleia ivanovi was named by Dobrolyubova (1935).
It was recombined as Petalaxis ivanovi by Sando (1983).
It was recombined as Petalaxis ivanovi by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Lonsdaleia ivanovi Dobrolyubova p. 12 figs. pl. 11, figs. 1, 2 |
| 1983 | Petalaxis ivanovi Sando p. 36 |
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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 ivanovi Dobrolyubova 1935
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | etalaxis with corallite diameter 6 to 6.5 mm and 13 to 14 major septa that closely approach the columella but seldom reach it. Major septa are attached to the corallite wall, except where impersistent lonsdaleoid dissepiments are present. Minor septa well developed. Columella ranging from a simple axial plate to a complex structure consisting of axial plate, vertical axial tabellae, and a few septal lamellae commonly rein-forced by stereoplasm to form a thick rod or netlike structure in transverse section. Dissepimentarium im-persistent, composed of a single row of dissepiments of varying sizes where present. Tabulae mostly incom-plete, horizontal, flat, concave, or convex, and irregular-ly spaced 0.25 to 1 mm apart. Tabularium width equals corallite diameter except where dissepiments are pres-ent. 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