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Petalaxis maccoyanus
Taxonomy
Stylaxis mcoyana was named by Milne-Edwards and Haime (1851).
It was recombined as Petalaxis mcoyana by Milne-Edwards and Haime (1852), Milne-Edwards (1860) and Roemer (1883); it was recombined as Lithostrotion maccoyanum by Eichwald (1861) and Bassler (1953); it was recombined as Lithostrotionella maccoyana by de Groot (1963); it was recombined as Petalaxis mccoyana by Fedorowski and Gorianov (1973) and Sutherland (1977); it was recombined as Petalaxis maccoyanus by Sando (1983).
It was recombined as Petalaxis mcoyana by Milne-Edwards and Haime (1852), Milne-Edwards (1860) and Roemer (1883); it was recombined as Lithostrotion maccoyanum by Eichwald (1861) and Bassler (1953); it was recombined as Lithostrotionella maccoyana by de Groot (1963); it was recombined as Petalaxis mccoyana by Fedorowski and Gorianov (1973) and Sutherland (1977); it was recombined as Petalaxis maccoyanus by Sando (1983).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1851 | Stylaxis mcoyana Milne-Edwards and Haime p. 453 figs. pl. 12, figs. 5, 5a |
| 1852 | Petalaxis mcoyana Milne-Edwards and Haime p. 205 |
| 1860 | Petalaxis mcoyana Milne-Edwards p. 440 |
| 1861 | Lithostrotion maccoyanum Eichwald p. 150 |
| 1883 | Petalaxis mcoyana Roemer |
| 1953 | Lithostrotion maccoyanum Bassler p. 222 |
| 1963 | Lithostrotionella maccoyana de Groot |
| 1973 | Petalaxis mccoyana Fedorowski and Gorianov p. 58 figs. pl. 12, figs. 4a, b, text-figs. 20a, b |
| 1977 | Petalaxis mccoyana Sutherland p. 185 figs. figs. 1-7 |
| 1983 | Petalaxis maccoyanus 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 maccoyanus Milne-Edwards and Haime 1851
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with maximum corallite diameter 5.4 to 7.8 mm and 13 to 18 major septa that ap-proach the columella but seldom reach it and seldom ex-tend into the dissepimentarium. Minor septa poorly developed. Columella a thickened axial plate connected to the counter septum augmented in some corallites by vertical axial tabellae and rare, poorly developed septal lamellae. Dissepimentarium composed of 1 to 2 rows of small inflated dissepiments Tabulae mostly incomplete, essentially horizontal, flat, concave, or convex, and irregularly spaced 0.5 to 1 mm apart. Ratio of tabularium width to corallite diameter about 0.6. Increase peripheral. |