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Petalaxis mokomokensis
Taxonomy
Lithostrotion (Lithostrotionella) mokomokensis was named by Easton (1960). Its type specimen is USC 5119 and is a 3D body fossil. Its type locality is USC Loc. 330 - Mokomoke Ridge, which is in an Artinskian open shallow subtidal limestone in the Arcturus Formation of Nevada.
It was recombined as Petalaxis mokomokensis by Sando (1983) and Fedorowski et al. (2007).
It was recombined as Petalaxis mokomokensis by Sando (1983) and Fedorowski et al. (2007).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Lithostrotion (Lithostrotionella) mokomokensis Easton p. 578 fig. 9,10 |
| 1983 | Petalaxis mokomokensis Sando p. 28 |
| 2007 | Petalaxis mokomokensis Fedorowski et al. p. 166 |
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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 mokomokensis Easton 1960
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter about 7 mm and 15 major septa that ordinarily are short and do not extend to the columella or into the dissepimen-tarium. Minor septa poorly developed. Columella a thin axial plate connected to the counter septum. Dissepimentarium composed of 1 to 2 rows of large in-flated dissepiments. Tabulae complete and incomplete, essentially horizontal, mostly concave, irregularly spaced 0.25 to 0. 75 mm apart. Ratio of tabularium width to corallite diameter about 0.7. Mode of increase unknown. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| Reference: Kiessling 2004 | |||||
Age range: Artinskian or 290.10000 to 279.30000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Artinskian | USA (Nevada) | Lithostrotion mokomokensis (type locality: 107561 107577 107579) |