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Petalaxis elyensis
Taxonomy
Eastonoides elyensis was named by Wilson and Langenheim (1962). Its type specimen is UCMP 35654 and is a 3D body fossil. Its type locality is UCMP B-6199, Water Canyon, which is in an Asselian shallow subtidal limestone in the Ferguson Mountain Formation of Nevada.
It was recombined as Petalaxis elyensis by Sando (1983) and Fedorowski et al. (2007).
It was recombined as Petalaxis elyensis by Sando (1983) and Fedorowski et al. (2007).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1962 | Eastonoides elyensis Wilson and Langenheim, Jr. p. 512 figs. Pl 88, figs 4-6 |
| 1962 | Lithostrotionella brokawi Wilson and Langenheim, Jr. p. 512 figs. Pl 88, figs 7,8 |
| 1983 | Petalaxis brokawi Sando p. 28 |
| 1983 | Petalaxis elyensis Sando p. 35 |
| 2007 | Petalaxis elyensis Fedorowski et al. p. 165 |
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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 elyensis Wilson and Langenheim, Jr. 1962
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Invalid names: Lithostrotionella brokawi Wilson and Langenheim, Jr. 1962 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. J. Sando 1983 | Petalaxis with corallite diameter 4 to 5 mm and 10 to 15 major septa that extend about halfway to the columella. Major septa are attached to the cor-allite wall except where impersistent lonsdaleoid dissepiments are present. Minor septa poorly developed, contratingent. Columella a thickened axial plate con-nected to the counter septum and augmented by rare im-persistent vertical axial tabellae and very rare septal lamellae. Dissepimentarium consists of a single row of impersistent inflated dissepiments. Tabulae mostly com-plete, generally flat, locally sagging or domed, and spaced 0.5 to 1 mm apart. Tabularium width equals cor-allite diameter, except where dissepiments are developed. Mode of increase unknown. | |
| W. J. Sando 1983 (Petalaxis brokawi) | Petalaxis with corallite diameter 4 to 5 mm and 10 to 15 major septa that ordinarily are short and do not extend to the columella and seldom extend in-to the dissepimentarium. Minor septa ordinarily well developed. Columella a simple thickened axial plate or-dinarily connected to the counter septum. Dissepimen-tarium composed of 1 to 2 rows of mostly large inflated dissepiments. Tabulae mostly complete, inclined slightly toward columella, and irregularly spaced 0.25 to 0.5 mm apart. Ratio of tabularium width to corallite diameter about 0;5. Mode of increase unknown. |