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Taxonomy
Porterfieldia jachalensis was named by Harrington and Leanza (1957). It is not extant.
It was recombined as Triarthrus jachalensis by Waisfeld and Vaccari (2003), Edgecombe et al. (2005).
It was recombined as Triarthrus jachalensis by Waisfeld and Vaccari (2003), Edgecombe et al. (2005).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1957 | Porterfieldia jachalensis Harrington and Leanza p. 119 |
| 1978 | Porterfieldia jachalensis Fortey and Owens p. 243 |
| 1983 | Porterfieldia jachalensis Ludvigsen and Tuffnell p. 573 |
| 1995 | Porterfieldia jachalensis Baldis and Poethe p. 415 |
| 2003 | Triarthrus jachalensis Waisfeld and Vaccari pp. 310-311 figs. pl. 14, figs. 15-18 |
| 2005 | Triarthrus jachalensis Edgecombe et al. p. 107 |
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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.
†Triarthrus jachalensis Harrington and Leanza 1957
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004 | |||||
Age range: Costonian or 458.20000 to 457.20000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Costonian | Argentina (San Juan) | Triarthrus jachalensis (70622 70623 70626 73368 73380 115231) | |
| Sandbian | Argentina (San Juan) | Triarthrus jachalensis (73378 73379 73388 120528) | |
| Caradoc | Argentina (San Juan) | Porterfieldia jachalensis (116112) |