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Taxonomy
Trigonocercella was named by Hintze (1953) [Sepkoski's age data: O Aren-l Sepkoski's reference number: 795]. It is not extant. Its type is Trigonocercella acuta.
It was assigned to Isotelinae by Harrington et al. (1959); to Asaphida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002).
It was assigned to Isotelinae by Harrington et al. (1959); to Asaphida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002).
Species
T. acuta (type species)
Entered
by J. Sepkoski on 2003-01-23; modified by M. Hopkins on 2013-10-27
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Trigonocercella Hintze p. 239 |
| 1959 | Trigonocercella Harrington et al. p. O343 |
| 2002 | Trigonocercella Jell and Adrain p. 455 |
| 2002 | Trigonocercella Sepkoski |
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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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009, Hendy et al. 2009 | |||||
Age range: Blackhillsian or 475.30000 to 471.30000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Blackhillsian | USA (Utah) | T. acuta (63810 63839) |