| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Tetrapygus
Taxonomy
Tetrapygus was named by Agassiz (1841).
It was assigned to Arbaciidae by Grant and Hertlein (1938) and Fell and Pawson (1966); and to Arbacioida by Smith and Wright (1993).
It was assigned to Arbaciidae by Grant and Hertlein (1938) and Fell and Pawson (1966); and to Arbacioida by Smith and Wright (1993).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1841 | Tetrapygus Agassiz |
| 1938 | Tetrapygus Grant and Hertlein p. 21 |
| 1966 | Tetrapygus Fell and Pawson p. U413 |
| 1993 | Tetrapygus Smith and Wright |
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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: o = order, c = class, p = phylum | |||||
| References: Aberhan 1992, Smith 2009, Kiessling 2004 | |||||
Age range
Maximum range based only on fossils: Late/Upper Pleistocene or 0.12900 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 0.0117 Ma
Minimum age of oldest fossil (stem group age): 0.0117 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Pleistocene (interglacial) | Chile (Tarapaca) | T. niger (96672) |