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Perissopyge
Taxonomy
Perissopyge was named by Blaker et al. (1996). Its type is Perissopyge phenax.
It was assigned to Aldonaiidae by Jell and Adrain (2002); and to Trilobita by Blaker et al. (1996), Stein and Peel (2008).
It was assigned to Aldonaiidae by Jell and Adrain (2002); and to Trilobita by Blaker et al. (1996), Stein and Peel (2008).
Species
P. phenax (type species), P. triangulata
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Perissopyge Blaker et al. |
| 2002 | Perissopyge Jell and Adrain p. 424 |
| 2008 | Perissopyge Stein and Peel |
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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.
G. †Perissopyge Blaker et al. 1996
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†Perissopyge phenax Blaker et al. 1996
†Perissopyge triangulata Blaker et al. 1996
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Stein and J. S. Peel 2008 | One diagnostic pygidial character of Perissopyge
not mentioned in the original description (Blaker et al. 1997) is that the two anterior pleural bands of the pygidium are laterally drawn out into small, posteriorly directed spines, best seen in well-preserved material of the type species, Perissopyge phenax (Fig. 4C). It can be confirmed even for P. triangulata from Nevada (Fig. 2A). |
Measurements
No measurements are available
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| Source: c = class | |||||
| Reference: Aberhan et al. 2004 | |||||
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Cambrian | Greenland | P. sp. (93093) | |
| Lenian | Greenland (Peary Land) | P. phenax (49892 49893 49894) | |
| Dyeran | USA (Nevada) | P. triangulata (7787) | |
| Dyeran | Canada (Yukon) | P. phenax (93092) | |
| Toyonian | Greenland | P. phenax (8092) |