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Peiragraptinae
Taxonomy
Peiragraptinae was named by Jaanusson (1960). It is not extant.
It was assigned to Orthograptidae by Mitchell (1987).
It was assigned to Orthograptidae by Mitchell (1987).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Peiragraptinae Jaanusson |
| 1987 | Peiragraptinae Mitchell p. 381 |
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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.
Subfm. †Peiragraptinae Jaanusson 1960
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. E. Mitchell 1987 | Orthograptids with Pattern G or Pattern F primordial astogeny; strongly geniculate
thecae bearing genicular spines or flanges or both; rhabdosome generally aseptate and with fully sclerotized periderm. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Aberhan et al. 2004 | |||||
Age range: base of the Edenian to the top of the Maysvillian or 451.00000 to 449.60000 Ma
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Actonian - Onnian | Argentina | Geniculograptus sp. (8887) | |
| Katian | USA (New York) | Geniculograptus pygmaeus (204767) | |
| Edenian | USA (Kentucky) | Geniculograptus sp. (48779 48781) Geniculograptus typicalis (87844) | |
| Edenian - Maysvillian | USA (Michigan) | Climacograptus pygmaeus (26337 26338) | |
| Maysvillian | USA (Michigan) | Climacograptus pygmaeus (145605) |