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Pionaspis
Taxonomy
Pionaspis was named by Denison (1964) [Sepkoski's age data: D Gedi Sepkoski's reference number: 1100].
It was assigned to Pteraspidomorphes by Sepkoski (2002); and to Cyathaspididae by Sallan et al. (2018).
It was assigned to Pteraspidomorphes by Sepkoski (2002); and to Cyathaspididae by Sallan et al. (2018).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1964 | Pionaspis Denison |
| 2002 | Pionaspis Sepkoski |
| 2018 | Pionaspis Sallan et al. pp. Supplementary tables |
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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. †Pionaspis Denison 1964
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†Pionaspis acuticosta Denison 1964
†Pionaspis amplissima Dineley and Loeffler 1976
†Pionaspis ebenina Thorsteinsson and Elliott 2022
†Pionaspis rossi Thorsteinsson and Elliott 2022
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Carroll 1988, Kiessling 2004, Bambach et al. 2007 | |||||
Age range: base of the Ludlow to the top of the Early/Lower Lochkovian or 426.70000 to 416.80000 Ma
Collections (10 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ludlow - Pridoli | Canada (Nunavut) | P. sp. (237779) | |
| Lochkovian - Early/Lower Lochkovian | Canada (Northwest Territories) | P. amplissima (237846 237847 237849) | |
| Lochkovian | Canada (Nunavut) | P. acuticosta (237783) P. sp. (237785 237786 238042) | |
| Lochkovian - Early/Lower Emsian | Canada (Northwest Territories) | P. amplissima (237829 237843) |