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Platysiagidae
Taxonomy
Platysiagidae was named by Brough (1939).
It was assigned to Palaeoniscoidea by Gardiner (1960); and to Perleidiformes by Bürgin (1992) and Nelson et al. (2016).
It was assigned to Palaeoniscoidea by Gardiner (1960); and to Perleidiformes by Bürgin (1992) and Nelson et al. (2016).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1939 | Platysiagidae Brough |
| 1960 | Platysiagidae Gardiner p. 256 |
| 1992 | Platysiagidae Bürgin p. 54 |
| 2016 | Platysiagidae Nelson et al. p. 116 |
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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.
Fm. †Platysiagidae Brough 1939
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G. †Helmolepis Stensiö 1932
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†Helmolepis cyphognathus Neuman and Mutter 2005
†Helmolepis gracilis Stensiö 1932
†Helmolepis manis Mutter 2005
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| Reference: Carroll 1988 | |||||
Age range: Smithian or 251.30000 to 247.20000 Ma
Collections (10 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Griesbachian | Greenland | Helmolepis gracilis (120896 130539 130540 130541 130543) | |
| Smithian | Canada (British Columbia) | Helmolepis cyphognathus (90301 105083 119093 119094) | |
| Dienerian | Madagascar | Helmolepis manis (130542) |