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Isonychiidae
Taxonomy
Isonychiidae was named by Burks (1953). It is extant.
It was reranked as the subfamily Isonychiinae by Burks (1953), Lewis (1977).
It was assigned to Baetida by Burks (1953); to Ephemeroptera by Demoulin (1968); to Siphlonuridae by Lewis (1977); and to Eusetisura by Kluge (2004).
It was reranked as the subfamily Isonychiinae by Burks (1953), Lewis (1977).
It was assigned to Baetida by Burks (1953); to Ephemeroptera by Demoulin (1968); to Siphlonuridae by Lewis (1977); and to Eusetisura by Kluge (2004).
Subtaxa
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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. Isonychiidae Burks 1953
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, p = phylum | |||||
| References: Bush and Bambach 2015, Kiessling 2004 | |||||
Age range
Maximum range based only on fossils: Whitneyan or 31.80000 to 29.50000 Ma
Minimum age of oldest fossil (stem group age): 29.5 Ma
Minimum age of oldest fossil (stem group age): 29.5 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Oligocene | USA (Montana) | Isonychia sp. (23793) | |
| Whitneyan | USA (Montana) | Isonychia alderensis (120623) |