| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Megachasma
Taxonomy
Megachasma was named by Taylor et al. (1983). It is extant.
It was assigned to Megachasmidae by Compagno (2005), Shimada et al. (2014), Landini et al. (2019).
It was assigned to Megachasmidae by Compagno (2005), Shimada et al. (2014), Landini et al. (2019).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1983 | Megachasma Taylor et al. |
| 2005 | Megachasma Compagno |
| 2014 | Megachasma Shimada et al. |
| 2019 | Megachasma Landini et al. p. 358 |
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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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, subp = subphylum | |||||
| References: Carroll 1988, Purdy 1988 | |||||
Age range: base of the Chattian to the top of the Pleistocene or 27.30000 to 0.01170 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chattian | USA (California) | M. applegatei (11601) | |
| Chattian | USA (Oregon) | M. applegatei (45788) | |
| Aquitanian | USA (Oregon) | M. applegatei (169440) | |
| Aquitanian | USA (California) | M. applegatei (58899 169441) | |
| Aquitanian - Langhian | USA (North Carolina) | M. sp. (48887) | |
| Neogene - Pleistocene | Japan (Okinawa) | M. pelagios (227299) | |
| Burdigalian | Peru (Ica) | M. applegatei (100330) | |
| Early/Lower Pliocene | Italy (Tuscany) | M. pelagios (228149) | |
| Zanclean | USA (North Carolina) | M. sp. (52582) | |
| Piacenzian - Zanclean | Belgium | M. sp. (32146) |