| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Pseudomegachasma
Taxonomy
Pseudomegachasma was named by Shimada et al. (2015). Its type is Eorhincodon casei.
It was assigned to Johnlonginae by Shimada et al. (2015).
It was assigned to Johnlonginae by Shimada et al. (2015).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1999 | Eorhincodon Nessov |
| 2015 | Pseudomegachasma Shimada et al. p. 4 |
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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. †Pseudomegachasma Shimada et al. 2015
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†Pseudomegachasma casei Nessov 1999
†Pseudomegachasma comanchensis Shimada 2007
Invalid names: Eorhincodon Nessov 1999 [replaced]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Carroll 1988, Wagner 2023, Hendy et al. 2009 | |||||
Age range: Early/Lower Cenomanian or 100.50000 to 93.90000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Albian - Cenomanian | Russian Federation (Belgorod) | Eorhincodon sp. (32314) | |
| Cenomanian | Russian Federation (Penza) | P. casei (213397 213398) | |
| Early/Lower Cenomanian | Russian Federation (Belgorod) | Eorhincodon casei (213391) | |
| Early/Lower Cenomanian | Russian Federation (Volgograd) | P. casei (213392) | |
| Late/Upper Cenomanian | Russian Federation (Saratov) | P. casei (213393 213394 213395 213396) | |
| Middle Cenomanian | USA (Colorado) | Johnlongia sp. (35429) Megachasma comanchensis (213403) | |
| Late/Upper Cenomanian - Early/Lower Turonian | USA (Texas) | P. comanchensis (213399) |