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Heterosphaeridium heteracanthum
Taxonomy
Heterosphaeridium heteracanthum was named by Eisennack and Kjellström (1972). It is not extant.
Synonymy list
| Year | Name and author |
|---|---|
| 1972 | Heterosphaeridium heteracanthum Eisen and Kjell |
| 1972 | Heterosphaeridium heteracanthum Eisennack and Kjellström |
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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.
†Heterosphaeridium heteracanthum Eisennack and Kjellström 1972
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available
Age range: base of the Valanginian to the top of the Early/Lower Santonian or 139.80000 to 83.50000 Ma
Collections (24 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Valanginian - Barremian | Chile (Doceava Región) | Heterosphaeridium heteracanthum (150034) | |
| Albian - Cenomanian | Antarctica | Heterosphaeridium heteracanthum (153423) | |
| Cenomanian | Antarctica | Heterosphaeridium heteracanthum (153426 153428) | |
| Late/Upper Turonian - Early/Lower Coniacian | Antarctica | Heterosphaeridium heteracanthum (169324 169325 169326) | |
| Coniacian - Early/Lower Santonian | Antarctica | Heterosphaeridium heteracanthum (169335 169338 169339 169340 169341 169342 169343 169344 169346 169348 169349 169351 169352) | |
| Santonian - Campanian | Antarctica | Heterosphaeridium heteracanthum (150509 169354) | |
| Campanian | Antarctica | Heterosphaeridium heteracanthum (153425) | |
| Campanian - Maastrichtian | Antarctica | Heterosphaeridium heteracanthum (153427) |