| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Amphicraspedum
Taxonomy
Amphicraspedum was named by Haeckel (1882). It was considered unknown by Nigrini (1967).
It was assigned to Euchitoniidae by Nigrini (1967); and to Radiolaria by Sanfilippo et al. (2003).
It was assigned to Euchitoniidae by Nigrini (1967); and to Radiolaria by Sanfilippo et al. (2003).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1882 | Amphicraspedum Haeckel |
| 1967 | Amphicraspedum Nigrini |
| 2003 | Amphicraspedum Sanfilippo et al. p. 54 |
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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
| Reference | Diagnosis | |
|---|---|---|
| C. Nigrini 1967 | Tribe: Euchitonida. Porodiscida with arms, the chambered arms being situated in the equatorial plane and radiating from the margin of the disk (often with terminal spines on the arms, and often with the arms joined by a patagium or chambered web). |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Kiessling 1999 | |||||
Age range: base of the Thanetian to the top of the Early/Lower Oligocene or 59.24000 to 27.30000 Ma
Collections (32 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Selandian - Thanetian | South Pacific | A. prolixum (258867) | |
| Thanetian | Cyprus | A. prolixum, A. murrayanum (90895) | |
| Thanetian - Eocene | South Pacific | A. prolixum (258865) | |
| Early/Lower Eocene | South Pacific | A. murrayanum (247371) A. prolixum (247369 247370) | |
| Ypresian | Cyprus | A. prolixum (90892 90894) A. prolixum, A. murrayanum (90893) | |
| Early/Lower Eocene - Middle Eocene | South Pacific | A. prolixum (247365 247366 247367) | |
| Eocene | South Pacific | A. prolixum (258857 258859) A. prolixum, A. murrayanum (258862) | |
| Eocene - Oligocene | South Pacific | A. prolixum (258856) | |
| M. formosa LOZ - M. aragonensis/M. subbotinae CRZ | South Pacific | A. prolixum (259858) | |
| M. aragonensis/M. subbotinae CRZ | South Pacific | A. prolixum, A. murrayanum (259856) | |
| A. cuneicamerata LOZ | South Pacific | A. prolixum, A. murrayanum (259855) | |
| Lutetian | Cyprus | A. prolixum (90890 90891) | |
| Middle Eocene | South Pacific | A. prolixum (247364 254229 254232 254236) | |
| M. lehneri PRZ | South Pacific | A. prolixum (259854) | |
| Bartonian | South Pacific | A. prolixum (247929 247930) | |
| Priabonian | South Pacific | A. prolixum (247923 247924 247926) | |
| Early/Lower Oligocene | South Pacific | A. prolixum (254212) |