overview (8)
Arkhangelskiales (2)
Eiffellithales (3)
Holococcoliths (26)
Nannoliths (10)
Podorhabdales (7)
Watznaueriales (1)
Sphenolithus anarrhopus Bukry & Bramlette 1969
Description: Medium sized (height 6.2-9.2 µm) with short to relatively long spine that is slightly asymmetrical and dark at 0°. Square-shaped base with near-equidimensional quadrants and deep spine insertion.
Remarks: Similar to Sphenolithus radians but the spine is completely dark at 0°.
Paleogene: Sphenolithus anarrhopus
| Year of Publication | Authors | Title |
|---|---|---|
| 1969 | Bukry, D, Bramlette MN | Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. |