| 释义 |
- References
{{Italic title}}{{Taxobox
| name = Cuneus
| fossil_range = mid Late Cretaceous to Paleocene
| domain = Eukaryota
| unranked_regnum = SAR
| unranked_subregnum = Rhizaria
| superphylum = Retaria
| phylum = Foraminifera
| ordo = Rotaliida
| superfamilia = Turrilinacea
| familia = Turrilinidae
| genus = Cuneus
| genus_authority = Voloshina, 1974
}}Cuneus is a genus of foraminifera in the Rotaliida found in Upper Cretaceous (Coniacian) to Paleocene marine sediments throughout the boreal regions. The test is pyramidal in form, triserial throughout, with a triangular section, and may be slightly twisted. The test wall is calcareous, transparent. and finely perforate, the surface smooth. Sides are flat to slightly concave; sutures flush and oblique. The aperture is a narrow vertical loop on the apertural face of the final chamber. References - Alfred R. Loeblich Jr and Helen Tappan,1988. Forminiferal Genera and their Classification. Van Nostrand Reinhold.
{{Taxonbar|from=Q5194254}} 4 : Turrilinidae|Rotaliida genera|Late Cretaceous genus first appearances|Paleocene genus extinctions |