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Morphological Attributes: Spines: spinose Microstructure: macroperforate Texture: cancellate irregular Coiling: trochospiral Spire: low / Umbilical depth: neither deep nor shallow Chamberform on the umbilical side: subspherical to trapezoid Keel: no keel / Lip: no lip or rim / Tooth: no tooth First occurence: 009.70 / Last occurence: 005.53 |
identified by scientist Neogene Pliocene off California and Mexico DSDP Leg 63 FEU-1009610 |  |