Varol Research | Sphenolithus spiniger

Set number: 857

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10µm

Sphenolithus spiniger, Middle Eocene, ODP Leg 171B, Site 1051A, Black Nose, Western North Atlantic

Set number: 856

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10µm

Sphenolithus spiniger, Middle Eocene, Arabian Peninsula (The specific location cannot be disclosed)

Set number: 4585

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10µm

Sphenolithus spiniger, Middle Eocene, DSDP Leg 39, Sites 354, Ceará Rise, North Atlantic Ocean

Final Epithet

Sphenolithus spiniger Bukry, 1971b

Basionym

Sphenolithus spiniger Bukry, 1971b

References

Bukry, D. 1971b. Cenozoic calcareous nannofossils from the Pacific Ocean. - San Diego Society of Natural History Transactions 16: 303-327.

Taxonomy

Sphenolithus

biconical clustered apical cycle

bouquet-shaped, clustered apical cycles

four or more-bladed apical spines

monolithic apical spine (with parallel extinction)

multiple apical spines

paired diverging apical spines

Sphenolithus capricornutus

paired radiating apical spines

Biostratigraphy

Stratigraphic Range

Ypresian - Bartonian

Age (Ma)

48.70 - 40.60

Holotype

Sphenolithus spiniger Bukry, 1971

Middle Eocene

DSDP Leg 6, Site 44, Horizon Ridge, northwestern Pacific Ocean.