Shamrock, Jamie L. (2010): A new calcareous nannofossil species of the genus Sphenolithus from the middle Eocene (Lutetian) and its biostratigraphic significance
Leg/Site/Hole:
Related Expeditions:
ODP 122
Identifier:
ID:
2011-019176
Type:
georefid
Creator:
Name:
Shamrock, Jamie L.
Affiliation:
University of Nebraska-Lincoln, Geosciences Department, Lincoln, NE, United States
Role:
author
Identification:
Title:
A new calcareous nannofossil species of the genus Sphenolithus from the middle Eocene (Lutetian) and its biostratigraphic significance
Year:
2010
Source:
Journal of Nannoplankton Research
Publisher:
International Nannoplankton Association, The Hague, International
Volume:
31
Issue:
1
Pages:
5-10
Abstract:
A high-resolution biostratigraphic study of Eocene calcareous nannofossils from Ocean Drilling Program (ODP) Leg 122 Hole 762C (Exmouth Plateau, western Australian shelf) has identified a new nannofossil species, Sphenolithus perpendicularis sp. nov. This species bears a double apical spine, similar to both S. furcatolithoides and S. capricornutus, but is distinguished by both optical properties and stratigraphic range. The range and distribution of S. perpendicularis sp. nov. is limited to nannofossil zone CP13a (equivalent to NP15a) at Hole 762C, and verified in sediments from Deep Sea Drilling Project Leg 77 Hole 538A and ODP Leg 159 Hole 960A. This suggests both a global distribution and a reasonably synchronous stratigraphic range. The optical properties and stratigraphic range of S. perpendicularis sp. nov. may suggest a taxonomic relationship to the S. anarrhopus-editus-spiniger lineage. This new species, in conjunction with S. furcatolithoides and S. cuniculus, may provide an alternate means for subdividing nannofossil zone CP13 (NP15).
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:23.5059 West:-85.2738 East:
112.1515 South:-19.5315
Keywords: Paleobotany; algae; Atlantic Ocean; biostratigraphy; Cenozoic; Deep Sea Drilling Project; DSDP Site 538; Eocene; Equatorial Atlantic; Exmouth Plateau; Gulf of Mexico; Indian Ocean; IPOD; Leg 122; Leg 159; Leg 77; Lutetian; microfossils; morphology; nannofossils; North Atlantic; Ocean Drilling Program; ODP Site 762; ODP Site 960; Paleogene; Plantae; Sphenolithus; Sphenolithus perpendicularis; taxonomy; Tertiary;
.