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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Atlantic Ocean
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Equatorial Atlantic (1)
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Mid-Atlantic Ridge (1)
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North Atlantic
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Ceara Rise (1)
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Little Bahama Bank (1)
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Northwest Atlantic (1)
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Sierra Leone Rise (1)
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South Atlantic
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Angola Basin (1)
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Indian Ocean
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Exmouth Plateau (1)
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Pacific Ocean
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East Pacific
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Northeast Pacific (1)
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Southeast Pacific
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Nazca Ridge (1)
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Equatorial Pacific (2)
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North Pacific
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Northeast Pacific (1)
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Northwest Pacific (2)
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South Pacific
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Southeast Pacific
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Nazca Ridge (1)
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West Pacific
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Northwest Pacific (2)
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Ontong Java Plateau (2)
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fossils
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Invertebrata
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Protista
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Foraminifera (2)
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microfossils (2)
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geologic age
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Cenozoic
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Tertiary
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Neogene
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Miocene
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lower Miocene (1)
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Paleogene
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Oligocene
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upper Oligocene (1)
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Primary terms
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Atlantic Ocean
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Equatorial Atlantic (1)
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Mid-Atlantic Ridge (1)
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North Atlantic
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Ceara Rise (1)
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Little Bahama Bank (1)
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Northwest Atlantic (1)
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Sierra Leone Rise (1)
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South Atlantic
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Angola Basin (1)
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Cenozoic
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Tertiary
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Neogene
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Miocene
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lower Miocene (1)
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Paleogene
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Oligocene
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upper Oligocene (1)
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Deep Sea Drilling Project
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IPOD
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Leg 73
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DSDP Site 522 (1)
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Leg 82
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DSDP Site 558 (1)
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Leg 41
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DSDP Site 366 (1)
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Leg 9
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DSDP Site 78 (1)
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Indian Ocean
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Exmouth Plateau (1)
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Integrated Ocean Drilling Program
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Expedition 342
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IODP Site U1406 (1)
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Invertebrata
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Protista
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Foraminifera (2)
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Ocean Drilling Program
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Leg 101
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ODP Site 628 (1)
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Leg 108
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ODP Site 667 (1)
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Leg 122
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ODP Site 763 (1)
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Leg 130
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ODP Site 803 (2)
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Leg 150
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ODP Site 904 (1)
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Leg 154
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ODP Site 926 (1)
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ODP Site 929 (1)
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Leg 199
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ODP Site 1218 (1)
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ODP Site 1219 (1)
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Leg 202
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ODP Site 1237 (1)
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Pacific Ocean
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East Pacific
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Northeast Pacific (1)
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Southeast Pacific
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Nazca Ridge (1)
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Equatorial Pacific (2)
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North Pacific
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Northeast Pacific (1)
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Northwest Pacific (2)
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South Pacific
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Southeast Pacific
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Nazca Ridge (1)
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West Pacific
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Northwest Pacific (2)
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Ontong Java Plateau (2)
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Oligocene Planktic Foraminiferal Taxonomy and Evolution: An Illustrated Revision of Ocean Drilling Program Site 803
Precision in Biostratigraphy: Evidence For a Temporary Flow Reversal in the Central American Seaway During Or After the Oligocene-miocene Transition
TAXONOMY, BIOSTRATIGRAPHY, AND PHYLOGENY OF OLIGOCENE AND EARLY MIOCENE PARAGLOBOROTALIA AND PARASUBBOTINA
ABSTRACT The taxonomy, phylogeny, and biostratigraphy of Oligocene and early Miocene Paragloborotalia and Parasubbotina are reviewed. The two genera are closely related; Paragloborotalia was derived from Parasubbotina in the early Eocene. Parasubbotina was more diverse during the middle Eocene, while Paragloborotalia experienced considerable diversification during the mid-Oligocene and in the latest Oligocene-earliest Miocene. A significant finding has been the synonymization of Globorotalia ( Tuborotalia ) mendacis Blow, and Turborotalia primitiva Brönnimann and Resig with Globorotalia birnageae Blow. The following species from the time interval of interest are regarded as valid: Paragloborotalia acrostoma (Wezel), Paragloborotalia birnageae (Blow), Paragloborotalia continuosa (Blow), Paragloborotalia incognita (Walters) Paragloborotalia kugleri (Bolli), Paragloborotalia mayeri (Cushman and Ellisor), Paragloborotalia nana (Bolli), Paragloborotalia opima (Bolli), Paragloborotalia pseudocontinuosa (Jenkins), Paragloborotalia pseudokugleri (Blow), Paragloborotalia semivera (Hornibrook), Paragloborotalia siakensis (LeRoy), Parasubbotina hagni (Gohrbandt), and Parasubbotina varianta (Subbotina). Paragloborotalia is a long-lived group of planktonic foraminifera that spanned the early Eocene to late Miocene and provided the root stock for the evolution of multiple smooth, nonspinose, and keeled globorotaliid lineages during the Neogene. The early Oligocene forms of Paragloborotalia (nana, opima, siakensis, pseudocontinuosa ) have 4 or 5 globular chambers in the final whorl with radial spiral sutures and a broadly rounded periphery. A trend from radial to curved spiral sutures is observed in late Oligocene and earliest Miocene lineages. Most species of Paragloborotalia had wide distributions, but some were more common in tropical to warm subtropical waters (e.g., siakensis, kugleri ) and were especially dominant in the equatorial Pacific divergence zone (e.g., nana, opima, and pseudocontinuosa ) analogous to modern tropical upwelling Neogloboquadrina. Other species thrived in cool subtropical and temperate waters (e.g., acrostoma, incognita ).
TAXONOMY, BIOSTRATIGRAPHY, AND PHYLOGENY OF OLIGOCENE AND LOWER MIOCENE DENTOGLOBIGERINA AND GLOBOQUADRINA
ABSTRACT The taxonomy, phylogeny, and biostratigraphy of Oligocene and lower Miocene Dentoglobigerina and Globoquadrina are reviewed. Because of the discovery of spine holes in various species assigned to these genera, the entire group is now considered to have been fully or sparsely spinose in life and hence part of Family Globigerinidae. One new species, Dentoglobigerina eotripartita Pearson, Wade, and Olsson n. sp., is named. Dentoglobigerina includes forms with and without umbilical teeth and species for which the presence or absence of a tooth is a variable feature. A significant finding has been the triple synonymy of Globigerina tripartita Koch, Globigerina rohri Bolli, and Globoquadrina dehiscens praedehiscens Blow, which greatly simplifies part of the taxonomy. The genus Globoquadrina is restricted to its type species, Globigerina dehiscens Chapman and others. The following species from the time interval of interest are regarded as valid: Dentoglobigerina altispira (Cushman and Jarvis), Dentoglobigerina haroemoenensis (LeRoy), Dentoglobigerina binaiensis (Koch), Dentoglobigerina eotripartita Pearson, Wade, and Olsson n. sp., Dentoglobigerina galavisi (Bermúdez), Dentoglobigerina globosa (Bolli), Dentoglobigerina globularis (Bermúdez), Dentoglobigerina juxtabinaiensis Fox and Wade, Dentoglobigerina larmeui (Akers), Dentoglobigerina prasaepis (Blow), Dentoglobigerina pseudovenezuelana (Blow and Banner), Dentoglobigerina sellii (Borsetti), Dentoglobigerina taci Pearson and Wade, Dentoglobigerina tapuriensis (Blow and Banner), Dentoglobigerina tripartita (Koch), Dentoglobigerina venezuelana (Hedberg), and Globoquadrina dehiscens (Chapman, Parr, and Collins). The genus Dentoglobigerina also comprises other Neogene/Quaternary species not listed, including the living species Dentoglobigerina cf. conglomerata (Schwager).