Abstract This paper describes and illustrates the foraminifera from Moorea, French Polynesia. Moorea, a high volcanic island in the south-central Pacific Ocean, is situated east of the tropical marine diversity hotspot in the Coral Triangle. It is significant as a recipient and redistributor of biotas by equatorial currents. The region thus represents a key area and stepping stone for transpacific faunal exchange, yet the foraminiferal fauna of Moorea has not been documented completely. We have conducted a comprehensive island-wide survey on modern, shallow-water benthic foraminifera to document the diversity, structure and composition of faunal assemblages from barrier reef, fringing reef, lagoon and bay inlet, and marsh and mangrove habitats. Here we present a fully illustrated atlas of benthic foraminifera from these shallow water habitats on Moorea and document patterns of species richness and spatial distribution. A total of 515 taxa were recorded, a number that almost triples previous species counts. The foraminiferal species are systematically described and illustrated on 33 plates by high-resolution scanning electron microscopy images. Coral reef calcifiers face an uncertain future due to global warming, pollution and coastal development. Foraminifera are prolific producers of reef carbonates, contribute significantly to the reef carbonate budget and are excellent indicators of water quality and reef health. The taxa described in this atlas originate from samples collected in 1992 at depths between 1 and 40 meters and provide a baseline for future studies of environmental change. The large number of species identified also provides a means to assess similarities among biogeographic regions across the Pacific Ocean. This is the first complete survey and documentation of benthic reef foraminifera from Moorea, Society Islands.

ABSTRACT The distribution and taxonomy of modern benthic foraminifera are described for the western Sunda Shelf, southern South China Sea off northeast peninsular Malaysia. This study provides baseline foraminiferal data that can be utilized in paleoenvironmental reconstructions of Neogene sediments from the Sunda Shelf and elsewhere in the Indo-Pacific. The uppermost centimeter of 60 surface sediment samples (> 150 µm) from nearshore (8 m) to inner shelf (60 m) water depths yielded 125 species. The distribution of these species is described and 120 species are illustrated with color light microscope digital images and scanning electron microscope imagery. Five sample assemblages, CGT1-CGT5 are interpreted from the results of the cluster analysis of total (live plus dead) foraminiferal relative abundance data. Discriminant analysis demonstrates that these five groups are statistically distinguishable at the 95% confidence level. The distribution of groups is related to variations in depth and substrate grain-size. This relationship is reaffirmed by canonical correspondence analysis. Closest to shore (8–14 m water depth), the high diversity (49 species) assemblage (CGT1), characterized by Amphistegina radiata and Amphistegina lessonii , occurs in medium to coarse quartz sand substrates, likely derived from the nearby Terengganu River. In slightly deeper water (21–22 m) and in gravelly quartz sand substrates, the lower diversity (33 species) assemblage of CGT2 is strongly dominated by Amphistegina radiata and Amphistegina lessonii . CGT3 occurs in shelly muddy quartz sand substrates (32–41 m), has a high diversity assemblage (46 species), and is characterized by Assilina ammonoides , Amphistegina radiata and Discorbinella bertheloti . Berthierine internal molds of Amphistegina lessonii and Amphistegina radiata are common in CGT1, CGT2 and CGT3, possibly indicating reworking from Pleistocene deposits in the region. High diversity (51 species) assemblage CGT4 occurs in mud substrates (44–59 m) and is characterized by Heterolepa dutemplei and Asterorotalia milletti ; the nearshore, sandy substrate taxa Amphistegina radiata and Amphistegina lessonii are absent. CGT5, located farthest from shore at 60 m water depth and in shelly sandy mud and shelly muddy sand, has a high diversity assemblage (46 species) characterized by Heterolepa dutemplei and Assilina ammonoides , with rare Asterorotalia milletti . This assemblage may be, in part, a lag deposit associated with modern bottom currents. The results of this study were combined with previously published research to identify nine foraminifera-based environmental subdivisions in the southern South China Sea: mangrove swamps in Terengganu and Sabah, Malaysia; high salinity lagoonal and inlet assemblages in Terengganu, Malaysia; low salinity estuarine assemblages in Terengganu, Malaysia; Mekong Delta assemblages; nearshore areas in the northern Gulf of Thailand off the mouths of rivers; inner shelf environments off the Mekong delta and off Johore, Malaysia dominated by Asterorotalia pulchella ; shallow inner shelf (<40 m water depth) environments from Terengganu and Johore, Malaysia; inner shelf environments (40–100 m water depth) off Terengganu, Malaysia and on the east-central Sunda Shelf; outer shelf environments (100–200 m water depth) on the east-central Sunda Shelf. The subdivisions are related mainly to salinity in marginal marine environments and substrate type and depth/distance from shore in shelf environments.

ABSTRACT We review past and recent advances in Oligocene chronostratigraphy (and its internal subdivisions) and geochronology, the so-called “missing” Oligocene debate of the 1960s, and planktonic foraminiferal biostratigraphies of (sub)tropical and austral biogeographies. The Oligocene spans the interval from Chron C13r.0.14 to Subchron C6Cn.2n (0) , corresponding to astronomical cycles 84 01-C13n to 58 01-C6Cn . It is currently subdivided into two (Rupelian and Chattian) ages/stages. The planktonic foraminiferal biostratigraphy is characterized by a 7-fold (sub) tropical and 4-fold austral zonation, respectively.

ABSTRACT The work of Bé (1968) and Bé and others (1969) on the shell porosity of modern planktonic foraminifera provides additional criteria for categorizing the taxonomy of Oligocene genera and even species according to their test pore size and concentration. Use of these criteria in addition to the type of wall texture provides further information for the separation of groups of normal perforate Oligocene planktonic foraminifera for phylogeny and classification. In addition to wall textures recognized in the Eocene (Hemleben and Olsson, 2006) two types of wall texture are recognized in Oligocene spinose planktonic foraminifera: a Neogloboquadrina -type which occurs in the new genus Ciperoella and a conglobatus -type which occurs in two species of Dentoglobigerina.

ABSTRACT The taxonomy, biostratigraphy, and phylogeny of Oligocene Catapsydrax, Globorotaloides, and Protentelloides is reviewed. Catapsydrax and Globorotaloides are long-ranging genera with robust and dissolution-resistant tests. Both genera appeared in the early Eocene. Catapsydrax disappeared in the late Miocene while Globorotaloides has living representatives. Catapsydrax is ubiquitous in its distribution and highly variable in test size. Oligocene species of Globorotaloides are typically small (<250 μm) and usually rare in the tropics but may be common in high latitude and upwelling regions. After little evolutionary change in the Eocene and early Oligocene, Globorotaloides and Catapsydrax diversified at low latitudes in the mid- to late Oligocene resulting in the appearance of several new species and the quasi-clavate genus Protentelloides in the late Oligocene. So far Protentelloides spp. have only been found in the equatorial Atlantic Ocean. The following species are recognized as valid: Catapsydrax dissimilis (Cushman and Bermúdez), Catapsydrax indianus Spezzaferri and Pearson, Catapsydrax unicavus Bolli, Loeblich, and Tappan, Globorotaloides atlanticus Spezzaferri and Coxall n. sp., Globorotaloides eovariabilis Huber and Pearson, Globorotaloides hexagonus (Natland), Globorotaloides quadrocameratus Olsson, Pearson and Huber, Globorotaloides stainforthi (Bolli, Loeblich, and Tappan), Globorotaloides suteri Bolli, Globorotaloides testarugosus (Jenkins), Globorotaloides variabilis Bolli, Protentelloides dalhousiei Zhang and Scott, and Protentelloides primitivus Zhang and Scott.

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 ).

ABSTRACT The taxonomy, phylogeny and biostratigraphy of Oligocene Globigerina, Globigerinella and the new genus Quiltyella is reviewed. Globigerina and Globigerinella are long-ranging genera that extend into the modern. Globigerina appeared in the middle Eocene and diversified in the early Oligocene to give rise to several geographically wide-ranging and cosmopolitan species. Globigerinella originated and diversified in the early Oligocene and includes both common cosmopolitan species together with rare clavate and digitate species that were previously referred to the genus Protentella Lipps. Based on new wall textural studies we describe a third related genus, Quiltyella Coxall and Spezzaferri n. gen., which is always rare and highly geographically restricted. This is distinguished from Globigerina and Globigerinella by the higher pore concentration and extreme digitate chamber morphology. The following species are considered as valid: Globigerina archaeobulloides Hemleben and Olsson n. sp., Globigerina bulloides d’Orbigny, Globigerina officinalis Subbotina, Globigerinella clavaticamerata (Jenkins), Globigerinella megaperta Rögl, Globigerinella molinae (Popescu and Brotea), Globigerinella navazuelensis (Molina), Globigerinella obesa (Bolli), Globigerinella praesiphonifera (Blow), Globigerinella roeglina Spezzaferri and Coxall n. sp., and Globigerinella wagneri (Rögl), Quiltyella clavacella (Rögl), and Quiltyella nazcaensis (Quilty).

ABSTRACT Ciperoella Olsson and Hemleben n. gen. is erected for Oligocene spinose species that have a neogloboquadrinid-type wall texture and 4½-5 similarly sized chambers in the final whorl. Four species are recognized as distinct, namely Ciperoella anguliofficinalis (Blow), Ciperoella angulisuturalis (Bolli), Ciperoella ciperoensis (Bolli), and Ciperoella fariasi (Bermúdez). Their taxonomy, phylogeny, and biostratigraphy is discussed.

ABSTRACT The taxonomy, phylogeny and biostratigraphy of Oligocene and lower Miocene Globoturborotalita is reviewed. Globoturborotalita is a long-ranging genus appearing in the basal Eocene and still present in modern oceans with one living representative G. rubescens. Species attributed to this genus are generally common and cosmopolitan. The following species are recognized as valid: Globoturborotalita barbula Pearson and Wade, Globoturborotalita bassriverensis Olsson and Hemleben, Globoturborotalita brazieri (Jenkins), Globoturborotalita cancellata (Pessagno), Globoturborotalita connecta (Jenkins), Globoturborotalita eolabiacrassata Spezzaferri and Coxall n. sp., Globoturborotalita euapertura (Jenkins), Globoturborotalita gnaucki (Blow and Banner), Globoturborotalita labiacrassata (Jenkins), Globoturborotalita martini (Blow and Banner), Globoturborotalita occlusa (Blow and Banner), Globoturborotalita ouachitaensis (Howe and Wallace), Globoturborotalita paracancellata Olsson and Hemleben n. sp., Globoturborotalita pseudopraebulloides Olsson and Hemleben n. sp., and Globoturborotalita woodi (Jenkins).

ABSTRACT The taxonomy, phylogeny and biostratigraphy of late Oligocene and early Miocene Globigerinoides and Trilobatus is reviewed. Trilobatus and Globigerinoides are two long-ranging genera appearing in the late Oligocene and early Miocene, respectively. They diversified within the range interval of Paragloborotalia kugleri and are still present in modern oceans as some of the most abundant mixed-layer dwelling groups. The distinctive characteristic of the genera is the presence of one to several supplementary apertures on the spiral side. Globigerinoides species possess a ruber/sacculifer -type wall, Trilobatus possesses a sacculifer-type wall texture. The ruber -type wall texture probably appeared in the late Miocene with the appearance of G. ruber s.s. The following species of Globigerinoides are recognized as valid: G. altiaperturus Bolli, G. bollii Blow, G. italicus Mosna and Vercesi, G. joli Spezzaferri n. sp., G. neoparawoodi Spezzaferri n. sp., G. obliquas Bolli, and G. subquadratus Brönnimann. The following species of Trilobatus are recognized as valid: T. altospiralis Spezzaferri n. sp., T. immaturus (LeRoy), T. praeimmaturus (Brönnimann and Resig), T. primordius (Blow and Banner), T. quadrilobatus (d’Orbigny), T. subsacculifer (Cita, Premoli Silva, and Rossi) and T. trilobus (Reuss).

ABSTRACT The taxonomy, biostratigraphy, and phylogeny of Oligocene Subbotina is discussed and reviewed. We include forms that have teeth extending into the umbilicus. A total of nine species are accepted as distinct, namely Subbotina angiporoides (Hornibrook), Subbotina corpulenta (Subbotina), Subbotina eocaena (Gümbel), Subbotina gortanii (Borsetti), Subbotina linaperta (Finlay), Subbotina minima (Jenkins), Subbotina projecta Olsson, Pearson, and Wade n. sp., Subbotina tecta Pearson and Wade, and Subbotina utilisindex (Jenkins and Orr).

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).

ABSTRACT The taxonomy, phylogeny, and biostratigraphy of Oligocene Turborotalita is reviewed. We recognize two species in the Oligocene, Turborotalita praequinqueloba Hemleben and Olsson and Turborotalita quinqueloba (Natland). The two species are distinguished primarily by the number of chambers in the final whorl (typically 4-4½ versus 4½-5½ respectively). We extend the stratigraphic range of T. quinqueloba down through the Oligocene and into the upper Eocene, making it the longest-lived of all the extant morphospecies. Combined with recently published research on the earliest Paleocene, it appears likely that Turborotalita represents a distinct clade that persisted for the entire Cenozoic, having first appeared in the immediate aftermath of the Cretaceous / Paleogene mass extinction.

ABSTRACT The taxonomy, phylogeny and biostratigraphic ranges of three Oligocene species of Acarinina are discussed together with their synonymies. Acarinina diversified in the Paleocene and Eocene and only a few species remain in the OligoceneThe following taxa are recognized as valid species: Acarinina collactea (Finlay), Acarinina echinata (Bolli), and Acarinina medizzai (Toumarkine and Bolli).

ABSTRACT The taxonomy, phylogeny and biostratigraphy of the Oligocene Globanomalinidae (comprising the genera Pseudohastigerina and Turborotalia ) is reviewed. Members of the Family have a macroperforate, nonspinose, smooth to weakly cancellate wall. Extinctions in the late Eocene left the Family restricted to just a few surviving forms which themselves became extinct in the early Oligocene. The group is very useful for biostratigraphy, with the extinctions of Pseudohastigerina naguewichiensis and Turborotalia ampliapertura providing the lowest two biozone boundaries of the Oligocene. The following species are recognized as valid: Pseudohastigerina micra (Cole), Pseudohastigerina naguewichiensis (Myatliuk), Turborotalia ampliapertura (Bolli), and Turborotalia increbescens (Bandy).

ABSTRACT New microstructural observations on the tests of microperforate and medioperforate planktonic foraminifera from the Oligocene are presented and comparisons are made with some Holocene specimens. Two types and two subtypes of wall texture are distinguished: the glutinata -type (in Globigerinita and Tenuitella ; with the danvillensis -subtype in Dipsidripella ), and the ototara -type (in most Chiloguembelina ), with the chipolensis -subtype (in Cassigerinella and some Chiloguembelina ). Given also the gross morphological differences between the two major groups (trochospiral versus biserial or enrolled-biserial), these wall textures likely indicate separate evolutionary radiations from different groups of benthic foraminifera and so help define the higher taxonomy of the planktonic foraminifera. Accordingly, the following superfamilies are recognized in the chapters of this work: Globigerinitoidea and Guembelitriodea. Their placement relative to other superfamilies of foraminifera is not yet known.