bluuebunny/crossref_metadata_2025 huggingface dataset:
Early and Middle Miocene dinoflagellate cyst stratigraphy of the Central Paratethys, Central Europe
Authors: Jiménez-Moreno Gonzalo , Head Martin J. , Harzhauser Mathias
Published: July 2010

Abstract. Marine organic-walled dinoflagellate cysts have been studied from the Early and Middle Miocene of the Central Paratethys in Austria (Vienna and eastern Alpine Foreland basins) and Hungary (Pannonian Basin), and compared with assemblages of similar age from the Atlantic Ocean and Mediterranean Sea. The presence of a diverse flora of 71 taxa, including such biostratigraphical markers as Apteodinium spiridoides, Cerebrocysta poulsenii, Cordosphaeridium cantharellus, Cribroperidinium tenuitabulatum, Exochosphaeridium insigne, Glaphyrocysta reticulosa s.l., Habibacysta tectata, Labyrinthodinium truncatum subsp. truncatum, Palaeocystodinium miocaenicum, and Unipontidinium aquaeductus, has allowed the establishment of five biozones that characterize the Ottnangian, Badenian and Sarmatian local stages (collectively equivalent to the mid-Burdigalian, upper Langhian and Serravallian stages). This is the first study to demonstrate the applicability of dinoflagellate cysts for detailed stratigraphic correlation and palaeoenvironmental interpretation in the Early and Middle Miocene of the Central Paratethys area.
Fusulinid Foraminifera of the Bashkirian–Moscovian boundary in the eastern Taurides, southern Turkey
Authors: Dzhenchuraeva Aleksandra V. , Okuyucu Cengiz
Published: July 2010

Abstract. Fusulinid faunas of the Pennsylvanian (Bashkirian–Moscovian) deposits of the Siyah Aladag Nappe were investigated from the Kuzuoluk section located in the eastern Taurides. The section is represented by grey, occasionally laminated, algal and fusulinid-rich limestones. The foraminiferal faunas of the Kuzuoluk section are very diverse and abundant which allows identification of the Bashkirian–Moscovian boundary by index-species such as Verella spicata and Aljutovella aljutovica. Other key taxa in the Bashkirian–Moscovian interval include Pseudostaffella grandis and Staffellaeformes staffellaeformis (Bashkirian Stage, upper part of the Lower Substage), Ozawainella pararhomboidalis and Staffellaeformes bona (Bashkirian Stage, Upper Substage), Verella spicata (Bashkirian Stage, Upper Substage) and Aljutovella aljutovica Zones (Moscovian Stage, Lower Substage). The Bashkirian–Moscovian microfaunas from the Kuzuoluk section can be correlated with assemblages from Tien-Shan, the Southern Urals and the Russian Platform.
Foraminiferal response to the deposition of insolation cycle 90 sapropel in different Mediterranean areas
Authors: Stefanelli Simona , Capotondi Lucilla
Published: July 2010

Abstract. Foraminifera were investigated across the sapropel unit corresponding to insolation cycle 90 deposited in three different oceanographic and depositional settings of the Mediterranean Sea (Alboran Sea, South Adriatic Sea and Ionian Sea). The constant presence of benthic foraminifera throughout the sapropels at <2000 m water depth and their absence within the sapropel at greater depth (>3000 m) indicate that the severity of oxygen depletion at the time of sapropel onset increases with increasing water depth.Planktonic and benthic foraminiferal patterns also document an interruption during sapropel deposition, which allows for the recognition of two sapropel phases. In all basins, the short interruption appears to be related to climatic deterioration, which led to the break in stratification and, hence, to the re-oxygenation of bottom waters. Since the interruption of the time-equivalent sapropel intervals has been documented previously in other Mediterranean areas, these data support the recent theory that this interruption must have been a trans-Mediterranean phenomenon and that the interruption records a short excursion out of the periods of wet climate associated with precessional minima.
Middle Palaeogene dinoflagellate cysts from Tierra del Fuego, Argentina: biostratigraphy and palaeoenvironments
Authors: Guerstein G. R. , Guler M. V. , Williams G. L. , Fensome R. A. , Chiesa J. O.
Published: July 2010

Abstract. Palynological data from four surface sections in northern Tierra del Fuego, southern Argentina, provide a biostratigraphical and palaeoenvironmental framework for the lower member of the La Despedida Formation and the Cabo Peña Formation in their type areas. Selected dinoflagellate cyst (dinocyst) events indicate that the age of the lower member of the La Despedida Formation is Middle Eocene and that of the Cabo Peña Formation is Late Eocene–earliest Oligocene. The age assigned to the La Despedida Formation agrees with determinations based on calcareous microfossils, but there is a potential discrepancy regarding the Cabo Peña Formation. According to recent stratigraphic studies, the Cabo Domingo Group, which includes the Cabo Peña Formation, is Late Eocene–Miocene in age. The palynomorph assemblages from the lower member of the La Despedida Formation contain the endemic ‘Transantarctic Flora’, which reflects marginal marine conditions. The maximum abundance of Enneadocysta spp. reflects more open-sea conditions and a warming event during the late Middle Eocene. The lower part of the Cabo Peña Formation has a high ratio of dinocysts to sporomorphs and an abundance of Nematosphaeropsis lemniscata, Reticulatosphaera actinocoronata and Impagidinium spp., suggesting an oceanic to outer neritic environment. Abundant Gelatia inflata and protoperidiniacean cysts indicate cool surface waters rich in dissolved nutrients. These cold-water markers may reflect the development of the Antarctic Circumpolar Current, an important event in the transition from a greenhouse to an icehouse climate mode. Toward the top of the sections, the lower ratios of dinocysts to sporomorphs, as well as the composition of the dinocyst assemblages, reflect a neritic rather than an oceanic setting. This palynological change may be due to eustatic sea-level lowering caused by cooling during the latest Eocene–earliest Oligocene. A new species, Spiniferites scalenus, is described and the new combination Lingulodinium echinatum proposed; an emendation for the latter species is also proposed.
Dinoflagellate cysts from the Upper Triassic (Norian) of northeastern Iran
Authors: Ghasemi-Nejad Ebrahim , Head Martin J. , Zamani Maryam
Published: July 2010

Abstract. Upper Triassic (Norian) strata of the Miankuhi Formation in northeastern Iran have been studied palynologically, revealing a diverse but poorly preserved association of dinoflagellate cysts. Based on representatives of the genera Hebecysta, Heibergella, Rhaetogonyaulax and Sverdrupiella, the strata are assigned to the middle of the Hebecysta balmei Zone with an inferred age of early Late Norian. The association shows similarities with assemblages from Australia, New Zealand, Indonesia, Northwest Europe, arctic Canada and Alaska, indicating an interconnection of warm Tethyan waters during the Late Triassic. The occurrence of Sverdrupiella species in the clastic, near-shore marine deposits of Miankuhi, and their presence in similar sedimentary facies world-wide, indicate that this genus was well adapted to clastic shallow-marine environments.
Late Ordovician (Hirnantian) scolecodont clusters from the Soom Shale Lagerstätte, South Africa
Authors: Whittle Rowan , Gabbott Sarah , Aldridge Richard , Theron Johannes
Published: July 2010

Abstract. More than 20 partial scolecodont clusters were recovered from the Soom Shale Lagerstätte, South Africa. The specimens were found in association with chitinozoans, algae, conodont apparatuses and the enigmatic needle-like fossil Siphonacis. The Family Xanioprionidae is identified and the species Xanioprion? n. sp. is distinguished. The Family Mochtyellidae is also identified and the new genus Synaptogenys and new species S. rietvleiensis are described. The specimens represent the first described scolecodonts from South Africa and the first apparatus-based taxonomic study of specimens from Gondwana.
Stratigraphy, palaeoenyironmental interpretation and uplift history of Barbados based on foraminiferal and other palaeontological evidence
Authors: Jones R. W.
Published: July 2010

Abstract. The ages and environments of deposition of the principal mapped units of Barbados, based on foraminiferal and other palaeontological evidence, are discussed, together with the uplift history of the island. The age of the Scotland Formation is demonstrated to be Paleocene to ?early Middle Eocene; that of the Oceanic Formation late Middle Eocene to early Early Miocene; that of the Bissex Hill Formation and Conset Marl late Early to early Late Miocene; and that of the Coral Rock Formation Middle–Late Pleistocene. The environment of deposition of the Scotland Formation is interpreted to be abyssal; that of the Oceanic Formation abyssal to be lower bathyal; that of the Bissex Hill Formation and Conset Marl middle to lower bathyal; and that of the Coral Rock Formation inner neritic. Observed elevation/age relationships imply a mean uplift rate of between 120 m Ma−1 and 220 m Ma−1.
Recent benthic foraminifera in the Flensburg Fjord (Western Baltic Sea)
Authors: Polovodova Irina , Nikulina Anna , Schönfeld Joachim , Dullo Wolf-Christian
Published: July 2010

Abstract. Living benthic foraminifera of Flensburg Fjord were surveyed in June 2006. The muddy and organic-rich sediments of the inner fjord were dominated by Elphidium incertum. E. incertum and E. excavatum were frequent in muds and sandy muds of the fjord loop around Holnis Peninsula and in the outer part. Gelting Bay yielded a different biofacies, indicating a brackish and sandy habitat, poor in food supply and with microfauna dominated by Ammonia beccarii and E. albiumbilicatum. The central fjord and nearshore zones of the loop were characterized by sandy muds, relatively poor in food and occupied by A. beccarii, E. incertum and E. excavatum subspecies. High abundances of E. excavatum were encountered in the innermost fjord, with fine-grained and organic-rich muddy sediments.A comparison with previous studies revealed the profound changes in species composition in the outer Flensburg Fjord since the 1970s. A decline in numbers of Ammotium cassis and flourishing of Ammonia beccarii in Gelting Bay were recognized. These changes are most likely associated with decreased intensity and frequency of salt-water inflows into the Baltic Sea since the 1960s. It is inferred that the decline of A. cassis is similar to that of Eggerelloides scaber, which currently is found only in depressions of Kiel Bight with higher salinity.
Calcareous nannofossil biostratigraphy of an outcrop section of Aptian sediments of west-central Portugal (Lusitanian Basin)
Authors: Da Gama Rui O. B. P. , Bown Paul R. , Cabral M. Cristina
Published: July 2010

Abstract. The present work is the first study of nannofossils from the Ponta Alta and Praia da Lagoa members of the Cresmina Formation and provides a new approach to establishing the age of these sediments. Nannofossil biostratigraphy improves previous age assignments: the Ponta Alta Member is placed within the latest Early Aptian, the passage between the Ponta Alta to the Praia da Lagoa members is assigned an early Late Aptian age and the Praia da Lagoa member is assigned an age not younger than the early Late Aptian. The lower half of the Rodísio Formation is assigned an age not younger than the Albian.The integration of the nannofossil results with isotope stratigraphy provides support for the age attributions and calibration with more open-marine sections. The low abundance of nannoconids observed within the Ponta Alta Member coincides with the OAE 1a carbon isotope excursion and is possibly a manifestation of the ‘nannoconid crisis’ event. The subsequent increase in the abundance of nannoconids in the upper Ponta Alta Member coincides with the highest values of the δ13C isotope anomaly and may reflect a position above the ‘nannoconid crisis’ event in the early Late Aptian.
Wind transport of foraminiferal tests into subaerial dunes: an example from western Ireland
Authors: Murray John W.
Published: July 2010

Abstract. INTRODUCTIONThe empty tests of dead foraminifera behave as sedimentary particles and are subject to transport, although their different shapes and effectively low density means that their hydraulic equivalence is greater than that of spherical quartz grains (see Haake, 1962). Their estimated traction velocities range from c. 4 cm s−1 to c. 13 cm s−1 (Snyder et al., 1999). The presence of calcareous foraminiferal tests in a fossil sedimentary deposit would normally be taken as an indication of deposition in a marine environment. However, it has long been known that wind can transport tests from a carbonate beach into adjacent carbonate dunes as in Dogs Bay, Connemara, Eire (Murray, 1973) and Abu Dhabi, Persian Gulf (Murray, 1970). The purpose of this Notebook is to provide some details of the Dogs Bay occurrence and to comment on how such deposits might be recognized in the rock record.In western Ireland the coastal geology consists of hard rocks, yet the beaches are commonly composed primarily of calcareous bioclastic sands (Guilcher & King, 1961; Keary, 1967). Dogs Bay (Lat. 53° 24′ N Long. 9° 58′ W) lies on the west-facing side of a tombola which is approximately 200 m wide and 400 m long. The tombola is made up of sand dunes that are mainly vegetated except along the margins adjacent to the beaches. Dogs Bay is exposed to Atlantic storms and the surface layer of the beach is reworked on each tidal cycle. Both the beach and the dunes are composed of . . .
On the award of TMS Honorary Membership, 15 November 2006 Dr John Whittaker – an appreciation
Authors: Jones Robert W. , Lord Alan R.
Published: July 2010

Abstract. John Eustace Whittaker was born near Burnley, Lancashire on 25 September 1945 and educated at St Mary’s College, Black-burn. Despite being a devoted Lancastrian, fate has decreed that since leaving school he has spent the rest of his life elsewhere and he is now a resident of south Essex. His interest in earth science was stimulated by the Geography and Geology teacher at St Mary’s College, Ken James, and consequently he entered the then University College of Wales, Aberystwyth to read Joint Geography and Geology in 1964. John was, however, ‘rescued’ from the geographical side of things by the redoubtable Robin Whatley (TMS Honorary Member 2004) and, in 1967, commenced research under his supervision, at the same time striking up what was to become a lifelong friendship with him, and also with John Haynes. John’s doctoral work concerned living ostracods of coastal sites in southern England and his thesis, ‘The taxonomy, ecology and distribution of Recent brackish marine Ostracoda from localities along the coast of Hampshire and Dorset (Christchurch harbour, The Fleet and Weymouth Bay)’, was a monumental two volumes submitted in 1972. From this developed Marine and Brackish Water Ostracods (Athersuch et al., 1989), an important synoptic work still in regular use (if you can find a copy). Fate again took a hand when, in 1971, a position in the Natural History Museum, London became available, working with another formidable character, the late Geoffrey Adams – on foraminifera rather than ostracods! John worked at the NHM until his retirement in . . .
The Oligocene nannolith Sphenolithus evolutionary lineage: morphometrical insights from the palaeo-equatorial Pacific Ocean
Authors: Blaj Teodora , Henderiks Jorijntje , Young Jeremy R. , Rehnberg Emil
Published: July 2010

Abstract. Changes in morphology within the biostratigraphically important Oligocene nannofossil lineage, Sphenolithus predistentus, S. distentus and S. ciperoensis were investigated in carbonate sediments from the palaeo-equatorial Pacific Ocean Site 1218 in order to determine the nature of this evolutionary lineage. Using differences in their morphology and stratigraphical ranges, the aim of this study was to determine whether these taxa represent an anagenetic evolutionary lineage or a set of discrete species with overlapping stratigraphical ranges. A total of 1215 specimens from 12 samples were analysed morphometrically and the basal ratio, i.e. the ratio between the basal width and proximal cycle height, was identified as a key parameter for the study of this lineage. We conclude that S. distentus and S. predistentus are intergradational species forming an anagenetic lineage but that S. ciperoensis is a discrete species which evolved relatively abruptly in the Late Oligocene.
Description of appendages from three marine trachyleberidid species (Ostracoda, Crustacea) from Japan
Authors: Tanaka Gengo , Seto Koji
Published: July 2010

Abstract. Three living trachyleberidid ostracod species, Acanthocythereis munechikai Ishizaki, Actinocythereis kisarazuensis Yajima and Hirsutocythere hanaii Ishizaki, were discovered in the Tsushima Straits, c. 120 km east of Tsushima Island (north Island), N 34° 46′ E 130° 46′ at a depth of 116 m. This is the first description of complete appendages for these genera.
On the ostracod genus Micrommatocythere Wilkinson, 1983
Authors: Wilkinson Ian P.
Published: July 2010

Abstract. In volume 2 of this journal it was suggested that Monoceratina saxonica Schmidt, 1954 may belong in the newly erected genus Micrommatocythere Wilkinson, 1983. M. saxonica, however, was previously assigned the type species of Saxellacythere Gründell & Kozur, 1971. The two genera are distinguished on muscle scar distribution.
Middle – Late Jurassic (Late Bathonian – Tithonian) Palynomorphs
Authors: Thusu B. , Vigran J. O.
Published: July 2010

Abstract. INTRODUCTIONJurassic palynomorph assemblages have been recovered in numerous wells in northeast Libya. Jurassic rocks reflect changing sedimentary environments which have greatly influenced the composition of the palynological assemblages.In the northernmost area, Jurassic sediments unconformably overlie the Palaeozoic or Triassic and show a mixed marine and continental influence. In the northeastern part of the area thicker and deeper water marine sediments are known, while shallow marine sediments overlie the platform facies immediately to the south. Pollen and miospores are fairly well preserved and are dominant in most samples. Dinoflagellate cysts are richly represented especially in the deposits of the north and northeast. Most samples contain abundant variably sorted cuticular debris and structured wood fragments. This significant influx of terrestrial debris together with the associated palynomorph assemblages indicate deposition in a shallow marine environment in close proximity to the shoreline for most of the Jurassic deposits in the northern area.In the central and southern region, sandstone, silt stone and red shale deposited in non-marine fluvial to lacustrine or lagoonal environment, unconformably overlie the metamorphic or igneous Precambrian Basement. These sediments show a general lack of well preserved palynomorphs. Miospores, though present are generally long ranging and terrestially derived detrital kerogen dominate the assemblages.MICROFLORAL SUCCESSIONMiospore assemblages present in most of the samples investigated are dominated by small gymnosperm pollen. Classopollis spp., Exesipollenites spp., Sphaeripollenites spp., and nonaperturate pollen assigned to Araucariacites spp. Saccate pollen assigned to Concentrisporites spp., Perinopollenites spp., Callialasporites spp., and Inaperturopollenites spp., are often common . . .
Early Cretaceous (Neocomian-Cenomanian) Palynomorphs
Authors: Thusu B. , Van Der Eem J. G. L. A.
Published: July 2010

Abstract. INTRODUCTIONThis study is primarily concerned with the Neocomian to Aptian palynomorphs recorded in selected exploration wells (See Fig. 9). In order to document a complete Early Cretaceous microfloral succession in the studied wells, a reconnaissance of Aptian to Early Cenomanian palynomorphs was also undertaken. Details of the results from this younger interval appear in a later section.Palynomorph assemblages vary in preservation and character. To the north, sandstone, siltstone and shale deposited in shallow-marine environments, contain well-preserved assemblages of dinoflagellate cysts, pollen and spores which can be used for stage-level age determination. A majority of the samples analysed, however, contain moderate numbers of dinoflagellate cysts, but fewer miospores. The abundance of land derived detritus indicates the relatively close proximity of the shoreline. In the central and southern parts of the study area, sandstone and siltstone that are deposited in non-marine, fluvial, lacustrine or lagoonal environments show a general paucity of well-preserved palynofloras. Miospores of stratigraphic value are generally rare or absent although the majority of the samples are dominated by land derived detritus.PALYNOMORPH SUCCESSIONThe majority of the wells from northern Cyrenaica show a hiatus at the Jurassic Cretaceous boundary. Late Neocomian or Aptian sediments occur immediately above Middle or early Late Jurassic sediments. Well preserved Neocomian palynomorphs were recorded in wells A1-36, B1-36, Bla-18 and A1-45. The stratigraphical ranges of palynomorphs presented on the plate explanations are local ranges and are based on the studied intervals only. A preliminary palynological zonation of Late Jurassic (Late Kimmeridgian) to . . .
Late Carboniferous – Early Permian (Ghzelian – Artinskian) Palynomorphs
Authors: Brugman W. A. , Eggink J. W. , Loboziak S. , Visscher H.
Published: July 2010

Abstract. The preliminary results of the palynological investigations in the Late Carboniferous – Early Permian of Northeast Libya indicate that at least two successive intervals can be readily recognised:Ghzelian – Asselian interval. This lower interval is characterised by assemblages showing a dominance of saccate pollen; miospores usually occur in very low frequencies. Throughout the interval one may recognise (a) monosaccate pollen, attributable to genera such as Potonieisporites, Plicatipollenites, Cannanoropollis and Barakarites; (b) taeniate (striate) bisaccate pollen, identified as species of Illinites, Protohaploxypinus, Strotersporites, Striatoabieites and Distriatites; and (c) non-taeniate bisaccate pollen, represented by alete genera and Limitisporites.Although some of the monosaccate elements may already occur in the Early Carboniferous of Libya, the observed diversification points to a Late Carboniferous – Early Permian age of the assemblages. Taeniate pollen grains are known to make their first appearance in the Moscovian (e.g., in the Donets Basin; compare Inosova et al., 1976) but the observed diverse assemblages appear more characteristic for the latest Carboniferous and/or Early Permain, of both the Euramerican and Gondwana provinces (compare, e.g., Inosova et al., 1976; Kemp et al., 1977). Consequently, the authors consider the interval to represent a Carboniferous – Permian transition sequence, broadly comprising the Ghzelian and Asselian Stages. It should be noted, however, that the status of the Asselian Stage is still under discussion; some authors prefer the inclusion of this unit (or part of it) in the Carboniferous. From a palynological point of view the incoming of Distriatites could well mark a datum level corresponding to the Carboniferous . . .
George Stewardson Brady (1832–1921) and his collections at the Hancock Museum, Newcastle-upon-Tyne
Authors: Davis Peter S. , Horne David J.
Published: July 2010

Abstract. A synopsis of the life and work of G. S. Brady is given. The curation and computer-cataloguing of the Brady slide collections is described and the subsequent benefits to researchers outlined. Much work remains to be carried out on the collection – an attempt to demonstrate the type of research needed focuses on the species of Ostracoda described by Brady in two of his early papers.
Comparison between Recent benthic foraminiferal faunas of the Porcupine Seabight and Western Approaches Continental Slope
Authors: Weston Janice F.
Published: July 2010

Abstract. Although only 1 degree of latitude apart, the South Western Approaches and Porcupine Seabight continental slopes support widely differing benthic foraminiferal faunas. The less energetic, less variable, muddier conditions of the prograding margin of the Porcupine Seabight yield foraminiferal faunas which show extremely good zonations with respect to depth and are dominated by species such as Trifarina angulosa, Gavelinopsis lobatulus and Uvigerina pygmaea. The more variable and more energetic conditions of the submarine canyons of the Western Approaches margin do not support well depth zones faunas, but assemblages which are generally dominated by more cosmopolitan and robust species, such as Cassidulina carinata, Brizalina dilatata and B.subaenariensis. Such differences may be related to factors such as a greater variability of sediment type and bottom water characteristics and a more energetic environment in the Western Approaches area.
Cluthia miocenica sp. nov. (Ostracoda) from the Middle Miocene of southern Poland (Central Paratethys)
Authors: Szczechura Janina
Published: July 2010

Abstract. Cluthia miocenica sp. nov., the earliest known species of Cluthia Neale, 1973, is described from the upper part of the Middle Miocene (Upper Badenian) of south-east Poland. The occurrence of this species supports the hypothesis of climate cooling during Upper Badenian times in the Central Paratethys and suggests that this region was the birth place of the genus.
Mesozoic micropalaeontology of exploration well Elf 55/30–1 from the Fasnet Basin, offshore southwest Ireland
Authors: Ainsworth Nigel R. , Horton Nicola F.
Published: July 2010

Abstract. The geology, biostratigraphy and palaeoecology of exploration well Elf 55/30–1 in the Fastnet Basin are summarised. The biostratigraphical and ecological distribution of the foraminifera and Ostracoda from the late Triassic, the Lower Jurassic and the Lower Cretaceous are reviewed with reference to microfaunas elsewhere in Europe. Selected microfossil taxa are illustrated.
Ultrastructure of ostracods as a stratigraphical tool for the subdivision of the Senonian sequence in Israel
Authors: Honigstein Avraham
Published: July 2010

Abstract. Ultrastructural size variations in pitted and ornamented Senonian ostracods from Israel are valuable to distinguish subzones in full successive sections. Pit and pore sizes of different genera are inversely correlated. Peaks of pit diameters from different locations are indicative of certain levels and therefore applicable to biostratigraphic correlations.
The electron microprobe analysis of agglutinating foraminifera; results from a Rotaliammina test from the S.W. Pacific
Authors: Bevan Jennifer C.
Published: July 2010

Abstract. Electron microprobe analyses and element distribution images of a Rotaliammina test from Funafuti, S. W. Pacific, are presented. Detailed analysis of both spiral and umbilical surfaces shows that the earliest chambers are richest in organic components, and that the brown coloration of the test correlates with amount of organic material (“tectin”) rather than with iron content. The peripheral flange is shown to be similar in composition to the agglutinant-rich spiral surface of the last chamber. The example serves to illustrate a useful analytical method which has application to the study of the structure and composition of the wall of agglutinating foraminifera in general.
New adherent foraminiferans from the Lower Cretaceous (Aptian) of south-central England
Authors: Wilson Mark A.
Published: July 2010

Abstract. Three new species and one new genus of adherent foraminiferans have been found within bivalve borings in cobbles from the Faringdon Sponge-gravel (Upper Aptian) of south-central England. The new genus and species, Lapillincola faringdonensis is a uniserial textulariine with an initial planispiral coil and a multiple aperture. Lapillincola gen. nov. is a remarkable homeomorph of Arenonina Barnard, which was originally described as an agglutinated form. Arenonina is shown here to actually be calcareous and perforate, and thus a junior synonym of Rectocibicides Cushman & Ponton. Acruliammina parvispira sp. nov. is another uniserial textulariine with an initial coil. Bullopora ramosa sp. nov. is an adherent polymorphinid with a branching, irregular series of adherent chambers. These foraminiferans may have used the bivalve borings as spatial refuges from the abrasive, high energy environment of the Sponge-gravel.
Observations on the wall structure and the excystment mechanism of acritarchs
Authors: Al-Ameri Thamer K.
Published: July 2010

Abstract. Systematic studies on acritarchs of Ordovician, Silurian and Devonian ages of North Africa, the British Isles and Podolia showed varieties of six types of wall structures and five types of excystment mechanism. These are well documented in this study and may form the main basis for a natural classification in future work.
Globofissurella and Cerebrina, two new foraminiferal genera in the Family Lagenidae
Authors: Patterson R. Timothy
Published: July 2010

Abstract. Globofissurella, a new genus of Oolininae, differs from other genera of the subfamily by its costate test and fissurine aperture. The type species Globofissurella scotti sp. nov., and an additional species, Globofissurella bulabrum sp. nov. are also described. Cerebrina gen. nov., type species Cerebrina perplexa sp. nov. differs from other genera of the subfamily Oolininae by its reticulate surface sculpture and fissurine aperture.
Stratigraphic ranges of selected miospores in coal seams of Upper Coal Measures age in Oxfordshire and S.E. Warwickshire
Authors: Smith A. H. V.
Published: July 2010

Abstract. The extensive programme of boring recently undertaken by the National Coal Board to establish the limits of the concealed coalfield in Oxfordshire and southeast Warwickshire, has provided a unique sequence of high volatile bituminous coals from the upper part of the Upper Coal Measures suitable for spore analysis. The coals are mainly bright and the possible implications for the spore flora are briefly considered. The spores from the coals are characteristic of Westphalian D assemblages but the problem of recognising the base of the Westphalian D is discussed. It is concluded that the seams under investigation are all of Westphalian D age. Two new species, Vestispora burfordiensis and V. witneyensis are described. The occurrence of these species as well as Schopfites dimorphus and Punctatosporites granifer in Oxfordshire and in other British coalfields is reviewed. The ranges of these species provide the basis for recognising three new miospore assemblage zones to replace the former Thymospora obscura Assemblage Zone XI of Smith & Butterworth (1967). The base of the epibole of Thymospora pseudothiessenii is also well defined and is a useful biostratigraphic marker. Comparison is made with the zonal sub-division of the Desmoinesian series of the Illinois basin by Peppers (1985).
Palynological evidence for a diachronous low-salinity event in the C–T boundary clay at Stevns Klint, Denmark
Authors: Hultberg Stefan U.
Published: July 2010

Abstract. The frequency distribution of dinoflagellate cysts, miospores, and freshwater algae has been studied in 70 samples from the Fish Clay at Stevns Klint, eastern Denmark. The palynological assemblages change both vertically and laterally. The vertical change is from a strictly marine assemblage in the Cretaceous chalk to a freshwater or brackish assemblage in the Fish Clay. The lateral change indicates that the Fish Clay was deposited diachronously, even within the limited geographical area covered by the Stevns Klint section.
Combined ostracod and planktonic foraminiferal biozonation of the Late Coniacian – Early Maastrichtian in Israel
Authors: Honigstein Avraham , Almogi–labin Ahuva , Rosenfeld Amnon
Published: July 2010

Abstract. The distribution and zonation of planktonic foraminifera and ostracods during the Late Coniacian – Early Maastrichtian succession in Israel was studied in detail from six surface sections. The combination of contemporaneous biozones led to a more accurate age determination of the local ostracod zones, according to the Tethyan planktonic foraminiferal zonation. The configuration of the biozones of both taxa presents more datum lines for stratigraphic correlation of the Senonian strata of Israel. Three new ostracod species were described from Campanian sediments: Cytherelloidea zinensis, Loxoconcha hebraica and Cristaeleberis ordinata.
The regular occurrence of Reophax scottii Chaster, a benthic foraminiferan, in plankton samples from the North Sea
Authors: John Anthony W. G.
Published: July 2010

Abstract. The benthic foraminiferan Reophax scottii Chaster, not previously recorded in suspension, is shown to occur regularly in plankton samples taken at 10m by the Continuous Plankton Recorder in the North Sea. The species’ seasonal and geographical distribution is described. It was found mainly in the winter and spring (November to April).
Durotrigia daveyi gen. et sp. nov., an Early Bajocian dinocyst with a variable precingular archaeopyle
Authors: Bailey David
Published: July 2010

Abstract. Durotrigia daveyi gen. et sp. nov. is described from the Inferior Oolite (Early Bajocian) of Dorset, England. It is the earliest distinctly tabulated gonyaulacacean dinocyst with a precingular archaeopyle. The archaeopyle is apparently variable, involving the loss of between 1 and 5 precingular plates. This variability poses some interesting taxonomic problems, particularly the implications to the value of the archaeopyle type as a high-level classification criterion. Some possible causes of archaeopyle variability are discussed.
The Late Eocene – Recent Bradleya johnsoni Benson lineage (Crustacea, Ostracoda) in the Central Equatorial Pacific
Authors: Steineck P. Lewis , Yozzo David
Published: July 2010

Abstract. Three stratigraphically successive species of Bradleya Hornibrook, 1952 from abyssal sediments of the central equatorial Pacific (Leg 85, Deep Sea Drilling Project) form an unbranching evolutionary sequence designated as the B. johnsoni Benson lineage. These taxa are B. sp. 1 (Lower Oligocene), B. johnsoni (Upper Oligocene – Middle Miocene) and B. thomasi n. sp. (Upper Miocene – Recent). A shared synapomorphic character, the posterior bridge complex, establishes the kinship of these species. Their stratigraphic ranges and a traceable series of changes in the organisation and mass of the reticulum are consistent with the hypothesis of direct ancestor/descendant relationships between them. Bradleya johnsoni is distinguished from B. sp. 1 by the appearance of new primary muri in the posteroventral region and by a general increase in reticular mass. In B. thomasi, the overall reticular pattern is maintained but it becomes more delicate and less rectilinear. Each species of this lineage shows similar variation in the posteroventral reticulum.
The value of the organic cement matrix in the identification of the shells of fossil testate amoebae
Authors: Ogden Colin G. , Ellison Robert L.
Published: July 2010

Abstract. Shells of fossil testate amoebae isolated from lake sediments in England and Canada have organic cement matrices similar to those possessed by Recent specimens. The surface patterns of individual building units can be useful taxonomic features for confirming the identification of the many species of Difflugiidae found in these environments.
Globigerinita iota Parker, 1962, and the validity of Tenuitellita Li, 1987 (Foraminiferida)
Authors: Haman Drew
Published: July 2010

Abstract. Tenuitellita Li, 1987 (type species Globigerinita iota Parker, 1962) is a validly established genus, despite the fact that the same type species has been selected for another previously proposed genus. The earlier proposed genus, Parkerina Fordham, 1986, is invalid as it does not conform to the Articles of the International Code of Zoological Nomenclature, and thus cannot compete on the Principle of Priority.
Rotosphaeropsis thula (Davey 1982) comb. nov., emend.: a dinoflagellate cyst from the Upper Jurassic-Lower Cretaceous of England
Authors: Riding James B. , Davey Roger J.
Published: July 2010

Abstract. The Upper Jurassic-Lower Cretaceous dinoflagellate cyst Cannosphaeropsis thula Davey 1982 does not conform to the morphological parameters of the genus Cannosphaeropsis O. Wetzel 1933 emend. Duxbury 1980. The species also exhibits no indications of belonging to the Spiniferites complex of Evitt (1985). The species is transferred to Rotosphaeropsis Davey 1987 by virtue of its shape, archaeopyle type, processes and trabeculae and the specific diagnosis is emended in the light of this reassessment.
Recent shallow marine Ostracoda of the Ikerssuak (Bredefjord) District, Southwest Greenland
Authors: Penney David N.
Published: July 2010

Abstract. From a study of 15 grab samples collected from the littoral and sublittoral of the Ikerssuak (Bredefjord) district, SW Greenland, one myodocopid and 18 podocopid ostracod species were recovered. These constitute an indigenous fauna and the majority have been recorded from Greenland before. Leptocythere castanea and Leptocythere lacertosa are new to Greenland, and have not previously been confirmed from the western Atlantic. Copulating pairs of Hemicythere borealis were found in an intertidal embayment near the town of Narssaq. This species reproduced just before the late summer-autumn maximum of primary production in the area, and at the warmest time of the year. Semicytherura nigrescens, which has been recorded previously in SW Greenland, may have a similar distribution pattern to certain Subarctic Mollusca in western Greenland.
Foraminifera and Ostracods from the Dinantian Woodbine Shale and Urswick Limestone, South Cumbria, U.K.
Authors: Athersuch J. , Strank A. R. E.
Published: July 2010

Abstract. Macrofaunal and foraminiferal analyses have shown the Woodbine Shale in South Cumbria to be of latest early Asbian age. Ostracods and solid foraminifera from the Woodbine Shale are described and illustrated for the first time. Several ostracods including Rectobairdia cf. dorssenata, Healdia ‘penchfordensis’, Bairdia cf. leguminoides, Pustulobairdia cf. confragosa and Microcheilinella subcorbulinoides, previously only known from late Asbian or younger strata, have now been shown to range into the early Asbian. The numerous bairdiids, heavily ornamented ostracods, trilobites, brachiopods and abundant foraminifera suggest a deep, subtidal, marine environment of deposition for the Woodbine Shale. Foraminifera from the underlying Lower Urswick Limestone suggest an early Asbian age for this formation whilst the overlying Upper Urswick Limestone is shown to be of late Asbian age. The foraminiferal assemblages from these beds can be correlated directly with those in the early Asbian Upper Potts Beck Limestone and the late Asbian Knipe Scar Limestone in the Asbian stratotype section at Little Asby Scar, Cumbria.
Morozovella protocarina: a new species of Palaeocene planktonic Foraminiferida
Authors: Corfield R. M.
Published: July 2010

Abstract. Detailed study of the Palaeocene Morozovella lineage of Deep Sea Drilling Project Sites 577 (Shatsky Rise, North Pacific) and 527 (Walvis Ridge, South Atlantic) have revealed a distinct morphological stage transitional between M. angulata (White) and M. velascoensis (Cushman & Ponten). This stage is characterised by the development of the first peripheral pseudo-keel of the Cenozoic Globigerinidae and is named Morozovella protocarina. The biostratigraphic application of this species clarifies problems of recognising the Late Palaeocene planktonic foraminiferal zones.
Quantitative analysis of the Arkhangelskiella cymbiformis Group and Biostratigraphic usefulness in the North Sea Area
Authors: Varol O.
Published: July 2010

Abstract. Based upon a combination of biometric and quantitative analysis on the Arkhangelskiella cymbiformis group, six additional datums were obtained in the Campanian to Maastrichtian interval of the North Sea area. These datums are in ascending order: 1. first common to abundance occurrence of A cymbiformis (Var. NT); 2. last common to abundance occurrence of A. cymbiformis (Var. NT); 3. first common to abundant occurrence of A. cymbiformis (var. N); 4. first common to abundant occurrence of A. cymbiformis (Var. W); 5. last common to abundant occurrence of A. cymbiformis (Var. N); and 7. last common to abundant occurrence of A. cymbiformis (Var. W). The width of the shield is taken as a main criterion for biometric analysis.
Maastrichtian Heterohelicidae (Planktonic Foraminifera) from the North West Atlantic
Authors: Nederbragt Alexandra J.
Published: July 2010

Abstract. Relative frequencies of heterohelicid species in the Maastrichtian of DSDP Site 605, DSDP Hole 111A and Imperial Oil/Amoco core hole C23 on the Grand Banks have been estimated to show temporal and geographic variation patterns in terms of Cretaceous faunal provinces. Heterohelix globulosa and H. planata dominate the shallow marine heterohelicid faunas of core hole C23. Together with H. dentata and H. glabrans they are the most common forms in the temperate faunas from Hole 111A. Pseudoguembelina spp are common in the Tethyan faunas from Site 605 but are rare in Hole 111A. Racemiguembelina spp and fully developed Pseudotextularia spp exclusively occur at Site 605. A distinct but unexplained faunal boundary within the Site 605 section involves frequency shifts of three “relatively cold” species. H. dentata, H. glabrans and H. planata. Dissolution effects, expressed in changes in the relative frequencies of H. globulosa and Pseudotextularia elegans, are present in several intervals across the section. H. globulosa is the most sensitive for dissolution. Pst. elegans is resistant, as are to a lesser extent, Gublerina cuvillieri, Pseudoguembelina excolata, Psg. palpebra, and Planoglobulina acervulinoides.
New chitinozoan taxa from the lower Wenlock (Silurian) of the Welsh Borderlands, England
Authors: Swire P. H.
Published: July 2010

Abstract. One new chitinozoan genus, Salopochitina, and three new chitinozoan species Salopochitina bella, Eisenackitina varireticulata and Eisenackitina spongiosa, all of early Wenlock age, are described from two British Geological Survey boreholes at Lower Hill Farm, Shropshire, and Eastnor Park, Hereford and Worcester. The new taxa have short stratigraphical ranges, are relatively abundant, and may be useful for correlation in successions from Wales and the Welsh Borderlands.
Modification of Conodont element micro-ornamentation by clay-mineral indentation
Authors: Burnett R. D. , Austin R. L.
Published: July 2010

Abstract. ‘Sclerites’, described from the surfaces of conodont elements in bedding-plane assemblages by Rhodes and Austin (1985), are shown to be indentations of bladed minerals on the conodont element apatite. Such minerals are seen coating moulds from which conodont elements have been removed, and are identified tentatively as Kaolinite. The recognition of inorganically-produced surface patterns on conodont elements, developed within low thermal régimes, is considered relevant in the light of recent studies of biogenic and metamorphic surface features.
Krausella minuta, a nomen nudum in ostracodology, and three new species of Cardobairdia Bold, 1960 from the Campanian of Belgium and the Cenomanian of southern England
Authors: Nuyts Hans
Published: July 2010

Abstract. Van Veen (1936b) found the ostracod species Krausella minuta Triebel, in deposits of the uppermost Maastrichtian from the Valley of the Jeker, South Limburg, The Netherlands. Investigation has shown that Triebel never published any data on this species, so the name Krausella minuta has to be rejected, being a nomen nudum.In the boreholes of Kallo (27 E 148) and Knokke (11 E 138), in the northwestern part of Belgium, a related, yet undescribed species occurs, for which the name Cardobairdia triebeli sp. nov. is proposed. This taxon was found in deposits of mainly Lower Campanian age. Another new species, Cardobairdia rectimarginata, is described from the Campanian in the Knokke Borehole.The specimens of Cardobairdia minuta from the Cenomanian from southern England belong to a new species, defined here as C. cenomanensis.
Size variation of Neogene Reticulofenestra coccoliths from Indian Ocean DSDP Cores
Authors: Young Jeremy
Published: July 2010

Abstract. Data is presented here on Reticulofenestra coccolith size distribution patterns from 122 Mid-Miocene to Pliocene samples from Deep Sea Drilling Project sites in the Western Indian Ocean and Red Sea. A clear pattern is revealed with a dramatic size reduction event occurring in the Late Miocene (nannofossil zone NN10). As a result of this event nannofloras from the interval above it are readily distinguishable by the absence of specimens longer than 5 microns; this interval is termed the “small Reticulofenestra interval”. Assemblages from above and below this interval contain large specimens but they can be reliably distinguished by different size distribution patterns within them. Analogous data from other studies is reviewed, possible causes of the pattern are discussed, and its biostratigraphic application described. The Neogene taxonomy of the genus Reticulofenestra is revised and four new combinations are proposed.
The status of Rotalia Lamarck (Foraminifera) and of the Rotaliidae Ehrenberg
Authors: Haynes John R. , Whittaker John E.
Published: July 2010

Abstract. One damaged specimen remains in the Lamarck Collection, Geneva, from the original type series of Rotalia trochidiformis (Lamarck) the remainder of which was included in the Defrance Collection in Caen, all of which was destroyed in World War II. Restudy of this sole remaining paralectotype, together with topotypes and other material held in the British Museum (Natural History) has revealed the morphological changes that occur with ontogeny in this species and has made an emended generic diagnosis necessary. In the adult, R. trochidiformis develops open septal canals with a tributary system of secondary and tertiary fissures by resorption and a dense mass of vertical pillars which effectively destroy the umbilical cover plate seen in the juvenile. The septal canals connect with the umbilical canal via supplementary apertures and with vertical canals between the umbilical pillars. They also connect with the foraminal passage via subsutural canals. The idea the Rotalia should be reassigned to the Discorbidae is rejected and the integrity of the Rotaliidae is affirmed.
New Bairdiidae (Ostracoda) from Tulear, Madagascar
Authors: Maddocks Rosalie F.
Published: July 2010

Abstract. The new species Neonesidea thomassini, Aponesidea ifatyensis, and Mydionobairdia tulearensis are described. Their anatomical characters permit emended diagnoses for these poorly known genera and some speculation on relationships of ornate Bairdiidae.
On the preparation of specimens for scanning electron microscopy and a simple technique for plate making, using a black background
Authors: Whittaker J. E. , Hodgkinson R. L.
Published: July 2010

Abstract. Methods for cleaning, the mounting of micropalaeontological specimens (foraminifera, ostracods and conodonts) on SEM stubs and for successful plate making on a black background are described.