bluuebunny/crossref_metadata_2025 huggingface dataset:
Semicytherura Wagner: its inner lamella and its close allies
Authors: Whatley Robin , Cusminsky Gabriela
Published: July 2010

Abstract. The genus Semicytherura Wagner differs from all other members of the Cytherurinae in the nature and course of its inner margin/line of concrescence. The inner lamella is very wide anteriorly, while posteriorly the inner margin extends anteriorly almost to the position of the closing muscles. However, two species examined by the authors, Semicytherura clavata (Brady, 1880) and Semicytherura contraria Zhao & Whatley, 1989, from the SW Atlantic and SE Asia respectively are shown to exhibit this characteristic feature only in the male. In the female of both these species, while the anterior inner lamella is identical to that of the male, posteriorly their inner margins parallel the posterior margin. Similar sex-linkage was show in the genus Angulicytherura which is probably closer to Cytherura than Semicytherura, with a narrow and vestibulate inner lamella.
New organic-walled dinoflagellate cysts from the Cenomanian to Maastrichtian of the Trunch borehole, UK
Authors: Pearce Martin A.
Published: July 2010

Abstract. A high-resolution palynological study of Cenomanian to Maastrichtian chalks from the Trunch borehole (southeastern UK) has revealed twelve new species and one new subspecies of organic-walled dinoflagellate cysts: Alterbidinium ioannidesii sp. nov., Cassiculosphaeridia alta sp. nov., Chatangiella eminens sp. nov., Cordosphaeridium catherineae sp. nov., Eatonicysta exilis sp. nov., Eatonicysta? mutabilireta sp. nov., Hystrichostrogylon robustum sp. nov., Membranilarnacia wilsonii sp. nov., Nelsoniella incomposita sp. nov., Odontochitina diducta sp. nov., Spiniferites jarvisii sp. nov., Spiniferites multispinulus sp. nov. and Spiniferites ramosus aquilus subsp. nov. Two new genera, Dimidium gen. nov. and Whitecliffia gen. nov. are described to necessitate the new combinations (with a former name in parentheses) of Dimidium striatum gen. et comb. nov. (Pterodinium? striatum) and Whitecliffia spinosa gen. et comb. nov. (Thalassiphora? spinosa).
Micropalaeontology reveals the source of building materials for a defensive earthwork (English Civil War?) at Wallingford Castle, Oxfordshire
Authors: Wilkinson Ian P. , Tasker Alison , Gouldwell Anthony , Williams Mark , Edgeworth Matt , Zalasiewicz Jan , Christie Neil
Published: July 2010

Abstract. Microfossils recovered from sediment used to construct a putative English Civil War defensive bastion at Wallingford Castle, south Oxfordshire, provide a biostratigraphical age of Cretaceous (earliest Cenomanian) basal M. mantelli Biozone. The rock used in the buttress – which may have housed a gun emplacement – can thus be tracked to the Glauconitic Marl Member, base of the West Melbury Marly Chalk Formation. A supply of this rock is available on the castle site or to the east of the River Thames near Crowmarsh Gifford. Microfossils provide a unique means to provenance construction materials used at the Wallingford site. While serendipity may have been the chief cause for use of the Glauconitic Marl, when compacted, it forms a strong, almost ‘road base’-like foundation that was clearly of use for constructing defensive works. Indeed, use of the Glauconitic Marl was widespread in the area for agricultural purposes and its properties may have been well-known locally.
A note on the Early Cretaceous biostratigraphy (foraminifera) of borehole 49/24-1 (Shell/Esso) in the southern North Sea
Authors: Crittenden S.
Published: July 2010

Abstract. Borehole 49/24-1 (Shell/Esso), which is the reference borehole for the Lower Cretaceous Cromer Knoll Group in the southern North Sea, is subdivided lithostratigraphically and biostratigraphically. The resulting stratigraphy is briefly compared to onshore U.K. outcrop and borehole sections of comparable age and lithofacies. The regional stratigraphical implications for the correlation of offshore and onshore sections of Lower Cretaceous (Albian) strata are briefly discussed.
Tournaisian miospore assemblages from Maesbury in the eastern Mendips, England
Authors: Higgs K. , Clayton G.
Published: July 2010

Abstract. Miospore assemblages are described from a section of the Lower Limestone Shale and the lower part of the Black Rock Limestone at Maesbury in the eastern Mendips. Conodont evidence indicates the miospore assemblages are Middle to Upper Tournaisian (Tn2–Tn3) in age. The assemblages are compared to those obtained from other areas, particularly southern Ireland. One new species Discernisporites sullivanii is erected and one new spore type is described.
The occurrence and distribution of megaspores in the Drybrook Sandstone and associated measures of the Forest of Dean basin, Gloucestershire, England
Authors: Spinner Edwin
Published: July 2010

Abstract. Megaspore assemblages are recorded from the Drybrook Sandstone and associated measures of the Forest of Dean basin, Gloucestershire, England, which support the miospore evidence described earlier by Sullivan (1964).
Charles Downie and the early days of palynological research at the University of Sheffield
Authors: Sarjeant William A. S.
Published: July 2010

Abstract. Palynological research at the University of Sheffield commenced through the initiative of Leslie R. Moore, whose principal concern was with Carboniferous spores. The discovery by Charles Downie of fossil dinoflagellates in English Jurassic strata, and his later work on Lower Palaeozoic acritarchs, resulted in an expansion of palynological research at Sheffield to all levels of the geological column, from Proterozoic to Tertiary. Recollections of the early days of palynology at Sheffield are presented in anecdotal fashion. Brief accounts of early members of the Sheffield research school are given and Downie’s achievements in palynology are reviewed.
Middle Devonian acritarch biostratigraphy of North America
Authors: Wicander Reed
Published: July 2010

Abstract. The known stratigraphic ranges of 66 acritarch species from eight independently dated Middle Devonian sections in North America are plotted. Twenty seven species are restricted to the Middle Devonian in North America, yet only 12 species occur in more than one section. None of these 12 species is, as yet, known to occur outside North America. This apparent endemism is believed to be due partly to the lack of study of contemporaneous assemblages from elsewhere in the world.
Observations on Upper Devonian acritarch communities from the southern Bergisches Land (Rhenish Massive)
Authors: Jux Ulrich
Published: July 2010

Abstract. In the southern Bergisches Land the Upper Devonian sequence (Frasnian and Lower Famennian) consists mainly of shales, marls and bituminous limestones together with an intercalated biostrome. The acritarch communities identified from these rocks are essentially characterised by members of the Micrhystridium-Veryhachium group.Sections through the vesicle of Micrhystridium vulgare Stockm̂anns & Willière reveal a simple, dense wall structure, but in the living cyst an exchange of gases was achieved through fine axial canals in its slender spines.Abundance and diversity of the acritarchs increased off-reef and reflect both the palaeogeography and the depth.The stable environments on the open marine shelf favoured phytoplanktonic life and also the formation of source rocks for hydrocarbons.
Preliminary account of Late Devonian palynomorph assemblages from the Bedford Shale and Berea Sandstone Formations of central Ohio, U.S.A.
Authors: Molyneux Stewart G. , Manger Walter L. , Owens Bernard
Published: July 2010

Abstract. Diverse assemblages of well preserved miospores and microplankton have been obtained from a series of samples collected across the boundary between the Bedford Shale and Berea Sandstone Formations in central Ohio. The miospores indicate a Late Devonian (pre-Carboniferous Tournaisian)* age for each of the samples. The microplankton support this age determination. A number of microplankton species not previously recorded from North America are present.
Re-study of some dinoflagellate cysts from the Oligocene and Miocene of Germany
Authors: Sarjeant William A. S.
Published: July 2010

Abstract. The type material of six dinoflagellate cyst species from the Late Oligocene to Middle Miocene of northwest Germany, described originally by Gerlach (1961), is reillustrated and redescribed. It is shown to include representatives of nine species. Areosphaeridium (ex: Baltisphaeridium) pectiniforme is found to be a senior synonym of Areosphaeridium multicornutum Eaton. Systematophora placacantha is considered to be a senior synonym of Cleistosphaeridium (ex: Baltisphaeridium) panniforme (Gerlach). The new combination Rhynchodiniopsis tenuitabulata (Gerlarch) is proposed. Revised diagnoses for these three species and for Leptodinium membranigerum (Gerlach), Achomosphaera triangulata (Gerlach) and Lejeunecysta hyalina (Gerlach) are proposed. The morphology of a form described here for the first time, and tentatively attributed to Phthanoperidinium, is considered perhaps to imply a separate origin for the Phthanoperidiniaceae: for that reason familial, rather than tribal, rank is preferred for that group. The stratigraphical ranges of the nine species here recognised and of two others of Gerlach’s species redescribed in earlier papers are detailed; elimination of misattributed forms means that these ranges are shorter than the published literature suggests.
Early-Late Cretaceous (Aptian-Cenomanian) Palynomorphs
Authors: Batten D. J. , Uwins P. J. R.
Published: July 2010

Abstract. Samples from 12 wells situated mainly in the northern part of the Cyrenaica Shelf of northeast Libya have yielded palynomorph assemblages of Aptian, Albian or Cenomanian aspect. The Aptian assemblages are dominated by land-plant remains and contain relatively few dinoflagellate cysts. By contrast, the latter are generally common in those from the Albian and Cenomanian samples. Deposition in near-shore marine environments is indicated for most of the Aptian succession whereas more open marine conditions are generally suggested for the younger strata. In places, however, a substantial terrestrial input was maintained during the accumulation of the Albian sediments.Dinoflagellate cysts typically recorded from Aptian palynological preparations include Aptea anaphrissa, Cyclonephelium sp. 1, Hystrichosphaerina schindewolfii, Muderongia simplex microperforata and Occisucysta spp. Several species of Cribroperidinium, but especially C. edwardsii and C. orthoceras, usually form an important part of the Albian assemblages; Kiokansium hydra is also often present. Skolochorate cysts referable to Coronifera and Florentinia are abundant in both these and the Cenomanian preparations, with Palaeohystrichophora infusorioides and several species of Canningia, Cyclonephelium, Oligosphaeridium, Spiniferites and Subtilisphaera being among the most numerous of the associated forms. In general the assemblages compare closely with those of similar age described by Below (1981, 1982) and Williams (1978) from onshore and offshore Morocco respectively.Although miospores are common in the Aptian preparations, they show relatively little morphological diversity. Smooth walled triradiate specimens, Classopollis and Inaperturopollenites are often the dominant forms. Angiosperm pollen grains are generally scarce and bisaccates only rarely encountered. A few of the Albian . . .
Silurian Palynomorphs
Authors: Hill P. J. , Paris F. , Richardson J. B.
Published: July 2010

Abstract. The data obtained from an independent study of acritarchs, chitinozoans and miospores enables the determination of maximum age ranges of samples taken from three wells. These are shown in Fig. 8.ACRITARCHSAt present, samples have been examined from six wells – A1-46, Core 2; E1-81, Cores 3, 4; F1-46, Core 3; D-31, Core 1; A1-81, Core 3 and C1-31, Core 8. The last mentioned is considered no further here as all samples have to date proved barren. The oldest of the acritarch assemblages are recorded from E1-81, Cores 3, 4 between 1850ft. and 2340ft. (Fig. 8) and from A1-81, Core 3 between 3750ft. and 3773 ft. These are dominated by the polygonomorph acritarchs, Veryhachium trispinosum and V. valiente but also include acanthomorphs such as Diexallophasis and Multiplicisphaeridium. The lack of diagnostic acritarchs of post convolutus zone would indicate the age of the samples as Rhuddanian to Early Aeronian but no higher than convolutus zone. Wells A1-46, Core 2 between 9710 to 9721 ft. (Fig. 8); D1-31, Core 1, 6105 to 6160ft. (Fig. 8) and F1-46, Core 3, 8852 to 8858 ft. all yield rich assemblages dominated by Multiplicisphaeridium, Diexallophasis and Veryhachium and characteristic species of Visbysphaera, Cymbosphaeridium, Oppilatala and ?Dateriocradus. The presence of forms such as Oppilatala eoplanktonica, ?Dateriocradus monterrosae, Multiplicisphaeridium arbusculiferum, Diexallophasis caperoradiola and Visbysphaera gotlandicum indicate the assemblages are of post-convolutus zone age, thus late Aeronian, as an oldest date.Regional palynological differences in the acritarch assemblages are observed between North Africa and Great Britain, which are consistent . . .
Devonian (Emsian-Famennian) Palynomorphs
Authors: Paris F. , Richardson J. B. , Riegel W. , Streel M. , Vanguestaine M.
Published: July 2010

Abstract. EMSIANMiospore assemblages which can be positively assigned to the Early Devonian have, to date, only been recorded from core material from Well A1-33. Assemblages of Emsian age were recorded from the interval 8079 to 8091 ft. whilst assemblages from 8055 to 8076 ft. contain some taxa which are common in the Emsian elsewhere but are not diagnostic. Assemblages recovered from sediments in the interval 9700 to 9709 ft. in Well A1-33 were dominated by leiospheres together with smaller numbers of acanthomorph acritarchs. The age of this interval is unknown but it could be as old as Ordovician.The Emsian assemblages recovered from the interval between 8079 to 8091 ft. contain a wide variety of azonate miospores together with species possessing an equatorial crassitude, specimens with zonate extensions are rare. Miospores with sculptural or structural modifications around their equators are relatively common i.e. ?Procoronaspora sp., Diatomozonotriletes sp. A. and Craspedispora craspeda. The presence in these assemblages of Emphanisporites annulatus, E. erraticus, E. rotatus, E. cf. decoratus, E. obscuras, Dibolisporites eifeliensis, D. cf. gibberosus, D. echinaceas, Apiculiretusispora brandtii together with small tripapillate miospores suggest an Early or Middle Emsian age to be probable. The assemblages are closely comparable with Emsian microfloras recorded in the Polignac Basin of Algeria (Jardiné & Yapaudjian, 1968) and the Rhadames Basin of Western Libya (Massa & Moreau-Benoit, 1976).EIFELIANMiospore assemblages of probable Eifelian age have been recovered from Well A1-37 from cored material at 10674 ft. The miospore populations which are extremely well preserved contain . . .
Late Quaternary freshwater dinoflagellate cysts from the British Isles
Authors: Hunt Chris O. , Andrews Martha V. , Gilbertson David D.
Published: July 2010

Abstract. Two species of peridinioid dinoflagellate cyst are described from Late Quaternary lacustrine and fluvial deposits in England and Scotland. Saeptodinium skipseaense sp. nov. has a bipesoid tabulation and a hemiepicystal archaeopyle. Colonsaydinium psilatum gen. et sp. nov. has a compound archaeopyle interpreted as 213P (1–2i 3–5″). The morphology of the archaeopyle suggests that this may be the cyst of a species with cinctoid tabulation. Both taxa are found only in sediment laid down in base-rich, non-turbulent, relatively deep fresh water.
Coccolith moulds in sedimentary organic matter and their use in palynofacies analysis
Authors: Batten D. J.
Published: July 2010

Abstract. Imprints of coccoliths can be expected on palynomorphs and phytoclasts in Rhaetian and younger palynofacies. They resemble the hollows left by spheroidal pyrite but may commonly be distinguished on the basis of shape and by occasional marks which reflect the arrangement of the calcite laths of which they were composed. Monospecific blooms are suggested when they are abundant and their size and form is more or less constant. Those which are larger than average and bear arcuate grooves subparallel to their margins may indicate the former presence of coccospheres. The occurrence of coccolith moulds in pre-Quaternary palynofacies both indicates marine influence on the environment of deposition and provides evidence for the affinity of amorphous organic matter in problematical preparations which are swamped with this material and contain few palynomorphs.
Recent Foraminifera from the North Sea (Forties and Ekofisk areas) and the continental shelf west of Scotland
Authors: Murray John W.
Published: July 2010

Abstract. The regions studied are all of mid continental shelf depth (70–145 m) and have bottom waters of normal marine salinity. The North Sea has lower bottom water temperatures than those to the west of Scotland. However, the major difference between the two regions is one of tidal and/or wave energy: the northern North Sea is a low energy environment of muddy sand deposition whereas the sampled part of the continental shelf west and north of Scotland is a moderate to high energy environment of medium to coarse biogenic carbonate sedimentation.The physical differences between the two main areas are reflected in the living and dead foraminiferal assemblages. The northern North Sea is a region of free-living species whereas the continental shelf west of Scotland has immobile and mobile attached species living on firm substrates. The northern North Sea is very fertile and has high standing crop values.The dead assemblages are small in size and very abundant. To the west of Scotland the sea is less fertile, standing crop values are low, the dead assemblages are moderate to large in size and reasonably abundant due to the slow rate of dilution by sediment.
Miocene Calcareous Nannofossils from the Mut Basin, southern Turkey
Authors: Varol Osman
Published: July 2010

Abstract. A detailed study of Miocene calcareous nannofossils using light and scanning electron microscope techniques has been undertaken on sections from the Cifciler, Mut and Silifke regions of the Mut Basin, southern Turkey. Age determinations are based upon a combination of previously published zonal schemes. Forty-one species are recorded; a new combination, Pontosphaera segmenta is also introduced.
Cytogenetic studies on marine ostracods: the karyotype of Gigantocypris muelleri Skogsberg, 1920 (Ostracoda, Myodocopida)
Authors: Moguilevsky Alicia
Published: July 2010

Abstract. The chromosome complement of a bathypelagic myodocopid ostracod, Gigantocypris muelleri Skogsberg, 1920, is described. The karyotype of this bisexual species consists of 2n = 18 (16A + XX) for the female and 2n = 17 (16A + XO) for the male. These chromosomes are all metacentric and of very similar size, ranging from 19μm to 24μm. This is the first description of the karyotype of a marine ostracod.
Aratrocypris, an enigmatic new cyprid ostracod from the Tertiary of D.S.D.P. sites in the S.W. Pacific
Authors: Whatley Robin , Ayress Michael , Downing Sian , Harlow Christopher , Kesler Karin
Published: July 2010

Abstract. The new cyprid genus, Aratrocypris, based on four species ranging in age from Upper Palaeocene to Recent, is described. One species is left in open nomenclature and three, A.rectoporrecta (the type species), A.vaccamaris and A.praealta are described as new. The genus bears a unique plough-like structure anteroventrally and the possible function of this and the palaeoecology of the animal are discussed in detail. It is suggested that the plough-like structure, in association with other carapace structures such as the posterior position of the adductor muscle scars and the hinge, together with the strong degree of anterodorsal overlap, are indicators of a feeding mode associated with forward movement through the sediment. However, it is also possible that the animal was a filter feeder living within the sediment at a steep angle to the sea floor with the anteroventral structure protruded beyond the sediment water interface.
Rediscovered types of Xestoleberis labiata Brady & Robertson, 1874 (Ostracoda)
Authors: Athersuch John , Horne David J.
Published: July 2010

Abstract. Recently rediscovered type specimens of Xestoleberis labiata Brady & Robertson are reported and illustrated, and a previous neotype designation shown to be invalid.
Age determinations of Neogene sediments from the English Channel and Western Approaches
Authors: Jenkins D. Graham , Martini Erlend
Published: July 2010

Abstract. Original published evidence indicated an age range of early Lower Miocene to early Middle Miocene for Globigerina silt samples from the English Channel and the Western Approaches. Suggested younger ages for these samples are refuted on the basis of planktonic foraminifera and calcareous nannoplankton.
A comparative study of collections from the S.W. Pacific (Saipan to Tonga), with the descriptions of Gambiella caudata (Brady, 1890) and a new species of Pterobairdia (Ostracoda)
Authors: Mckenzie K. G.
Published: July 2010

Abstract. Gambiella caudata (Brady, 1890) and Pterobairdia briggsae sp. nov. are described from collections made in the S. W. Pacific (Saipan, Onotoa, Ontong-Java/Kula Gulf, Noumea, Cook Islands, Fiji, Samoa, Tonga); and the lectotypes of several species described in a major early paper by Brady (1890) are illustrated. The carbonate compensation depth in this region lies at around 4500 m. Comparison of the Ontong-Java in Kula Gulf samples reinforces consideration of depth as a factor of ecological importance. A similarity matrix for the several faunas shows factors in common at species level ranging from 22% (Onotoa/Noumea) to nearly 60% (Samoa/Onotoa); while endemism ranges from 8.5% (Samoa) to nearly 33% (Tonga). Most endemic species belong in a limited number of podocopid families, in particular Bairdiidae, Trachyleberididae, Paradoxostomatidae and Leptocytheridae. These results appear consistent with an hypothesis that continued tectonics-driven changes in the regional marine topography and sedimentation, i.e. niche development, could have triggered speciation along the regional plate margins.
Apertural characteristics of certain unilocular foraminifera: methods of study, nomenclature and taxonomic significance
Authors: Knight Robert
Published: July 2010

Abstract. A method is described for cracking open the tests of foraminifera in order to examine in detail the structure of the apertural apparatus; it is used in the examination of certain unilocular forms included in the Nodosariida and the Buliminida. Four distinct types of aperture are described in species which have at some time been included in the genus Oolina. Four new terms, ‘endosolen’, ‘exosolen’, ‘endoanulus’ and ‘endodisc’ are formally proposed to describe structures related to the apertural apparatus in these and other species. The need is indicated for a further revision of the taxonomy of the unilocular Nodosariida and Buliminida which should follow a re-examination of certain holotypes.
A new species of Bolboforma (Incertae Sedis) from the Miocene of the Vøring Plateau, northern Norway
Authors: Powell Andrea
Published: July 2010

Abstract. A new species, Bolboforma fragori sp. nov., is described and figured from D.S.D.P. Leg 38 Site 341, and its stratigraphic position downhole is documented.
Clastic facies microfossils from the Chuanlinggou Formation (1800 Ma) near Jixian, North China
Authors: Zhongying Zhang
Published: July 2010

Abstract. Abundant organic-walled microfossils are well preserved in petrographic thin sections of shales from the c. 1800 Ma old Chuanlinggou Formation (Changchengian System) near Jixian, North China. The microfossils are compressed parallel to lamination and consist of sphaeromorph acritarchs and filamentous forms. The sphaeromorphs, ranging from 20–200μm in diameter, are more abundant in shales of the base of the Chuanlinggou Formation and assignable to Kildinosphaera, Leiosphaeridia, and Chuaria. They could represent either prokaryotic or eukaryotic organisms. The filaments, 0.5–24μm wide, are apparently unbranched, non-septate, and originally tubular structures. They occur in shales of the upper part of the formation, and include Archaeotrichion, Eomycetopsis, and Siphonophycus. The wider filaments probably represent the empty sheaths of the Oscillatoriaceae, whereas the narrower ones could represent either oscillatoriacean filaments to bacterial filaments. Although the Chuanlinggou microbiota seems to be a highly biased sampling of the Proterozoic life toward degradation-resistant taxa, it is among the oldest clastic microbiotas now known.
Ostracod faunas from the Halul, Laffan and Nahr Umr Formations of offshore Abu Dhabi, U.A.E.
Authors: Athersuch John
Published: July 2010

Abstract. The Halul and Laffan (Coniacian), and Nahr Umr (Albian) Formations of offshore Abu Dhabi are dated using palynomorphs, foraminifera and nannofossils and their ostracod faunas are illustrated and compared with similar assemblages in the Middle East.
Some aspects of the biology of the North American ostracod Sarsiella zostericola Cushman in the vicinity of a British power station
Authors: Bamber R. N.
Published: July 2010

Abstract. A population of the North American myodocopid ostracod Sarseilla zostericola Cushman has become established in the River Medway, Kent, in the vicinity of the cooling water discharge from Kingsnorth Power Station, though not living in the thermally stressed regions of the discharge environment. The species is assumed to have been introduced with North American oysters, but is not an example of an ‘exotic’ species surviving in association with the heated discharge. The Kingsnorth individuals are larger and more fecund than those of studied North American populations. The breeding biology, life history and sex ratio are discussed. It is suggested that the intolerance of S. zostericola to the conditions of the thermally stressed discharge canal is associated with shell physiology.
On the genotype of Cribrospirolina Haman, 1972 (Foraminiferida)
Authors: Al-Abdul Razzaq S. K. , Bhalla S. N.
Published: July 2010

Abstract. Cribrospirolina distinctiva Haman, 1972, the type species of Cribrospirolina Haman, is considered to be a junior synonym of Nautilus (Lituus) arietinus Batsch, 1971. The genotype should therefore be Cribrospirolina arietina (Batsch).
Calcareous nannoplankton biozonation of the Thanetian Stage (Palaeocene) in the type area
Authors: Siesser William G. , Ward David J. , Lord Alan R.
Published: July 2010

Abstract. The Thanetian Stage in the type area is composed of the Thanet Formation, the Woolwich Bottom Bed and the Oldhaven Beds. The Thanet Formation at the stratotype localities in southeastern England contains calcareous nannoplankton Zones NP 6/7 and NP 8. The Woolwich Bottom Bed and Oldhaven Beds are not zonable in the type area. The marine “Bottom Bed” of the Woolwich and Reading Beds is, however, assignable to Zone NP 9 outside the type area (at Clarendon Hill in Wiltshire).
The evolution of Early Cretaceous Dorothiinae (Foraminiferida)
Authors: Desai Damini , Banner F. T.
Published: July 2010

Abstract. Dorothia and Marssonella are ataxophragmiacean genera typically possessing canaliculate walls. They are believed to have evolved independently from noncanaliculate Praedorothia gen. nov. and Protomarssonella gen. nov. of Early Cretaceous time.
Palaeoecology of a hypersaline Carboniferous ostracod fauna
Authors: Dewey Chris P.
Published: July 2010

Abstract. A high abundance, low diversity ostracod fauna has been collected from the Lower Carboniferous Dimock and Phillips limestones in Nova Scotia, Canada. The ostracod fauna consists of Paraparchites sp. aff. P. kellettae Sohn and Beyrichiopsis lophota Copeland, as well as rare specimens of Acratia acuta (Jones & Kirkby), Bythocypris aequalis (Jones & Kirkby), and Chamishaella suborbiculata (Munster).Growth parameters for the dominant ostracod, Paraparchites sp. aff. P. kellettae, show that a multi-generation, progenetic, parthenogenetic population developed. This reproductive strategy caused rapid population growth and thereby allowed the species to take advantage of the available environmental resources.When considered together, the ostracod fauna and the sedimentology indicate that physiologically stressful hypersaline conditions prevailed. The combined data therefore provide evidence for hypersalinity tolerance and heterochronous development amongst Carboniferous ostracods.
The Cretaceous spore Stoverisporites and its taxonomy and stratigraphy
Authors: Felix Charles , Burbridge Patricia
Published: July 2010

Abstract. The Cretaceous palynomorph commonly designated Kuylisporites lunaris is correctly identified taxonomically as Stoverisporites lunaris, while Kuylisporties should apply to “Hemitelia type” spores. Stoverisporites lunaris is a useful stratigraphic indicator of Aptian – Albian sediments in the Canadian Arctic.
Ecophenotypic variation in Mutilus pumilus (Ostracoda) from Australia, studied by canonical variate analysis and tensor biometrics
Authors: Reyment R. A. , Bookstein F. L. , Mckenzie K. G. , Majoran S.
Published: July 2010

Abstract. Ecophenotypic variation in the ornament of living Mutilus pumilus from Australia may be related to seasonal temperature differences along the southern coasts. Standard methods of statistical analysis identify geographical differences in the morphology of the data, but are inadequate for analysing the complex patterns of shape variability in the species. Geometric morphometric methods localised the more important changes in shape in both the outline of the shell and in the configuration of the ornament.
The use of sodium polytungstate for conodont separations
Authors: Savage Norman M.
Published: July 2010

Abstract. Most conodont workers use heavy liquids that are carcinogenic or toxic in other ways. The use of the non-toxic water-based liquid sodium polytungstate has not been widely accepted because of reports that its high viscosity prevents the more delicate conodonts from settling, that it tends to crystallise during use, and that it is more expensive than traditional liquids. If used in the manner described below, viscosity, cystallisation and cost are no longer problems. The overwhelming advantage of safety then makes sodium polytungstate the heavy liquid of choice for conodont work.
X-raying planktonic foraminifera
Authors: Leary P. N. , Hart M. B.
Published: July 2010

Abstract. X-raying planktonic foraminifera provides a rapid, efficient and cost-effective method of recording many specimens for biometric analysis. A new approach is here proposed which replaces previous complicated techniques.
Speciation and structural evolution in the Palaeocene Morozovella lineage (planktonic Foraminiferida)
Authors: Corfield R. M. , Granlund A. H.
Published: July 2010

Abstract. The Palaeocene members of the planktonic foraminiferal genus Morozovella evolve through a series of intermediate morphologies from the globigerine ancestral species Subbotina pseudobulloides to the angulo-conical globorotaliid species Morozovella velascoensis. This example of structural evolution is investigated using eigenshape analysis on 41 samples from DSDP Site 577 (Shatsky Rise, North-West Pacific). The results indicate that the initial members of this lineage (S. pseudobulloides to M. angulata forma protocarina) exhibit a directional shape trend whereas, subsequent to the evolution of M. velascoensis, shape fluctuations are random. The interval of maximum shape change in this lineage is accompanied by an increase in the mean size of its members. Both the shape and size change occur during the peak in speciation of the Palaeocene morozovellids (at 63Ma), a phenomenon that we interpret as an example of species selection. This interval is also characterised by high levels of marine productivity, a factor considered instrumental in the control of the evolution of the Palaeocene Morozovella species.The potential of eigenshape analysis as a taxonomic aid is also investigated. Specimens mounted in side view are insignificantly different until the evolution of the late stage morozovellids M. angulata forma protocarina, M. velascoensis, M. occlusa and M. edgari in the Late Palaeocene. This suggests that the shape of the edge view of Palaeocene morozovellids is not a good measure of real species differences.
Ultrastructural analysis of selected Cretaceous megaspores from Argentina
Authors: Taylor Wilson A. , Taylor Thomas N.
Published: July 2010

Abstract. Detailed ultrastructural analysis of an assemblage of Lower Cretaceous megaspores from the Baqueró Formation of Argentina allows a complete description of two new taxa as well as additional information on the structure of several previously described types. Erlansonisporites sparassis displays a complex wall stratification, a separable surface reticulum, and attached microspores. Horstisporites iridodea sp. nov. possesses an elaborately patterned wall like that seen in several extant species of the modern lycopod genus Selaginella. On the basis of developmental information from modern heterosporous lycopod megaspores, the mesospore bearing Bacutriletes triangulatus sp. nov. is recognised as an aborted product of a meiotic tetrad. Also reported from this locality are Hughesisporites patagonicus, Bacutriletes sp. A, and an additional loosely defined megaspore type with characteristic clavae. Transmission electron microscopy provides the opportunity to infer previously unattainable biological information from dispersed spores. Such studies provide new insights as a foundation for the further elucidation of the developmental and evolutionary significance of wall construction in heterosporous pteridophytes.
A palynological investigation of some Lower Kimmeridgian deposits from Spain
Authors: Van Erve A. W. , Besems R. E. , Love C. F.
Published: July 2010

Abstract. The present paper provides the first palynological data from two ammonite controlled sections from the Lower Kimmeridgian (Sutneria platynota Ammonite Zone) in Spain. The Segura de la Sierra sequence is located in the Betic Cordilleras and the Hontanar sequence is located in the Iberian Chain. The palynological assemblages, dominated by dinoflagellate cysts and sporomorphs, include taxa which are well known from other areas to be long-ranging throughout the major part of the Mesozoic. Most noteworthy is the presence of Cicatricosisporites spp. in the material investigated. The impact of this on the assumption that a strong diachronous south-north migration of this taxon existed during Middle and Late Jurassic times is discussed.
Differences between the sensory organs of phytal and bottom-dwelling Loxoconcha (Ostracoda, Crustacea)
Authors: Kamiya Takahiro
Published: July 2010

Abstract. The morphology and distribution patterns of pores with a bristle were studied on two Loxoconcha species living in adjacent but different habitats: the phytal species L. japonica and the bottom-dwelling species L. uranouchiensis. Both species have only one kind of pore – sieve-pore – from which either of two kinds of bristles emerges. The two types of bristles are here called the “smooth”– and the “twisted”–type according to their morphological features. The sieve-pore orifice of the phytal Loxoconcha remains completely open, whereas that of the bottom-dwelling species has a special morphology both in the sieve-plate and the basal part of the bristle to cope with the adhesion of dirt. The number and distribution pattern of “twisted”-type bristles (chemo-receptors?) are the same in both species. The “smooth”-type bristles (mechano-receptors?), however, are distributed more densely in the ventral area of the bottom-dwelling species compared with those of the phytal species. This difference seems to be related to the mode of life, specifically the difference in the manner of ventral contact with substrata. Some adaptive characters of ostracod pores are clarified and their significance to ostracod taxonomy and palaeocology is discussed.
Loftusia arabica sp. nov. (Foraminiferida) from the Maastrichtian of central Saudi Arabia
Authors: El-Asa’ad Ghalib M. A.
Published: July 2010

Abstract. Microfauna from the lower part of the Hajajah Limestone Member (Early Maastrichtian) in central Saudi Arabia has been found to include a new species of Loftusia, L. arabica. The description, illustration, age and localized distribution of this species and a comparison with similar species are presented.
Fourier analysis of the planktonic foraminifer Neogloboquadrina pachyderma (Ehrenberg) from the Pleistocene Santa Barbara Formation, California
Authors: Yeh Chia-Chen , Patterson R. Timothy , Osborne Robert H.
Published: July 2010

Abstract. A Fourier analysis was performed on three hundred and fifty two specimens of Neogloboquadrina pachyderma. obtained from eleven sedimentary rock samples of the Pleistocene Santa Barbara Formation. Statistical analytical methods, including Chi square values, Q-mode cluster analysis, O-mode factor analysis and discriminant function classification, were also carried out on these specimens.Two natural groups are recognized which can be correlated with the assemblages previously defined as warm and cool Neogloboquadrina pachyderma phenotypes, as recognized by microscope. The amplitude values of the second, third, fourth, and seventh harmonics of the warm phenotype specimens are greater than those of the cool phenotype specimens. On the other hand, the amplitude values of the fifth harmonic of the warm phenotype specimens are less than those of the cool phenotype specimens. Only the second harmonic is statistically significant in describing the shape differences between the warm and cool phenotypes. Increased compaction of the cool phenotype tends to decrease elongation, resulting in low amplitude values for the second harmonic. An intergradational form between the warm and cool water phenotypes comprises 9.4 percent of the specimens.This intergradation, albeit narrow, identified by Fourier analysis and the discriminant function indicates that the controlling factors in the shape variation of the test are local, and are caused by variation in seasonal surface circulation patterns. The warm and cool water phenotypes of Neogloboquadrina pachyderma are therefore ecophenotypic varients within a single species.
The type species of the genus Orbitolina D’Orbigny, 1850 (Foraminifera)
Authors: Schroeder R. , Simmons M. D.
Published: July 2010

Abstract. A number of species have been suggested as type species of the genus Orbitolina d’Orbigny, 1850, notably Madreporites lenticularis Blumenbach, 1805, Orbulites concava Lamarck, 1816 and Orbitolina gigantea d’Orbigny, 1850. It is shown that the correct type species is Orbitolina gigantea, although this is in fact a species of coral. Consequently in order to preserve the concept of Orbitolina as a foraminiferal genus, we herein recommend to the ICZN the proposal of Orbulites concava as a replacement type species. This would negate the need for a major revision of orbitolinid taxonomy and allows the genus Palorbitolina Schroeder, 1963 to remain valid.
New Calcareous Nannofossil taxa from the Jurassic
Authors: Bown P. R. , Cooper M. K. E.
Published: July 2010

Abstract. Four biostratigraphically significant new calcareous nannofossil species are described, Biscutum davyi, Lotharingius contractus, Lotharingius velatus and Retecapsa incompta, together with three new combinations.
The Ostracod Genus Actinocythereis From The Middle Miocene of Northern Iraq
Authors: Khalaf Saleh K.
Published: July 2010

Abstract. Four species and one subspecies of the trachyleberid Ostracod genus Actinocythereis from the lower Fars Formation (Middle Miocene) of Northern Iraq are described for the first time. All of them are new and they show strong affinities with the species described from the Tertiary of Western India.
Notes on the Foraminiferal Genera Laterostomella De Klasz and Rérat and Streptochilus Brönnimann and Resig
Authors: De Klasz Ivan , Kroon Dick , Van Hinte Jan E.
Published: July 2010

Abstract. the biserial foraminiferal genera Laterostomella de Klasz & Rérat (1962) and Streptochilus Brönnimann & Resig (1971) have been described from the Miocene of Gabon and from Miocene to Recent levels of the Pacific and Indian Oceans, respectively. Both genera have since been found in the Upper Cenozoic of other regions: Laterostomella at Rockall Bank in the North Atlantic and in Papua-New-Guinea, and modern Streptochilus specimens were collected with plankton nets in the northern part of the Indian Ocean. The apertural characteristics of Laterostomella and Streptochilus show marked similarities as does the general shape of Laterostomella guembeliniformis with some Streptochilus species. However, other Laterostomella species have a very different form and isotopic data indicate that Laterostomella has a benthic and Streptochilus a planktic life habitat. We conclude that both genera are valid. For the first time SEM pictures of Laterostomella species are presented to show morphological variability, surface texture and aperture types.
On Everticyclammina Redmond (Foraminifera), especially E. kelleri (Henson)
Authors: Banner F. T. , Highton J.
Published: July 2010

Abstract. Everticyclammina kelleri (Henson) (= E. eccentrica Redmond and E. elegans Redmond), a Berriasian-Valanginian index in the Middle East, is descended from the Late Jurassic Tethyan E. praekelleri sp.nov, a species which probably had its ancestry in Late Jurassic Ammobaculites sp. From this ancestor also evolved E. virguliana, and, in the Middle East, its Early Cretaceous descendants E. hensoni Redmond, E. contorta Redmond and E. greigi (Henson), which themselves formed the ancestry of the Albian Hemicyclammina whitei (Henson) and the Tethyan Albian - Cenomanian index H. sigali (Maync). Another, independent lineage from Ammobaculites, Buccicrenata hedbergi (Maync) (= B. libyca Gohrbandt) to B. subgoodlandensis (Vanderpool), transglobal in the Barremian - Cenomanian, is distinguished.
On Lithocodium Elliott (Calcareous algae); its paleobiological and stratigraphical significance
Authors: Banner F. T. , Finch E. M. , Simmons M. D.
Published: July 2010

Abstract. Lithocodium aggregatum Elliott (with its synonyms, Bacinella irregularis Radoiĉić and Pseudolithocodium carpaticum Miŝík), Radoicicinellopsis sterni (Radoiĉić) and Bacinellacodium calcareus Dragastan are referred to the new subfamily Lithocodioidea of the family Codiaceae (marine, chlorophycean, calcareous algae). The significance which has been ascribed to these taxa by past authors is assessed. Radoicicinellopsis is proposed as a new genus. Lithocodium is redescribed and its diagnosis is emended. The importance of this alga in palaeoenvironmental interpretation and fossil hydrocarbon accumulation is noted.
New palynological data on the age of the Kiltorcan Flora of Co. Kilkenny, Ireland
Authors: Jarvis Edward
Published: July 2010

Abstract. The age of the fossil flora found in the Kiltorcan Formation of Co. Kilkenny has been disputed for many years, with no datable miospore assemblage ever being extracted from the plant beds due to the preservation. New exposure on Kiltorcan Hill, and experimentation with palynological techniques has allowed the extraction of two miospore assemblages. The palynological data studied shows that the strata on Kiltorcan Hill straddles the Devonian/Carboniferous Boundary; A Devonian LE Miospore Biozone assemblage has been examined from a plant bed with Cyclostigma kiltorkense whilst a Carboniferous VI Miospore Biozone date was determined for a plant bed with Lepidodendropsis sp., and? Rhacophyton. The topmost occurrence of Cyclostigma kiltorkense is unknown but it is certainly very near to the Devonian/ Carboniferous Boundary. The use of Cyclostigma kiltorkense as an index fossil for the uppermost Devonian is therefore not precluded.
Cenozoic Biostratigraphy and Global Change
Authors: Funnell Brian M.
Published: July 2010

Abstract. INTRODUCTIONIn May 1989 a British Micropalaeontological Society Symposium Meeting was held at the University of East Anglia under the title “Cenozoic Biostratigraphy and Global Change”. Fourteen lectures were given on this theme, many of them originating from investigations of DSDP/IPOD and ODP (Ocean Drilling Program) samples. All addressed the potential of micropalaeontological observations for interpreting the history of global and regional oceanographic and climatic change. Many results of this type of investigation are currently appearing in science journals such as “Paleoceanography” and “Palaeogeography, Palaeoclimatology, Palaeoecology” as well as in the “Proceedings of the Ocean Drilling Program”. British micropalaeontologists are taking an active part in this research, but relatively few of the resultant papers have so far appeared in the Journal of Micropalaeontology.Many of the lectures given at the May 1989 Symposium represented work already recently published, or due to be subsequently published in the Proceedings of the Ocean Drilling Program. Four papers, representing ongoing research not then due to be published, have been brought together here as a small thematic set, illustrating a variety of approaches to “Cenozoic Biostratigraphy and Global Change”. They range across Ostracoda, Coccolithophorida, Planktonic and Benthic Foraminifera, through the entire Cenozoic, including the latest Quaternary, and they include results from both the North Atlantic and Pacific oceans.TITLES“Global Change and the Biostratigraphy of North Atlantic Cenozoic deep water Ostracoda” - Robin C. Whatley and Graham P. Coles.“Palaeoclimatic control of Upper Pliocene Discoaster assemblages in the North Atlantic” - Alex. Chepstow-Lusty, Jan Backman. . .
Nonpalaeocope ostracod biostratigraphy of the type Wenlock Series, Silurian, of the Welsh Borderland
Authors: Lundin Robert F. , Petersen Lee E. , Siveter David J.
Published: July 2010

Abstract. Analysis of distribution, diversity and abundance of nonpalaeocope ostracods from the type Wenlock Series demonstrates that a major faunal change occurs around the Sheinwoodian-Homerian Stage boundary and that significant increases in faunal diversity occur at that boundary and in the late Whitwell Chronozone. Low abundance and low diversity in the late Sheinwoodian is interpreted to represent maximum water depth for the type Wenlock Series whereas the high diversity fauna of the late Homerian represents shallowest water conditions for this sequence. Many late Homerian species range into the Lower Elton Formation (early Ludlow) which suggests gradual ecostratigraphic change across the Wenlock-Ludlow boundary. Ancestor-descendant relationships for several lineages in the type Wenlock Series define lineage zones which essentially coincide with assemblage zones based on nonpalaeocope ostracods.
Lower Jurassic Ostracod Biozonation of the Mochras Borehole
Authors: Boomer Ian D.
Published: July 2010

Abstract. The extensive Lower Jurassic sequence at Mochras has yielded a diverse ostracod fauna which includes many new taxa. Poor preservation precludes a complete taxonomic review of this material although four new species (Cytherella praetoarcensis, Ogmoconcha convexa, Lophodentina striata and Oligocythereis? mochrasensis) are erected herein. Changes in the faunal composition and the rates of faunal turnover are briefly described. An ostracod biozonation is proposed for the section, comparison with established Lower Jurassic zonal schemes reveals that the present section is distinct from most other European sequences.