bluuebunny/crossref_metadata_2025 huggingface dataset:
The Benthonic foraminiferal response to changing substrate in Cenomanian (Cretaceous) rhythms induced by orbitally-forced surface water productivity
Authors: Leary Paul N. , Hart Malcolm B.
Published: July 2010

Abstract. The rhythmic sedimentation of Cenomanian age in Southern England is most likely the result of orbital forcing (precession). The oxygen isotope signature and the foraminiferal assemblage from detailed (5cms), continuous samples through three of these rhythms show systematic variation with lithology. The marls yield cooler surface water palaeotemepratures with high benthonic diversities, low planktonic:benthonic ratios and the planktonic assemblage contains around 5–10% rotaliporids. The chalks yield warmer surface water palaeotemperatures with low benthonic diversities, high planktonic:benthonic ratios and the planktonic assemblage contains 1–4% rotaliporids. This indicates that the chalks represent enhanced surface water productivity induced by increased surface water palaeotemperature. Three groups (Tritaxia pyramidata Reuss, Gavelinella spp. and Lenticulina spp.) together form over 90% of the benthonic assemblage. Each >250μm assemblage exhibits a systematic variation in size with lithology. The mean sizes are smallest and the maximum sizes of the moving populations decrease in the middle of the chalks. This may be a consequence of three different factors, (a) during intervals of increased productivity (chalks) the benthonic foraminifera may be achieving gametogenesis at an enhanced rate due to the increased availability of food supplies, or (b) the increased productivity may cause dwarfism within the micro-benthos, or (c) the effects of current winnowing prior to burial. The relative merits of each of these possibilities are discussed.
A Palynological Zonation for the Paleocene of the North Sea Basin
Authors: Schröder Theo
Published: July 2010

Abstract. The proprietary palynological zonation developed by Shell U.K. Exploration and Production for the Paleocene of the North Sea Basin is formally released and described. Four main zones - in ascending order PT11, PT13, PT15 and PT19 - can be consistently recognised basin-wide from microplankton assemblages. The zonation for the central North Sea provides a further fourfold, mainly pollen-based, subdivision - PT19.1, PT19.2, PT19.3 and PT19.4 - of the prospective Forties Formation. Changes in climate may be considered a major influence over quantitative shifts in the Late Paleocene pollen spectrum and so it is reasonable to assume that such shifts may represent ‘time-lines’; hence the subzones may be valid over a much wider area than the central North Sea.
The taxonomic status of the minute foraminifera Discorbina minutissima Chaster (1892), D. chasteri Heron-Allen & Earland (1913) and related species
Authors: Pawlowski Jan , Zaninetti Louisette , Whittaker John , Lee John J.
Published: July 2010

Abstract. This study presents a revision, using type material, of the tiny foraminifera Discorbina minutissima Chaster, D. chasteri Heron-Allen & Earland (erected as a nomen novum for D. minutissima Chaster, non Seguenza) and D. chasteri var. bispinosa Heron-Allen & Earland. All are referred to the genus Rotaliella Grell. Heron-Allen & Earland’s new name chasteri is shown to be only applicable as a replacement name for Chaster’s species; their own material from Clare Island is a new species, named here R. heronalleni sp.nov. In addition, two other species — Rotaliella ? simplex (Sidebottom) and R. antarctica sp.nov. — have been recognised amongst the specimens labelled as D. chasteri in the Heron-Allen & Earland Collection in the Natural History Museum (BMNH). Lectotypes are designated for Rotaliella chasteri and R. bispinosa.
The relative taxonomic value of morphological characters in the genus Nummulites (Foraminiferida)
Authors: Racey Andrew
Published: July 2010

Abstract. The main evolutionary trends in the nummulites are briefly summarised and the value of certain morphological characters in species discrimination are summarised. The degree of interdependence of each morphological character on all other characters is assessed and the characters are weighted in order of importance. Environmental and ontogenetic effects on each character are then reviewed and the characters reweighted in order of importance.
The habitat of the foraminifer Paratrochammina (Lepidoparatrochammina) haynesi
Authors: Murray John W. , Alve Elisabeth
Published: July 2010

Abstract. INTRODUCTIONTrochammina haynesi Atkinson, 1969, the type species of Paratrochammina (Lepidoparatrochammina) haynesi (Atkinson), was described from the holdfasts of Laminaria from the shallow sublittoral zone (18.3m) of Cardigan Bay, Wales. After collection, the algae were placed in a bucket in a solution of one part formalin to ten parts seawater and agitated to free the foraminifera. Some 16 specimens of P. (L.) haynesi were recovered out of a total assemblage for two samples of 2787 individuals. Because of the method of preparation, nothing could be said of the mode of life other than that all the foraminifera were associated with algae. Brönnimann and Whittaker (1986) also recorded this species from off Plymouth.In their remarks on the subgenus Paratrochammina (Lepidoparatrochammina), Brönniman and Whittaker (1986) suggested that the form of the test is ‘better adapted to fixation than the higher spired Paratrochammina s.s.’.NEW OBSERVATIONSIn the course of a broader study of the Hamble estuary, a tributary of Southampton Water, we collected sediment samples from the intertidal and subtidal areas. These were preserved in alcohol, stained with rose Bengal, and washed on a 63μm sieve. The foraminifera were concentrated by flotation using trichloroethylene.One coarse grained sandy gravel from the margin of the channel contained an abundance of rose Bengal stained (living) P. (L.) haynesi in the flotation. These formed 53% of the living and 6% of the dead assemblage >63μm. However, examination of the coarse material in the sediment fraction revealed that this species lives in sheltered microhabitats. For . . .
Reappraisal of three calcareous nannofossil species: Coccolithus crassus, Toweius magnicrassus, and Toweius callosus
Authors: Wei Wuchang , Liu Li , Bukry David
Published: July 2010

Abstract. Type material of calcareous nannofossil index species Coccolithus crassus and two geographically widespread species Toweius magnicrassus and T. callosus have been studied by both light and SEM microscopy and morphometric measurements were made. Coccolithus crassus resembles Coccolithus pelagicus but has a raised cycle of elements around the centre of the distal shield. It probably evolved from C. pelagicus. Both T. magnicrassus and T. callosus have three cycles of elements in distal view, which is a characteristic of Toweius. Toweius magnicrassus is larger than T. callosus. Differentiation of T. magnicrassus from T. callosus is possible and useful because there is generally a size gap between them in a given sample and they have different stratigraphic ranges. However, both T. callosus and T. magnicrassus appear to increase in size from high to low latitudes. Toweius callosus most probably evolved from Toweius pertusus in the latest Palaeocene and gave rise to T. magnicrassus in the early Eocene.
New species of dinoflagellate cysts from Maastrichtian-Danian chalks of the Danish North Sea
Authors: Schiøler Poul
Published: July 2010

Abstract. A palynological study of Danian - Maastrichtian chalks from the Dan oilfield (Danish North Sea) has revealed the presence of nine new species and subspecies of dinoflagellate cysts: Achomosphaera antleriformis sp. nov., Cassiculosphaeridia? tocheri sp. nov., Chlamydophorella? multifibrata sp. nov., Isabelidinium majae sp. nov., Hystrichosphaeropsis perforata sp. nov., Hystrichostrogylon borisii sp. nov., Leberidocysta? flagellichnia sp. nov., Spiniferites foveolatus sp. nov. and Spiniferites pseudofurcatus granulosus ssp. nov. Seven of the taxa are considered important biostratigraphic markers in the area.
Middle Eocene Ostracoda from Baja California Sur, Mexico
Authors: Carreño Ana Luisa , Cronin Thomas M.
Published: July 2010

Abstract. One genus and six new species of ostracodes are described from the Bateque Formation on the Pacific Coast of Baja California Sur, Mexico. Planktonic foraminifers indicate a mid Eocene age and the whole assemblage is characteristic of a shallow warm-water environment. Paijenborchella mezquitalensis sp. nov. is the second record of the genus Paijenborchella from the Eocene of North America. Except for this species and the new genus Bajacythere, the ostracode association has strong affinities with those described from the lower Tertiary Gulf Coast region.
A secondary stage design for the preparation of microfossils for the SEM
Authors: Tatman Stephen
Published: July 2010

Abstract. The preparation of microfossil specimens for study with the scanning electron microscope involves the transfer of material from slides to stubs. Specimens must then be oriented and mounted securely. To do this accurately the slide and stub should both be viewed through a stereomicroscope. However due to differences in shape and height, both surfaces are not usually in the plane of focus at the same time. Many micropalaeontologists routinely use small boxes or sample tube lids to hold the stub and refocus before finally mounting the specimens. The risk of dropping specimens is reduced by using a single carrier, securely holding both the slide and stub. The design illustrated below (fig.1) was developed from a prototype constructed from cardboard and plastic. The metal unit can easily be made in a workshop at a very low cost or cardboard versions made in the laboratory.The stage is based on the principle that both slide and stub should be held securely, close together and in the same plane of focus. The slide holders should be secure but not too tight otherwise the stub may be jarred as slides are changed. The number of slides which can be held on one unit may be varied. The presence of two holders has proved useful, any more could make the unit cumbersome. If the microscope to be used does not have a wide stage then it may prove more practical to have only one holder.The stub holders allow the stub to be clamped to . . .
An early representative of the genus Frambocythere Colin, 1980: Frambocythere pustulosa (Grékoff, 1957) from the Albian of Zaire
Authors: Colin Jean Paul
Published: July 2010

Abstract. In 1957, Grékoff described Metacypris pustulosa trom the Loia Formation originally assigned to the “Wealden” but subsequently dated of Albian age (Maheshwari et al. 1977) of Central Zaire. This species is characterized by its small size (about 0.6 mm long), the surface of the carapace covered by numerous small hemisphaerical pustulae and the presence of two two subvertical sulci.In the original description, Grékoff compared this species with Metacyrpis consobrina Jones, 1893 from the Bear River Formation also of Albian age of Wyoming (U.S.A.). Later, in 1961 and 1962, Pinto & Sanguinetti considered Metacypris pustulosa as a junior synonym of Metacypris consobrina . The type-material of Metacypris consobrina was restudied and illustrated by Colin & Danielopol (1981: Pl. 14, figs. 1–4). This species shows striking similarities with Metacypris pustulosa: small size, similar shape and same micro-pustulose ornamentation. It nevertheless differs from the African species by the presence of a single and weak subvertical sulcus. Recent examination of material from the Albian of Central Zaire (Colin, in press) allowed to clearly demonstrate the presence of the two sulci which were mentioned by Grékoff in the original diagnosis but are not visible on the illustrations. The general morphology, size, omamentation and the presence of the two sulci lead us to transfer this species to the genus Frambocythere Colin, 1980 (in Colin & Danielopol, 1980) and therefore to the “Kovalevskiella lineage” (Colin & Danielopol 1980). It is worth mentioning that in 1965, Danielopol already suggested affinities beteween these forms and the genus Kovalevskiella . . .
Editorial
Authors: Murray John
Published: July 2010

Abstract. The Journal of Micropalaeontology is now well-established as an international publication covering all aspects of microfossils and their applications both in applied studies and in basic research. This has been brought about through the unstinting efforts of the two previous editors, Lesley Sheppard (1982-87) and Mike Keen (1988-94), and their supporting Editorial Boards. Last autumn, the officers of the Society decided that with the appointment of a new editor, the journal should be published through the Geological Society Publishing House. Since becoming Editor in March, my first task has been to implement the arrangements with the Geological Society. The advantages to the BMS are several. First, there is now a clear separation of duties between the Editorial Board, who will handle all aspects of scientific content and quality control of manuscripts accepted for publication, and the Publishing House, who will be responsible for the entire process of publication and distribution. Second, we gain from professional advice over format and layout. Third, the competitive pricing includes advertising in Geological Society publication lists and reciprocal arrangements with other major geological societies throughout the world. The first obvious manifestation of these changes is in the newly designed cover which now includes a list of keywords, the ISSN number and a bar code to conform with modern publishing practice.Another major change of policy concerns the role of the Editorial Board. Previously, each Specialist Group nominated an editor who then handled manuscripts appropriate to his or her specialty. As the number of Groups has
New dinocyst taxa from the Eocene of the North Sea
Authors: Bujak J. P.
Published: July 2010

Abstract. Dinoflagellate cysts (dinocysts) are abundant in the Eocene of the North Sea and provide a high-resolution biostratigraphic zonation. Twelve species are erected to accommodate zonal markers that have not been previously described. These are Areosphaeridium ebdonii, Areosphaeridium michoudii, Cerebrocysta magna, Diphyes brevispinum, Diphyes pseudoficusoides, Hystrichosphaeropsis costae, Hystrichostrogylon clausenii, Membranilarnacia compressa, Phthanoperidinium clithridium, Phthanoperidinium distinctum, Phthanoperidinium powellii and Phthanoperidinium regalis.
‘Nodibeyrichia jurassica’ and associated beyrichiacean ostracode species and their significance for the correlation of late Silurian strata in the Baltic and Britain
Authors: Hansch W. , Siveter David J.
Published: July 2010

Abstract. Taxonomic revision reveals that the beyrichiacean ostracode ‘Nodibeyrichia jurassica’ can no longer be regarded as an index species for the uppermost (late Přídolí) ostracode ‘zone’ of the Silurian of the Baltic region embracing Estonia, Latvia and Baltic-floor derived erratic boulders. The taxon Nodibeyrichia jurassica Sarv, 1968 (non Gailite 1967) is regarded as a junior subjective synonym of Beyrichia protuberans Boll, 1862. Moreover, the material hitherto assigned to ‘Nodibeyrichia jurassica’ is herein considered to belong to two species: Nodibeyrichia protuberans (Boll, 1862) and Nodibeyrichia verrucosa Shaw, 1969. N. verrucosa occurs in England and Estonia, in the basal part and upper part of the Přídolí Series respectively. N. protuberans, as herein restricted, can be used to recognize the late Přídolí, uppermost ostracode assemblage level (N. jurassica Zone of previous literature) of the Silurian only in the central East Baltic (Latvia) and in erratic boulder material found in southern Baltic areas.
New species of unilocular calcareous foraminifera from the Holocene of the southwest Pacific Ocean
Authors: Clark Fred E.
Published: July 2010

Abstract. Four new species of unilocular calcareous foraminifera are described from Holocene sediments of the southwest Pacific Ocean. Vasicostella cranimorpha sp. nov. is distinguished by a lenticular tubule that pierces each margin of the peripheral carina. Globofissurella pattersoni sp. nov. is characterized by a large, produced circular apertural area ornamented in part by costae continuing from the chamber surface. Palliolatella peponisema sp. nov. bears a strong resemblance to a pumpkin seed, and has quite variable development of its central keel. Parafissurina thryptica sp. nov. is distinctly teardrop-shaped, with its greatest diameter near the base, and a mildly acute apertural end.
Deep-water agglutinated foraminifera from the Lower Cretaceous (Neocomian) ‘Complex à Aptychus’ Formation (Corridor de Boyar, Betic Cordillera, southern Spain)
Authors: Kuhnt Wolfgang
Published: July 2010

Abstract. The oldest deep-water sediments of the flysch units in the western part of the Betic Cordillera (southern Spain) arc red and green pelagic claystones with intercalated siliciclastic and carbonate turbidites, ranging from Berriasian to Barremian in age. Autochthonous and redeposited benthic foraminiferal assemblages were studied in outcrops of this ‘Complex à Aptychus’ Formation in the ‘Corridor de Boyar’ near Grazalema. The assemblage of the autochthonous red and green claystones is wholly comprised of agglutinated forms, reflecting deposition beneath the calcium carbonate compensation depth (CCD). Compared to coeval abyssal and deep bathyal assemblages from the NW Australian Margin (Eastern Tethys), the Polish Outer Carpathians and the North Atlantic, the assemblage from the Betic Flysch Zone is more related to its Tethyan equivalents and may represent a truly abyssal Early Cretaceous sub-CCD environment.
Eoguttulina palomerensis, a new foraminiferal species from the Pliensbachian-Toarcian boundary (Early Jurassic) of SW Europe
Authors: Herrero C.
Published: July 2010

Abstract. An Early Jurassic foraminiferal species, reported previously under the name of Eoguttulina sp. 1, from the uppermost Pliensbachian sediments of western Central Portugal, is formally described and its stratigraphical distribution in SW Europe more precisely defined. The short stratigraphic range (uppermost Pliensbachian, spinatum Zone, hawskerense Subzone to lowermost Toarcian, tenuicostalum Zone, mirabile Subzone) and the distinctive morphology of Eoguttulina palomerensis sp. nov. (Lagenina, Polymorphinidae) make it an extremely useful biostratigraphic marker for this boundary interval.
The Flimston Clay, Pembrokeshire, Wales: a probable late Oligocene lacustrine deposit
Authors: Jenkins D. Graham , Boulter M. C. , Ramsay A. T. S.
Published: July 2010

Abstract. Samples from the Flimston Clay have yielded 30 specimens of pollen and spores. The presence of five identified genera of pollen and spores indicates a probable late Oligocene age.
Upper Wenlock miospores and cryptospores derived from a Silurian volcanic island in the Prague Basin (Barrandian area, Bohemia)
Authors: Dufka Pavel
Published: July 2010

Abstract. Highly-diversified assemblages of dispersed trilete miospores and cryptospores belonging to the Artemopyra brevicosla-Hispanaediscus verrucous Assemblage Zone were recovered from upper Wenlock (Silurian) tuffitic shales and limestones in the Prague Basin (Bohemia). The fact that the numerous sporomorphs have only been found in the region of the Svatý Jan Volcanic Centre supports previous sedimentological evidence that this volcanic elevation was emerged during the uppermost Wenlock. Twenty-nine sporomorph forms were determined. One new genus, Rugosisporites gen. nov., and three new species, Rugosisporiies kozlicus sp. nov., Synorisporites maculosus sp. nov. and Artemopyra rugaticosta sp. nov. are described. The comparison with other coeval assemblages is discussed.
Early Palaeocene Parvularugoglobigerina and late Eocene Praetenuitella: does evolutionary convergence imply similar habitat?
Authors: Li Qianyu , Mcgowran B. , Boersma A.
Published: July 2010

Abstract. The species of the earliest Palaeocene planktonic foraminiferal genus Parvularugoglobigerina are characterized by a small test with a smooth, microperforate wall and an elongate aperture. Pore-mound structures may occur on some specimens, while the coiling mode varies from high- to low-trochospiral. Four morphotypes are distinct enough to be recognized as species: P. eugubina (Luterbacher & Premoli Silva) is low spiral and multichambered and P. perexigua n. sp. is four-chambered; P. fodina (Blow) has a Globigerina bulloides-type morphology and P. alticonusa n. sp. has a high trochospire. With the exception of the high spire, this general morphology is repeated in late Eocene forms classified as Praetenuitella: P. insolita (Jenkins), P. patefacta Li, and other associated forms.The two groups acquired their strong similarities – highly distinctive, peculiarly elongated aperture and microperforate walls – through evolutionary convergence, not by being directly related. Stratigraphically they each have a brief occurrence in a geologically significant slice of Palaeogene time: the one during the recovery of ecosystems in the earliest Palaeocene; the other immediately prior to the great cooling and in the time of rapid change known as the Terminal Eocene Event. This study shows that Praetenuitella flourished in eutrophic conditions and that their evolution might have been nutrient-driven. We suggest by morphological pattern analogy that forms of Praetenuitella and Parvulorugoglobigerina reflect similar habitat in their similar form and especially in their aperture.
Cassidulina teretis Tappan and Cassidulina neoteretis new species (Foraminifera): stratigraphic markers for deep sea and outer shelf areas
Authors: Seidenkrantz Marit-Solveig
Published: July 2010

Abstract. Fossil versus Recent specimens allocated to Cassidulina teretis Tappan display slight differences in both ecological distribution and morphology. This has led to a re-examination of specimens from the North Atlantic region. The study was mainly based on scanning electron microscopy. It resulted in the division of the plexus into two species with different stratigraphical and partly different environmental distributions: Cassidulina teretis Tappan and Cassidulina neoteretis n. sp. A distinction between C. teretis and C. neoteretis provides a new biostratigraphical marker and may also prove useful in ecological studies.C. teretis had its first occurrence during the Middle to Upper Miocene and its last well-documented occurrence shortly after the palaeomagnetic Brunhes/Matuyama boundary in the Norwegian Sea, whilst it apparently disappeared from the North Atlantic as early as a little after the Gauss/Matuyama boundary. C. neoteretis presumably evolved from C. teretis between about 2.0 and 2.3 Ma in the northern North Atlantic and migrated northward inhabiting the Norwegian Sea as C teretis became extinct here at about 0.7 Ma. All Recent specimens belong to C. neoteretis.Specimens of C. teretis have been documented from both arctic and boreal regions in inner shelf to bathyal environments (between about 50 and 2000 m water depth), whereas the Recent distribution of C. neoteretis is slightly more limited: arctic and cold boreal regions at water depths between 150 and 3000 m, most commonly between 1000 and 1500 m.
Unusual twin specimens of Nannoconus abundans (Calcareous Nannofossil, Incertae Sedis)
Authors: Van Niel Brigitta
Published: July 2010

Abstract. Monospecific laminae of the species Nannoconus abundans (calcareous nannofossil, incertae sedis) were studied from the Munk Marl of North Jens-1, Danish Central Trough. These laminae contained unusual twin specimens which are considered to represent natural associations, rather than preservation artefacts.
Biostratigraphy and assemblage composition of benthic foraminifera from the Manihiki Plateau, southwestern tropical Pacific
Authors: Schönfeld Joachim
Published: July 2010

Abstract. Pleistocene and late Pliocene benthic foraminifera from the Manihiki Plateau (southwestern tropical Pacific) were studied at piston-core 34KL. A new benthic foraminiferal biozonation is proposed. It comprises the Nodogenerina sagriensis Partial Range Zone from core base to 566.5 cm and the Fissurina seminiformis Partial Range Zone from this level to core top. The boundary is defined by the last occurence of Nodogenerina sagriensis which is time equivalent to the ‘Stilostomella extinction’ in the Eastern Atlantic. High abundances of Cibicidoides wuellerstorfi indicate a strong influence of near-bottom currents. The absence of high-productivity sensitive species reveals a low flux of organic matter to the sea floor from which a considerable amount is adduced by lateral advection.
Dinoflagellate cyst distributions and the Albian–Cenomanian boundary (mid-Cretaceous) at Cordebugle, NW France and Lewes, southern England
Authors: Tocher Bruce A. , Jarvis Ian
Published: July 2010

Abstract. The Albian–Cenomanian boundary successions at Livet Quarry, Cordebugle and Rodmell Cement Works, Lewes are described. Moderately abundant and diverse dinoflagellate cyst assemblages comprising 89 taxa are recorded and related to ammonite, foraminiferal and other faunal data from the two sites. The genus Ovoidinium forms a major component of cyst assemblages from the boundary intervals at both localities. Ovoidinium scabrosum (Cookson & Hughes) Davey is replaced by abundant Ovoidinium verrucosum verrucosum (Cookson & Hughes) Davey close to, and possibly at, the stage boundary, offering a potential dinoflagellate cyst marker for the base of the Cenomanian Stage. The published ranges of a number of species are extended. Six taxa are recorded for the first time from NW Europe: Apteodinium reticulatum Singh, Disphaeria macropyla Cookson & Eisenack, Nematosphaeropsis densiradiata (Cookson & Eisenack) Stover & Evitt and Pervosphaeridium cenomaniense (Norvick) Below occur in the high Upper Albian; Ovoidinium verrucosum (Cookson & Hughes) ostium (Davey) Lentin & Williams and Tanyosphaeridium salpinx Norvick are recorded from the lowest Lower Cenomanian. Increased cyst abundance and diversity at Lewes when compared with Cordebugle is related to the more basinal setting of the former locality.
Recolonization of reef flat by larger foraminifera, Funafuti, Tuvalu
Authors: Collen John
Published: July 2010

Abstract. The ecology of the larger foraminifera is poorly known for western Pacific atolls, despite the importance of these species to the sediment budgets of the atolls. Many beaches and islets (motu) are composed largely of foraminiferal tests derived from reef flat communities; however, populations of larger foraminifera are often under threat or may even have been eliminated by the effects of pollution and development of the reef flats. It is therefore important to understand the rates of response of foraminiferal populations to natural and human changes to their environments.This note reports some observations arising from studies of foraminifera and sedimentation on Funafuti Atoll in the south-central Tuvalu Group, west central Pacific Ocean, at latitude 8°30′S and longitude 179°12′E. The atoll consists of some 39 small islets surrounding a c. 200 km2 lagoon up to 55 m deep (Smith & Woodward, 1992), with reef flats up to several hundred metres wide surrounding the islets on both ocean and lagoon sides.Foraminiferal faunas in the lagoon and on the reef flats are diverse, and include some 8 species of larger foraminifera. Although they do not usually make up more than 40% of the reef flat sediments, because of various concentrating processes, tests of the larger foraminifera (particularly Baculogypsina sphaerulata and Amphistegina lobifera) comprise up to 80% of the sediments forming the main island Fongafale. This foraminiferal component may be even higher for the sands of other atolls, and its significance to the carbonate sediment budget and to problems of coastal erosion. . .
Abdomen wall structure of Holocryptocanium barbui (Radiolaria)
Authors: Ba̧k Marta
Published: July 2010

Abstract. The abdomen wall structure of the cryptothoracic Nassellaria Holocryptocanium barbui Dumitricǎ was studied using scanning electron microscopy. The abdomen wall consists of four layers, all of which have been observed as the ‘outer’ layer of specimens depending upon the different level of preservation. These different stages of abdominal wall preservation have been described previously as two separate subspecies of Holocryptocanium barbui.
Middle Jurassic record of the limnic ostracode genus Rosacythere (Limnocytheridae, Timiriaseviinae): implications on the origin and evolution of the Kovalevskiella group
Authors: Colin J.-P. , Carbonel P.
Published: July 2010

Abstract. Two species of the limnic ostracode genus Rosacythere Colin (Limnocytheridae, Timiriaseviinae) have been identified in the uppermost Bajocian (Middle Jurassic) of the southern part of the Paris Basin, France. This record is the earliest for this genus and for the ‘Kovalevskiella group’ of Colin & Danielopol (1978 Colin & Danielopol (1980). This study also confirms that most of the Timiriaseviinae morphological groups really started to diversify during the Middle Jurassic.
An Early Triassic conodont with periodic growth?
Authors: Shunxin Zhang , Aldridge Richard J. , Donoghue Philip C. J.
Published: July 2010

Abstract. Elements of a new Triassic conodont genus Parapachycladina, from the Lower Triassic Beisi Formation of western Guangxi Province, China, show a characteristic pattern of lamellar edges in the recessive basal margin. The lamellae are grouped in sets of 8–10, with broad interlamellar spaces between each set. If this apparent periodicity reflects annual cycles, the specimens were not more than four years old when they ceased growing.
Globorotalia bouregregensis, a new species of planktonic foraminifer from the latest Miocene–early Pliocene of the Rifian Seaway (northwest Morocco)
Authors: Barbieri Roberto , Ori Gian Gabriele
Published: July 2010

Abstract. Globorotalia bouregregensis, n. sp., is described and documented from the latest Miocene-early Pliocene sequence of the Rifian Seaway, northwest Morocco. By its short stratigraphic distribution, persistence and distinctive morphologic features, the new taxon is well differentiated within the scituline assemblage.
A new dinoflagellate cyst from the Upper Bathonian (Middle Jurassic) strata of the Russian Platform
Authors: Riding James B. , Ilyina Vera I.
Published: July 2010

Abstract. Protobatioladinium? elongatum sp. nov. is a distinctive, large, longitudinally elongate Upper Bathonian (Middle Jurassic) dinoflagellate cyst recorded from western Russia. This species is questionably attributed to Protobatioladinium because the archaeopyle type does not precisely conform to that of the genotype. This form is present, often abundantly, throughout the Upper Bathonian sediments of the central and northern Russian Platform and appears to be a reliable marker species.
Taxonomy, phylogeny and biogeography of the late Famennian conodont genus Mashkovia
Authors: Belka Zdzislaw
Published: July 2010

Abstract. Mashkovia is one of the provincial conodonts which developed during late Famennian time in the cratonic regions of Russia. In this study, the taxonomy of this genus is revised, based on diagnostic characters of the Pa elements, such as the morphology of the anterior part of the platform, the ornamentation and the shape of the secondary keels. As a consequence, four species, including M. silesiensis n. sp. now discovered in Upper Silesia of southern Poland, are distinguished. The apparent absence of Mashkovia from North America, Variscan Europe, Australia and Africa cannot be simply explained by using temperature or other global climatic factors as a reason for the provincialism. Currents and/or local palaeoecologic factors were probably more important in controlling the distribution of these conodonts.
High resolution integrated microbiostratigraphy of the Lower Jurassic (late Pliensbachian–early Toarcian) of central Italy
Authors: Palliani Raffaella Bucefalo , Mattioli Emanuela
Published: July 2010

Abstract. The integrated use of calcareous nannofossil and dinoflagellate cyst events in a study of the late Pliensbachian–early Toarcian interval in central Italy has yielded a high resolution biostratigraphy. The use of both the first and last occurrences of selected taxa belonging to the two phytoplankton groups allows the dating of the sediments with a very refined detail, even when lithologies are unfavourable to the preservation of one fossil group. The evolutionary history of calcareous nannofossils and dinoflagellate cysts during the early Jurassic and its links with global events are responsible for the high potential of this integrated biostratigraphy.
Odontochitina tabulata sp. nov. A Late Santonian–Early Campanian dinoflagellate cyst from SE Sirte Basin, Libya
Authors: El-Mehdawi Ali Daw
Published: July 2010

Abstract. Odontochitina tabulata, a new tabulated ceratioid species, has been recorded and described from core samples in Well C3-65 in the SE Sirte Basin. This species is characterizd by parasutural and pandasutural features reflecting clear gonyaulacacean paratabulation. It has a short stratigraphic range and is considered as a valuable stratigraphic marker for the Late Santonian–Early Campanian. The diagnosis of the genus Odontochitina Deflandre, 1935 is emended to include forms having a well defined gonyaulacacean paratabulation and narrow pandasutural and parasutural ridges.
Mississippian (Lower Carboniferous) miospores from the Cuyahoga and Logan formations of northeastern Ohio, USA
Authors: Clayton Geoffrey , Manger Walter L. , Owens Bernard
Published: July 2010

Abstract. Well-preserved Lower Mississippian (Dinantian) miospore assemblages have been recovered from the upper Cuyahoga Formation (type Wooster Member) and overlying lower Logan Formation (Byer Member) at two localities in Wayne County, northeastern Ohio, USA. All six samples were productive and yielded assemblages that represent the middle Tournaisian Spelaeotriletes pretiosus–Raistrickia clavata (PC) Miospore Biozone of Western Europe including a new species of trilete, acamerate miospore, Mooreisporites streelii, described from the Wooster Shale. Significant numbers of latest Devonian and earlier Carboniferous miospores are reworked into all assemblages. The palynological evidence is consistent with a late Kinderhookian age for most of the Cuyahoga Formation, including its well known ammonoid fauna. However, the position of the boundary between the Kinderhookian and Osagean Series remains uncertain.
Linings of agglutinated Foraminifera from the Devonian: taxonomic and biostratigraphic implications
Authors: Bell K. N. , Winchester-Seeto T. M.
Published: July 2010

Abstract. The organic linings of agglutinated foraminiferans from the Devonian are documented and described. These linings have been recovered in palynological residues from Australia, France, Pakistan and Siberia and range from the Lochkovian to the Frasnian. Six species are described as new: Hemisphaerammina coolamon, Psammosphaera garraay, Reophanus proavitus, Saccammina mea, Saccammina wingarri and Thurammina mirrka. Three species, with a wide geographical spread and a relatively limited stratigraphic range, may prove to have some utility in intercontinental correlation: Inauris tubulata Conkin & Conkin, Saccammina mea n. sp. and Saccammina wingarri n. sp.
Application of neontological taxonomic concepts to Late Eocene coralline algae (Rhodophyta) of the Austrian Molasse Zone
Authors: Rasser Michael W. , Piller Werner E.
Published: July 2010

Abstract. Traditionally, different diagnostic characters have been used in the identification of fossil and Recent coralline algal genera. The taxonomy of fossil coralline algae has focused on well calcified features such as basal filaments and conceptacle perforation. In contrast, the taxonomy of Recent material uses a combination of several features with a low fossilization potential, such as epithallial cells and structures of sexual reproductive organs. In the studied material of the Late Eocene Austrian Molasse Zone Lithoporella, Neogoniolithon, Spongites, Phymatolithon and Sporolithon are identified and described applying features of neontological taxonomic concepts. These features are: (1) the arrangement of basal filaments; (2) the occurrence of cell fusions; (3) the relative length of subepithellial initials; (4) the conceptacle perforation; (5) the orientation of filaments around the conceptacle pore; and (6) the type of conceptacle roof formation. Some of these features were thought to be unpresentable in fossil material until recently. The fossilization potential of diagnostic features and the identification of the documented genera and species are discussed in detail. Moreover, a checklist for the description of fossil taxa is provided.
Designation of holotypes for new species of Iapetonudus Nicoll, Miller, Nowlan, Repetski and Ethington and Iapetognathus Landing
Authors: Nicoll Robert S. , Miller James F. , Nowlan Godfrey S. , Repetski John E. , Ethington Raymond L.
Published: July 2010

Abstract. In the course of publication of a large manuscript on earliest Ordovician conodont species and their utility for biostratigraphy (Nicoll et al., 1999), an error occurred, resulting in the lack of designation of holotypes for the type species of the genus Iapetonudus and some new species of Iapetognathus. Herein, we remedy this error so that the originally published specimens are regarded as fully established holotypes rather than as syntypes in the future.As the original authors of these species, we establish the following holotypes: For the species Iapetognathus fluctivagus Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated on Pl. 11, fig. 6, USNM 498962. For the species Iapetognathus jilinensis Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated as Pl. 14, fig. 4, USNM 498973. For the species Iapetognathus landingi Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated as Pl. 20, fig. 3, USNM 498996. For the species Iapetonudus ibexensis Nicoll, Miller, Nowlan, Repetski and Ethington, we designate the Pa element illustrated as Pl. 23, fig. 3, USNM 499009.
Maria Lejeune-Carpentier (1910–1995): a memorial
Authors: Sarjeant William A. S. , Vanguestaine Michel
Published: July 2010

Abstract. Maria Lejeune was by training a zoologist, working on living and fossil hexacorals. However, over a period of 16 years, she devoted her research attention to the microfossils contained in flakes of Upper Cretaceous flints, some from C. G. Ehrenberg’s classic collection, others from Belgium and the Baltic region. The results were published in 16 short papers, remarkable for the detail and precision of her descriptions and drawings. In addition, she made the first—and, so far, finest—large-scale models of fossil dinoflagellates. These were lodged in the Museum of the University of Liège, where she served as curator for 33 years (1942–1975). Eighteen years after her own micropalaeontological studies had ended, she aided W. A. S. Sarjeant in an extended restudy of her type material, reported in two joint papers.
New Carboniferous (Namurian) glaciomarine ostracods from Patagonia, Argentina
Authors: Saravia Pamela Díaz , Jones Peter J.
Published: July 2010

Abstract. A new ostracod fauna (eight species belonging to five genera) from the lower part of the Levipustula levis Zone of the Pampa de Tepuel Formation, Patagonia is described. It consists of two new species (Aurikirkbya tepuelensis sp.nov., Graphiadactylloides patagoniensis sp.nov.) and six species described informally (Graphiadactylloides sp. aff. G. moreyi Green, G. sp., Mauryella sp., Roundyella? sp. and Scrobicula sp.), including one eridostracan (Cryptophyllus sp.). The assemblage probably lived in a large embayment, in the outer sublittoral (circalittoral) depth biofacies of the continental shelf, on a muddy substrate, within an extraglacial marine facies. Its age is consistent with the currently accepted Early (not earliest) Namurian age for this level.
Campanian to Palaeocene biostratigraphy and palaeoenvironments in the Foula Sub-basin, west of the Shetland Islands, UK
Authors: Van Den Akker T. J. H. A. , Kaminski M. A. , Gradstein F. M. , Wood J.
Published: July 2010

Abstract. For a detailed biostratigraphic framework of the Foula Sub-basin, located west of the Shetland Islands (UK continental shelf), well 205/10-2B is chosen as a reference section. Based on the succession of last occurrence events of nominate taxa, ten stratigraphically distinct Campanian to Palaeocene assemblages are described. The regional applicability of these events is tested by correlation between three wells in the Foula Sub-basin (wells 205/10-2B, 206/3-1 and 206/5-1). Despite some local differences, the biostratigraphy of the Foula Sub-basin compares well with the biostratigraphy of the Western Tethys and the northern North Sea, and is therefore an important link between the southern and northern areas of the Northeast Atlantic margin. A morphogroup analysis of agglutinating foraminifera in well 205/10-2B indicates deposition of Campanian and Maastrichtian mudstones in a well oxygenated, lower bathyal environment, whereas Palaeocene sediments are deposited in a middle to upper bathyal environment.
Revised taxonomy, An Atlas of British Recent Foraminiferids
Authors: Murray John W.
Published: July 2010

Abstract. Since the publication of An Atlas of British Recent Foraminiferids (Murray, 1971) there have been many taxonomic changes. Some result from the revised generic classification summarized by Loeblich & Tappan (1987), some from later taxonomic revision, while others are corrections. In the following list, the name used in 1971 is followed by the revised name. Where the generic assignment is after Loeblich & Tappan (1987) the new name is listed without a reference. OD stands for original designation, i.e. the species is type of the genus. Brief explanations are given as appropriate.Pl. 1: Reophax scottii Chaster = Leptohalysis scottii (Chaster); thin, delicate and flexible test.Pl. 4: Cribrostomoides jeffreysii (Williamson) = Veleroninoides jeffreysii (Williamson); evolute planispiral test with interio-areal aperture (Jones et al., 1993)Pl. 8: Textularia sagittula Defrance group: as was noted on p. 31, this is a complex of variable forms. It includes Textularia bocki Höglund, Spirorutilis wrighti (Silvestri), and Textularia spp. 1–3 of Banner & Pereira (1981).Pl. 9: Textularia earlandi Parker = Morulaeplecta bulbosa Höglund; streptospiral initial end.Pl. 10: Trochammina globigeriniformis (Parker & Jones) var. pygmaea Höglund = Portatrochammina murrayi Brönnimann & Zaninetti, 1984; distinguished from T. g. var. pygmaea (apertural slit without a lip) by having a slit-shaped aperture ‘which extends below the border of the umbilical flap from the first chamber of the final whorl to the penultimate chamber’.Pl. 11: Trochammina ochracea (Williamson) = Lepidodeuterammina ochracea (Williamson); OD.Pl. 12: Trochammina rotaliformis Heron-Allen & Earland = Deuterammina sp.; according to Brönnimann . . .
On the type species of Aubignyna and a description of A. hamblensis, a new microforaminifer from temperate shallow waters
Authors: Murray John W. , Whittaker John E. , Alve Elisabeth
Published: July 2010

Abstract. The genus Aubignyna Margerel, 1970 (type A. mariei) was originally described from the upper Pliocene of NW France. Examination and re-illustration of topotypes of A. mariei Margerel, 1970, the holotype of Buccella planidorso Atkinson, 1969 (from the Recent of Cardigan Bay, Wales) and syntypes of Rotalia perlucida Heron-Allen & Earland, 1913 (from the Clare Island Survey, western Ireland) shows them to be conspecific. Consequently, the type species of Aubignyna becomes R. perlucida, for which a lectotype is chosen. A new species of microforaminifera formally described here is assigned to Aubignyna and shown to occur in a wide range of intertidal–shallow subtidal, brackish–normal marine estuaries and lagoons in Europe and North America.
Diatom fluxes in surface sediments of the Goban Spur continental margin, NE Atlantic Ocean
Authors: Bao Roberto , De Stigter Henko , Van Weering Tjeerd C. E.
Published: July 2010

Abstract. Continental slopes are presumed key areas for deposition of organic carbon exported from the shelf. Analysis of across-slope differences in diatom and silicoflagellate fluxes recorded in bottom sediments of the Goban Spur margin, a typical North Atlantic slope environment, was carried out to test if they can provide information on the magnitude of advection of material from the shelf into deeper waters. Total diatom and silicoflagellate accumulation rates showed strong across-slope differences. Minimum values are recorded at the shelf break where maximum surface productivity conditions occur while the deeper sampling stations record fluxes as high as 183×106 valves cm–2 ka–1. While high diatom fluxes show a clear correspondence with the activity of a permanent bottom nepheloid layer operating in the region, they do not correlate with productivity patterns observed in the water column. Diatom assemblages are mainly composed of Chaetoceros resting spores and Thalassionema nitzschioides (Grunow) Grunow ex Hustedt, typical indicators of spring bloom conditions in the area. The absence of clear across-slope trends in the diatom assemblages is interpreted as the effect of random mixing driven by the strong hydrodynamic regime provoked by the activity of the bottom nepheloid layer. The dominance of Chaetoceros resting spores across the slope is related to important exportation of shelf-derived production. However, due to the broad ecological tolerances of the main taxa composing the diatom assemblages, they do not allow precise estimations on the magnitude of the primary vertical flux vs. the secondary lateral flux in this slope environment. Use of the tychoplanktonic and benthic diatoms, which are restricted to the neritic realm, allows only the estimation of the minimum amount of shelf-derived diatoms reaching the slope sediments (at least 13% of the total diatom assemblage for the upper slope area of the Goban Spur). This study shows that major limitations exist for the use of diatoms preserved in surface sediments of this area as tracers of shelf-derived production transported to the continental slope.
Review of the dinoflagellate cyst Subtilisphaera? inaffecta (Drugg, 1978) Bujak & Davies, 1983 and S.? paeminosa (Drugg, 1978) Bujak & Davies, 1983
Authors: Courtinat Bernard
Published: July 2010

Abstract. Research carried out on the Upper Jurassic dinoflagellate cyst assemblages of the Sub-Tethyan marine realm, show that populations of the dinoflagellate cysts Subtilisphaera? inaffecta and S.? paeminosa are predominant in shallow water marginal marine or brackish environments. The distribution of groups of dinoflagellate cysts, micrhystridid acritarchs and variations of terrestrial inputs represented by phytoclasts are presumed parameters of the salinity balance during such Late Jurassic depositional environments. In this context, the shagreenate to faintly granulate S.? inaffecta appears to be an opportunistic taxon with an ability to prosper in brackish environments. In contrast, the coarsely granulate to pustulate paeminosa form is seemingly less eurytopic and flourishes with success in shallow, marginal marine, environments. SEM studies reveals that the two morphotypes possess transapical archaeopyle sutures on what is usually considered the antapex. Following these observations the cysts are interpreted in a reverse sense. Consequently, the attribution to the genus Subtilisphaera becomes inappropriate. The two morphotypes, interpreted as variants of a single species, are attributed to the genus Corculodinium Batten & Lister, 1988 for which a new emendation is proposed. The specific epithet inaffecta is considered legal over paeminosa.