aminiferal Research, 2001, 31(4): 294-308 6 图版 .Two sections of Epiligurian sediments(Northern Apennines, Italy) covering thechronostratigraphic interval from the MiddleEocene to the Lower Miocene were analyzed fortheir foraminiferal content. Several specimensbelonging to 25 selected species of agglutinatedforaminifera were analyzed using the energydispersivex-ray spectrometry (EDS) method.The collected data show how these species areselective in composition, size, and shape of theagglutinated grains and cement composition.Test microstructures can be subdivided into fourgroups:– microstructure I: silica cement anddominant quartz and feldspar grains,– microstructureII: indistinct siliceous mass withoutagglutinated grains,– microstructure III: abundantcalcite cement, fine-grained texture, andgrains selected for size and composition,– microstructureIV: scarce calcite cement, a coarsegrainedtexture and non-selected grains. A relationshipbetween test microstructure and paleobathymetricconditions for the Monte Piano Marl,Ranzano Sandstone, and Antognola Marl Formationswas observed. An almost exclusive presenceof agglutinated taxa showing microstructuresI and II characterized the "facies varicolori"of the Monte Piano Marls (lower-middlebathyal depths, from 2000 m to 1000 m). Asharp increase in species showing microstructuresIII and, subordinately, IV characterized theoverlying lithostratigraphic units ("facies grigia"of the Monte Piano Marls, Ranzano Sandstonesand Antognola Marls) whose paleobathymetrydecreases upwards (middle-upper bathyal up toslope/shelf break from 1000 to 200m).2008040249来 自 于 特 提 斯 域 的 新 属 种 Charliella rossae—晚 二 叠 世 双 列 虫 演 化 的 评 述 = Charliella rossaen. gen.,sp., from the tethyan realm:remarkson the evolution of Late Permian Biseriamminids.( 英 文 ). Altiner D; Sevinç Özkan-Altiner.Journal of Foraminiferal Research, 2001, 31(4):309-314 1 图 版 .The name Charliella is proposed for a newbiseriamminid genus characterized by a fourlayeredwall that thickens along the anterior sideof the septa and partially occludes the chambercavity. Charliella rossae was derived from theGlobivalvulina graeca-Globivalvulina vonderschmittilineage which also constituted the rootstock of true Paraglobivalvulina (P. mira) in LatePermian time. The Globivalvulina decrouezae-Septoglobivalvulinagracilis-Paraglobivalvulinoides septulifer lineage is anothertrend in the evolution of biseriamminids.The recognition of such a lineage in the LatePermian necessitates taxonomic revision of thebiseriamminids to attribute globular and involuteforms with thin and undifferentiated walls toSeptoglobivalvulina, a genus which was synonymizedunder Paraglobivalvulina in previouswork.2008040250有 孔 虫 Rotorbinella Bandy, 1944 属 和 它 的 分类 = The genus Rotorbinella bandy, 1944 and itsclassification. ( 英 文 ). Revets S A. Journal ofForaminiferal Research, 2001, 31(4): 315-318 1图 版 .The study of the type series of Rotorbinellacolliculus Bandy, 1944, shows the presence ofcoverplates and thus confirms the rotaliaceannature of Rotorbinella. Notwithstanding preservationaldefects, Rotorbinella can now be distinguishedconsistently from the many genera withwhich it has been confused in the past.2008040251新 种 Cocoarota madrasensis Rajeshwara Raoand Revets n. sp.— 来 自 于 印 度 马 德 拉 斯Bengal 海 湾 内 陆 架 的 一 个 新 的 有 孔 虫 种 类 =Cocoarota madrasensis Rajeshwara Rao and Revetsn. sp.-a new foraminiferal taxon from theinner shelf of the bay of Bengal, off madras, India.( 英 文 ). Rao N R; Periakali P. Journal ofForaminiferal Research, 2001, 31(4): 319-323 1图 版 .Detailed examination of inner shelf sedimentsof the Bay of Bengal, off Karikkattukuppam,south-east coast of India near Madras, revealedquite a few rarely recorded or hitherto unidentifiedtaxa. Of these, one species is a living representativeof the genus Cocoarota Loeblich andTappan, considered to be extinct since the Eocene.The few existing records of this genusfrom the Upper Eocene, exclusively from theAmerican region, and lack of subsequent ones,raise questions with regard to its geographicaldistribution and possible migration since the Eocene.Cocoarota madrasensis n. sp. RajeshwaraRao and Revets is a calcareous, densely perforate(except for the apertural face and sutures),foraminifer characterized by the presence of aseries of irregularly shaped bosses clustered inthe depressed umbilical area, resembling spiralizedornamentation as a result of thickening offolia and inner ends of sutures of earlier whorls.The flaps or folia on the umbilical side hoverover the umbilical aperture that remains open inthe earlier parts of the test. It is one of the moreabundantly occurring species on the inner shelfoff Madras (now Chennai), associated with considerablenumbers of Asterorotalia trispinosa(Thalmann) and A. inflata (Millett), particularlyat depths between 38 and 55m, and on substrate80
with relatively higher mud content. The presentdiscovery necessitates not only extension of thestratigraphic range of the genus Cocoarota butalso a thorough review of the existing literature.2008040252苏 格 兰 北 部 Callovian 期 海 进 - 海 退 旋 回 中 有孔 虫 动 物 群 的 反 映 = Response of foraminiferalfacies to transgressive-regressive cycles in theCallovian of northeast Scotland. ( 英 文 ). JenöNagy; Finstad E K. Journal of ForaminiferalResearch, 2001, 31(4): 324-349 2 图 版 .At Brora on the northwestern margin of theInner Moray Firth Basin, an Upper Bathonian toMiddle Oxfordian (Jurassic) sedimentary successionof marine shales, siltstones and sandstonesis subdivided into four 4th order transgressive–regressive(T-R) cycles. The middletwo of these cycles, B2 and B3, comprise theCallovian Brora Argillaceous Formation whichis the subject of this study, integrating foraminiferal,sedimentological and stratigraphicaldata. The principal factor acting on the foraminiferaldistribution pattern both in cycle B2and B3 is oxygen supply to the benthic environment.The oxygenation is controlled mainly bythe changing water depth during transgressiveand regressive episodes. In the studied faunalsuccession these changes are reflected by twomain biofacies trends: 1) Diversity decrease,accompanied by increasing dominance and decreasingproportion of calcareous taxa. This faunaltrend reflects increasing stagnation duringtransgression. 2) Diversity increase, coupledwith reduction in dominance and expansion inproportion of calcareous taxa. In typical cases,this development reflects improving oxygenationduring regression. The intervals which includethe maximum flooding surface, in both cycle B2and B3, are typified by significantly increasedorganic carbon content and strongly reducedfaunal diversity, developed in dark shales representingsevere oxygen depletion. The transgressivephase of cycle B2 shows a faunal diversitydecrease, while that of cycle B3 reveals a diversityexpansion in its lower part. The regressivephase of both cycles is characterized by a diversityincrease. In addition to these major faunaltrends, the distribution of species and generaappears useful for "fingerprinting" individualcomponents of T-R developments.2008040253非 洲 西 北 地 区 表 层 沉 积 物 中 的 底 栖 有 孔 虫 动物 群 及 其 与 洋 底 有 机 流 的 关 系 = Benthic foraminiferalfaunas in surface sediments off nwAfrica: relationship with organic flux to theocean floor. ( 英 文 ). Morigi C; Jorissen F J.Journal of Foraminiferal Research, 2001, 31(4):350-368Benthic foraminiferal thanatocoenoses werestudied in 29 sediment surface samples off NWAfrica, between 19° and 27°N, and from waterdepths between 506 and 3314 m. The resultswere compared with estimated values of thedownward organic flux and measured bottomwater oxygen concentrations. Although the latter2 parameters show a strong negative correlationin the study area, we argue that the organic fluxis the main controlling ecological factor. On thebasis of an R-mode multivariate statistical analysis,6 species clusters are recognized, which areseparated geographically by differences in organicflux and water depth. The combined samplescores on the first 2 principal componentaxes show a strong positive correlation with theestimated downward organic flux (R2 = 0.83). Itis suggested that this relationship can be used ona local scale as a proxy for paleo-export production,as long as bottom water oxygenation doesnot fall below a critical level.2008040254南 极 州 东 部 Mac.Robertson 陆 架 再 沉 积 的 古新 世 到 始 新 世 的 有 孔 虫 及 其 古 环 境 学 的 意 义= Reworked Paleocene and Eocene foraminifera,Mac. Robertson shelf, east Antarctica: paleoenvironmentalimplications. ( 英 文 ). Quilty P G.Journal of Foraminiferal Research, 2001, 31(4):369-384 3 图 版 .Paleogene planktonic and benthic foraminifera,reworked into young Cenozoic sediments,are recorded from Mac. Robertson Shelf, eastAntarctica. Paleocene and Eocene faunas includerelatively warm water faunas and include Globanomalinapseudomenardii and Globigerinathekakugleri. While all are minor componentsof the faunas, benthic species are more diverseand abundant than planktonic, and allow comparisonsto be made with coeval southern Australian,New Zealand, and South American faunas,at a time when the continents were muchcloser together and Antarctica lacked the currenticesheet. A new species of Ammoelphidiellarepresents the earliest occurrence of this Antarcticgenus, and indicates that an Antarctic bioprovinceexisted for foraminifera, as had alreadybeen recognised in marine microplankton. Theregion yields evidence of relative warmth laterthan envisaged in some models of the early evolutionof the Antarctic icesheet. Inoceramusprisms are evidence for some reworking of Cretaceousmaterial but no undoubted Cretaceousforaminifera have been recovered. Paleogeneshallow water marine sections on Mac. RobertsonShelf are a potential source of valuable informationconcerning the evolution of the Ant-81
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第 4 卷 第 4 期古 生 物 学
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Fossils, i.e. remains of living org
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nus, a new ichnospecies of Fuersich
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以 松 柏 类 和 盾 籽 类 为
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Island, Papua New Guinea. ( 英 文
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A C. Canadian Journal of Earth Scie
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mated depositional interval of 10 t
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北 海 古 近 纪 一 种 新 型
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scabrate-verrucate, and rugulate mi
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the Tetori Group in the Kuzuryu are
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during the Late Pleistocene are rec
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ane have been previously reported f
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Albian-early Paleocene in the Anady
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Poaceae and Plantago lancelata. shr
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long as the humerus plus radius, ve
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members in both size and abundance
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ple's Republic of China. ( 英 文
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K-P transition in Brazil. ( 英 文
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wide tooth crowns, a sub-rectangula
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2008040459罗 马 尼 亚 特 兰
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logical descriptions of all availab
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东 副 特 提 斯 晚 萨 马 期
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S; Vaiani S C. Rivista Italiana di
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adiocarbon dating the arrival of th
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able problems, particularly differe
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done with glyphs on paper. In this
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obtained through extensive field-ba
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noli G; Maletz J; Stouge S. Canadia
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法 国 蒙 塔 格 尼 努 尔 中
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presence of well-rounded, coarse-sa
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缅 甸 北 部 Hukawng 峡 谷 琥
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graphy and Geological Correlation,
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plex,northwestern Iran. ( 英 文 )
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松 辽 盆 地 晚 白 垩 世 青
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ous nannoplankton) points of view.O
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the"Yanshan Movement".During the Mi
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geochemical approach discussed in t
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sediments from the northern shelf o
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意 大 利 北 亚 平 宁 Lamone
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nano record further into the early
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lankovitch-scale frequency. Analyse