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includes the Pulleniatina group, Neogloboquadrinadutertrei, Globorotalia tumida and G.menardii. Group B is dissolution resistant andalso characterizes the Kuroshio Current. (2)Group C consists of Neogloboquadrina pachyderma(dextral), N. incompta and Turborotaliainflata, all indicative of "relatively cold" water.(3) Group D composed of Globigerina bulloidesand Globigerinella calida suggests influence ofcoastal water invasion.2008040275加 拿 大 Territories 西 北 Bylot 岛 全 新 世 淡 水湖 泊 中 的 有 壳 变 形 虫 = Holocene Thecamoebiansin freshwater lakes on Bylot Island, NorthwestTerritories, Canada. ( 英 文 ). Kliza D A;Schroeder-Adams C J. Journal of ForaminiferalResearch, 1999, 29(1): 26-36 3 图 版 .Thecamoebian assemblages were studied intwo short cores from kettle lakes on Bylot Island,Canadian high arctic, within an area bounded by72 degrees and 74 degrees N and 75 degrees and82 degrees W. Cores did not provide suitablematerial for absolute age dating. Based onknown sedimentation rates of other arctic lakes,however, the time interval covered by lake coresreflect sedimentation during the Holocene ofapproximately the last 5000 years. On the BylotIsland lowlands, a low species diversity witheleven thecamoebian species was identifiedwhereas five lakes sampled on the Salmon Riverlowlands around Pond Inlet were barren of thecamoebians.Thecamoebian tests typically havea coarse texture. The shallower of the two lakeson Bylot Island is dominated by Difflugia globulus.The assemblage found in the deep lake containsnine taxa with a distinct transition fromDifflugia globulus dominance in the lower halfof the core to a Difflugia oblonga dominatedassemblage in the upper half. D. oblonga prefersorganic-rich substrates and its dominance coincideswith an increase of organic material in thecore. Late Holocene thecamoebian abundancefluctuates in the shallow lake whereas the deeplake is characterized by more constant numbers.Faunal results in both lakes show that local environmentalfactors have to be considered to explainpaleolimnological changes.2008040276异 时 性 对 Morozovella angulata 的 地 层 产 出的 影 响 = The influence of heterochrony on thestratigraphic occurrence of Morozovella angulata.( 英 文 ). Kelly D C; Arnold A J. Journal ofForaminiferal Research, 1999, 29(1): 58-68 3 图版 .Praemurica uncinata displays pronouncedallometry during its evolutionary transformationinto Morozovella angulata, an important speciesin Paleocene planktic foraminiferal biostratigraphy.The allometry is such that smaller specimensof P. uncinata resemble large specimens ofthe descendant, M. angulata. Biometric analysisof populations spanning this paedomorphic evolutionarytransition reveals that the event is recordedover an interval of 10.69 meters in sedimentsfrom the DeSoto Canyon, Gulf of Mexico,and involves specimens ranging in size from lessthan 100 to more than 300 mu m. Over this sizerange, failure to recognize the interdependenceof size and shape can lead to discordant zonationswhen biostratigraphers identify the firstappearance datum of Morozovella angulata afterusing different sieve sizes during standard laboratorytreatment of their samples.2008040277埃 及 沙 漠 西 部 的 Nummulites luterbacheri 的早 期 进 化 演 化 特 征 = Early progressive evolutionaryfeatures in Nummulites luterbacheri fromthe Western Desert of Egypt. ( 英 文 ). Wielandt U.Journal of Foraminiferal Research, 1999, 29(2):130-142 2 图 版 .Detailed morphometric data on the recentlydiscovered nummulitid Nummulites luterbacherifrom the earliest Eocene of the Western Desertof Egypt are presented and the description of thespecies is emended.The microspheric generationis 4 to 5 times larger than the largest individualsof all other associated nummulites and even itsmacrospheric forms are larger than the microspheresof these others. particularly the size ofthe proloculus in the A-forms, spiral multiplication,the development of several small polarpiles, and the complex septal fluting are veryprogressive characters and exceptional amongsuch early Ypresian nummulites. N.luterbacherifits in none of the pubished phylogenetic lineagesbut does show some affinity toN.praecursor and N.atacius. The morphologicalcharacters of Nummulites luterbacheri indicatean evolutionarily advanced species yet it cooccurswith some of the first and most primitivenummulites: N. deserti, N.solitarius and N.fraasi. Thus several architectural elements occurin Nummulits luterbacheri long before they aregenerally thought to have developed during thephylogeny of the genus.2008040278有 机 炭 变 化 对 底 栖 有 孔 虫 的 含 量 和 分 布 模 式的 影 响 = Scaling percentages and distributionalpatterns of benthic Foraminifera with flux ratesof organic carbon. ( 英 文 ). Altenbach A V;Pflaumann U. Journal of Foraminiferal Research,1999, 29(3): 173-185Seafloor organic matter flux from marine primaryproductivity is quantified, and the range of89