Patterson R T. Journal of Foraminiferal Research,2001, 31(2): 108-119 1 图 版 .Analysis of sediment samples from the sediment-waterinterface of Point River Bay, northernLake Winnipegosis, a very large lake in centralManitoba, indicates that Cribroelphidiumgunteri, a coastal marine foraminifer, is livingand has adapted to this northern lake environmentin salinities as low as 1–2. In Point RiverBay, summer water temperatures reach 15.6°C,marginally above the minimum 14.5°C requiredfor reproduction by C. gunteri. This benthic foraminifercolonized saline parts of the lake duringthe warm Holocene Hypsithermal (6000–3500 years BP), probably by avian transport.Previous analysis of stratigraphic data suggestedthat C. gunteri had died out in this area as conditionsbecame cooler. This hypothesis had beencorroborated by the post-Hypsithermal retreat ofthe marine range of C. gunteri from the Maritimesof Atlantic Canada to the south of CapeCod, MA. Although recent colonization of thelake cannot be precluded, marine source populationsof C. gunteri are now quite distant, makingthe only viable colonization mode, avian transport,very difficult. The adaptation of the mid-Holocene populations of this species to the progressivelycolder post Hypsithermal climate andoften to extremely low salinity values in LakeWinnipegosis is remarkable. The great abundanceof C. gunteri in sediments of Lake Winnipegosis,in some areas making up most of thesediment, also raises potential concerns aboutthe interpretation of supposed marine sectionsbased exclusively on the presence of foraminifera.2008040236中 新 世 具 极 端 种 内 变 异 的 微 孔 浮 游 有 孔 虫 新属 种 Mutabella mirabilis = Mutabella mirabilisgen. et sp. nov.,a Miocene microperforate planktonicforaminifer with an extreme level of intraspecificvariability. ( 英 文 ). Pearson P N; NorrisR D. Journal of Foraminiferal Research,2001, 31(2): 120-132 5 图 版 .We describe Mutabella mirabilis, a new genusand species of Miocene microperforate planktonicforaminifera. The species is known fromseveral drill sites in the tropical Pacific, Indianand Atlantic Oceans (Deep Sea Drilling Project /Ocean Drilling Program Sites 78, 219, 865, 871,872, 873, 959, and 960). The taxon shows anunusually high level of intraspecific variabilityin chamber shape and arrangement, aperture position,and test ornament. Some specimens possesssupplementary sutural apertures, which mayhave bulla-like coverings. Others possess a compositetooth-plate reminiscent of certain Cretaceousspecies. Mutabella mirabilis first evolvedin early Miocene Biochron M3, and probablybecame extinct in middle Miocene Biochron M7.A morphometric study from Site 872 (west Pacific)demonstrates that substantial shape changeoccurred during its evolution, related to theheight of the trochospiral chamber arrangementand degree of involution of the test. A stableisotopic comparison with other coexisting speciesindicates that M. mirabilis occupied a shallow(mixed layer) planktonic habitat. A strongpositive correlation between test size and 13Cindicates that it probably associated with photosyntheticsymbionts. Mutabella mirabilis seemsto have evolved from the long-ranging speciesGlobigerinita glutinata, with which it fullyintergrades in morphology near the bottom of itsstratigraphic range.2008040237巴 西 Araruanma 地 区 一 个 超 盐 泻 湖 的 有 孔 虫组 合 = Foraminiferal assemblages in a hypersalinelagoon, Araruama (r.j.)Brazil. ( 英 文 ). DebenayJ-P; Geslin E. Journal of ForaminiferalResearch, 2001, 31(2): 133-151 1 图 版 .Foraminiferal assemblages were studied in 93samples collected in the lagoon of Araruama andin the adjacent area. The lagoon of Araruama isone of the largest hypersaline lagoons in theworld, with a salinity range of 52–65 . Historicalreports show that the lagoon has been hypersalinesince at least the 16th century. Foraminiferalassemblages are dominated by miliolids,mainly Triloculina oblonga, and rotaliids, withAmmonia tepida and the less abundant Cribroelphidiumexcavatum var. selseyense. Textulariidsare almost absent. This assemblage is similar tothose usually reported from hypersaline lagoonswith sandy carbonate-rich sediments and fromsalt marshes. A high proportion of aberrant testswas observed. Anthropogenic stresses do notseem to be responsible for these morphologicalabnormalities, which are attributed to high salinityconditions and to changes of salinity. However,the higher proportion of Ammonia tepida inthe more impacted northern part of the lagoon isprobably due to human impact.2008040238Pararotalia cananeiaensis(n. sp.) 对 巴 西 的 海滨 和 近 海 环 境 的 海 洋 影 响 和 水 循 环 研 究 的 意义 = Pararotalia cananeiaensis n. sp.: indicatorof marine influence and water circulation in braziliancoastal and paralic environments. ( 英 文 ).Debenay J-P; Duleba W. Journal of ForaminiferalResearch, 2001, 31(2): 152-163 1 图 版 .Pararotalia cananeiaensis, a new rotaliidspecies from modern shelf sediments of southernBrazil is described. This small species is wellrepresentedalong the southern coast of Brazil. Itwas recorded for the first time in the laguno-76
estuarine complex of Cananéia-Iguape in 1995.It had never been reported before, probably becauseit was confused with juveniles of Ammonia.Its distribution has been studied in Braziliancoastal and paralic environments from Cabo Frio(Rio de Janeiro state) near latitude 22°50'S, toFlorianopolis (Santa Catarina state) near latitude27°35'S. Very small tests of Pararotaliacananeiaensis are easily suspended in Brazilianhigh energy coastal environments and are transportedinward by tidal currents. Their presencein the sedimentary record can be used to gaugethe extent of the effects of this transport mechanismin the estuaries of southern Brazil.2008040239西 班 牙 石 炭 纪 浅 水 浊 积 岩 沉 积 下 蜓 类Ferganites 的 聚 集 = Accumulations of Ferganites(Fusulinacea) in shallow turbidite depositsfrom the Carboniferous of Spain. ( 英 文 ). Villa E;Bahamonde J R. Journal of Foraminiferal Research,2001, 31(3): 173-190As occurs commonly in upper Kasimovianand lower Gzhelian strata from several parts ofEurasia, the lower part of the Puentellés Formation(Cantabrian Zone, NW Spain) contains highconcentrations of reworked Ferganites tests. Noother large fusulinacean taxa are recorded inthese beds, which are interpreted as shallow turbiditedeposits derived from flood-dominatedfan-delta and river-delta systems. These alluvialto shelfal lobes developed in a tectonically activesetting and were located in the proximal sectorsof a marine carbonate ramp, with hyposalinewater conditions. In contrast, the upper memberof the Puentellés Formation contains more variedfusulinacean assemblages, including Ferganitesand other large fusulinaceans. This upperpart is characterized by diverse biota, skeletalwackestone deposits with abundant boundstoneintervals (algal bafflestones and mud mounds),and represents the gradual backstepping fromdetrital lobes and re-establishment of normalmarine conditions, lacking clastic influx fromthe hinterland. The Ferganites species occurringin the lower member seem to have lived in nearshore,high-energy environments in which theirdurable morphology was advantageous. Theseforms seemingly were well adapted to relativelylow salinity conditions, which otherwise greatlyrestricted faunal diversity.Four Ferganites forms from the lower memberof the Puentellés Formation (including a newspecies, Ferganites martinezi) are described.2008040240西 澳 大 利 亚 沿 着 温 度 梯 度 带 的 表 栖 有 孔 虫 =Epiphytic foraminifera along a climatic gradient,western Australia. ( 英 文 ). Semeniuk T A. Journalof Foraminiferal Research, 2001, 31(3):191-200 1 图 版 .The presence of Posidonia australis seagrasshabitat along 1000km of the Western Australiancoast provides an opportunity to study variationin epiphytic foraminiferal populations along aclimatic gradient. Epiphytic foraminifera werecollected in summer and winter from three nearshoreshallow-water sites, which span a north-tosouthgradient in climate from subtropical semiaridto subtropical humid. Living epiphytic assemblagesat each geographic site are distinct.Warmer water assemblages are characterized byPeneroplis spp. Vertebralina, Amphisorus andMarginopora, whereas Lamellodiscorbis andRosalina spp characterize cooler water assemblages.The differences in assemblage compositionpartly reflect a north-to-south change inabundance of species related to climate, but alsoreflect local factors. Trends related to the climaticgradient include a decrease in miliolid andbuliminid specimens and taxa, as well as a decreasein species with tropical affinity fromnorth-to-south. Seasonal sampling at each geographicsite also shows a decrease in miliolidand buliminid specimens and taxa, as well as adecrease in species with tropical affinity betweensummer and winter. This suggests thatboth regional and seasonal differences in epiphyticforaminiferal populations reflect a spatialvs. temporal response to change in sea temperature.Porcellaneous taxa are particularly sensitiveto both regional and seasonal changes in seatemperature and appear to be good indicators ofclimatic setting. Using selected and critical speciesof foraminifera, it is possible to divide thesubtropical region of Western Australia, traditionallyviewed as a single biogeographic province,into at least two sub-climatic regions. Suchrefinement would be useful for interpreting paleoclimaticand paleoenvironmental settings offossil assemblages.2008040241大 西 洋 佛 得 角 高 原 Syringammina corbiculasp. nov. (Xenophyophorea) = Syringamminacorbicula sp. nov. (Xenophyophorea) from theCape Verde plateau, e. Atlantic. ( 英 文 ).Richardson S L. Journal of Foraminiferal Research,2001, 31(3): 201-209 4 图 版 .A new xenophyophore species, Syringamminacorbicula, is described and illustrated from livespecimens collected at 3106m on the CapeVerde Plateau, off West Africa. This species ischaracterized by its epibenthic habitat and theunique basket-like depressions that rim the peripheryof its hemispherically-shaped test of anastomosing,agglutinated tubes. Morphologicalfeatures of the test and cytoplasm of S. corbiculaare described in detail and contrasted with other77
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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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like base referred to Primocandelab
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鱼 类2008040413大 西 洋 鳕
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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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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