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The boulders of the Aseelah Unit are composedof exclusively Permian skeletal limestones in asandy matrix; the limestones were deposited on ashallow marine shelf environment from thesouthern Neotethys. The Qarari Unit is interpretedas a hemipelagic series deposited on thedistal slope of the Arabian carbonate platform.The Midian foraminifers from the Batain Plainare similar to some assemblages of Transcaucasia,of the Abadeh area (Iran), of SW Turkey(Taurus Mountains), and some, especially theNeoschwagerinidae, exhibit affinities with microfaunasof the eastern Tethys terranes of Japan.However, similar Neoschwagerinid assemblageswere not found in any significant area of theArabian Peninsula (Oman Mountains, Huqf-Haushi area, and Khuff area).2008040205Notodendrodes hyalinosphaira 的 系 统 发 生 分析 和 属 的 分 异 度 = Phylogenetic analysis andgenetic diversity of Notodendrodes hyalinosphaira.( 英 文 ). Pawlowski J; José Fahrni;Bowser S S. Journal of Foraminiferal Research,2002, 32(2): 173-176Partial small subunit ribosomal DNA (SSUrDNA) sequence analysis was used to determinethe phylogenetic position and genetic diversityof the arborescent agglutinated foraminiferNotodendrodes hyalinosphaira. Our results showthat N. hyalinosphaira is closely related to N.antarctikos, a co-occurring arborescent species.In all phylogenetic analyses employed, both speciesbranched within a well-defined group. Nosequence variations were observed within eitherspecies. However, molecular examination ofdifferent infaunal "quartz sphere" morphotypesattributed to N. hyalinosphaira, among others,reveals the presence of two distinct genotypeswhich may represent as yet undescribed ancestorsof Notodendrodes.2008040206Notodendrodes hyalinosphaira sp. nov. - 一种 似 allogromiid 的 胶 结 有 孔 虫 的 结 构 和 个 体生 态 学 = Notodendrodes hyalinosphaira(sp.nov.): structure and autecology of an allogromiid-likeagglutinated foraminifer. ( 英 文 ).Delaca T E; Bernhard J M; Reilly A A; BowserS S. Journal of Foraminiferal Research, 2002,32(2): 177-187 4 图 版 .We describe Notodendrodes hyalinosphaira, alarge (up to 2.7cm long), facultatively arborescent,agglutinated foraminifer. The species occursabundantly, and apparently exclusively, inExplorers Cove, an embayment of westernMcMurdo Sound, Antarctica. The primary agglutinatedtest is an infaunal, unilocular spherecomprised of a single layer of principally quartzsand grains. Two secondary test features may beassociated with the quartz sphere: (1) a thickcover of fine detrital material and/or (2) one, orrarely two, daisy-shaped appendages extendinginto the water column. These secondary test featuresin Notodendrodes hyalinosphaira apparentlyreflect trophic plasticity, ranging from infaunaluptake of dissolved nutrients to suspensionfeeding. Particle analysis reveals distinctsize-class distributions for each test component,indicating a high degree of particle selection.The cell body (sarcode), which occupies approximatelyhalf of the quartz-sphere volume, isencased by a theca possessing a single aperture.Notodendrodes hyalinosphaira belongs to unilocularagglutinated foraminifera possessing certainstructural similarities with allogromiids.2008040207意 大 利 亚 平 宁 东 北 晚 始 新 世 浮 游 有 孔 虫 对Massignano GSSP 点 显 示 的 地 外 因 素 影 响 的反 映 = Late Eocene planktonic foraminiferalresponse to an extraterrestrial impact at massignanoGSSP(Northeastern Apennines, Italy). ( 英文 ). Spezzaferri S; Basso D; Coccioni R. Journalof Foraminiferal Research, 2002, 32(2):188-199The 4–8m segment of the Global StratotypeSection and Point (GSSP) for the Eocene-Oligocene boundary at Massignano contains awell studied and documented impactoclasticlayer with anomalous concentrations of extraterrestrialiridium, shocked quartz, Ni-rich spinels,impact spherules, and a prominent 3He anomaly.This layer, located at 5.65 m and dated at 35.7 ±0.4 Ma (Late Eocene), appears to be coeval withthe Chesapeake Bay or the Popigai impact structure.We have investigated planktonic foraminifersfrom this interval with the aim of assessingthe effects that the impact may have hadon the environment and this group of organisms.Interpretation of data suggests that the impacthad no abrupt, dramatic effects on planktonicforaminifers. However, since it occurred in astressed environment characterized by gradualand progressive cooling, it enhanced climaticdeterioration and variations in water mass structure.The cooling produced shallowing of thethermocline depth and drastic reduction in abundanceof shallow- and warm-water species. Theshort-term warming episode in the lower part ofZone P16 between 5.8m and 5.9m may be due toa short-term-impact-induced greenhouse episodeand seems to be global in extent. Finally, therelatively long duration of the environmentalperturbation that followed the impact event,which culminated with the Early Oligocenesharp temperature drop, suggests that a feedbackmechanism sustained the initial impact-inducedchanges.65