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Poaceae and Plantago lancelata. shrubs such asErica arborea, Rosaceae, Juniperus and Cistaceaehave certain role in the vegetation. Woodlandswith Pinus sylvestris, P. pinaster andQuercus, Corylus and Betula are also noticeablethroushout the sequence. Non-pollen palynomorphslike Pseudoschizaea circula and Glomusare used to infer the importance of erosive processesin situ. This information shows an openmediterranean landscape, due mainly to humanactivities, and changes in peatbog trophic condition.Changes in values of Alnus, Fraxinus andCyperaceae are used to detected humid changesin the are.The information provided by pH (5,4-6,2)and sediment conductivity serves to assessvegetation and land uses changes.2008040092智 利 中 南 部 四 个 上 三 叠 统 小 植 物 群 = FourUpper Triassic florules from central southernChile (Cerro Ranguili, Cerro Quilvo, CerroGupo and Rio Quillen).. ( 其 他 ). Troncoso A;Herbst R. Ameghiniana, 2007, 44(4): 661-672Four floristic assemblages mentioned in previousliterature from four localities of centralsouthern Chile are described. Localities are:Cerro Ranguili (Estero La Higuera Formation),Cerro Quilvo (La Patagua Formation or "Estratosde Pocillas"), Cerro Gupo (without stratigraphicdenomination) and Rio Quillen (probablyHuimpil-Llafquentue Formation). The plantlist includes: Neocalamites sp., Cladophlebis sp.,Dictyophyllum (T.) rothi Frenguelli, Dictyophyllum(Thaumatopteris) sp., Dicroidium odontopteroides(Morris) Gothan, Dicroidium lancifolium(Morris) Gothan, Dicroidium super-bum(Shirley) Retallack, Zuberia zuberi (Szajnocha)Frenguelli, Xylopteris sp., Pterophyllum sp. a.,Pterophyllum sp. b, Pterophyllum sp. c, Anomozamitessp., Sphenobaiera schenckii (Feistmantel)Florin, Taeniopteris sp. a., Taeniopteris sp. b,Linguifolium cf. lillieanum (Arber) Retallack, ?Linguifolium sp. and Heidiphyllum elongatum(Morris) Retallack. At Cerro Ranguili and CerroGupo there is a certain chronologic control withmarine invertebrates, but in any case the florulesindicate an undoubtedly Upper Triassic age.藻 类2008040093Wilsonidium pechoricum—— 古 新 世 / 始 新 世之 交 一 个 具 异 常 非 对 称 的 沟 鞭 藻 类 新 种 =Wilsonidium pechoricum new species- a newdinoflagellate species with unusual asymmetryfrom the Paleocene/Eocene transition. ( 英 文 ).Iakovleva A I; Heilmann-Clausen C. Journal ofPaleontology, 2007, 81(5): 1020-1030 4 图 版 .Fossil dinoflagellates, when asymmetrical,almost always have features such as antapicalhorns on the right side reduced relative to featureson the left side. A new species here described,Wilsonidium pechoricum, is thereforeunusual in having a reduced left antapical horn.W. pechoricum seems to have originated in thenorthern Tethys in the latest Paleocene. It subsequentlyspread northwards and became widelydistributed in the Peri-Tethys and parts of theArctic region during the short interval known asthe Initial Eocene Thermal Maximum (IETM).The new species was probably favored by extraordinarypaleoecological conditions (high seasurfacetemperatures and probably also high nutrientlevels) prevailing in neritic waters of theIETM; a time during which aberrant morphotypeswere also recorded among other planktonicprotists. The apparent absence of W. pechoricumfrom the North Atlantic region suggests that theTurgay Strait may have functioned as a waterwaybetween the Arctic and Peri-Tethys duringthe IETM. W. pechoricum is the oldest speciesof the genus Wilsonidium and possibly descendedfrom the genus Apectodinium. Its earlyappearance points to a Late Paleocene radiationof the Wetzelielloideae before the well-knownEarly Eocene radiation in the subfamily, and itsmorphology is in accordance with a monophyleticorigin of the group.2008040094基 于 丹 麦 Ristinge Klint 地 区 涡 鞭 毛 藻 化 石 对波 罗 的 海 西 南 地 区 末 次 间 冰 期 (Eemian ) 水文 地 质 条 件 的 研 究 = Last Interglacial (Eemian)hydrographic conditions in the southwesternBaltic Sea based on dinoflagellate cysts fromRistinge Klint, Denmark. ( 英 文 ). Head M J.Geological Magazine, 2007, 144(6): 987-1013A dinoflagellate cyst record with strong Mediterranean/Lusitanianaffinities is described frommarine deposits of Eemian age (Last Interglacial;Late Pleistocene) at Ristinge Klint, Denmark,revealing new information about the hydrographicevolution of the southwestern Baltic Sea.A revised correlation of the pollen record atRistinge Klint with that of the annually laminatedsite at Bispingen in northern Germany providestemporal control. Approximately the firstquarter of Eemian time is represented. A marineingression into a lake took place during theQuercus rise, about 300 years into the interglacial,and is marked by low (< c. 3 psu) salinitiesat the base of the Cyprina Clay that increasedprogressively. An abrupt and significant rise inthe inflow of warm, saline waters from the NorthSea occurred at about 750 years into the interglacial(the Corylus rise), and at about 1900 yearsinto the interglacial, strongly stratified watersdeveloped. Higher in the Cyprina Clay and continuingto its top, at nearly 3000 years into theinterglacial, more open-marine waters are indi-28