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margin of the southwest Caribbean. ( 英 文 ).Rincón D A; Arenas J E; Cuartas C H; CárdenasA L; Stratigraphy, 2007, 4(4): 261-311Biostratigraphy in northern Colombia has traditionallybeen done using foraminifera. Quantitativebiostratigraphic techniquescould improvethe zonations that have been proposed for theregion. We analyze the biostratigraphic informationfrom 190planktonic foraminifera species,and 1961 ditch-cutting samples from 26 oil wellsin northern Colombia to produce a zonation fortheregion. A quantitative biostratigraphic techniqueknown as Constrained Optimization wasused to analyze the data.The proposed zonationrelies exclusively on last occurrences, which arereadily applied to petroleum exploration. It hasthirteenzones and eight subzones for the Eoceneto Pliocene interval. Three zones and two subzonesare defined for the Eocene, three zones forthe Oligocene, six zones and six subzones for theMiocene, and one zone for the Pliocene. Thezonation reveals three major unconformities:(1) a late Eocene - early Oligocene hiatus; (2) alate Oligocene - early Miocene hiatus; and (3) alate Miocene hiatus; the hiatusesare related tothe collision of the Caribbean with the SouthAmerican plate.2008040329中 国 南 方 埃 迪 卡 拉 生 物 群 中 的 八 射 螺 旋 状 生物 = Octoradiate Spiral Organisms in the Ediacaranof South China. ( 英 文 ). Tang Feng; YinChongyu; Bengtson S; Liu pengju; WangZiqiang; Gao Linzhi. Acta GeologicaSinica, 2008, 82(1): 27-34Shales of the Ediacaran Doushantuo Formationof South China contain a new disc-shapedmacrofossii, Eoandromeda octobrachiata, characterizedby eight spiral arms that were probablyhoused within an outer membrane.Although thepresence of eight radiating structures entails aresemblance to cnidarian octocorais as well as toctenophores,direct homologies with these extantgroups are unlikely.Instead we bring attention tothe helicospiral morphology of newly reportedembryos from the Doushantuo Formation,suggesti...古 杯 、 多 孔 及 腔 肠 动 物2008040330得 克 萨 斯 瓜 达 鲁 普 山 国 家 公 园 南 部 Bell Canyon组 Reef Trail 段 上 部 的 六 射 海 绵 和 伴 生 的其 他 海 绵 = Hexactinellid and associatedsponges from the upper Reef Trail Member ofthe Bell Canyon Formation, southern GuadalupeMountains National Park, Texas. ( 英 文 ). Rigby JK; Bell G L; Thompson K. Journal of Paleontology,2007, 81(6): 1241-1256 6 图 版 .A small faunule of silicified hexactinellidsponges and root tufts has been recovered fromthe upper Guadalupian Reef Trail Member of theBell Canyon Formation, from the Patterson Hills,in the southwestern part of the Guadalupe MountainsNational Park in western Texas. Somedemosponges from the type section of the ReefTrail Member, near the mouth of McKittrickCanyon on the front of the Guadalupe Mountainsin the park, have also been documented. Includedin the faunule from the Patterson Hillslocalities are the new amphidiscosid hexactinellidpelicasponge Trailospongia reischi n. gen.and sp., the questionable pelicaspongiid Hexirregularianana n. gen. and sp., and the dictyospongiidhexactinellids Microstaura doliolumFinks, 1960, and Microstaurella minima n. gen.and sp., and Microstaurella parva n. gen. and sp.They are associated with specimens of the lyssacinosidbrachiosponges Toomeyospongiellagigantia Rigby and Bell, 2005, Toomeyospongiamodica n. sp., and Toomeyospongia minuta n.gen. and sp., and fragments of three differenttypes of root tufts, termed Tufts 1, 3, and 4. Twospecimens of the new cylindrical demospongeMckittrickella pratti n. gen. and sp. are associatedwith Tuft 2 in the collection from the typesection of the Reef Trail Member, and a thirdspecimen was collected from the member in thePatterson Hills. These sponges from Localities1–7 are the youngest Permian sponges knownfrom the region, and possibly from North America.2008040331英 格 兰 和 法 国 侏 罗 纪 微 壳 管 状 蠕 虫 = Microconchidtubeworms from the Jurassic of Englandand France. ( 英 文 ). Vinn O; Taylor P D. Actapalaeontologica Polonica, 2007, 52(2): 391-399The Bajocian tubeworm Spirorbis midfordensis,previously regarded as a spirorbid polychaete,is reinterpreted as a microconchid andassigned to Punctaconchus gen. nov. along withtwo new species, Punctaconchus ampliporus sp.nov., the type species of the new genus, andPunctaconchus palmeri sp. nov.. Microconchidsare a mostly Palaeozoic group of tubeworms thatare probably more closely related to modern lophophoratephyla than they are to polychaetes.2008040332帕 米 尔 山 脉 中 三 叠 世 似 六 射 珊 瑚 Furcophyllia= The Middle Triassic scleractinia-like coralFurcohyllia from the Pamir Mountains. ( 英 文 ).Melnikova G K; Roniewicz E. Acta palaeontologicaPolonica, 2007, 52(2): 401-406Furcophyllia is an unusual coral with septaregularly splitting into branching sets called septalbrooms. This pattern of septal apparatus is soalien to scleractinians, that, despite a trabecular106