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velopment of both the sedimentary and ostracoderecords. In contrast, numerous subordinatefaunal breaks impart a distinctly punctuated patternto both extinction and speciation pathways.Their regular spacing point to rhythmic influencesthat are interpreted to reflect primarilytemperature fluctuations to which ostracodes areknown to react in direct and indirect ways. Inturn, the periodicity of the changes falls withinthe time frame of the Milankovitch Effect or toany one, or a combination, of its three variables.By combining the overall cyclic developmentwith the punctuated progression of both extinctionand speciation events in an "eventstratigraphicchart," a blueprint of the evolutionarydynamics emerges, which can be directlyapplied in sequence-stratigraphic reconstructions.2008040373阿 根 廷 拉 里 奥 哈 Famatina 系 晚 寒 武 世 FiloAzul 段 Volcancrro 组 三 叶 虫 = Trilobites fromthe Volcancrro Formation (Filo Azul Member,Late Cambrian) of the Famatina System, LaRioja, Argentina: systematics and paleoenvironments.( 法 文 ). Tortello M F; Esteban S B.Ameghiniana, 2007, 44(3): 597-620The Filo Azul Member of the VolcancitoFormation (Famatina range, La Rioja, Argentina)consists of a lower part (30m) of thinly laminatedmarls and calcareous shales with intercalationsof fine-grained sandstones, a middle part(85 m) of massive middle to thick-grained calcareoussandstones, and an upper part (50 m) ofshales with interbedded layers of fine sandstones.Previous studies on trilobites, graptolites andconodonts assigned the section to the UpperCambrian-Lower Ordovician. The lower portionof the member (Parabolina frequens argentinaBiozone, lower part) contains a diverse trilobitefauna that was studied by Harrington and Leanzain the 1950s. Since then, new collections havebeen obtained, which are the subject of the presentstudy. New polymerid trilobites, originallydescribed on the basis of scarce material, are reillustrated(Onychopyge riojana Harrington, Asaphellusriojanus Harrington and Leanza,Rhadinopleura eurycephala Harrington andLeanza, Plicatolina scalpta Harrington andLeanza) and the assignations of several taxa arereconsidered (Angelina cf. hyeronimi (Kayser),Parabolinella sp. 1, Parabolinella sp. 2, Pseudokainellatosellii sp. nov., Conophrys sp.)(since the agnostoids have been recently revised,they are not included in this study). The faunacomprises several endemic species. On the otherhand, the occurrence of Parabolina (Neoparabolina)frequens (Barrande) permits the outcropto be correlated with other Upper Cambriansections. The abundance of nutrients in the seabottom must have favoured the development of adiverse trilobite community, which included differentmorphotypes and feeding habits. Severaltaxa were especially adapted to live under lowoxygenconditions, probably in symbiosis withsulfur bacteria.2008040374通 过 综 合 古 生 代 和 全 新 世 蝎 子 的 数 据 对 志 留纪 蝎 子 Proscorpius Osborni (Whitfield) 的 重新 解 释 = Reinterpretation of the Silurian ScorpionProscorpius Osborni (Whitfield): integratingdata from Palaeozoic and Recent Scorpions.( 英 文 ). Dunlop J; Tetlie O E; Prendini L. Palaeontology,2008, 51(2): 303-320The morphology of the Late Silurian (Přídolí)scorpion Proscorpius osborni (Whitfield, 1885a)(Arachnida: Scorpiones), from the Phelps Memberof the Fiddlers Green Formation of NewYork, the 'Bertie Waterlime' of earlier stratigraphicschemes, is revised based on studies ofnew and existing material (a total of 32 specimens).Previous reports of four cheliceral articles,gnathobasic coxae, a labium and gill slits inP. osborni can be dismissed. However, we confirmthe presence of both median and compoundlateral eyes, a pair of tarsal claws, albeit on amore digitigrade foot compared to that of modernscorpions, more than five ventral mesosomalsclerites and a fairly modern pattern of metasomal(i.e. tail) carinae. The co-occurring Archaeophonuseurypteroides Kjellesvig-Waering,1966 and Stoermeroscorpio delicatusKjellesvig-Waering, 1986 are regarded as junior synonymsof P. osborni. Fossil scorpion higher systematicsis plagued by a plethora of unnecessary andlargely monotypic higher taxa and we draw onthe results of Jeram's cladistic analysis from1998 to synonymize formally a series of familiesand superfamilies with Proscorpiidae Scudder,1885.2008040375枝 蝗 科 ( 昆 虫 纲 , 直 翅 目 , 蜢 总 科 ) 化 石 的首 次 发 现 , 及 对 该 科 演 化 及 历 史 生 物 地 理 学的 评 论 = The first fossil Proscopiidae (Insecta,Orthoptera, Eumastacoidea) with comments onthe historical biogeography and evolution of thefamily. ( 英 文 ). Heads S W. Palaeontology, 2008,51(2): 499-507Eoproscopia martilli gen. et sp. nov. is describedfrom the Early Cretaceous (Aptian)Crato Formation Lagerstätte of Ceará State,north-east Brazil. The new taxon is assigned tothe extant family Proscopiidae and represents thefirst occurrence of the group in the fossil record.Eoproscopia is similar to crown group proscopiidsin its stick-like habitus, elongate prothoraxand absence of the cryptopleuron, but differsin the presence of well-developed wings, the118