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most complete OAE 2 sections. While plankticspecies diversity shows relatively minor changeacross the OAE 2 interval, extinction of the rotaliporidsand Globigerinelloides bentonensis, ashift to Heterohelix-dominated assemblages, andincreased abundance of helvetoglobotruncanidsat the onset of OAE 2 cause a dramatic changein the planktic foraminifer assemblage composition.The rotaliporid extinction occurs at thelevel where middle bathyal temperatures are estimatedto have increased from 15 to 19 degreesC, which is warmer than any other time duringthe Cretaceous and Cenozoic. This deep waterwarming may have caused a breakdown in thevertical structure of the water column, and couldexplain the extinction of deeper dwelling plankticspecies, including Rotalipora and G. bentonensis.On the other hand, sea surface temperatureestimates based on planktic foraminiferaldelta 18 O values (corrected for salinity) remainsteady throughout the CTBI, varying between 23to 26 degrees C. The presence of volcaniclasticsediments within the OAE 2 interval at Site 1050is consistent with previous suggestions that theCTBI was a time of anonymously high rates ofCO 2 flux into the atmosphere and oceans duringa major phase of explosive volcanic activity andlarge igneous province emplacement in the Caribbeanand other regions worldwide. Furtherinvestigation of the CTBI is needed to establishwhether increased PCO 2 can be accepted as theprimary forcing mechanism for the middle Cretaceous"supergreenhouse".2008040288新 属 Praepararotalia 和 Antarcticella Loeblichand Tappen 属 的 底 栖 古 生 境 = A benthicpaleohabitat for Praepararotalia gen. nov.and Antarcticella Loeblich and Tappan. ( 英 文 ).Liu C J; Olsson R K. Journal of ForaminiferalResearch, 1998, 28(1): 3-18 4 图 版 .Globorotalia inconspicua Howe, G. aculeataJenkins, G. Perclara Loeblich and Tappan (seniorsynonym of G. reissi Loeblich and Tappan),Globigerina pauciloculata Jenkins, andCandeina antarctica Leckie and Webb are Cenozoicspecies interpreted to have been adaptedto a planktic habitat. Their restriction, however,to shallow marine or marginal marine paleoenvironmentssuggests that they were benthic species.These taxa are associated with reduced plankticforaminiferal diversity, a low P/B (planktic/benthic)ratio, and an inner shelf benthic foraminiferalbiofacies. A new genus, Praepararotalia,is erected for several species interpreted tobe phylogenetically related to the benthic genusPararotalia. Praepararotalia cretacea (newspecies), which is described from the MaastrichtianNavesink Formation in New Jersey,gave rise to the early Paleocene species Praepararotaliaperclara. In addition, stable isotopic(delta 18 O and delta 13 C) signatures ofall praepararotaliid species in this study clustercloser to benthic foraminiferal signatures and aredistinct from normal marine planktic taxa fromthe Cretaceous and the Paleocene. A benthicpaleohabitat is suggested for the Danian speciesAntarcticella pauciloculata (Jenkins) because ofits dominant occurrence in shallow facies ofmarginal basins in the southern high latitudes.The species may be phylogenetically linked to P.cretacea n. sp. and is apparently the stem taxonof a Southern Ocean Paleogene evolutionarylineage that includes A. cecionii (Canon andErnst), A. zeocenica (Hornibrook and Jenkins),and A. antarctica (Leckie and Webb).2008040289Insolentitheca emend., Protoinsolentitheca n.gen. 和 Caligellidae 科 , 它 们 是 古 生 代 有 孔 虫的 永 久 胞 囊 ? = Insolentitheca emend., Protoinsolentithecan. gen. and Caligellidae emend.,permanent cysts of Palaeozoic foraminifera?. ( 英文 ). Vachard D; Cozar P. Rivista Italiana di Paleontologiae stratigrafia, 2004, 110(2): 591-603Insolentitheca was interpreted as a microproblematicum,a foraminiferal test, or a syxygialcyst. Protoinsolentitheca fundamenta n. gen. n.sp. is described, which links Insolentitheca andthe Caligellidae. Some elements of nomenclatureaqre introduced to describe the particular tests ofthe Caligellidae. These taxa could be basicallyrepresented by an infaunal naked or chitinaceousforaminifer, which secreted during its lifetime acalcified perimeter denominated the chimney,only present in the Caligellidae. To this initialsecretion are added two types of “agglutinated”and bioeroded tests: the fundamental in Protoinsolentithecaand Insolentitheca, land the bricks,in Insolentitheca only.2008040290Basque–Cantabrian 盆 地 和 西 班 牙 东 南 部 的底 栖 有 孔 虫 记 录 : 白 垩 - 古 近 纪 界 线 事 件 后深 海 洋 底 生 物 群 的 恢 复 = Recovery of thedeep-sea floor after the Cretaceous−Paleogeneboundary event: The benthic foraminiferal recordin the Basque–Cantabrian basin and inSouth-eastern Spain. ( 英 文 ). Alegret L. PalaeogeographyPalaeoclimatology Palaeoecology,2008, 255(1-2): 181-194A detailed analysis of the Upper Cretaceousand lower Paleogene benthic foraminiferal assemblages(> 63 μm) from the middle bathyalLoya section (Basque–Cantabrian Basin, SouthwesternFrance) has been carried out. The benthicforaminiferal and palaeoenvironmentalturnover across the K/Pg boundary at Loya hasbeen compared to that observed in the nearby94