Untitled

increscens, R. decrescens, S. guizhouensis and C.costatus) or tetragonal (Q. orbigoniatus) tubeswith closely spaced cross-walls. Ramitubus hasmostly complete cross-walls, whereas all othertaxa have regularly intercalated complete andincomplete cross-walls. Some of them branchdichotomously (R. increscens and R. decrescens),others have a longitudinal ridge running along acurved tube (C. costatus).The palaeoecology, ontogeny, and phylogeneticaffinity of these microfossils are still uncertain.They probably represent nonbiomineralizingorganisms in the Ediacaranocean. Ramitubus (and possibly all other morphotaxadescribed in this paper) was probablybenthic and grew unidirectionally and episodically.The incomplete cross-walls could havebeen formed through terminal addition or, alternatively,through intercalary insertion. It is possiblethat some or all morphotaxa described mayrepresent ontogenetic or ecophenotypic variationsof one or a few closely related biologicalspecies. If so, then the combination of morphologicalfeatures (complete and incomplete crosswalls,tetraradial symmetry, and longitudinalridge) can negate a cyanobacterial or algal interpretation,and point to a tentative cnidarian affinity.古 植 物 学综 论2008040079中 国 植 物 细 胞 化 石 的 首 次 观 察 = The FirstObservation on Plant Cell Fossils in China. ( 英文 ). Wang Xin; Cui Jinzhong. Acta GeologicaSinica, 2007, 81(1): 16-22For a long time, paleontologists have been focusingon hard parts of organisms during differentgeological periods while soft parts are rarelyreported. Well-preserved plant cells, if found infossils, are treated only as a rarity. Recent progressin research on fossil cytoplasm indicatesthat plant cytoplasm not only has excellent ultrastructurespreserved but also may be a quitecommonly seen fossil in strata. However, up tonow there is no report of plant cell fossils inChina yet. Here plant cell fossil...2008040080俄 罗 斯 滨 海 南 部 Partizanskaya 河 盆 地 晚 三 叠世 植 物 群 = Late triassic flora of the PartizanskayaRiver basin (Southern Primor’e). ( 英 文 ).Volynets E B; Shorokhova S A; Sun Ge. Stratigraphyand Geological Correlation, 2008, 16(1):47-58Flora from the lower Norian deposits of theUpper Triassic, which are exposed in the PartizanskayaRiver basin, has been studied in detail.A new Imalinovo floral assemblage is distinguished.As is established, its taxonomic compositionis represented by abundant cycadophytesand conifers occurring in association with insignificantferns and czekanowskialeans, rarehorsetails, pteridosperms, and ginkgoaleans. Thestudied floral assemblage is compared with severalfloras of East Asia: the Mongugai flora ofPrimor’e, the Tianqiaoling flora of northeasternChina, the Yamanoi and Nariwa floras of Japan.2008040081新 西 兰 极 濒 危 鹦 鹉 Kakapo(Strigops habroptilus)粪 化 石 中 微 体 植 物 化 石 的 分 析 =Plant microfossil analysis of coprolites of thecritically endangered kakapo (Strigops habroptilus)parrot from New Zealand. ( 英 文 ). HorrocksM; Salter J; Braggins J; Nichol S;, Moorhouse R;Elliott Graeme. Review of Palaeobotany andPalynology, 2008, 149(3-4): 229-245We present here the results of the analysis ofpollen, spores, starch and other microscopicplant material in 52 coprolites of the criticallyendangered kakapo (Strigops habroptilus), aNew Zealand endemic parrot. The six samplingsites (caves, rock overhangs) are in widely separategeographic regions in the South Island,across an altitudinal range encompassing lowland,montane and sub-alpine environments. Radiometrictesting gives average ages of discretecoprolite groups ranging from modern to2514 ± 43 14 C yr BP (Wk-19164). A wide varietyof plant taxa is identified in the coprolites,comprising cones, flowers, leaves and fronds of~ 30 podocarps, dicotyledonous trees, shrubsand lianas, grasses, ferns, lycopods, mosses andliverworts. This supports previous observationsthat kakapo are versatile feeders, using a broadspectrum of foods that may only be available forshort periods and intermittent years. Many of thefood taxa we identify are consistent with thestudies of modern kakapo diet. We also identifyseveral new foods, potentially of value in developingfood supplements to increase breedingfrequency of the current kakapo population. Themost commonly identified plant parts in coproliteswere fern fronds (monoletes, Hymenophyllum,Cyathea smithii), followed by podocarpcones and leaves. Lack of starch in the coprolitessuggests that the lycopod and fern rhizomes reportedin modern kakapo diet were not commonlyeaten. The data provide initial botanicalevidence of diet from coprolites of an extant bird.2008040082阿 纳 德 尔 - 科 利 亚 克 和 北 阿 拉 斯 加 亚 地 区 阿 尔比 期 - 早 古 新 世 的 古 植 物 群 比 较 第 三 部 分 跨越 白 垩 纪 - 古 近 纪 界 线 的 植 物 群 和 植 物 区 系 变化 的 比 较 = Comparative paleofloristics of the25