Untitled

gaceae?). The wood of the Malvaceae fossilplant is characterised by the presence of vesselrayand vessel-parenchyma pits with reducedborders, larger than the intervascular pits, scantyparatracheal parenchyma, septate fibres and storiedstructure. This wood type, Javelinoxylon,has been also found in the Maastrichtian JavelinaFormation, Texas. Aggregate and uniseriate homocellularrays, apotracheal diffuse and diffusein aggregates parenchyma, simple perforationplates, vessel-ray pits variable with reduced bordersand vasicentric tracheids relate the wood ofa second plant to Quercinium. The third woodtype, Sabinoxylon pasac Estrada-Ruiz, Martínez-Cabrera et Cevallos-Ferriz, is very similar tosome species of Quercinium; however, the presenceof heterocellular rays and the almost exclusivepresence of scalariform perforation platesmake unlikely its relationship with this genus.Since observation of vessel parenchyma andvessel ray pits was not possible, its inclusion inFagaceae cannot be confirmed. Nevertheless, S.pasac and Quercinium centenoae Estrada-Ruiz,Martínez-Cabrera et Cevallos-Ferriz representthe earliest record of fagaceous plants in Mexico,while the presence of Javelinoxylon weberiEstrada-Ruiz, Martínez-Cabrera et Cevallos-Ferriz extends the geographic distribution of thegenus in North America.2008040141马 斯 特 里 赫 特 型 地 区 ( 马 斯 特 里 赫 特 阶 , 丹宁 阶 , 比 利 时 东 北 部 , 荷 兰 东 南 部 ) 的 海 草叶 化 石 = Seagrass foliage from the Maastrichtiantype area (Maastrichtian, Danian, NEBelgium, SE Netherlands). ( 英 文 ). van der HamR W J M; van Konijnenburg-van Cittert J H A;Indeherberge L. Review of Palaeobotany andPalynology, 2007, 144(3-4): 301-321Seagrasses are the only angiosperms that haveinvaded the marine environment. Fossil seagrassesare rare and received only little attentionto date. However, among the scarce plant fossilsin the marine deposits of the Maastrichtian typearea, remains of seagrasses are relatively common.The present paper provides a detailed descriptionof the morphology and anatomy of theleaves. Maastrichtian and Danian material isconsidered here as a single species: Thalassotaeniadebeyi gen. nov., sp. nov. Campanian materialis assigned to Zosterites, but this is notnecessarily a seagrass.Thalassotaenia includesthe oldest anatomically preserved material ofseagrass leaves. Comparison with extant seagrassesshows that there is not an easy matchwith any of the extant genera or families. Amphibolisand Thalassodendron (Cymodoceaceae)and Posidonia (Posidoniaceae) show the greatestresemblance. Possibly, Thalassotaenia representsthe leaves of an ancestor of the Cymodoceaceae–Posidoniaceae(–Ruppiaceae) cladefound in several phylogenetic analyses. BecauseThalassotaenia also shows some features notfound in extant seagrasses, it might also representan extinct clade of seagrasses.2008040142阿 根 廷 卡 塔 玛 卡 省 下 上 新 统 Andalhuala 组 古植 物 群 ( 豆 科 和 漆 树 科 ) = Paleoflora (Fabaceaeand Anacardiaceae) from the AndalhualaFormation (Lower Pliocene), Catamarca Province,Argentina. ( 法 文 ). Anzotegui L M; Horn Y;Herbst R. Ameghiniana, 2007, 44(3): 525-535A leaf impression flora from the Pie delMedano locality, (on national route 40, km 914-915) in Catamarca Province, is described. Itcomes from the Andalhuala Formation, which atthat locality was dated as 5.22 +/- 0.9 W, indicatinga Lower Pliocene age. The flora is composedof Fabaceae (Prosopis sp. a, Eriosemapliocenica Anzotegui and Horn sp. nov. andMacroptilium sp.) and Anacardiaceae (Lithrea sp.and Schinus aff. terebinthifolia Raddi). The associationindicates a warm climate, xerophytevegetation and riparian vegetation along riverbanks.2008040143北 美 洲 西 部 晚 古 新 世 茶 茱 萸 科 Iodeae 族 果 实化 石 = Fruits of Icacinaceae (Tribe Iodeae) fromthe Late Paleocene of western North America.( 英 文 ). Pigg K B; Manchester S R; DeVore M L.American Journal of Botany, 2008, 95(7): 824-832 4 图 版 .The Icacinaceae occur pantropically today,but are well represented by fossil fruits of thewarm Early Middle Eocene, when tropical plantsthat currently occupy low latitudes were morewidely distributed in higher latitudes. Membersof this family are first known in the Late Cretaceous;however, fossil fruits of tribe Iodeae arequite rare before the Eocene. In this paper wedescribe the first formally recognized Late Paleoceneicacinaceous taxa from western NorthAmerica. We name two new species of Icacinicaryabased on anatomically preserved fruitsand establish a new genus, Icacinicaryites, forimpressions with a strong similarity to Icacinicaryathat lack anatomical preservation.These new records from the Almont/BeicegelCreek flora in North Dakota and several localitiesin Wyoming, Colorado, and Montana complementrecords known from the Early Eoceneof England and document an increased diversityof Iodeae and related forms in the Paleogene ofwestern North America.古 无 脊 椎 动 物 学43