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1.
描述并厘定了黑龙江省嘉荫县古新世乌云植物群中的广义山茱萸科绝灭类型镘形美中果(Amersinia obtrullata Manchester, Crane et Golovneva)和假古老白令叶(Beringiaphyllum pseudoantiquum (Golovneva) Manchester, Crane et Golovneva).将前人鉴定为昆栏树属(未定种)(Trochodendron sp.)的果序化石归入镘形美中果;将前人确定为鲜艳杨(Populus carneosa)、假原始叶南蛇藤(Celastrophyllum subprotophyllum)、古老荚(Viburnum antiquum)、粗糙荚(V. asperum)、疏齿荚叶(Viburniphyllum finale)、乌云原始叶(Potophyllum wuyunense)、海丹原始叶(近似种)(P. cf. haydenii)、卵圆原始叶(P. ovatifolium)和不规则克里木(Credneria inordinata)等归入假古老白令叶.  相似文献   

2.
根据叶结构特征,将黑龙江省古新世乌云植物群中的榆科叶化石确定为叉脉榆(Ulmus furcinervis (Borsuk) Ablaev),叶化石二级脉达缘且在叶缘区分叉、三级脉及顶、叶缘锯齿两侧边凸出.重新研究了前人鉴定为小叶普拉榆(Planera cf. microphylla auct. non Newberry)和乌云珍珠梅(Sorbaria wuyungensis Tao et Xiong)的叶化石并将其归入叉脉榆.  相似文献   

3.
林祁   《广西植物》1999,19(4):334-336
对国产黄杨科5 种植物作了分类学修订或补充: 将雀舌黄杨归入匙叶黄杨, 中间黄杨归入黄杨, 多毛板凳果归入板凳果, 双蕊野扇花归入羽脉野扇花; 恢复黄杨和尖叶黄杨的原学名;报道宜昌黄杨在湖南的新记录。  相似文献   

4.
中国东北古新世乌云植物群:榆科叉脉榆   总被引:1,自引:0,他引:1  
根据叶结构特征。将黑龙江省古新世乌云植物群中的榆科叶化石确定为叉脉榆(Umus furcinervis(Borsuk)Ablaev)。叶化石二级脉达缘且在叶缘区分叉,三级脉及顶,叶缘锯齿两侧边凸出。重新研究了前人鉴定为小叶普拉榆(Planera cf.microphylla auct.non Newberry)和乌云珍珠梅(Sorbaria wuyungensis Tao et Xiong)的叶化石并将其归入叉脉榆。  相似文献   

5.
槲栎叶复合群及其地史学和系统学意义   总被引:3,自引:0,他引:3  
根据槲栎叶复合群研究的最新成果订正了国产槲叶栎属 (Dryophyllum)的化石。通过对该属 9种化石的整理 ,将 Dryophyllum dewalquei、D.parvum、D.relongtanense、D.yunnanensis和 D.sp.等 5种分别归入 Berryophyllum dewalquei、B.parvum、B.relongtanense、B.yunnanensis和 B.sp.;将 D.fushunense归入 Castaneophyllum fushunense;将 D.nervosaum归入 Quercusnervosum;将 D.relongtanense的一部分归入Q.lantenoisii;D.subfalcatum尚不能确定归属 ,但可以肯定不属槲栎叶复合群。同时 ,还讨论了槲栎叶复合群的地史学意义。该复合群是原始壳斗科向现代壳斗科过渡的中间类群 ,壳斗科各现代属出现的时间不早于古新世  相似文献   

6.
国产黄杨科六种植物的考订   总被引:4,自引:0,他引:4  
对国产黄杨科6种植物作了修订或补充:将头花黄杨归入匙叶黄杨,平卧皱叶黄杨、越橘叶黄杨和矮生黄杨归入皱叶黄杨,汕头黄杨归入狭叶黄杨,东方野扇花归入长叶柄野扇花。报道了杨梅黄杨在湖北、江西和福建的新分布,皱叶黄杨在广西和福建的新分布,双蕊野扇花在贵州和广西的新分布。  相似文献   

7.
国产假木贼属植物微形态特征及其生态意义   总被引:1,自引:0,他引:1  
利用体视显微镜对国产假木贼属8种植物的微形态特征进行了观察.结果表明:该属植物的形态可分为两大类:(1)无瘤状茎基,如:高枝假木贼(Anabasis elatior)、短叶假木贼(A.brevifolia)、无叶假木贼(A.aphylla)和盐生假木贼(A.salsa);(2)具瘤状茎基,如:粗糙假木贼(A.pelliotii)、白垩假木贼(A.cretacea)、展枝假木贼(A.truncata)和毛足假木贼(A.eriopoda);再通过叶形态的变化规律,如弧状弯曲,鳞片状或三角钻形等来甄别种的属性.实验证明:假木贼属植物叶的微形态特征具有高度的种间专属性和稳定的遗传性,可以作为假木贼属种分类的重要依据,该类植物由于长期生存在干旱环境下,形成了一系列抵御干旱逆境的典型的超旱生的形态特征,在根、茎和叶3个方面均得以充分体现.因此,研究其形态学和生态学的进化机制,对当前植物抗逆育种、生态环境恢复等都具有重要意义.  相似文献   

8.
张汝玫 《古生物学报》1991,30(1):125-125
前言Desmiophyllum一名系Lesquereux(1878)根据美国石炭纪一种与狭型科达树(Poacordaites)相类似的叶部化石创立的,模式种D. gracile的叶是单个或成组地接触在一保存不完全的轴上,被认为是一个不清楚的种,可能与Cordaites同物异名,因而Desmiophyllum长期未被采用,后来Solm-Laubach将这个属名的含义加以厘定,用于代表中生代叶枝形态不明、单独保存的狭形叶但不能归入已知属的叶部化石。此后,这个属名方被古植物学者广泛采用。从国内外定为Desmiophyllum的各个种的叶角质层构造来看,内容复杂,特征各异。  相似文献   

9.
采用光学显微镜对中国蓼属分叉蓼组(Polygonum section Aconogonon)和冰岛蓼属(Koenigia)的21种植物的叶下表皮微形态进行了观察研究。结果表明,其叶下表皮微形态特征可分为三种类型:(1)气孔器类型为无规则型,表皮细胞多边形,垂周壁为波状;(2)气孔器类型为无规则型兼有非典型不等型,表皮细胞为多边形或不规则形,垂周壁为平直弓形或波状;(3)气孔器类型为不等细胞型,表皮细胞多边形,垂周壁为平直弓形。分叉蓼组(西伯利亚蓼除外)植物的叶表皮气孔器类型具有高度一致性,说明该组是一个自然类群。本文研究结果不支持将大铜钱叶蓼(Polygonum forrestii Diels)、铜钱叶蓼(P. nummularifolium Meissner)划归于冰岛蓼属的处理意见;支持将西伯利亚蓼(P. sibiricum Laxm.)独立成属,即西伯利亚蓼属(Knorringia Tzvel.)的观点;同时也支持仍将多穗蓼(P. polystachyum Wall.ex Meissner)和松林蓼(P. pinetorum Hemsl.)归在分叉蓼组的处理意见。  相似文献   

10.
泡果荠属Hilliella和阴山荠属Yinshania是十字花科中国特有的两小群植物,但是,它们的分属界定却一直颇有争议。本文结合前人的研究结果重新对这两群植物做了研究,从而进一步确认这两群植物应该界定为两个属,即泡果荠属和阴山荠属。文中比较了两属间重要的性状特征,并指出它们的主要区别在于:泡果荠属果实无假隔膜,种子较大,表面具小瘤状突起,染色体倍性为六倍体(2n=6x=42);而阴山荠属果实有假隔膜,种子较小,表面具网纹,染色体倍性为二倍体(2n=2x=12)。两属其他方面如叶形态、叶表皮结构、被毛类型  相似文献   

11.
Two new species of phlebotomine sand fly from Colombian Andes are described, belonging to the subgenus Pifanomyia of the genus Pintomyia. P. (P.) limafalcaoae sp. nov. for which both sexes are described, is assigned to the series pia while P. (P.) antioquiensis sp. nov., known only from the male, is included in the series verrucarum. The subgenus Pifanomyia is characterized and identification keys presented for the two new species.  相似文献   

12.
Several species of the family Petraliellidae were first described from the coast of Queensland, including the type species of Sinupetraliella, S. litoralis. These species are redescribed from type, or topotype specimens, and include Petraliella concinna, which has not been certainly found since its introduction in 1891; lectotype material is designated for P. buski and P. magna. Six other species are described from Queensland, P. crassocirca, P. dentilabris, P. dorsiporosa, Mucropetraliella bennetti, M. serrata and M. tuberosa. The species Mucropetraliella tuberosa is a new addition to the Queensland fauna and is described and illustrated here for the first time since its introduction in 1884. The characters of the family Petraliellidae are briefly discussed and the genera to which the Queensland species are assigned is reviewed. A taxonomic key to the ten Queensland petraliellid species described is also provided.  相似文献   

13.
本文记述赤眼蜂科赤蜂族Trichogrammatini一新属,类断赤眼蜂属PseudomirufeusLou,gen.nov.及其模式种;短索类断赤眼蜂P.curtifuniculusLouetYuan,sp.nov,产地为中国吉林。新属的前翅宽阔、缘脉不与翅的前缘紧密接触,前足股节外缘具一列齿状突,触角梗节具明显的脊纹,以及雄性外生殖器等特征均与断脉赤眼蜂属MirufensGirault相似,但两者雄虫触角棒节的形态明显不同;新属的律节为2节,其上具稀疏的刚毛;而后者的棒节为4节,即除正常的3节外,末端尚具1小节,各节具轮生长刚毛;新属的前翅缘脉与痣脉几乎等长,而后者前翅缘脉明显短于病脉.两者易于区别。模式标本保存于沈阳农业大学昆虫标本室。  相似文献   

14.
Abstract  Pseudomirufens Lou, gen. nov. and P. curtifuniculus Lou et Yuan sp. nov. are described. Pseudomirufens Lou is assigned to the Trichogrammatini and appears closest to Mirufens Gi-rault. Type is kept in Shenyang Agricultural University.  相似文献   

15.
A new Adapiform Primate from the locality of Chambi (Tunisia) is described and assigned toDjebelemur martinezi gen.nov., sp. nov. Holotype CBI 33, fragment of left mandible with P/3-M/3. Other material includes a lower and two upper isolated molars and one probable lower canine. This new material is assigned to the Adapidae.  相似文献   

16.
Seven marine gymnamoebae were isolated from different environments of seawater, slush (pack ice meltwater), and sediment in the Ross Sea area of Antarctica. All amoebae were isolated and maintained at temperatures below 4 degrees C. Growth, rate of locomotion, and general morphology were observed at an environmentally appropriate temperature (1 degrees C) and at room temperature (approximately 25 degrees C). Molecular (srDNA sequences) and microscopical techniques were used to identify the gymnamoebae and establish their phylogenetic affinities. Three isolates (S-131-2, SL-200, and W4-3) were assigned to a psychrophilic subspecies of Neoparamoeba aestuarina, N. aestuarina antarctica n. subsp., one isolate (S-205) was assigned to a new species of Platyamoeba, P. oblongata n. sp., two isolates (W51C#4 & W51C#5) were also assigned to a new species of Platyamoeba, P. contorta n. sp., and one isolate (S-241) was a novel psychrophilic gymnamoeba Vermistella antarctica n. gen. n. sp. Molecular and morphological results revealed that V. antarctica was not related to any described family of gymnamoebae. Strains S-205, W51C#4, and W51C#5 were capable of locomotion at room temperature, while strains SL-200, S-131-2, W4-3, and S-241 exhibited locomotion only below approximately 10 degrees C. Our results imply that the Antarctic environment is host both to cosmopolitan gymnamoebae that have acquired adaptations for existence at low environmental temperature and to apparently novel psychrophilic amoebae described here for the first time.  相似文献   

17.
A method is described for purification of P6, MRP8, and MRP14, three calcium-binding proteins assigned to the S100 protein family. The purification procedure included preparation of human granulocytes, ammonium sulfate precipitation, and anion-exchange chromatography and resulted in the copurification of P6, MRP8, and MRP14. Individual proteins were separated by either preparative isoelectric focusing or preparative SDS–PAGE. The procedure was carried out in the course of 4 days and yielded several milligrams of essentially pure P6, MRP8, and MRP14 in either native or denatured form.  相似文献   

18.
Eighteen genes were assigned to chromosomes in the sacred baboon, Papio hamadryas, by their concordant segregation with the chromosomes in a set of baboon X Chinese hamster somatic cell hybrids. ACY1 was assigned to P. hamadryas chromosome 2 (PHA 2); SOD1 and MDH2 to PHA 3; ME1 and SOD2 to PHA 4; NP, MPI, PKM2, and HEXA to PHA 7; PP to PHA 9; ADA and ITPA to PHA 10; LDHB and TPI1 to PHA 11; MDH1 to PHA 13; ESD to PHA 17; and GPI and PEPD to PHA 20. Regional assignments were possible for ACY1 (PHA 2pter----q1) and MDH2 and SOD1 (PHA 3p). Five other independently segregating markers or syntenic groups (PGD, PGM1; and PEPC; PGM2 and PEPS; IDH1; LDHA and ACP2; and GSR) were also identified. Gene assignments and syntenic groups described in P. hamadryas are compared to those found in P. papio, the rhesus monkey, and man. A possible primate model for human lymphoid disease is discussed.  相似文献   

19.
The genus Parardisia is shown to be synonymous with the large pantropical genus Ardisia . The species on which Parardisia was based, A. involucrata , should therefore retain that original name. The only other species assigned to Parardisia, P. gamblei , is reduced to synonymy with Ardisia moultonii; both were described (and still known only) from Sarawak. The first species retains its position in Ardisia subgenus Tinus , while the latter belongs in subgenus Tinopsis .  相似文献   

20.
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