西南地区中泥盆世的直立轮藻

本文描述了中泥盆世的直立轮藻5种、1型,分别属于Sycidium 和Chovanella 两属。文中讨论了这两个属的分类位置问题,详细阐述了Sycidium 藏卵器的发育特点,提出了关于藏卵器包围细胞分裂发育过程的新认识,同时提出了含化石地层的时代应相当于中泥盆世晚期的吉维特期。     

西班牙加泰罗尼亚CERDANYA地区晚中新世轮藻植物LYCHNOTHAMNUS BARBATUS的分类学与古生态学意义

轮藻纲植物Lychnothamnus barbatus的化石在西班牙加泰罗尼亚地区比利牛斯山脉东部Cerdanya盆地上中新统(Turolian阶)发现。通过与现生L．barbatus的比较研究,发现两者在藏卵器大小方面存在较大差别,据此建立新亚种Lychnothamnus barbatus ssp．megalicarpus subsp．nov．,其藏卵器的各项特征均与器官属Rhabdochara(Madler)Grambast一致,证实两者为同物异名。Lychnothamnus barbatus在盆地上部湖相沉积层中的大量存在,表明湖盆演化史后期发生过营养状况由富营养化向贫营养化转变的现象。     

Chara zeylanica Wildenow（现生轮藻）藏卵器几个特征的统计分析

本文对采自广西涠洲岛的现生轮藻Ｃｈａｒａ ｚｅｙｌａｎｉｃａ藏卵器的几个特征作了统计分析,结果表明,藏卵器的最大长度,最大宽度和螺旋环数等性状的变异有一定范围,服从统计规律,单变量的变化呈正态分布,具一明显峰值;ＬＰＡ是ＬＥＤ的线性函数,呈正相关。藏卵器乌黑细胞的钙化程度与成熟度有关。未成熟藏卵器的顶部构造为典型的轮藻型,成熟藏卵的顶部构造与有盖轮藻型接近。因此认为,Ｃｒａｍｂａｓｔｉｃｈａｒａ     

河南南部早白垩世轮藻植物群及其地层意义

本文研究的材料是河南省首次发现的一个早白垩世轮藻植物群,它产自河南省确山县留庄公社西谭楼村井下地层和七棵树地面露头中,其构造位置属华北地台南缘任店盆地及其周缘。 留庄一带中生代晚期地层见于任2、任3等钻井。但仅于任2井见丰富的淡水生物     

西藏台错晚第四纪轮藻类的新类型

本文的研究材料来自西藏羌塘高原西部台错古湖一个3.69 m的天然剖面,其地层测年为32.6-4.5ka.从其156个样品中获取大量的轮藻类、介形类和腹足类及少量有孔虫等微体化石.据轮藻类藏卵器外形,顶部结构、螺旋细胞钙化式样等特征,该剖面的轮藻类应归属于轮藻科Characeae之轮藻属Chara.经研究得知,台错古湖在...     

轮藻—观察原生质和精子运动的好材料

在具真核的淡水藻类中,轮藻属(Chara)是一种结构复杂、进化水平较高的类群,它们在植物系统学教学和科研中是不可缺少的典型材料。笔者在教学实践中发现,轮藻也是观察植物活细胞原生质流动及游动精子的最佳材料。由于轮藻在室内栽     

塔里木盆地井下石炭纪轮藻植物群兼论古生代轮藻的分类

石炭纪轮藻化石比较罕见,本文论述了塔里木盆地井下大量的石炭纪输藻化石,同时发现了南,北两个不同的轮藻植物群,这些资料对其演化,分类的研究具有重要意义。     

中国轮藻植物分布研究

轮藻植物是低等的藻类植物,但其个体较大、高度分化,生殖器官构造复杂,可与高等植物的性器官比较,因此将它们列为独立一门即轮藻门(Charophyta),轮藻门只有一个轮藻科(Characeae)。轮藻植物分布于除南极洲以外的所有大陆,多生于淡水,少数生长在微盐性的水体中,轮藻植物分布与环     

古生代轮藻类的演化和分类

本文通过对古生代轮藻类群形态结构的比较研究,认为Ｔｒｏｃｈｉｌｉｓｃｕｓ和Ｍｏｅｌｌｅｒｉｎａ具有不同的起源。前者藏卵器包围细胞右旋具横脊,底部结构两侧对称,起源于Ｓｙｃｉｄｉｕｍ;后者的左旋轮藻类包围细胞简单,底部结构辐射对称源于具简单直立包围细胞的Ｘｉｎｊｉａｎｇｏｃｈａｒａ。根据底部结构的对称性,将轮藻门划分为Ｓｙｃｉｄｉｐｈｙｃｅａｅ和Ｃｈａｒｏｐｈｙｃｄｅａｅ两个纲,Ｓｙｃｉｄｉｐｈｙｃ     

布氏轮藻(Chara braunii)生殖器官环境扫描电镜的观察

本文采用环境扫描电镜和光学显微镜,对布氏轮藻(Chara braunii)的藏卵器和藏精器进行了仔细观察。结果表明：藏卵器外的管细胞(包围细胞或螺旋细胞)在卵细胞受精以后,不但没有钙的沉淀、加厚,而且还呈现出逐渐萎缩,最终消失。因此,在古轮藻的研究上,常提到的包围细胞或螺旋细胞,实际上并非是细胞结构,而是受精卵的外壁。     

我国热带真菌两新种

报道了云南思茅莱阳河自然保护区所发现的高等真菌两新种：思茅虫草（Cordyceps szemaoensis Zang) (麦角菌科Clavicipitaceae)和巨孢斜盖伞（Clitopilus gigantosporus Zang)（红褶菇科Entolomataceae)模式存中国科学院昆明植物研究所,隐花植物标本馆（HKAS）。     

The genus Batozonellus from China with description of a new species (Hymenoptera: Pompilidae)

The genus Batozonellus(Pompilidae: Pompilinae) from China is reviewed. A new species, B. flavithoracicus Li Li, sp. nov. from Yunnan, China, is described and illustrated. A key to the Chinese species of Batozonellus, modified from Tsuneki(1989), is provided.     

台湾窗翅叶蝉属种类纪要(半翅目,叶蝉科,大叶蝉亚科)

记述台湾的窗翅叶蝉属Mileewa Distant 11种,其中包括3新种:褐条窗翅叶蝉M.fusciovittata sp.nov.,南投窗翅叶蝉M.nantouensis sp.nov.和尖头窗翅叶蝉M.sharpa sp.nov.,并确认双斑窗翅叶蝉M.bimaculata Cai et He是船茎窗翅叶蝉M.ponta Yang et Li的新异名.文中详细描述了新种的形态特征并绘制了雄性外生殖器构造图,提供了11种的整体图片和分布,编制了分种检索表.研究标本分别保存在贵州大学昆虫研究所(GUGC)、台湾国立自然科学博物馆(NMNS)、台湾农业试验所(TARI)和台湾国立中兴大学(NCHU).     

中国蠊泥蜂属一新种记述(膜翅目:蠊泥蜂科)

记述采自云南的蠊泥蜂科Ampulicidae蠊泥蜂属Ampulex l新种;扁唇蠊泥蜂Ampulex clypecomplana Chen et Li,sp.nov.,并与近似种Ampulex dissector(Thunberg,1822)作了比较。模式标本保存在云南农业大学昆虫标本室。     

Hsüa robusta,a new land plant from the Lower Devonian of Yunnan,China

A new psilophytic plant, Hsüa robusta, is found in the Xujiachong Formation (Emsian) of the Lower Devonian from the Qüjing (= Kütsing) district of Yunnan, China. This plant is tentatively referred to the Cooksoniaceae of Rhyniales. Hsüa gen. nov. Type species: Hsüa robusta (Li et Cai) C. S. Li. Diagnosis: Plants erect and then creeping. Main axes dividing pseudomonopodially and bearing dichotomous lateral branches which somewhat differentiate into vegeta, tire and fertile ones, with dichotomous root-like and rhizophore-like appendages. Sporangia terminal, round to reniform or wide reniform, dehiscing along distal margin into two equal halves. Spores homosporous, trilete. Stomata anomocytic. Protostele centrarch. Hsüia robusta (Li et Cai) C. S. Li, comb. nov. Cooksonia zhanyiensis Li et Cai, Acta Geologica Sinica, 52 (1) 1978, p. 10, pl. II, fig. 6.——Taeniocrada robusta Li et Cai,ib. p. 10, pl. II, fig. 7—14. Diagnosis: Characters same as in generic diagnosis. Main axes 6—10 mm wide and at least 24 cm long, with vascular strands 1.2—2.4 mm acr oss. Fertile branches 3—4 times equally or unequally dichotomous, 10—1.5 mm in width and up to 11 cm in length, possessing a vascular bundle of 0.5 mm in its greatest diameter. Branches circinately coiled in apical regions. Axial tubercles, root-like and rhizophore— like appendages arising from the main axes usually anterior to the lateral branches. Axial tubercle round with a diameter of 2.2—2.4 mm, having a vascular bundle about l mm across. Rootlike branches 3 times bifurcate, 1—0.3 mm wide and up to 1.5 cm long, with a vascular bundle about 0.1 mm across. Rhizophore-like appendages forked, 3—1.7 mm in width, possessing a vascular bundle of 0.7 mm in its greatest diameter. Root-like protuberances sometimes arising from rhilzophore-like branches. Epidermal cells of axes generally elongate, measuring 60—290μby 25—60 μ. Stomata mainly fusiform, 90—110 μ long and 50—60μ wide, consisting of a pair of guard cells enclosing a pore 6—15μ in length and 1—3μ in width. Cuticle of guard cells quite thick. Stomatal density about 5 per mm². Sporangia 0.8—4.2 mm high, 1.0—8.2 mm across, usually having a dehiscent distal border which measures 50—100μ broad. Demarcation between sporangium and its stalk quite clear. Epidermal cells of basal part of sporangial walls elongate, about 100 μ long and 30μ wide, but those of distal part isodiametrally polygonal, about 50μ in diameter. Stomata, radially arranged scattering over sporangial walls, generally round about 50μ in diameter and 50 per sporangium. Spores round, 18—36μ (average 27μ) indiameter, and smooth. Tracheids of protoxylem about 10μ across; those of metaxylem about 30μ across, with scalariform thickening. This plant is similar to Renalia hueberi Gensel in general morphology, but differs from the latter in possessing root-like and rhizophore-like branches. The generic name is derived from Prof. Hsü Jen. This paper is a thesis for M. Sc.     

A taxonomic study on the leafhopper genus Scaphoidella vilbaste (Hemiptera: Cicadellidae: Deltocephalinae) from China

All six species of the leafhopper genus Scaphoidella Vilbaste from China are reviewed. Among them, two new species, S. undosa sp. nov. and S. acaudata sp. nov., are described; two new combinations, Scaphoide. unihamata (Li et Kuoh) comb. nov. and Scaphoidella wideaedeaga (Wang et Li) comb. nov. are proposed; and two new synonyms are revealed, Scaphoideus inermis Cai et He (2001) syn. nov. as a junior synonym of Scaphoidella unihamata (Li et Kuoh 1993) and Scaphoideus multipunctus Li et Dai (2004) syn. nov. as a junior synonym of Scaphoidella stenopaea Anufriev (1977). A key is given to separate all six Chinese species, and illustrations of genitalia are provided.     

海南瘤胸属一新种(竹节虫目:异科)

本文报道采自海南省界科瘤胸属Ｔｒａｃｈｙｔｈｏｒａｘ　Ｒｅｄｔｅｎｂａｃｈｅｒ一新种,褐脊瘤胸Ｔｒａｃｈｙｔｈｏｒａｘ　ｆｕｓｃｏｃａｒｉｎａｔｕｓ　ｓｐ．ｎｏｖ．。对新种作了描述,附有特征图,并与近似种作了比较。     

Three new species of Potamothrix (Oligochaeta, Naididae, Tubificinae) from Fuxian Lake, the deepest lake of Yunnan Province, Southwest China

Three new species of Potamothrix Vejdovsky & Mrázek, 1902 (Oligochaeta: Tubificinae), Potamothrix praeprostatussp. n., Potamothrix paramoldaviensissp. n. and Potamothrix parabedotisp. n., are reported from Fuxian Lake of Yunnan Province, Southwest China. Potamothrix praeprostatusdiffers from its allies by its prostate glands joining atria in its proximal to middle portion, and spermathecal chaetae. Potamothrix paramoldaviensis is distinguishable from its allies by having penial chaeta but no penes, and differs from Potamothrix moldaviensisby its homogenous atrium. Potamothrix parabedoti is distinctive in the position of its reproductive organs, and differs from Potamothrix bedoti by its homogenous atrium. Hitherto, 34 freshwater oligochaete species have been recorded in Yunnan Province, including nine endemic species from the plateau lakes.     

江苏泰县五通组观山段胞石Grahnichitina pilosa的发现及其意义

根据江苏泰县Ｎ－４井五通组观山段顶部的胞石Ｇｒａｈｎｉｃｈｉｔｉｎａ ｐｉｌｏｓａ的发现,确定观山段的时代为中泥盆世吉维特期。据此认为：擂鼓台段的两层暗色泥岩,应分别对比为南洞页岩、长顺页岩;中泥盆世大海侵时,华南海沿苏皖河经皖南、苏南入侵苏北。对Ｇｒａｈｎｉｃｈｉｔｉｎａ ｐｉｌｏｓａ进行描记和讨论。