贵州剑河寒武系第4阶、乌溜阶耙肢虾Occacaris Hou,1999的研究

大型双瓣壳节肢动物耙肢虾Occacaris Hou,1999是仅产于我国云南及贵州的地区性生物属种,主要特征是壳长几毫米到几厘米不等,呈卵圆形。Occacaris共3个种:Occacaris oviformis Hou,1999、Occacaris lazizhaiensis Wen et Peng,2017和Occacaris magnus (Yao,2009)。该3个种在贵州剑河皆有产出。O. oviformis、O. lazizhaiensis和O. magnus的壳体长宽比有明显分异。O. magnus是优势种。贵州Occacaris的发现提供了该属从云南筇竹寺组(寒武纪第3期)东迁进入贵州凯里组(乌溜期)的连续地层产出证据;从杷榔组(陆棚斜坡相区较深水沉积)到凯里组(大陆斜坡沉积)均有发现,充分说明Occacaris适应了更宽的地理和生态环境。凯里组的Occacaris常与腕足类、三叶虫、软舌螺及始海百合等生物共存,为研究其生态及埋藏特征提供了重要材料。     

New discovery on dinosaur fossils from Early Jurassic, Sichuan, China

An early and primitive sauropod dinosaur, Gongxianosaurus shibeiensis (gen. et sp. nov.), from Lower Jurassic Dongyuemiao Member of Ziliujing Formation in Shibei Village, Gongxian County, Sichuan Province, China is described, which is among Gongxian dinosaur fossils discovered in 1997. Except for skull incomplete, fossils were well-preserved. It has concurrently some features of both sauropod and prosauropds. It is an intermediate type of evolution from prosauropod to sauropod, provides practical materials for studying of origin and evolution of sauropod dinosaur fauna, and a favourable way for stratigraphic correlation between Early Jurassic Ziliujing Formation and Lower Lufeng Formation, in the Sichuan Basin and the Central Yunnan Basin that lies to its southwest.     

贵州石蒜属一新种

本文描述了贵州石蒜属的一个新种：贵州石蒜。     

贵州杜鹃花一新种

本文描述了贵州杜鹃花属的一个新种:习水杜鹃。     

Isolation and characterization of a new species of Vibrio-Vibrio olivaceus sp.nov. from diseased flounder （Paralichthys olivaceus temminck et schlegel）

One kind of pathogenic bacteria was isolated from diseased (or dead) flounder (Paralichthys olivaceus L.) which expressed bacterial septicaemia. The phenotyic information of the 10 pure cultures was studied extensively, including morphological characteristics, colony characteristics in different media, physiological and biochemical characteristics, and the mol%G C ratio of the DNA for representative strain. The results showed that the isolates belonged to a new species of Vibrio. In addition, the representative strains have been re-checked by China Center for Type Culture Collection (CCTCC), the results were the same as ours, the examined strains were also regarded as a new species of Vibrio, and designated as Vibrio olivaceus sp.nov. by its isolated fish (Paralichthys olivaceus) based on its biological properties following Rules of International Code of Nomenclature of Bacteria. In the same time, we conducted studies on the serum homology of isolates, pathogenicity of isolates by experimental infection. The results showed that all the isolates were of serologic similarity and the isolates have strong pathogenicity to flounder. Inspection to pure cultures and isolates from liver of moribund fish from infection experiment by fluorescent antibody technique showed the feasibility of fluorescent antibody technique as an auxiliary method of examination.     

河南玉兰属二新种

描述了河南木兰科Magnoliaceae玉兰属Yulania Spach的两个新品种,即:莓蕊玉兰(Yulania fragar-igynandria T.B.Zhao Z.X.Chen et H.T.Dai,sp.Nov)和大别玉兰Y.dabieshanensis T.B.Zhao Z.X.Chenet H.T.Dai,sp.nov.ined.莓蕊玉兰叶倒卵圆状椭圆形,背面灰绿色,基部心形、圆形,稀楔形.玉蕾顶生,或腋生,大,陀螺状,或卵球状(基部短柱状,长8～12 mm),长2.0～3.0 cm,径2.0～2.5 cm;芽鳞状托叶花前脱落.单花具花被片9～18枚,花瓣状,花被片外面中部以下中间亮紫红色;有时具1～3枚肉质、披针形、亮紫红色花被片.雌雄蕊群大,草莓状,径1.8～2.3 cm,有时具2～5枚雌蕊群而特殊.大别玉兰叶椭圆形及菱萼状—卵圆形.有4种花型.     

中国食虫虻一新种及二种国内新记录(双翅目:食虫虻科)

在整理中山大学昆虫研究所保存的食虫虻标本时,发现克虫虻属Clephydroneura Becker,1925一新种及一中国新记录和钉突虫虻属Euscelidia Westwood,1849一中国新记录,现报道如下.模式标本保存于中山大学昆虫学研究所标本室. 海南克虫虻 Clephydroneura hainanensis新种(图1) 雄虫体长18毫米,翅长13毫米.     

黔北桐梓奥陶系五峰组黑色页岩的笔石定向性

黔北桐梓奥陶系五峰组黑色页岩中产有丰富的笔石,对这些笔石和其碎片的长轴在水平投影方向进行测量,结果表明笔石具有定向排列的特征。同时,从黑色页岩段Dicellograptus com-plexus带至观音桥段Normalograptus extraordinarius-Normalograptus ojsuensis带笔石的排列方向呈现由NE-SW至N-S再至NW-SE的逐渐变化,且其定向排列的方向性逐渐明显。五峰组黑色页岩中笔石定向性排列的特征可以解释为其沉积环境中存在一定的水动力条件,而剖面纵向上笔石定向性的变化可能与奥陶纪末期加里东运动导致滇黔桂古陆海岸线的变化有关。