New genera and species of the family Dipteromantispidae (Insecta: Neuroptera) from the Cretaceous amber of Myanmar and New Jersey

Three new genera and two new species, namely Burmodipteromantispa jiaxiaoae gen. et sp. nov., Mantispidipterella longissima gen. et sp. nov., and Jersimantispa gen. nov., respectively from the Cretaceous amber of Myanmar and New Jersey, are herein described in the lacewing family Dipteromantispidae, which is an enigmatic group by the mantispid-like appearance combined with strongly reduced, haltere-like hind wings. The male genitalia of Dipteromantispidae is described for the first time and provides new insight for understanding the familial phylogenetic position. A key to the dipteromantispid genera is also given.     

New caddisflies species (Insecta: Trichoptera) from the Cretaceous Taymyr amber

Four new Trichoptera species: Kliganigadukia taymyrensis gen. et sp. nov. (Hydrobiosidae), Archaeopolycentra yantardakh sp. nov. (Polycentropodidae), Taymyrodipseudon protopegasus gen. et sp. nov. (Dipseudopsidae), and Siberoclea parapolaria gen. et sp. nov. (Leptoceridae) from Late Cretaceous amber (Santonian, Kheta Formation, 85 Ma) of Taymyr (Siberia, Russian Federation) are described and illustrated. Data on the Cretaceous amber Trichoptera (13 families, 20 genera, 29 species) are summarized and discussed.     

The first moth lacewing (Insecta: Neuroptera: Ithonidae) from the mid-Cretaceous amber of Myanmar

The lacewing family Ithonidae is reported from the mid-Cretaceous amber of Myanmar for the first time. A new genus and species, Burmithone pennyi gen. et sp. nov., is herein described based on an almost completely preserved female specimen. The new genus exhibits a number of remarkable forewing characters, such as the proximal branches of RP vein fused with the MA vein and the peculiar configuration of MP and CuA. The systematic position of Burmithone gen. nov. is briefly discussed in comparison with other genera of Ithonidae.     

Qitianniu zhihaoi gen. et sp. nov.: The first cerambycid beetle found in Cretaceous Burmese amber (Coleoptera: Chrysomeloidea)

A new cerambycid beetle (Qitianniu zhihaoi gen. et. sp. nov.) is described on the basis of a single specimen embedded in Cretaceous Burmese amber (ca. 99 Ma). Unusual characteristics are hairy antennae and large lateral eyes, a pronotum with lateral margin, and sinuate protibiae. Based on a phylogenetic analysis, the systematic position of Qitianniu is still uncertain and we provisionally place it as Cerambycidae incertae sedis.     

植被发育斜坡土体大孔隙三维重构模型渗流场的LBM数值模拟

以云南昭通头寨植被发育斜坡土体为研究对象,结合CT扫描试验与数字图像处理技术实现了其三维大孔隙空间结构模型的重构。然后基于格子Boltzmann方法（LBM）的D3Q19模型,将固体土骨架视为渗流场边界,并设置反弹格式的边界条件模拟土骨架与水分间的相互作用,从细观角度研究了水在植被发育斜坡土体大孔隙中的渗流特性。研究结果表明：土体渗流过程中,在大孔隙纵向连通的通道内形成了优先流,且通道中的流速远超其他部位;而在封闭或者连通性差的大孔隙中导水率极小,流速几乎为0。土体中大孔隙通道内的流速由孔壁至通道中心逐渐增大,且流速与至通道中心的距离近似呈二次抛物线的分布特征。沿深度方向土体切片大孔隙率大的截面平均渗流流速Uz也较大,从整体变化趋势来看,截面大孔隙率与平均渗流流速有相似的变化规律,这充分说明植被发育斜坡土体内的大孔隙分布对土壤沿深度方向的渗流特性有重要影响。     

一种特殊的实时图象处理—图环图象展开

作者在文中给出了一种将圆环域图象展开成矩形图象的方法，这种方法主要采用八分之一圆扫描方法，快速找出某个圆的所有象素，然后通过双线性插值或抽值将其变为展开图中对应的象素。     

河南西峡琥珀的矿物学研究

河南西峡琥珀产于白垩系上段(K_2~3)砂砾岩中。通过元素分析、半工业分析、等离子体发射光谱、色谱、红外光谱、紫外光谱、X射线衍射、偏光显微镜、电子显微镜等测试手段,确定了各色琥珀的化学通式为C_(2n)H_(3n)O(5相似文献   

The first fossil Compsocidae from Cretaceous Burmese amber (Insecta, Psocoptera, Troctomorpha)

The first fossil record of the Compsocidae, Burmacompsocus perreaui gen. et sp. nov., is described from Late Albian Burmese amber. Its strong similarity to the two extant compsocid genera suggests a remarkable morphological stability within this group of 100 Ma. This family, now known only in Central America, was certainly more widespread in the past.     

Fischökologische Leitbilder fünf ausgewählter Salzkammergutseen

Ecological base line states for fish communities are necessary for the evaluation of ecological integrity. In Austria the fish communities of all the larger lakes are strongly influenced by human activities, like commercial fisheries, fish stocking, eutrophication or shore line degradation, and therefore these baseline states can not be developed by comparison with a natural, undisturbed lake. We developed ecological baseline states for the fish communities of the lakes Hallstättersee, Traunsee, Mondsee, Irrsee and Wallersee by reconstructing the native fish communities of these lakes from historical documents (from between 1500 to 1940). Then we classified the potential fish species of these lakes according to their ecological requirements. Finally we developed the base line states with 16 different ecological factors similar to the factors used for the ecological integrity assessment procedure for streams.

The process of reconstructing the fish communities and some advantages and disadvantages of the base line states for fish communities are discussed.     

塔克拉玛干沙漠腹地1961-1998年逐月平均气温序列的重建

 利用塔里木盆地周边27个气象站1961-2006年逐月平均气温和塔中气象站1999-2006年逐月平均气温资料,同时选取1961-2006年NCEP/NCAR 2.5°×2.5°经纬度距地表2 m的月平均气温再分析格点资料,分别用逐步回归分析、EOF分解和NCEP资料3种方法对塔中气象站1961-1998年历年逐月平均气温序列进行了恢复与重建,分析了误差,并与周边气象站的变化特征进行对比。结果表明,逐步回归和EOF法都能够作为重建塔中逐月平均气温的方法,但相对而言,逐步回归法重建的序列误差更小,平均拟合绝对误差为0.3℃,最大绝对误差为1.9℃。而NCEP/NCAR资料由于冬季存在明显的系统性误差,数值显著偏高,不能用于塔中气温序列的重建。