Thermonectus tremouillesi sp. nov. (Coleoptera: Dytiscidae: Aciliini): description of the adults and larvae and comparisons with other species of the genus

A new species of Aciliini diving beetles, Thermonectus tremouillesi sp. nov., is described on the basis of adult and larval specimens collected in shaded forest ponds in Argentina. The adults are compared with morphologically close species and diagnosed by the following combination of characters: the colour pattern on pronotum and elytra; the sexual sculpture of the female well marked, covering basal fourth to basal half of elytra; the male protibia narrow with dorsal margin slightly prominent; the tergite IX of male with four posterior projections; the median lobe of aedeagus bifid apically; and the parameres bearing a terminal spur. The larvae, for their part, are compared with those of other species of the genus and diagnosed by the colour pattern of the cephalic capsule, the shape of the nasale, the spinulae on the prementum, and several chaetotaxic features. Both adults and larvae are illustrated in detail combining scanning electron microscope images, digital photos and line drawings of selected structures. The habitat of the new species and its associated fauna are briefly described.     

The most important lacewing species in Indian agricultural crops,Chrysoperla sillemi (Esben-Petersen), is a subspecies of Chrysoperla zastrowi (Esben-Petersen) (Neuroptera: Chrysopidae)

The existence is reported of rhizoids in specimens of Bowerbankia pustulosa and Bowerbankia citrina collected from different Iberian locations. The structure of these rhizoids differs from that of other fixation structures previously reported in Bowerbankia and redescribed here. Rhizoids in both species are probably homologous with those of Amathia, supporting the close relationship between these two genera.     

Larval development of the coronuloid barnacles Austrobalanus imperator (Darwin), Tetraclitella purpurascens (Wood) and Tesseropora rosea (Krauss) (Cirripedia,Tetraclitidae)

The presence of embryos in the mantle cavity of A. imperator, T. purpurascens and T. rosea was monitored over two years. Tesseropora rosea showed a clearly defined breeding season in summer and early autumn. Seasonal breeding in A. imperator and T. purpurascens was less well defined, a small number of gravid individuals being present during most of the year. Breeding increased during the late autumn and early winter in A. imperator and during winter, spring and early summer in T. purpurascens. The larval stages of A. imperator, T. purpurascens and T. rosea are described from larvae reared in the laboratory. Separation of the larval stages between these species depends on fine morphological detail. Distinctive larval features permit the separation of coronuloid larvae from those of the other balanomorph superfamilies, but coronuloid nauplii resemble balanoid nauplii more than chthamaloid nauplii.     

高温胁迫对近江牡蛎Hsp90表达及CpG甲基化的影响

为了丰富广温性潮间带底栖生物的温度调控机制研究,本研究采用荧光定量PCR法、亚硫酸氢盐处理基因组DNA结合甲基化特异性PCR(Methylation specific PCR,MSP)法及染色质免疫共沉淀法,对40℃热胁迫24h后,近江牡蛎(Crassostrea rivularis)热休克蛋白90(Heat shock protein 90,Hsp90)的mRNA表达及其核心启动子甲基化的调控模式进行研究。结果显示:近江牡蛎成贝在40℃热胁迫24h后,其消化腺、腮和心脏组织中Hsp90mRNA表达显著升高(P0.05),核心启动子区CpG平均甲基化水平显著降低(P0.05),其中邻近热休克元件(Heat shock element,HSE)的CpG2、CpG3、CpG4位点甲基化水平显著降低(P0.05),CpG5位点甲基化水平无显著变化(P0.05),灰度分析显示消化腺和心脏组织中的Hsp90核心启动子与RNA聚合酶Ⅱ(RNA polymeraseⅡ)结合增强,腮组织中的Hsp90核心启动子与RNA polymeraseⅡ出现弱结合。表明Hsp90是近江牡蛎抵御高温胁迫的主要表达基因。     

长沙地区豇豆荚螟的生物学特性及消长规律研究

通过室内饲养和田间调查,研究了豇豆荚螟（Maruca testulalis Geyer）幼虫的生物学特性.结果表明：在长沙地区豇豆荚螟一年发生6-7代,幼虫共5龄.1-5龄幼虫头壳宽度分别为0.197±0.001 mm、0.325±0.009 mm、0.536±0.003 mm、0.889±0.006 mm、1.471±0.004 mm,相邻头壳宽度比值约为1.64.在18℃时,1-5龄幼虫的历期分别是3.1±0.81 d、3.0±0.8 d、2.5±0.6 d、3.7±0.9 d和5.7±1.5 d;在32℃时,1-5龄幼虫的历期分别为1.7±0.7 d、1.1±0.3 d、1.2±0.5 d、1.2±0.5 d、1.3±0.6 d.幼虫期的发育起点温度是9.857℃;有效积温为187.2℃,幼虫在花、荚上的危害盛期为5月22日-6月11日、8月19日-9月8日.     

亚硝酸盐、硫化物与氨对河蟹幼体的急性毒性实验

本文研究了亚硝酸盐、硫化物与氨对河触幼体的24h,48h,96h的半致死浓度LC50值和安全浓度。     

长白山寡角摇蚊亚科幼虫研究(双翅目:摇蚊科)

以检索表形式记述了长白山摇蚊科寡角摇蚊亚科（Ｄｉａｍ ｅｓｉｎａｅ）幼虫,共３ 属,７ 种,其中东方帕摇蚊Ｐａｇａｓｔｉａ ｏｒｉｅｎｔａｌｉｓ（Ｔｓｈｅｒｎｏｖｓｋｉｊ）,高山寡角摇蚊Ｄｉａｍ ｅｓａ ａｌｐｉｎａ Ｔｏｋｕｎａｇｅ,津氏寡角摇蚊Ｄｉａｍ ｅｓａ ｔｓｕｔｓｕｉ Ｔｏｋｕｎａｇａ,罕见寡角摇蚊Ａ Ｄｉａｍ ｅｓａ ｇｒ． ｉｎｓｉｇｎｉｐｅｓ ＫｉｅｆｆｅｒＮｏ．Ａ,泽尼寡角摇蚊Ｄｉａｍ ｅｓａ ＺｅｒｎｙｉＥｄｗ ａｒｄｓ ５ 种为中国新记录种     

Anisakis simplex complex (Nematoda: Anisakidae) in zooplankton communities from temperate NE Atlantic waters

The euphausiid Nyctiphanes couchii and an unidentified mysid have been found, for the first time, with third-stage larvae (L₃) of the Anisakis simplex complex in the mesozooplanktonic community of the coastal upwelling system in Galicia (NW Spain). Parasite larvae were molecularly identified using the internal transcribed spacer (ITS) region. The prevalence of these parasites in the euphausiid population was 0.0019%. The existence of parasites in a variety of mesozooplankton organisms suggests that the transmission routes of A. simplex sensu stricto and A. pegrefii are wider than expected. The results suggest that these two Anisakis species are not specific to their intermediate hosts. Finally, the recruitment of A. simplex complex may be affected by oceanography, differing under upwelling or downwelling conditions.     

球形芽孢杆菌BS—1012产毒部位的研究

本文对球形芽孢杆菌 Bacillus Sphaericus BS—1012菌株的产毒部位进行了研究。结果表明:BS—1012菌株的伴孢晶体和芽孢对蚊幼虫具较高的毒力。营养体对蚊幼虫也有毒力,毒力强度低于芽孢和伴孢晶体。本文发现营养体在裂殖生长过程中能够产生并分泌到胞外的外毒素,这对于大规模生产时选用合适的剂型具有理论指导意义。     

II.—Bermudian species of Donatia (Tethya)

Summary

Acanthochondrites inflatus (Bainbridge, 1909), parasitic on the branchial cavity wall of Raja radiata is redescribed and a comparison of its morphological features is made with the only other species of the genus, A. annulatus (Olsson, 1869.)