褐小卷蛾属分类研究及一新种记述(鳞翅目:卷蛾科:新小卷蛾亚科)

This paper deals with two species of the genus Antichlidas Meyrick. Antichlidas trigonia sp. nov. is described as new to science. The adult photograph and the genital structures of the new species are provided. A key to the described species is given.     

中国小卷蛾族五新种记述：鳞翅目：卷蛾科

作者系统研究了中国小卷蛾族标本,发现了五个新种：（１）曲茎小食心虫ＧｒａｐｈｏｌｉｔａｃｕｒｖｉｐｈａｌａＬｉｕｅｔＹａｎ,因其雄性外生殖器阳茎长而端部弯曲命名,分布在四川峨眉山;（２）顶平小食心虫Ｇ．ｇｌｏｂｅｌａＬｉｕｅｔＹａｎ,因其雄性外生殖器的抱器顶端平截而命名,分布在吉林长白山;（３）手指小食心虫Ｇ．ｄａｃｔｙｌａＬｉｕｅｔＹａｎ,因其雄性外生殖器的抱器腹有手指状突起而命名,分布在广东广州植物园;（４）球小食心虫Ｇ．ｇｌｏｂｏｖａｌｖａＬｉｕｅｔＹａｎ,因其雄性外生殖器的抱器端呈圆球形而命名;分布在山东泰山;（５）弯瓣小卷蛾Ｃｙ－ｄｉａｃｕｒｖｉｖａｌｖａＬｉｕｅｔＹａｎ,因其雄性外生殖器的抱器瓣从中部开始强烈向上弯曲而命名,分布在浙江,江西。新种的所有模式标本保存在中国科学院动物研究所。     

中国圆点小卷蛾属研究及一新种记述(鳞翅目,卷蛾科,小卷蛾亚科)(英文)

记述了我国圆点小卷蛾属EudemisHbner的种类,共4种,其中包括1新种:郑氏圆点小卷蛾E.zhengi sp.nov.。提供了分种检索表、新种的形态特征图和生殖器图。模式标本保存在南开大学昆虫标本室。郑氏圆点小卷蛾,新种Eudemis zhengi sp.nov.(图1~2)新种与杨梅圆点小卷蛾E.gyrotis(Meyrick)相似,但可通过下列特征区别:雄性外生殖器之颚形突中部的突起宽短,同时侧缘还具尖角状突起并被细齿,抱器瓣仅在抱器腹近基部具1簇刺丛;后者颚形突中部的突起长指状,侧缘无突起,抱器瓣腹缘具3簇刺丛,分别位于抱器腹基部和端部及抱器端基部2/5处。正模♂,云南勐腊补蚌(21°29′N,101°33′E;海拔650m),25Aug.2005,任应党采;玻片号YHL05159。词源:新种种名以郑哲民教授的姓氏命名,以示对郑先生在我国昆虫系统学研究领域做出显著贡献的敬意。     

中国新记录属——带小卷蛾属分类研究（鳞翅目：卷蛾科）

本研究首次发现带小卷蛾属Metacosma在我国分布,记述了采自安徽、湖南和贵州的2新种：三角带小卷蛾Metacosma triangulata,sp．nov．和梯形带小卷蛾Metacosma trapezia,sp．nov．。文中给出了新种的成虫及雄性外生殖器照片,编制了本属分种检索表。研究标本保存在南歼大学生命科学学院昆虫标本室。 1．三角带小卷蛾Metacosma triangulata,新种（图1,3） 翅展10．0mm。 正模：♂,安徽岳两（30．52°N,116．22°E）温泉,1995-Ⅷ-05,胡祥富采,玻片号ZAH04002。 本种与M.impolitana Kuznetsov相似,区别是：本种雄性外生殖器爪形突大,三角形,抱器端对称;而Mimpolitana Kuznetsov爪形突小,乳突状,抱器端不对称（左侧具5根粗刺,右侧6根）。 2．梯形带小卷蛾Metacosma trapezia,新种（图2,4） 翅展11．0mm。 正模：♂,湖南石门（27．34°N,110．01°E）壶瓶山南坪,504m,2002-Ⅴ-04,于海丽采,玻片号YHL0246。副模：1♂,贵州省道真县仙女洞,600m,2004-Ⅷ-17,肖云丽采;1♂,贵州江口黑湾,600m,2001-Ⅶ-27,李后魂,王新谱采。 本种与Mimpolitana Kuznetsov相似,区别是：本种爪形突梯形,抱器端对称;而坛impolitana Kuznetsov爪形突小,乳突状,抱器端不对称（左侧具5根粗刺,右侧6根）。本种与三角带小卷蛾Metacosma triangulata,sp．nov．的区别主要在爪形突形状上,本种爪形突为梯形,后者为三角形。     

棉褐带卷蛾Adoxophyes orana可分为两个亚种(鳞翅目: 卷蛾总科: 卷蛾科)

对我国不同地区和不同植物上所采集的棉褐带卷蛾３个属群进行形态分类研究,发现茶叶、棉花上的２个属群幼虫上颚第５齿、蛹下唇基毛、雄虫前翅基斑、中带、雄性爪型突和雌性囊导管长度等与苹果、桃树上的属群均存在较大差异。结合性信息素、杂交等研究,认为我国的棉褐带卷蛾已发生了种下分化,应分为两个亚种,即为害苹果、桃树的种为苹褐带卷蛾ＡｄｏｘｏｐｈｙｅｓｏｒａｎａｂｅｉｊｉｎｇｅｎｓｉｓＺｈｏｕｅｔＦｕ,而在棉花、茶树上为害的种是棉褐带卷蛾ＡｄｏｘｏｐｈｙｅｓｏｒａｎａｏｒａｎａＦｉｓｃｈｅｒｖｏｎＲｏｓｌｅｒｓｔａｍｍ。     

中国尖顶小卷蛾属系统学研究(鳞翅目,卷蛾科,新小卷蛾亚科)

尖顶小卷蛾属Kennelia全世界已知2种,中国均有分布.本文记录3种,包括1新种:凹尖顶小卷蛾K.apiconcava sp.nov..文中给出了尖顶小卷蛾属的分种检索表,提供了成虫图和外生殖器特征图.研究标本及模式标本均保存在南开大学生命科学学院昆虫标本室.新种与鼠李尖顶小卷蛾K.xylinana(Kennel)在雄性外生殖器上相似,两者的主要区别是:前者较后者个体小;爪形突末端凹陷呈"M"状,不膨大;尾突端部尖锐;抱器瓣颈部很细,约为抱器端宽的1/4;抱器端近圆形.鼠李尖顶小卷蛾K.xylinana(Kennel)个体较大;爪形突端部膨大,末端平截;尾突端部钝圆;抱器瓣颈部粗,约为抱器端宽的1/2;抱器端斜卵圆形.     

褐卷蛾属二新种：鳞翅目：卷蛾科

褐卷蛾属Ｐａｎｄｅｍｉｓ中国已记录１８种,本文又记述２新种：条褐卷蛾Ｐａｎｄｅｍｉｓ ｓｔｒｉａｔａ ｓｐ．ｎｏｖ．及淡褐卷蛾ｐａｎｄｅｍｉｓ ｆｕｌｖａｓｔｒａ ｓｐ．ｎｏｖ．,至此我国已有２０种。     

中国绿小卷蛾属Eucoenogenes分类研究(鳞翅目:卷蛾科:新小卷蛾亚科)

本文报道了中国绿小卷蛾属6种,包括2新种和1新记录种：长绿小卷蛾Eucoenogenes elongata,sp．nov．,武夷绿小卷蛾Eucoenogenes wuyiensis,sp．nov．和叉绿小卷蛾Eucoenogenes cyanopsis(Meyrick)。文中给出中国已知6个种的检索表。模式标本保存在南开大学生物系。1．长绿小卷蛾Eucoenogenes elongata,新种(图1～2)翅展13．5mm。正模：♂,云南巍山县巍宝山,海拔2200m,2001-Ⅶ-20,李后魂,玻片号ZAH03725。本种与同属其它种的区别在于：雄性爪形突下垂,抱器瓣狭长,左侧颈部具5根粗刺,右侧具四根。2．武夷绿小卷蛾Eucoenogenes wuyiensis,新种(图3～4)翅展13．0mm。正模：♂,福建武夷山仙峰岭,海拔1000m,2004-Ⅴ-26,于海丽采,玻片号ZAH04215副模：1♂,同正模。本种与其余种明显不同,区别在于：雄性爪形突细长,尾突侧生,三角形,抱器瓣颈部具一根粗刺。     

Helminth species diversity of mammals: parasite species richness is a host species attribute

Studies investigating parasite diversity have shown substantial geographical variation in parasite species richness. Most of these studies have, however, adopted a local scale approach, which may have masked more general patterns. Recent studies have shown that ectoparasite species richness in mammals seems highly repeatable among populations of the same mammal host species at a regional scale. In light of these new studies we have reinvestigated the case of parasitic helminths by using a large data set of parasites from mammal populations in 3 continents. We collected homogeneous data and demonstrated that helminth species richness is highly repeatable in mammals at a regional scale. Our results highlight the strong influence of host identity in parasite species richness and call for future research linking helminth species found in a given host to its ecology, immune defences and potential energetic trade-offs.     

Population dynamics of species with gynogenetic sibling species

Models are formulated for the population dynamics of a monoecious or dioecious species with an all-female parthenogenetic sibling species which is also gynogenetic. Continuous, deterministic reproduction and mortality, a stationary age distribution, random mating, and limited sexual competence for all individuals are posited. It is also supposed that in the dioecious case males do not distinguish between true and gynogenetic females. Similarly, hermaphrodites do not differentiate hermaphrodites and gynogens. The model implies that extinction is highly likely in the dioecious situation, but much less so in the monoecious one. Empirical evidence is reviewed and related to the assumptions and conclusions.     

Phylogenetic species recognition and species concepts in fungi

The operational species concept, i.e., the one used to recognize species, is contrasted to the theoretical species concept. A phylogenetic approach to recognize fungal species based on concordance of multiple gene genealogies is compared to those based on morphology and reproductive behavior. Examples where Phylogenetic Species Recognition has been applied to fungi are reviewed and concerns regarding Phylogenetic Species Recognition are discussed.     

Exotic species richness and native species endemism increase the impact of exotic species on islands

Aim Exotic species pose one of the most significant threats to biodiversity, especially on islands. The impacts of exotic species vary in severity among islands, yet little is known about what makes some islands more susceptible than others. Here we determine which characteristics of an island influence how severely exotic species affect its native biota. Location We studied 65 islands and archipelagos from around the world, ranging from latitude 65° N to 54° S. Methods We compiled a global database of 10 island characteristics for 65 islands and determined the relative importance of each characteristic in predicting the impact of exotic species using multivariate modelling and hierarchical partitioning. We defined the impact of exotic species as the number of bird, amphibian and mammal (BAM) species listed by the International Union for Conservation of Nature (IUCN) as threatened by exotics, relative to the total number of BAM species on that island. Results We found that the impact of exotic species is more severe on islands with more exotic species and a greater proportion of native species that are endemic. Unexpectedly, the level of anthropogenic disturbance did not influence an island's susceptibility to the impacts of exotic species. Main conclusions By coupling our results with studies on the introduction and establishment of exotic species, we conclude that colonization pressure, or invasion opportunities, influences all stages of the invasion process. However, species endemism, the other important factor determining the impact of exotic species, is not known to contribute to introduction and establishment success on islands. This demonstrates that different factors correlate with the initial stages of the invasion process and the subsequent impacts of those invaders, highlighting the importance of studying the impacts of exotic species directly. Our study helps identify islands that are at risk of impact by exotics and where investment should focus on preventing further invasions.     

Distinguishing species

Given two organisms, how can one distinguish whether they belong to the same species or not? This might be straightforward for two divergent organisms, but can be extremely difficult and laborious for closely related ones. A molecular marker giving a clear distinction would therefore be of immense benefit. The internal transcribed spacer 2 (ITS2) has been widely used for low-level phylogenetic analyses. Case studies revealed that a compensatory base change (CBC) in the helix II or helix III ITS2 secondary structure between two organisms correlated with sexual incompatibility. We analyzed more than 1300 closely related species to test whether this correlation is generally applicable. In 93%, where a CBC was found between organisms classified within the same genus, they belong to different species. Thus, a CBC in an ITS2 sequence-structure alignment is a sufficient condition to distinguish even closely related species.