毛绥螨属3新种记述（蜱螨亚纲：中气门目：裂胸螨科）

记述毛绥螨属3新种：矩殖毛绥螨Lasioseius orthocegenitalis sp. nov.,林氏毛绥螨Lasioseius linjianzheni sp. nov.和张氏毛绥螨Lasioseius zhangyanxuanae sp. nov.。     

毛绥螨属六新种(蜱螨亚纲:裂胸螨科)

毛绥螨属Lasioseius Berlese隶属于裂胸螨科Aceosejidae,国内仅有过混毛绥螨L. confusus,Evans的纪录。本文绘图描述了采自贵州和陕西省啮齿类体上的毛绥螨属6新种:匙毛绥螨L. spatula sp. nov. 贫板毛绥螨L. paucispathus sp. nov.、裂毛绥螨L. schizopilus sp. nov.、黔毛绥螨L. qianensis sp. nov.、点毛绥螨L. punctatus sp. nov. 及多板毛绥螨L. multispathus sp. nov.。文中列举各新种的宿主与采集纪录及与相近种类的鉴别。     

全雪螨属1新种和匙毛绥螨雄螨新发现(蜱螨亚纲:中气门目:裂胸螨科)

本文记述全雪螨属1新种:菱形全雪螨Panteniphis rhombus sp.nov.,并描述匙毛绥螨Lasioseius spatulus Gu et Wang,1990雄螨。     

裂胸螨科4新种和中国2新纪录属：蜱螨亚纲：革螨股

记述裂胸螨科4新种:陈氏毛绥螨Lasioseius chenpengi sp.nov.,杵状肛厉螨Proctolaelaps pis-tilli sp.nov.,疏毛北绥螨Arctoseius oligotrichus sp.nov.和巨肛伊(虫穴)螨中Iphidozercon magnanalis sp.nov.。其中北绥螨属Arctoseius Thor,1930和伊(虫穴)螨属Iphidozercon Berlese,1903为中国首次纪录。     

毛绥螨属一新种(蜱螨亚纲,裂胸螨科)

记述裂胸螨科Aceosejidae毛绥螨属Lasioseius Berlese,1916一新种,多毛毛绥螨Lasioseius multisetus sp.nov..标本采自宁夏回族自治区银川市南郊天牛洞道,保存于军事医学科学院微生物流行病研究所医学昆虫标本馆.文内测量单位均为μm.     

毛绥螨属一新种(蜱螨亚纲：裂胸螨科)

报道列胞螨科Aceosejidae Baker et Wharton,1952毛绥螨属Lasioseius Berlese,1916一新种,即青海毛缓螨Lasioseius qinghaiensis sp.von.。     

毛绥螨属2新种（蜱螨亚纲：囊螨科）

记述毛绥螨属2新种:前毛绥螨Lasioseiue praevius sp.nov.与中毛绥螨Lasiosius medius sp.nov.     

毛绥螨属1新种和囊螨属1新种（蜱螨亚纲：裂胸螨科,胭螨科）

描述廖氏毛绥螨,新种Lasioseius jilinsimilis sp.nov.和植囊螨,新种Ascaplantaria sp.nov.     

常革螨属一新种和下盾螨属一新种(蜱螨亚纲:革螨股:寄螨科,厉螨科)

记述常革螨属1新种：湖北常革螨Vulgarogamasus huberensis Ma et Liu,sp.nov.和下盾螨属1新种：类刺下盾螨Hypoaspis spinaperaffinis Ma et Cui,sp.nov.。     

囊螨属五新种记述(蜱螨亚纲,中气门目,胭螨科)

记述囊螨属5新种:山东囊螨Asca shandongensis Ma et Lin,sp.nov.,福建囊螨Ascafujianensis Ma et Lin,sp.nov.,云南囊螨Asca yunnanensis Ma et Zhang,sp.nov.,海南囊螨Asca hainanensis Ma et Lin,sp.nov.和拟云囊螨Ascaimitonubes Ma et Lin,sp.nov.。     

Primate taxonomy: Species and conservation

Primatology as a discrete branch of science involving the study of primate behavior and ecology took off in the 1960s after discovery of the importance of primates as models for biomedical research and the realization that primates provide insights into the evolutionary history of humans. Osman Hill's unfortunately incomplete monograph series on the comparative anatomy and taxonomy of the primates¹ and the Napiers' 1967 A Handbook of Living Primates² recorded the world's view of primate diversity at this time. This taxonomy remained the baseline for nearly three decades, with the diversity of each genus being represented by some species, but extensively as subspecies.     

Species of Echinococcus: pattern and process

Although classification and nomenclature within the cestode genus Echinococcus has, historically, been controversial, the past 20-30 years have provided a period of relative stability. Recent calls for taxonomic revision in the genus have therefore created something of a stir. In this article, Alan Lymbery and Andrew Thompson describe the reasons for the new controversy, and suggest that the problem can only be resolved by agreement on an appropriate species concept and on operational procedures for implementing that concept.     

Species: Beasts of burden

Ernst Mayr (1904–2005) was the twentieth century's most influential writer to wrestle with the species problem. 1 - 4 The following draws heavily on his work, albeit without presumptuously claiming to mirror his thinking or present any original ideas. As a personal meditation, I am thinking mostly of platyrrhines. Following Mayr, I adhere to what is commonly called the Biological Species Concept (BSC) as a way of thinking about a species in the real‐world biosphere as a taxon. I also hold to the idea that the Linnaean category called species has the same function as other categories: a linguistic tool for organizing and retrieving information about biodiversity while embodying evolutionary hypotheses. In other words, alpha taxonomy, the area of systematics that involves identifying, naming, and classifying species, is not purely an exercise in either biology or inventory because it involves communication as well. The burdensome work of the species category stems partly from tension created by the several purposes associated with the concept: the objective observation and examination of a fundamental biological phenomenon, the collection and interpretation of data in a selective context of relevance, and the intention to deploy scientific decisions as a form of communication within a dynamic but highly structured language system.     

Species: author definitions

For a long time the definitions of species have been mainly restricted to logicians and philosophers; with the contribution of biologists, the number of concepts increased dramatically. The concepts elaborated by authors of the evolutionary synthesis seemed decisive for a time but the number of definitions proposed was never as high as in the last half century. In the present review, a list of classical or less well-known definitions are proposed with some commentaries.     

Host Specificity of Pathogenic Pythium Species: Implications for Tree Species Diversity

In the Janzen–Connell hypothesis, host-specific natural enemies enhance species diversity and influence the structure of plant communities. This study tests the explicit assumption of host specificity for soil pathogens of the genus Pythium that cause damping-off disease of germinating seeds and seedlings. We isolated Pythium spp. from soil of a tropical forest in Panama. Then, in an inoculation experiment, we determined the pathogenicity of 75 tropical isolates of unknown pathogenicity and seven pathogenic temperate isolates of Pythium on seeds and/or seedlings of eight tropical tree species. Only three tropical isolates, one identified as P. ultimum and two as P. aphanidermatum , were pathogenic. Tropical pathogenic isolates were pathogenic on 4–6 of eight tree species. Temperate isolates were pathogenic on 0–4 of eight species, indicating that some tropical tree species are susceptible to novel isolates of Pythium . No tree species was susceptible to all isolates and two species were not susceptible to any isolate. Collectively, these results indicate that these Pythium isolates vary widely in their pathogenicity, causing differential mortality of potential host species; likewise, the tree species vary in their susceptibility to a given Pythium isolate. These differences in pathogenicity and susceptibility indicate some support for the Janzen–Connell assumption of host specificity. While they are not restricted to a single species, their intermediate level of specificity suggests that Pythium spp. have the potential to have some effect on forest community structure and diversity.     

Species diversity and dominance: A comment

Misra etMisra (1981) have concluded, on the basis of an analysis of a grassland community, that there is significant negative correlation between species diversity and dominance indices. It is shown that this result is an unfortunate misunderstanding because negative correlation is an inevitable consequence of indices definitions. Some other shortcomings concerning diversity, stability and species-abundance distributions, contained in the paper, are pointed out.     

Species borders: ecological and evolutionary perspectives

Recent ecological studies on species borders have used a number of approaches to establish causation for specific environmental factors and to identify the traits involved. These include interspecific comparisons, detailed investigations of marginal populations, and experimental manipulation. Species borders continue to be largely ignored in evolutionary biology, although some work suggests that marginal populations may often be relatively better-adapted to unfavourable conditions but perform poorly under most other conditions.