利用心电的李氏数探讨混沌在生物进化中的作用

采集了进化程度不同的物种人和犬的心电信号,计算了心电信号的李氏数(Ｌｙａｐｕｎｏｖ指数),得出了以下结论:心电信号的李氏数反映了心脏的总体动态特征,它可作为一种定量研究心电图的新方法进行心血管疾病的早期诊断；生物进化是自然选择和混沌相结合的产物·     

新中文命名规则下的最新中国苦苣苔科植物名录

中国苦苣苔科植物的物种数量在过去的十余年内出现了令人惊讶的飞速增长,同时自2011年以来属一级水平上的大范围修订使得我国苦苣苔科植物物种系统位置的变动频繁而巨大,导致中文文献中使用的学名和对应的中文名称出现了相当程度上的混乱。本文整理了自专著《中国植物志·第69卷》《Flora of China:Vol. 18》《中国苦苣苔科植物》《华南苦苣苔科植物》和前一阶段归纳的我国苦苣苔科植物生物多样性文献付梓和发表以来,正式报道的所有中国苦苣苔科植物新分类群,提供了物种修订前后的新旧物种名的对照,为部分发表时未指定中文名称的新分类群新拟了中文名,对出现了混淆的物种中文名进行了梳理,以期为国内研究者更好地引用和使用我国苦苣苔科植物的中文名称奠定基础。截止2019年1月,我国已经正式报道和合格发表的苦苣苔科植物物种数已经有719种(含种下等级)。在新命名规则背景下梳理的中国苦苣苔科植物名录将在中国苦苣苔科植物保育中心(GCCC)的网站(http://gccc.gxib.cn)上实时更新。     

Thirteen new species of the genus Helina R.-D. (Diptera: Muscidae) from China

Thirteen new species of the genus Helina are described: H. briaroacantha sp. nov., H. corrugicerca sp. nov., H. cuneicauda sp. nov., H. curvoifemoralisa sp. nov., H. deqinensis sp. nov., H. dianibrunneigena sp. nov., H. kytososurstylia sp. nov., H. mesolobata sp. nov., H. nigrointermedia sp. nov., H. nudusimacula sp. nov., H. spinusiabdomena sp. nov., H. tigrisipedisa sp. nov., and H. yanzigouensis sp. nov.     

The Stegana shirozui species group (Diptera,Drosophilidae) from East Asia

One subgroup of the Stegana (Steganina) coleoptrata species group is elevated as a species group (i.e., the shirozui species group), so as to include the three known species, S. ctenaria Nishiharu, S. (S.) masanoritodai Okada and Sidorenko and S. (S.) shirozui Okada, as well nine new species reported from China and Japan: S. (S.) jiajinshanensis, S. (S.) jianfenglingensis, S. (S.) maoershanensis, S. (S.) multidentata, S. (S.) qinlingensis, S. (S.) saigusai, S. (S.) shennongi, S. (S.) wuyishanensis and S. (S.) xanthosticta spp. nov. A key to all the species of this group is provided.     

西北民族大学榆中校区校园植物种类调查

通过对西北民族大学榆中校区校园木本植物种类的调查,为了解学校现有植物种类提供帮助,也为学校的绿化工作提供基础.采用实地全面取样调查、收集资料、查阅工具书、请教后勤绿化队的工作人员等方法,对西北民族大学榆中校区校园植物种类进行了调查并做了鉴定.结果表明,西北民族大学榆中校区校园植物种类有47科,120属,150种.     

Description of a new hypogean species of the genus Trechus Clairville, 1806 from eastern Spain and comments on the Trechus martinezi‐lineage (Coleoptera: Adephaga: Carabidae)

Trechus torressalai new species, a cave‐dwelling ground beetle from eastern Spain is described. Ecological data are also included. Diverse morphological characters suggest they belong in the Trechus fulvus‐group. Detailed study of the aedeagus suggests taxonomic affinities with Trechus martinezi Jeannel, Trechus alicantinus Español, and Trechus beltrani Toribio. The close relationship among these species reveals an adelphotaxon‐complex that constitutes the T. martinezi‐lineage, exclusive to the north‐eastern Betic Mountains. An identification key to the species and biogeographical comments on the T. martinezi‐lineage are also included.

Se describe Trechus torressalai nueva especie, carábido cavernícola del Este de España. Se incluyen datos sobre su ecología. Diversos caracteres morfológicos aconsejan su inclusión dentro del amplio grupo de Trechus fulvus. El estudio detallado de la genitalia masculina sugiere su proximidad taxonómica a Trechus martinezi Jeannel, Trechus alicantinus Español y Trechus beltrani Toribio. Las estrechas afinidades entre estas cuatro especies desvela un complejo de adelfotaxones que constituyen el linaje de T. martinezi, exclusivo del extremo nororiental de las montañas Béticas. Se aportan claves de identificación para estas especies. Se incluyen comentarios sobre la biogeografía del linaje de T. martinezi.     

Eustigmaeus mites from Turkey (Acari: Stigmaeidae)

Five new species of the genus Eustigmaeus from Turkey, E. absens, E. erzincanensis, E. erzurumensis, E. fani and E. vacuus, are described and illustrated. Adult male of E. turcicus Do?an and Ayy?ld?z, and deutonymph of E. schusteri (Summers and Price, ) are described for the first time. Several new records are noted.     

A revision of the genus Prionocrangon (Crustacea: Decapoda: Caridea: Crangonidae)

Additional specimens belonging to the rare crangonid genus Prionocrangon Wood‐Mason and Alcock, collected from recent deep‐sea expeditions in the West Pacific enable a revision of this poorly known genus. The four previously described species are all valid. The type species P. ommatosteres Wood‐Mason and Alcock, , originally known only from the Andaman Sea, is considered to be also distributed in the Philippines and Indonesia. However, the material previously assigned to “P. ommatosteres” by de Man () and Chace () from Indonesia and the Philippines actually represents a new species, P. demani sp. nov., close to P. pectinata Faxon, . Prionocrangon pectinata and P. curvicaulis Yaldwyn, are still only known by their types. The distribution of P. dofleini Balss, is now extended from Japan to Taiwan. Two more new species are recognized. Prionocrangon formosa sp. nov. from Taiwan is closely related to P. curvicaulis while P. paucispina sp. nov. from Taiwan and New Caledonia is unique in having very few dorsal carapace spines. The genus Prionocrangon is newly diagnosed and a key to the species is provided. Nevertheless, a damaged specimen from the Sulu Sea could not be satisfactorily assigned to any of the above seven species, suggesting that this genus may have even higher diversity.     

The first record of the genus Vejdovskybathynella Serban and Leclerc, 1984 (Syncarida,Bathynellacea, Bathynellidae) in the Iberian Peninsula: three new species

Three new species of the genus Vejdovskybathynella are described from caves in northern Spain. It is the first time that this genus has been documented in the Iberian Peninsula. Vejdovskybathynella edelweiss n. sp. has several unique features: the setal formula of the antenna (0/2+exp/2+0/1+0/0+0/2+2/4); the form of the segments and claws of the mandibular palp of the mandible of the male; exopod of the female thoracopod VIII similar in size to the endopod (exopod is always longer than the endopod); small frontal projection of the basipod of the male thoracopod VIII, large or very large is common; the form and size of the lobes of the male thoracopod VIII is unique; the second spine of the furcal rami 2.5 times longer than the first spine. Vejdovskybathynella caroloi n. sp. has a unique male thoracopod VIII with a spur in the exopod that is a feature unknown in the genus, and additionally, this species has the smallest endopod of the thoracopod VIII male of the entire genus; the presence of three aesthetascs in segments VI and VII of the antennule had not been observed in this genus until now; the form of the segments of the mandibular palp of the mandible of the male are unique; the distal spine of the sympod of the uropod is larger than in other species, whereas in the rest of the species of the genus they are equal in size. Vejdovskybathynella pascalis n. sp. is the smallest species of the genus and has two and three aesthetascs in segments VI and VII of the antennule, respectively; it is the only species of the genus that has one seta on segment I and two setae on segment IV of the antenna; it has a unique male thoracopod VIII with a small spur on the frontal projection of the basipod and with the endopod larger than all other species in spite of its small size; the basal spine of the sympod of the uropod is smaller than the other three.