Diagnosis of a new species of neolithodes (Crustacea: Anomura: Lithodidae) from New Zealand (note)     

Elliot W. Dawson  J. C. Yaldwyn 《新西兰海洋与淡水研究杂志》2013,47(2):227-228

A new stone crab, Neolithodes brodiei sp.nov., known from an ovigerous female taken in 455 fm (832 m) on the Campbell Plateau, is characterised and distinguished from the five species previously recognised. It is morphologically close to the North Atlantic N. agassizii and the South African N. asperrimus.  相似文献   

The river continuum concept — reply to Barmuta and Lake     

M. J. Winterbourn 《新西兰海洋与淡水研究杂志》2013,47(2):229-231

Spectral analyses of water‐level oscillations in Wellington Harbour during the 1960 Chilean and 1964 Alaskan tsunamis are given. The results are used to define the periods for the three longest‐period characteristic oscillation modes. Some implications for future tsunamis are discussed.  相似文献   

Two New“Notostracans”,Chenops gen.nov.and Jeholops gen.nov. (Crustacea:Branchiopoda:?Notostraca) from the Yixian Formation,Northeastern China   总被引：1，自引：1，他引：0  

Thomas A. HEGNA  and REN Dong 《《地质学报》英文版》2010,84(4):886-894

<正>The Early Cretaceous Jehol biota of northeastern China contains a diverse group of notostracans, including two genera,Chenops and Jeholops,described here.Chenops is characterized by a combination of an ovate carapace,narrow anal plate,equant distal endites and endopod on the anterior thoracic limbs.In addition to the new species,Chenops yixianensis,the genus also provisionally includes Prolepidurus oblongus Oleynikov, 1968.Jeholops,however,is monotypic,represented by the new species Jeholops hongi.It is characterized by a combination of kazacharthran and notostracan features unique to this taxon.Both new genera are provisionally placed in the taxon Notostraca.More detailed work exploring the morphology of exceptionally-preserved branchiopod crustaceans is needed.The difficulties in placing fossil notostracans into a phylogenetic framework are discussed.  相似文献   

贵州瓮安埃迪卡拉系陡山沱组上段底部和下段的遗迹化石     

王约  徐一帆 《现代地质》2007,21(3):469-478

贵州瓮安地区埃迪卡拉系陡山沱组上段产有保存良好的具有生物多样化特征、包含多种门类磷质球粒状化石库的“瓮安生物群”,成为地球早期生物特别是早期后生动物和动物胚胎化石研究的焦点地区。描述了产自瓮安陡山沱组“瓮安生物群”产出层位底部和之下层位的3个后生动物遗迹：Wenganichnus nanbaoensis（ichnogen. et ichnosp. nov.）为具有衬里和半月形回填构造的微弯曲的潜穴管; Doushantuoichnus curvatus（ichnogen. et ichnosp. nov. ）为具有细小横纹脊的中沟和两排呈叠瓦状排列的小羽叶状凸起的表生迹;?Planolites ichnosp. 为任意弯曲的、与围岩岩性略有区别的长线状底迹突起。遗迹化石的形态特征表明它们的造迹生物为沿一定方向运动的、背部与腹部以及前部与后部分化的、两侧对称的蠕虫状后生动物,而非沉积构造。“瓮安生物群”中后生动物的卵和胚胎化石可能系不易保存的软躯体动物的卵和胚胎在水动力作用下与沉积物一起被搬运、沉积,埋藏于较高能浅水环境并处于休眠状态,且被保存。  相似文献