| Two New“Notostracans”,Chenops gen.nov.and Jeholops gen.nov. (Crustacea:Branchiopoda:?Notostraca) from the Yixian Formation,Northeastern China |
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| 作者姓名： | Thomas A. HEGNA and REN Dong |
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| 作者单位： | Thomas A.HEGNA(Key Laboratory of Insect Evolution and Environmental Changes,Capital Normal University,Beijing 100048,China;Geology and Geophysics Department,Yale University,New Haven,Connecticut,USA);REN Dong(Geology and Geophysics Department,Yale University,New Haven,Connecticut,USA) |
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| 基金项目： | This research is supported by the National Natural Science Foundation of China，the Nature Science Foundation of Beijing，Scientific Research Key Program and PHR Project of Beijing Municipal Commission of Education. TAH was funded by a Crustacean Society Denton Belk Fellowship and the Yale Peabody Museum |
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| 摘 要： | <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.
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| 关 键 词： | Arthropoda Crustacea Branchiopoda Phyllopoda Calmanostraca Notostraca Early ?Cretaceous Mesozoic Yixian Formation Jehol biota inner Mongolia Hebei China |
| 收稿时间： | 1/4/2010 12:00:00 AM |
| 修稿时间： | 3/4/2010 12:00:00 AM |
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