| 云南寒武纪早期澄江生物群中原始海绵科似斜纹海绵属新种 |
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| 引用本文： | 马海丹,杨继媛,陈爱林,侯先光,唐烽.云南寒武纪早期澄江生物群中原始海绵科似斜纹海绵属新种[J].地质学报,2019,93(11):2715-2728. |
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| 作者姓名： | 马海丹 杨继媛 陈爱林 侯先光 唐烽 |
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| 作者单位： | 玉溪师范学院古生物研究中心,云南玉溪,653100;教育部云南重大生物演化事件及古环境国际合作联合实验室,昆明,650091;现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所,南京,210008;教育部云南重大生物演化事件及古环境国际合作联合实验室,昆明,650091;云南大学云南省古生物研究重点实验室,昆明,650091;中国地质科学院地质研究所,北京,100037 |
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| 基金项目： | 本文为国家自然科学基金项目(编号41662003；41572024)；云南省创新团队项目(编号2015HC029)；现代古生物学和地层学国家重点实验室(中国科学院南京地质古生物研究所)项目(编号193104)；地质调查工作项目(DD20190008)联合资助。 |
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| 摘 要： | 本文报道澄江生物群似斜纹海绵属Paradiagoniella的两个新种：橄榄形似斜纹海绵P.oliviformis sp. nov. 和锥形似斜纹海绵P. conicasp. nov. 。两个新种具有似斜纹海绵属的基本特征：体壁薄；由排列不规则、分级的十字骨针为基底构成骨骼；除十字骨针外，还穿插排列有五射针、六射针、弯弓形和针形双尖单轴针等。然而与模式种不同，两个新种十字骨针分级不明显；同时，两个新种在外形、骨针组成、最大十字骨针射长比等方面，与本属的其他种都存在明显差异。新材料的发现增加了寒武纪早期原始海绵物种多样性，为研究海绵动物早期起源演化提供了新信息。
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| 关 键 词： | 寒武纪 澄江生物群 多孔动物 六射海绵 网针海绵 原始海绵 |
| 收稿时间： | 2019/4/9 0:00:00 |
| 修稿时间： | 2019/7/22 0:00:00 |
New species of protospongiid sponges from the Early Cambrian Chengjiang biota in Yunnan |
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| MA Haidan,YANG Jiyuan,CHEN Ailin,HOU Xianguan and TANG Feng.New species of protospongiid sponges from the Early Cambrian Chengjiang biota in Yunnan[J].Acta Geologica Sinica,2019,93(11):2715-2728. |
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| Authors: | MA Haidan YANG Jiyuan CHEN Ailin HOU Xianguan and TANG Feng |
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| Institution: | 1) Yuxi Normal University, Yuxi, Yunnan, 653100;2) MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Kunming, 650091;3) State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences, Nanjing, 210008,1) Yuxi Normal University, Yuxi, Yunnan, 653100;2) MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Kunming, 650091;3) State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences, Nanjing, 210008,1) Yuxi Normal University, Yuxi, Yunnan, 653100;2) MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Kunming, 650091;3) State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences, Nanjing, 210008,2) MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Kunming, 650091;4) Yunnan Key Laboratory for Palaeobiology, Yunnan University, Kunming, Yunnan, 650091 and 5) Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037 |
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| Abstract: | Two new species of Paradiagoniella collected from the Chengjiang biota, Paradiagoniella oliviformis sp. nov. and P.conica sp. nov. , are reported here. Similar to P. magna (type species) and P.xiaolantianensis they are thin walled sponge with dense mesh of stauractines and a minor amount of oxeas (straight or curveddiactines) to form the main skeleton; Rare hexactine or pentactine may also be present; Stauractines ranked in size. But they can be distinguished from the type species by the rank less stauractines. The two new species differ in many features, such as the overall form of body and the composition of spicules. These new materials suppose that protospongiid sponges have a high diversity in the early Cambrianperiod and provide new information for understanding the evolutionary significance of protospongiids and the early evolution of hexactinellids and siliceans |
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| Keywords: | Cambrian Chengjiang biota Porifera Hexactinellida Reticulosa Protospongiidae |
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