New early Cambrian sponges of the Siberian platform and the origins of spiculate crown-group demosponges
文献类型：期刊论文
| 作者 | Kolesnikov, Kirill A.1,2; Botting, Joseph P.3,4; Ivantsov, Andrey Yu.2; Zhuravlev, Andrey Yu.2 |
| 刊名 | PAPERS IN PALAEONTOLOGY
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 10期号:4页码:18 |
| 关键词 | demosponge microsclere evolution Cambrian Heteroscleromorpha Siberia |
| ISSN号 | 2056-2799 |
| DOI | 10.1002/spp2.1582 |
| 通讯作者 | Kolesnikov, Kirill A.(kolkir@mail.ru) |
| 英文摘要 | Sponges are among the most common and diverse Cambrian fossils. However, the origin of the crown groups of the extant sponge classes constitutes the principal problem in the understanding of the evolution of these lower metazoans. New intact spiculate sponges from the lower Cambrian Stage 3-Stage 4 Sinsk Lagerst & auml;tte of the Siberian Platform enable a better understanding of the early evolution of crown-group demosponges. The skeletons of Neomenispongia plexa and N. diazoma gen. et sp. nov. consist mostly of simple oxeas, which are organized in relatively regular tufts that are additionally strengthened by sigmoidal spicules. The C-shaped elements of N. diazoma are megascleres in their size range but have sigmoidal shapes similar to sigma microscleres of extant demosponges; the sigmoidal spicules of N. plexa fully accord with microscleres and are the smallest spicules in known Cambrian demosponges. Together with an unnamed early Cambrian demosponge from the Sirius Passet biota (Greenland) and middle Cambrian Ulospongiella from the Burgess Shale (Canada), the new species represent the earliest heteroscleromorph demosponges and indicate an evolutionary origin of microscleres from megascleres. The thin, homogenous skeleton of Keithospongos loricatus gen. et sp. nov. is built of small, spirally arranged oxeas corresponding to the skeletal structure of the primitive Hazeliidae, which have been interpreted as the ancestral skeletal organization of demosponges. These new sponges therefore provide a link from extant spiculate demosponge groups to their more familiar Cambrian ancestors. |
| WOS关键词 | SIRIUS PASSET BIOTA ; HETANG FORMATION ; PORIFERA ; PRESERVATION ; PYRITIZATION ; ASSEMBLAGES ; SYSTEMATICS ; PHYLOGENY ; RECORD ; TOOL |
| WOS研究方向 | Paleontology |
| 语种 | 英语 |
| WOS记录号 | WOS:001286549900001 |
| 出版者 | WILEY |
| 源URL | [http://ir.nigpas.ac.cn/handle/332004/44143]  |
| 专题 | 中国科学院南京地质古生物研究所 |
| 通讯作者 | Kolesnikov, Kirill A. |
| 作者单位 | 1.Lomonosov Moscow State Univ, Fac Biol, Dept Biol Evolut, Leninskie Gory 1-12, Moscow 119234, Russia 2.Russian Acad Sci, Borissiak Palaeontol Inst, Profsoyuznaya St 123, Moscow 117647, Russia 3.Amgueddfa Cymru Natl Museum Wales, Dept Nat Sci, Cathays Pk, Cardiff CF10 3NP, Wales 4.Nanjing Inst Geol & Palaeontol, 39 East Beijing Rd, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kolesnikov, Kirill A.,Botting, Joseph P.,Ivantsov, Andrey Yu.,et al. New early Cambrian sponges of the Siberian platform and the origins of spiculate crown-group demosponges[J]. PAPERS IN PALAEONTOLOGY,2024,10(4):18. |
| APA | Kolesnikov, Kirill A.,Botting, Joseph P.,Ivantsov, Andrey Yu.,&Zhuravlev, Andrey Yu..(2024).New early Cambrian sponges of the Siberian platform and the origins of spiculate crown-group demosponges.PAPERS IN PALAEONTOLOGY,10(4),18. |
| MLA | Kolesnikov, Kirill A.,et al."New early Cambrian sponges of the Siberian platform and the origins of spiculate crown-group demosponges".PAPERS IN PALAEONTOLOGY 10.4(2024):18. |
入库方式： OAI收割
来源：南京地质古生物研究所
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