New early Cambrian sponges of the Siberian platform and the origins of spiculate crown-group demosponges

doi:10.1002/spp2.1582

NIGPAS OpenIR

	New early Cambrian sponges of the Siberian platform and the origins of spiculate crown-group demosponges
通讯作者	Kolesnikov, Kirill A.([email protected])
	Kolesnikov, Kirill A.1,2; Botting, Joseph P.3,4; Ivantsov, Andrey Yu.2; Zhuravlev, Andrey Yu.2
	2024-07-01
发表期刊	PAPERS IN PALAEONTOLOGY
ISSN	2056-2799
卷号	10 期号:4 页码:18
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.
关键词	demosponge microsclere evolution Cambrian Heteroscleromorpha Siberia
DOI	10.1002/spp2.1582
收录类别	SCI
语种	英语
关键词[WOS]	SIRIUS PASSET BIOTA ; HETANG FORMATION ; PORIFERA ; PRESERVATION ; PYRITIZATION ; ASSEMBLAGES ; SYSTEMATICS ; PHYLOGENY ; RECORD ; TOOL
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:001286549900001
出版者	WILEY
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44144
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.