An outline of the distribution and diversity of Porifera in the Ordovician Builth Inlier (Wales, UK)

doi:10.1016/j.palwor.2014.11.003

	An outline of the distribution and diversity of Porifera in the Ordovician Builth Inlier (Wales, UK)
	Muir, Lucy A.1; Botting, Joseph P.1,2
	2015-03-01
发表期刊	PALAEOWORLD
ISSN	1871-174X
卷号	24 期号:1-2 页码:176-190
摘要	The Builth Inlier contains a sequence of siliciclastic and volcanic rocks of Middle to Late Ordovician age, representing a range of water depths in a volcanic island setting. Sponges are preserved at sites representing all preserved palaeoenvironments; they are a major part of the fauna at many localities and are dominant in abundance and in diversity at a minimum of five sites. The currently known sponge diversity of the inlier is 128 species. Based on long-term collecting, the distributions of sponge groups are observed to be largely correlated with palaeobathymetry. The faunas representing the shallowest-water (sandy facies) are dominated by large, robust, monaxon-bearing sponges, thick-walled hexactine-bearing forms, and agglutinating sponges. In slightly deeper water (fine sand facies), only robust hexactine-bearing sponges have been found. Below normal wave base (primarily siltstone facies), protomonaxonids and reticulosans occur; protomonaxonids were dominant above storm wave base and reticulosans in the deepest settings. The diversity of sponges both within and between localities is unexpectedly high, with sponges usually being the most diverse group at sites with a degree of exceptional preservation. Only a few genera or species have been found at more than one locality, indicating either random sampling of extremely diverse communities, or highly restricted and patchy distributions with much higher total diversity. If the Builth Inlier is typical of Ordovician siliciclastic environments in general, then Ordovician community diversity has been significantly underestimated. (C) 2014 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
关键词	Darriwilian Porifera Hexactinellida Demospongiae Protomonaxonida
DOI	10.1016/j.palwor.2014.11.003
语种	英语
关键词[WOS]	BURGESS SHALE ; HEXACTINELLID SPONGES ; LLANDRINDOD INLIER ; DRUM MOUNTAINS ; HOUSE RANGE ; CHINA ; BIOTA ; BIODIVERSIFICATION ; PALEOECOLOGY ; LAGERSTATTE
资助项目	Collections Enhancement Grant of the Natural History Museum, London ; Sylvester-Bradley Award from the Palaeontological Association ; International Geoscience Programme (IGCP) Project - The Early to Middle Paleozoic Revolution[591]
WOS研究方向	Paleontology
WOS类目	Paleontology
WOS记录号	WOS:000356433200017
项目资助者	Collections Enhancement Grant of the Natural History Museum, London ; Sylvester-Bradley Award from the Palaeontological Association ; International Geoscience Programme (IGCP) Project - The Early to Middle Paleozoic Revolution
出版者	ELSEVIER SCIENCE BV
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/11805
专题	中国科学院南京地质古生物研究所
通讯作者	Muir, Lucy A.
作者单位	1.Chatsworth, Llandrindod Wells LD1 5EY, Powys, England 2.Nanjing Inst Geol & Palaeontol, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Muir, Lucy A.,Botting, Joseph P.. An outline of the distribution and diversity of Porifera in the Ordovician Builth Inlier (Wales, UK)[J]. PALAEOWORLD,2015,24(1-2):176-190.
APA	Muir, Lucy A.,&Botting, Joseph P..(2015).An outline of the distribution and diversity of Porifera in the Ordovician Builth Inlier (Wales, UK).PALAEOWORLD,24(1-2),176-190.
MLA	Muir, Lucy A.,et al."An outline of the distribution and diversity of Porifera in the Ordovician Builth Inlier (Wales, UK)".PALAEOWORLD 24.1-2(2015):176-190.