A new thalassematid echiuran worm from the Middle Ordovician Castle Bank Biota of Wales, UK

doi:10.4202/app.01107.2023

	A new thalassematid echiuran worm from the Middle Ordovician Castle Bank Biota of Wales, UK
	Botting, Joseph P.1,2; Muir, Lucy A.1
刊名	ACTA PALAEONTOLOGICA POLONICA
	2023
卷号	68 期号:4 页码:571-581
关键词	Annelida Echiura Thalassematidae Darriwilian Middle Ordovician United Kingdom
ISSN号	0567-7920
DOI	10.4202/app.01107.2023
通讯作者	Botting, Joseph P.(acutipuerilis@yahoo.co.uk)
英文摘要	Echiurans (spoonworms) are a very distinctive group of polychaete annelids that had long been considered to consti-tute a separate phylum. Their fossil record is extremely limited, although trace fossils that have been suggested to be attributable to them date back as far as the Cambrian Period. The oldest body fossils are from the Carboniferous Mazon Creek Biota, and preserve only limited morphological detail. New material from the Middle Ordovician (Darrivilian, Didymograptus murchisoni Biozone) Castle Bank Biota of Wales shows fine detail of the morphology of a new taxon, Llwygarua suzannae gen. et sp. nov., including several details that indicate an assignment to the derived family Thalassematidae, allied to the speciose genus Ochetostoma. These details include proboscis morphology, anterior setae, and muscle organisation within the trunk. An additional specimen is described in open nomenclature, as it may be either a distinct species, or a juvenile of Llwygarua suzannae gen. et sp. nov. with a relatively elongated proboscis. These worms demonstrate a very early and previously unrecognised diversification of the echiuran grown group, further supporting an early diversification of Annelida as a whole.
WOS关键词	CAMBRIAN CHENGJIANG BIOTA ; SIPUNCULAN WORMS ; FOSSIL ; SEA ; CHORDATE ; ANNELIDA ; DECAY
WOS研究方向	Paleontology
语种	英语
出版者	INST PALEOBIOLOGII PAN
WOS记录号	WOS:001164839000004
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/43312]
专题	中国科学院南京地质古生物研究所
通讯作者	Botting, Joseph P.
作者单位	1.Amgueddfa Cymru Natl Museum Wales, Dept Nat Sci, Cathays Pk, Cardiff CF10 3NP, Wales 2.Nanjing Inst Geol & Palaeontol, Chinese Acad Sci, 39 East Beijing Rd, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Botting, Joseph P.,Muir, Lucy A.. A new thalassematid echiuran worm from the Middle Ordovician Castle Bank Biota of Wales, UK[J]. ACTA PALAEONTOLOGICA POLONICA,2023,68(4):571-581.
APA	Botting, Joseph P.,&Muir, Lucy A..(2023).A new thalassematid echiuran worm from the Middle Ordovician Castle Bank Biota of Wales, UK.ACTA PALAEONTOLOGICA POLONICA,68(4),571-581.
MLA	Botting, Joseph P.,et al."A new thalassematid echiuran worm from the Middle Ordovician Castle Bank Biota of Wales, UK".ACTA PALAEONTOLOGICA POLONICA 68.4(2023):571-581.