New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte

Stem-group euarthropods are important for understanding the early evolutionary and ecological history of the most species-rich animal phylum on Earth. Of particular interest are fossil taxa that occupy a phylogenetic position immediately crownwards of radiodonts, for this part of the euarthropod tre...

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Autores principales:	De-guang Jiao, Stephen Pates, Rudy Lerosey-Aubril, Javier Ortega-Hernández, Jie Yang, Tian Lan, Xi-guang Zhang
Formato:	article
Lenguaje:	EN
Publicado:	The Royal Society 2021
Materias:	Chengjiangocarididae Deuteropoda Euarthropoda Fuxianhuiida Lihuacaris ferox Radiodonta Science Q
Acceso en línea:	https://doaj.org/article/b195d0144dfc4cf18135c37576bb2951
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spelling	oai:doaj.org-article:b195d0144dfc4cf18135c37576bb29512021-11-23T06:16:38ZNew multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte10.1098/rsos.2111342054-5703https://doaj.org/article/b195d0144dfc4cf18135c37576bb29512021-11-01T00:00:00Zhttps://royalsocietypublishing.org/doi/10.1098/rsos.211134https://doaj.org/toc/2054-5703Stem-group euarthropods are important for understanding the early evolutionary and ecological history of the most species-rich animal phylum on Earth. Of particular interest are fossil taxa that occupy a phylogenetic position immediately crownwards of radiodonts, for this part of the euarthropod tree is associated with the appearance of several morphological features that characterize extant members of the group. Here, we report two new euarthropods from the Cambrian Stage 4 Guanshan Biota of South China. The fuxianhuiid Alacaris? sp. is represented by isolated appendages composed of a gnathobasic protopodite and an endite-bearing endopod of at least 20 podomeres. This material represents the youngest occurrence of the family Chengjiangocarididae, and its first record outside the Chengjiang and Xiaoshiba biotas. We also describe Lihuacaris ferox gen. et sp. nov. based on well-preserved and robust isolated appendages. Lihuacaris ferox exhibits an atypical combination of characters including an enlarged rectangular base, 11 endite-bearing podomeres and a hypertrophied distal element bearing 8–10 curved spines. Alacaris? sp. appendages display adaptations for macrophagy. Lihuacaris ferox appendages resemble the frontal appendages of radiodonts, as well as the post-oral endopods of chengjiangocaridid fuxianhuids and other deuteropods with well-documented raptorial/predatory habits. Lihuacaris ferox contributes towards the record of endemic biodiversity in the Guanshan Biota.De-guang JiaoStephen PatesRudy Lerosey-AubrilJavier Ortega-HernándezJie YangTian LanXi-guang ZhangThe Royal SocietyarticleChengjiangocarididaeDeuteropodaEuarthropodaFuxianhuiidaLihuacaris feroxRadiodontaScienceQENRoyal Society Open Science, Vol 8, Iss 11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chengjiangocarididae Deuteropoda Euarthropoda Fuxianhuiida Lihuacaris ferox Radiodonta Science Q
spellingShingle	Chengjiangocarididae Deuteropoda Euarthropoda Fuxianhuiida Lihuacaris ferox Radiodonta Science Q De-guang Jiao Stephen Pates Rudy Lerosey-Aubril Javier Ortega-Hernández Jie Yang Tian Lan Xi-guang Zhang New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte
description	Stem-group euarthropods are important for understanding the early evolutionary and ecological history of the most species-rich animal phylum on Earth. Of particular interest are fossil taxa that occupy a phylogenetic position immediately crownwards of radiodonts, for this part of the euarthropod tree is associated with the appearance of several morphological features that characterize extant members of the group. Here, we report two new euarthropods from the Cambrian Stage 4 Guanshan Biota of South China. The fuxianhuiid Alacaris? sp. is represented by isolated appendages composed of a gnathobasic protopodite and an endite-bearing endopod of at least 20 podomeres. This material represents the youngest occurrence of the family Chengjiangocarididae, and its first record outside the Chengjiang and Xiaoshiba biotas. We also describe Lihuacaris ferox gen. et sp. nov. based on well-preserved and robust isolated appendages. Lihuacaris ferox exhibits an atypical combination of characters including an enlarged rectangular base, 11 endite-bearing podomeres and a hypertrophied distal element bearing 8–10 curved spines. Alacaris? sp. appendages display adaptations for macrophagy. Lihuacaris ferox appendages resemble the frontal appendages of radiodonts, as well as the post-oral endopods of chengjiangocaridid fuxianhuids and other deuteropods with well-documented raptorial/predatory habits. Lihuacaris ferox contributes towards the record of endemic biodiversity in the Guanshan Biota.
format	article
author	De-guang Jiao Stephen Pates Rudy Lerosey-Aubril Javier Ortega-Hernández Jie Yang Tian Lan Xi-guang Zhang
author_facet	De-guang Jiao Stephen Pates Rudy Lerosey-Aubril Javier Ortega-Hernández Jie Yang Tian Lan Xi-guang Zhang
author_sort	De-guang Jiao
title	New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte
title_short	New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte
title_full	New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte
title_fullStr	New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte
title_full_unstemmed	New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte
title_sort	new multipodomerous appendages of stem-group euarthropods from the cambrian (stage 4) guanshan konservat-lagerstätte
publisher	The Royal Society
publishDate	2021
url	https://doaj.org/article/b195d0144dfc4cf18135c37576bb2951
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New multipodomerous appendages of stem-group euarthropods from the Cambrian (Stage 4) Guanshan Konservat-Lagerstätte

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