A new xandarellid euarthropod from the Cambrian Chengjiang biota, Yunnan Province, China
The euarthropod Luohuilinella deletres sp. nov. is described from rare material from the Chengjiang biota, Cambrian Series 2, Stage 3, of Yunnan Province, China. Phylogenetic analysis recovers a xandarellid affinity for L. deletres, representing only the fifth described species of this clade. L. del...
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| Veröffentlicht in: | Geological magazine 2019-08, Vol.156 (8), p.1375-1384 |
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| creator | Hou, Xianguang Williams, Mark Sansom, Robert Siveter, Derek J. Siveter, David J. Gabbott, Sarah Harvey, Thomas H. P. Cong, Peiyun Liu, Yu |
| description | The euarthropod Luohuilinella deletres sp. nov. is described from rare material from the Chengjiang biota, Cambrian Series 2, Stage 3, of Yunnan Province, China. Phylogenetic analysis recovers a xandarellid affinity for L. deletres, representing only the fifth described species of this clade. L. deletres possesses a head shield that is about one-fifth of the total body length and a trunk with 30 tergites, the reduced anterior-most tergite and terminal three tergites lacking pleural elongations. Anteriorly situated notches in the head shield are associated with stalked eyes, in contrast to the more posterior, enclosed eye slits present in Xandarella. Posterior to the antennae there are at least 11 pairs of biramous appendages preserved, including three pairs in the head. The morphology of the midline gut of L. deletres, in which lateral, unbranched diverticula are wider towards the front of the body, is a characteristic also found in various trilobites. The dorsoventrally flattened exoskeleton suggests a benthic or nektobenthic mode of life for L. deletres, as for other trilobitomorphs, and it likely used its well-developed anteriorly positioned eyes for searching out food, either to scavenge or to find prey. |
| doi_str_mv | 10.1017/S0016756818000730 |
| format | Article |
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P. ; Cong, Peiyun ; Liu, Yu</creator><creatorcontrib>Hou, Xianguang ; Williams, Mark ; Sansom, Robert ; Siveter, Derek J. ; Siveter, David J. ; Gabbott, Sarah ; Harvey, Thomas H. P. ; Cong, Peiyun ; Liu, Yu</creatorcontrib><description>The euarthropod Luohuilinella deletres sp. nov. is described from rare material from the Chengjiang biota, Cambrian Series 2, Stage 3, of Yunnan Province, China. Phylogenetic analysis recovers a xandarellid affinity for L. deletres, representing only the fifth described species of this clade. L. deletres possesses a head shield that is about one-fifth of the total body length and a trunk with 30 tergites, the reduced anterior-most tergite and terminal three tergites lacking pleural elongations. Anteriorly situated notches in the head shield are associated with stalked eyes, in contrast to the more posterior, enclosed eye slits present in Xandarella. Posterior to the antennae there are at least 11 pairs of biramous appendages preserved, including three pairs in the head. The morphology of the midline gut of L. deletres, in which lateral, unbranched diverticula are wider towards the front of the body, is a characteristic also found in various trilobites. The dorsoventrally flattened exoskeleton suggests a benthic or nektobenthic mode of life for L. deletres, as for other trilobitomorphs, and it likely used its well-developed anteriorly positioned eyes for searching out food, either to scavenge or to find prey.</description><identifier>ISSN: 0016-7568</identifier><identifier>EISSN: 1469-5081</identifier><identifier>DOI: 10.1017/S0016756818000730</identifier><language>eng</language><publisher>Cambridge, UK: Cambridge University Press</publisher><subject>Antennae ; Appendages ; Arthropoda ; Arthropods ; Asia ; Benthos ; Biota ; Body length ; Cambrian ; Cameras ; Chengjiang fauna ; China ; Exoskeleton ; Exoskeletons ; Far East ; Grants ; Head ; invertebrate ; invertebrates ; Laboratories ; Luohuilinella deletres ; Marine invertebrates ; Morphology ; New species ; new taxa ; Notches ; Original Article ; paleoecology ; Paleontology ; Paleozoic ; Phylogeny ; Prey ; Slits ; taxonomy ; Xandarellida ; Yunnan China</subject><ispartof>Geological magazine, 2019-08, Vol.156 (8), p.1375-1384</ispartof><rights>Cambridge University Press 2018</rights><rights>GeoRef, Copyright 2020, American Geosciences Institute. 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Abstract, Copyright, Cambridge University Press</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a419t-1cabd68fbd99052ed94255e3f68090a68ad4b9ada2eaf2b297cd24cc8899e9413</citedby><cites>FETCH-LOGICAL-a419t-1cabd68fbd99052ed94255e3f68090a68ad4b9ada2eaf2b297cd24cc8899e9413</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.cambridge.org/core/product/identifier/S0016756818000730/type/journal_article$$EHTML$$P50$$Gcambridge$$H</linktohtml><link.rule.ids>164,314,776,780,27903,27904,55607</link.rule.ids></links><search><creatorcontrib>Hou, Xianguang</creatorcontrib><creatorcontrib>Williams, Mark</creatorcontrib><creatorcontrib>Sansom, Robert</creatorcontrib><creatorcontrib>Siveter, Derek J.</creatorcontrib><creatorcontrib>Siveter, David J.</creatorcontrib><creatorcontrib>Gabbott, Sarah</creatorcontrib><creatorcontrib>Harvey, Thomas H. P.</creatorcontrib><creatorcontrib>Cong, Peiyun</creatorcontrib><creatorcontrib>Liu, Yu</creatorcontrib><title>A new xandarellid euarthropod from the Cambrian Chengjiang biota, Yunnan Province, China</title><title>Geological magazine</title><addtitle>Geol. Mag</addtitle><description>The euarthropod Luohuilinella deletres sp. nov. is described from rare material from the Chengjiang biota, Cambrian Series 2, Stage 3, of Yunnan Province, China. Phylogenetic analysis recovers a xandarellid affinity for L. deletres, representing only the fifth described species of this clade. L. deletres possesses a head shield that is about one-fifth of the total body length and a trunk with 30 tergites, the reduced anterior-most tergite and terminal three tergites lacking pleural elongations. Anteriorly situated notches in the head shield are associated with stalked eyes, in contrast to the more posterior, enclosed eye slits present in Xandarella. Posterior to the antennae there are at least 11 pairs of biramous appendages preserved, including three pairs in the head. The morphology of the midline gut of L. deletres, in which lateral, unbranched diverticula are wider towards the front of the body, is a characteristic also found in various trilobites. The dorsoventrally flattened exoskeleton suggests a benthic or nektobenthic mode of life for L. deletres, as for other trilobitomorphs, and it likely used its well-developed anteriorly positioned eyes for searching out food, either to scavenge or to find prey.</description><subject>Antennae</subject><subject>Appendages</subject><subject>Arthropoda</subject><subject>Arthropods</subject><subject>Asia</subject><subject>Benthos</subject><subject>Biota</subject><subject>Body length</subject><subject>Cambrian</subject><subject>Cameras</subject><subject>Chengjiang fauna</subject><subject>China</subject><subject>Exoskeleton</subject><subject>Exoskeletons</subject><subject>Far East</subject><subject>Grants</subject><subject>Head</subject><subject>invertebrate</subject><subject>invertebrates</subject><subject>Laboratories</subject><subject>Luohuilinella deletres</subject><subject>Marine invertebrates</subject><subject>Morphology</subject><subject>New species</subject><subject>new taxa</subject><subject>Notches</subject><subject>Original Article</subject><subject>paleoecology</subject><subject>Paleontology</subject><subject>Paleozoic</subject><subject>Phylogeny</subject><subject>Prey</subject><subject>Slits</subject><subject>taxonomy</subject><subject>Xandarellida</subject><subject>Yunnan China</subject><issn>0016-7568</issn><issn>1469-5081</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kFtLw0AQhRdRsFZ_gG8LPtro7Oa2-1iCNygoqKBPYZLdpCnpbt0kVv-9W1tQEJ9mhvPNHOYQcsrgggFLLx8BWJLGiWACANIQ9siIRYkMYhBsn4w2crDRD8lR1y38GIIQI_IypUav6QcahU63baOoHtD1c2dXVtHK2SXt55pmuCxcg4Zmc23qhe9qWjS2xwl9HYzxwoOz740p9cQjjcFjclBh2-mTXR2T5-urp-w2mN3f3GXTWYARk33ASixUIqpCSQkx10pGPI51WCUCJGAiUEWFRIVcY8ULLtNS8agshZBSy4iFY3K2vbty9m3QXZ8v7OCMt8w5jyWPhOTgKbalSme7zukqX7lmie4zZ5BvAsz_BOh3zrc7tbZd2Wj_29q6Vv0yACZzSCER0tPhzuE7KVXrH-5_jy885YDl</recordid><startdate>201908</startdate><enddate>201908</enddate><creator>Hou, Xianguang</creator><creator>Williams, Mark</creator><creator>Sansom, Robert</creator><creator>Siveter, Derek J.</creator><creator>Siveter, David J.</creator><creator>Gabbott, Sarah</creator><creator>Harvey, Thomas H. 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P.</au><au>Cong, Peiyun</au><au>Liu, Yu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A new xandarellid euarthropod from the Cambrian Chengjiang biota, Yunnan Province, China</atitle><jtitle>Geological magazine</jtitle><addtitle>Geol. Mag</addtitle><date>2019-08</date><risdate>2019</risdate><volume>156</volume><issue>8</issue><spage>1375</spage><epage>1384</epage><pages>1375-1384</pages><issn>0016-7568</issn><eissn>1469-5081</eissn><abstract>The euarthropod Luohuilinella deletres sp. nov. is described from rare material from the Chengjiang biota, Cambrian Series 2, Stage 3, of Yunnan Province, China. Phylogenetic analysis recovers a xandarellid affinity for L. deletres, representing only the fifth described species of this clade. L. deletres possesses a head shield that is about one-fifth of the total body length and a trunk with 30 tergites, the reduced anterior-most tergite and terminal three tergites lacking pleural elongations. Anteriorly situated notches in the head shield are associated with stalked eyes, in contrast to the more posterior, enclosed eye slits present in Xandarella. Posterior to the antennae there are at least 11 pairs of biramous appendages preserved, including three pairs in the head. The morphology of the midline gut of L. deletres, in which lateral, unbranched diverticula are wider towards the front of the body, is a characteristic also found in various trilobites. The dorsoventrally flattened exoskeleton suggests a benthic or nektobenthic mode of life for L. deletres, as for other trilobitomorphs, and it likely used its well-developed anteriorly positioned eyes for searching out food, either to scavenge or to find prey.</abstract><cop>Cambridge, UK</cop><pub>Cambridge University Press</pub><doi>10.1017/S0016756818000730</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Antennae Appendages Arthropoda Arthropods Asia Benthos Biota Body length Cambrian Cameras Chengjiang fauna China Exoskeleton Exoskeletons Far East Grants Head invertebrate invertebrates Laboratories Luohuilinella deletres Marine invertebrates Morphology New species new taxa Notches Original Article paleoecology Paleontology Paleozoic Phylogeny Prey Slits taxonomy Xandarellida Yunnan China |
| title | A new xandarellid euarthropod from the Cambrian Chengjiang biota, Yunnan Province, China |
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