Actinopterygians from the Namurian of Bearsden, Scotland, with comments on early actinopterygian neurocrania
Identifieur interne : 000E12 ( Istex/Corpus ); précédent : 000E11; suivant : 000E13Actinopterygians from the Namurian of Bearsden, Scotland, with comments on early actinopterygian neurocrania
Auteurs : M. I. CoatesSource :
- Zoological Journal of the Linnean Society [ 0024-4082 ] ; 1998.
English descriptors
Abstract
Two new stem-actinopterans,Melanecta anneaegen.etsp. nov.andWoodichthys bearsdenigen.etsp. nov., are described from the Manse Burn Formation (basal Namurian) of Bearsden, Glasgow.Melanectaresembles Devonian taxa such asHowqualepisandMimia. Significant features include a large head, long gape, well preserved otoliths, micromeric squamation, broad-based fins, and fringing fulcra restricted to the extended leading pectoral edge. New data onErpetoichthysotoliths are presented for comparison with those ofMelanectaand other early actinopterygians. The primitive actinopterygian condition probably includes partly vateritic otoliths, with a small sagitta and large asteriscus contained within a single chamber. The small scales ofMelanectamay be a primitive characteristic, but the apparent independence of factors such as size, histology, and scale row to somite ratios, obscures clear evolutionary trends.WoodichthysresemblesMoythomasiaandKentuckia, and includes a flattened but detailed neurocranium. A new neurocranial specimen ofPteronisculus magnusexamined for comparison reveals new data on the otic labyrinth, lateral cranial canals, and postorbital wall. Haemopoietic organ accommodation is considered insufficient explanation for lateral cranial canal elaboration. Several new basisphenoidal and postorbital wall characters are identified which are associated with early stages in posterior myodome evolution. Most of these characters are present inMoythomasia durgaringa.
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DOI: 10.1006/zjls.1997.0113
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Coates</name><affiliation><mods:affiliation>Department of Biological Sciences, University College London, Gower St. London, WC1E 6BT</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:ED0D497D1ADE59CE97DB94091BE28EF43684D5E3</idno><date when="1998" year="1998">1998</date><idno type="doi">10.1006/zjls.1997.0113</idno><idno type="url">https://api.istex.fr/document/ED0D497D1ADE59CE97DB94091BE28EF43684D5E3/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000E12</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000E12</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Actinopterygians from the Namurian of Bearsden, Scotland, with comments on early actinopterygian neurocrania</title><author><name sortKey="Coates, M I" sort="Coates, M I" uniqKey="Coates M" first="M. I." last="Coates">M. I. 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Significant features include a large head, long gape, well preserved otoliths, micromeric squamation, broad-based fins, and fringing fulcra restricted to the extended leading pectoral edge. New data onErpetoichthysotoliths are presented for comparison with those ofMelanectaand other early actinopterygians. The primitive actinopterygian condition probably includes partly vateritic otoliths, with a small sagitta and large asteriscus contained within a single chamber. The small scales ofMelanectamay be a primitive characteristic, but the apparent independence of factors such as size, histology, and scale row to somite ratios, obscures clear evolutionary trends.WoodichthysresemblesMoythomasiaandKentuckia, and includes a flattened but detailed neurocranium. A new neurocranial specimen ofPteronisculus magnusexamined for comparison reveals new data on the otic labyrinth, lateral cranial canals, and postorbital wall. Haemopoietic organ accommodation is considered insufficient explanation for lateral cranial canal elaboration. Several new basisphenoidal and postorbital wall characters are identified which are associated with early stages in posterior myodome evolution. Most of these characters are present inMoythomasia durgaringa.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>M.I. 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New data onErpetoichthysotoliths are presented for comparison with those ofMelanectaand other early actinopterygians. The primitive actinopterygian condition probably includes partly vateritic otoliths, with a small sagitta and large asteriscus contained within a single chamber. The small scales ofMelanectamay be a primitive characteristic, but the apparent independence of factors such as size, histology, and scale row to somite ratios, obscures clear evolutionary trends.WoodichthysresemblesMoythomasiaandKentuckia, and includes a flattened but detailed neurocranium. A new neurocranial specimen ofPteronisculus magnusexamined for comparison reveals new data on the otic labyrinth, lateral cranial canals, and postorbital wall. Haemopoietic organ accommodation is considered insufficient explanation for lateral cranial canal elaboration. Several new basisphenoidal and postorbital wall characters are identified which are associated with early stages in posterior myodome evolution. 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Significant features include a large head, long gape, well preserved otoliths, micromeric squamation, broad-based fins, and fringing fulcra restricted to the extended leading pectoral edge. New data onErpetoichthysotoliths are presented for comparison with those ofMelanectaand other early actinopterygians. The primitive actinopterygian condition probably includes partly vateritic otoliths, with a small sagitta and large asteriscus contained within a single chamber. The small scales ofMelanectamay be a primitive characteristic, but the apparent independence of factors such as size, histology, and scale row to somite ratios, obscures clear evolutionary trends.WoodichthysresemblesMoythomasiaandKentuckia, and includes a flattened but detailed neurocranium. A new neurocranial specimen ofPteronisculus magnusexamined for comparison reveals new data on the otic labyrinth, lateral cranial canals, and postorbital wall. Haemopoietic organ accommodation is considered insufficient explanation for lateral cranial canal elaboration. Several new basisphenoidal and postorbital wall characters are identified which are associated with early stages in posterior myodome evolution. Most of these characters are present inMoythomasia durgaringa.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Actinopterygii – morphology – neurocranium – otoliths – phylogeny –Pteronisculus.</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1998">Published</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2016-11-20">References added</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2017-01-13">References added</change><change xml:id="refBibs-istex" who="#ISTEX-API" when="2017-01-16">References added</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/ED0D497D1ADE59CE97DB94091BE28EF43684D5E3/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier converted-article found"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>YZJLS</jid><aid>90113</aid><ce:pii>S0024-4082(97)90113-8</ce:pii><ce:doi>10.1006/zjls.1997.0113</ce:doi><ce:copyright type="society" year="1998">The Linnean Society of London</ce:copyright></item-info><head><ce:dochead><ce:textfn>Regular Article</ce:textfn></ce:dochead><ce:title>Actinopterygians from the Namurian of Bearsden, Scotland, with comments on early actinopterygian neurocrania</ce:title><ce:author-group><ce:author><ce:given-name>M.I.</ce:given-name><ce:surname>COATES</ce:surname><ce:degrees>FLS</ce:degrees></ce:author><ce:affiliation><ce:textfn>Department of Biological Sciences, University College London, Gower St. London, WC1E 6BT</ce:textfn></ce:affiliation></ce:author-group><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>Two new stem-actinopterans,<ce:bold><ce:italic>Melanecta anneae</ce:italic></ce:bold>gen.<ce:italic>et</ce:italic><ce:bold>sp. nov.</ce:bold>and<ce:bold><ce:italic>Woodichthys bearsdeni</ce:italic></ce:bold>gen.<ce:italic>et</ce:italic><ce:bold>sp. nov.</ce:bold>, are described from the Manse Burn Formation (basal Namurian) of Bearsden, Glasgow.<ce:italic>Melanecta</ce:italic>resembles Devonian taxa such as<ce:italic>Howqualepis</ce:italic>and<ce:italic>Mimia</ce:italic>. Significant features include a large head, long gape, well preserved otoliths, micromeric squamation, broad-based fins, and fringing fulcra restricted to the extended leading pectoral edge. New data on<ce:italic>Erpetoichthys</ce:italic>otoliths are presented for comparison with those of<ce:italic>Melanecta</ce:italic>and other early actinopterygians. The primitive actinopterygian condition probably includes partly vateritic otoliths, with a small sagitta and large asteriscus contained within a single chamber. The small scales of<ce:italic>Melanecta</ce:italic>may be a primitive characteristic, but the apparent independence of factors such as size, histology, and scale row to somite ratios, obscures clear evolutionary trends.<ce:italic>Woodichthys</ce:italic>resembles<ce:italic>Moythomasia</ce:italic>and<ce:italic>Kentuckia</ce:italic>, and includes a flattened but detailed neurocranium. A new neurocranial specimen of<ce:italic>Pteronisculus magnus</ce:italic>examined for comparison reveals new data on the otic labyrinth, lateral cranial canals, and postorbital wall. Haemopoietic organ accommodation is considered insufficient explanation for lateral cranial canal elaboration. Several new basisphenoidal and postorbital wall characters are identified which are associated with early stages in posterior myodome evolution. Most of these characters are present in<ce:italic>Moythomasia durgaringa</ce:italic>.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Actinopterygii – morphology – neurocranium – otoliths – phylogeny –<ce:italic>Pteronisculus</ce:italic>.</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Actinopterygians from the Namurian of Bearsden, Scotland, with comments on early actinopterygian neurocrania</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Actinopterygians from the Namurian of Bearsden, Scotland, with comments on early actinopterygian neurocrania</title></titleInfo><name type="personal"><namePart type="given">M.I.</namePart><namePart type="family">COATES</namePart><namePart type="termsOfAddress">FLS</namePart><affiliation>Department of Biological Sciences, University College London, Gower St. London, WC1E 6BT</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1998</dateIssued><copyrightDate encoding="w3cdtf">1998</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Two new stem-actinopterans,Melanecta anneaegen.etsp. nov.andWoodichthys bearsdenigen.etsp. nov., are described from the Manse Burn Formation (basal Namurian) of Bearsden, Glasgow.Melanectaresembles Devonian taxa such asHowqualepisandMimia. Significant features include a large head, long gape, well preserved otoliths, micromeric squamation, broad-based fins, and fringing fulcra restricted to the extended leading pectoral edge. New data onErpetoichthysotoliths are presented for comparison with those ofMelanectaand other early actinopterygians. The primitive actinopterygian condition probably includes partly vateritic otoliths, with a small sagitta and large asteriscus contained within a single chamber. The small scales ofMelanectamay be a primitive characteristic, but the apparent independence of factors such as size, histology, and scale row to somite ratios, obscures clear evolutionary trends.WoodichthysresemblesMoythomasiaandKentuckia, and includes a flattened but detailed neurocranium. A new neurocranial specimen ofPteronisculus magnusexamined for comparison reveals new data on the otic labyrinth, lateral cranial canals, and postorbital wall. Haemopoietic organ accommodation is considered insufficient explanation for lateral cranial canal elaboration. Several new basisphenoidal and postorbital wall characters are identified which are associated with early stages in posterior myodome evolution. 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