Fish diversity of the Bear Gulch Limestone, Namurian, Lower Carboniferous of Montana, USA
Identifieur interne : 000108 ( Istex/Corpus ); précédent : 000107; suivant : 000109Fish diversity of the Bear Gulch Limestone, Namurian, Lower Carboniferous of Montana, USA
Auteurs : Richard Lund ; Cécile PoplinSource :
- Geobios [ 0016-6995 ] ; 1999.
English descriptors
- KwdEn :
- Acanthodes, Acanthodes lundi, Actinopterygian, Actinopterygians, Aire, Biodiversity, Blacktail, Body form, Body forms, Buchek, Buchek area, Calcaire, Carboniferous, Caridosuctor, Central montana, Central montana trough, Chondrichthyans, Coelacanth, Depocenter, Dicksoni, Diversity indices, Dominant elements, Dominant species, Eastern margin, Epicontinental seaway, Facies, Fauna, Faunal, Faunal continuum, Fish, Fish fauna, Forest grove, Gulch, Gulch lens, Gulch limestone, Gulch limestone lens, Heath, Heath formation, Iniop, Larval, Larval actinopterygians, Limestone, Lower carboniferous, Lund, Lundi, Margalef, Margalef index, Marginal facies, Marine, Montana, Namurian, Nord, Nord actuel, North America, Outcrop, Outcrop areas, Paleoenvironment, Place systdmatique, Poissons, Populosum, Resource utilization, Shore area, Shore depocenter, Simpson index, Simpson margalef, Southeastern region, Species diversity, Strepsodus, Taxon, Taxonomic, Transects, Western margin, Western margins, Witzke, Yogo.
- Teeft :
- Acanthodes, Acanthodes lundi, Actinopterygian, Actinopterygians, Aire, Blacktail, Body form, Body forms, Buchek, Buchek area, Calcaire, Carboniferous, Caridosuctor, Central montana, Central montana trough, Chondrichthyans, Coelacanth, Depocenter, Dicksoni, Diversity indices, Dominant elements, Dominant species, Eastern margin, Epicontinental seaway, Facies, Fauna, Faunal, Faunal continuum, Fish fauna, Forest grove, Gulch, Gulch lens, Gulch limestone, Gulch limestone lens, Heath, Heath formation, Iniop, Larval, Larval actinopterygians, Limestone, Lower carboniferous, Lund, Lundi, Margalef, Margalef index, Marginal facies, Montana, Namurian, Nord, Nord actuel, Outcrop, Outcrop areas, Place systdmatique, Poissons, Populosum, Resource utilization, Shore area, Shore depocenter, Simpson index, Simpson margalef, Southeastern region, Species diversity, Strepsodus, Taxon, Taxonomic, Transects, Western margin, Western margins, Witzke, Yogo.
Abstract
Abstract: Quarrying operations for fossil fish from the Bear Gulch Limestone (Heath Formation, Namurian,Montana, USA) have occurred from 1968 to 1997 and continue. The Bear Gulch Limestone lens (14×9 km) thins to a shore line on all edges except the buried eastern boundary, and contains an entirely marine flora and fauna. Eighty outcrops have been sampled, and 4 547 identifiable fish of 113 taxa have been recorded. This study details aspects of the diversity and distribution of the fishes of the Bear Gulch Bay analyzed on the basis of geographic areas, following facies and sedimentary criteria. The total diversity of the fish fauna is 21.08 (Simpson index) and 12.07 (Margalef index). Diversity decreases from east to west and towards the southern margin. These trends mask dramatic differences in species occurrences and dominant species in each area. The high diversity of the “Depocenter” area can be accounted for by its proximity to the mouth of the bay and access to the epicontinental seaway to the east. The southeast region is comprised of the Blacktail, Allen, and Buchek areas. Diversity declines greatly from the algae - and sponge - rich Blacktail area southwestward to the marginal Buchek area. This region contains several dominant species that are adapted to lurk in or maneuver among plants, feed from the bottom or burrow. High numbers of larval paleoniscoids and the coelacanth Caridosuctor lower the diversity of the near-shore North Shore area. The western end of the bay is dominated by Acanthodes,, scales of Listracanthus and Strepsodus,, and large cladodont sharks. Fish distributions, preliminary assessments of morphological adaptations, and facies all support the concept of a heterogeneous set of habitats within this fossil bay.
Url:
DOI: 10.1016/S0016-6995(99)80042-4
Links to Exploration step
ISTEX:0211F5B3CA37B553CE2FF190DF11351D2A5AC654Le document en format XML
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last="Poplin">Cécile Poplin</name><affiliation><mods:affiliation>Laboratoire de Paléontologie, UMR 8569 CNRS8 rue Buffon F-75005 Paris France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Geobios</title><title level="j" type="abbrev">GEOBIO</title><idno type="ISSN">0016-6995</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1999">1999</date><biblScope unit="volume">32</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="285">285</biblScope><biblScope unit="page" to="295">295</biblScope></imprint><idno type="ISSN">0016-6995</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0016-6995</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acanthodes</term><term>Acanthodes lundi</term><term>Actinopterygian</term><term>Actinopterygians</term><term>Aire</term><term>Biodiversity</term><term>Blacktail</term><term>Body 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actuel</term><term>Outcrop</term><term>Outcrop areas</term><term>Place systdmatique</term><term>Poissons</term><term>Populosum</term><term>Resource utilization</term><term>Shore area</term><term>Shore depocenter</term><term>Simpson index</term><term>Simpson margalef</term><term>Southeastern region</term><term>Species diversity</term><term>Strepsodus</term><term>Taxon</term><term>Taxonomic</term><term>Transects</term><term>Western margin</term><term>Western margins</term><term>Witzke</term><term>Yogo</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Quarrying operations for fossil fish from the Bear Gulch Limestone (Heath Formation, Namurian,Montana, USA) have occurred from 1968 to 1997 and continue. The Bear Gulch Limestone lens (14×9 km) thins to a shore line on all edges except the buried eastern boundary, and contains an entirely marine flora and fauna. Eighty outcrops have been sampled, and 4 547 identifiable fish of 113 taxa have been recorded. This study details aspects of the diversity and distribution of the fishes of the Bear Gulch Bay analyzed on the basis of geographic areas, following facies and sedimentary criteria. The total diversity of the fish fauna is 21.08 (Simpson index) and 12.07 (Margalef index). Diversity decreases from east to west and towards the southern margin. These trends mask dramatic differences in species occurrences and dominant species in each area. The high diversity of the “Depocenter” area can be accounted for by its proximity to the mouth of the bay and access to the epicontinental seaway to the east. The southeast region is comprised of the Blacktail, Allen, and Buchek areas. Diversity declines greatly from the algae - and sponge - rich Blacktail area southwestward to the marginal Buchek area. This region contains several dominant species that are adapted to lurk in or maneuver among plants, feed from the bottom or burrow. High numbers of larval paleoniscoids and the coelacanth Caridosuctor lower the diversity of the near-shore North Shore area. The western end of the bay is dominated by Acanthodes,, scales of Listracanthus and Strepsodus,, and large cladodont sharks. Fish distributions, preliminary assessments of morphological adaptations, and facies all support the concept of a heterogeneous set of habitats within this fossil bay.</div></front></TEI><istex><corpusName>elsevier</corpusName><keywords><teeft><json:string>gulch</json:string><json:string>limestone</json:string><json:string>gulch limestone</json:string><json:string>actinopterygians</json:string><json:string>facies</json:string><json:string>coelacanth</json:string><json:string>outcrop</json:string><json:string>taxon</json:string><json:string>buchek</json:string><json:string>larval 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comparées</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Biodiversity</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Fish</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Marine</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Carboniferous</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Paleoenvironment</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>North America</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Biodiversité</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Poissons</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Marin</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Carbonifère</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Paléoenvironnement</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Amérique du nord</value></json:item></subject><articleId><json:string>99800424</json:string></articleId><arkIstex>ark:/67375/6H6-MP6QT861-T</arkIstex><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Abstract: Quarrying operations for fossil fish from the Bear Gulch Limestone (Heath Formation, Namurian,Montana, USA) have occurred from 1968 to 1997 and continue. The Bear Gulch Limestone lens (14×9 km) thins to a shore line on all edges except the buried eastern boundary, and contains an entirely marine flora and fauna. Eighty outcrops have been sampled, and 4 547 identifiable fish of 113 taxa have been recorded. This study details aspects of the diversity and distribution of the fishes of the Bear Gulch Bay analyzed on the basis of geographic areas, following facies and sedimentary criteria. The total diversity of the fish fauna is 21.08 (Simpson index) and 12.07 (Margalef index). Diversity decreases from east to west and towards the southern margin. These trends mask dramatic differences in species occurrences and dominant species in each area. The high diversity of the “Depocenter” area can be accounted for by its proximity to the mouth of the bay and access to the epicontinental seaway to the east. The southeast region is comprised of the Blacktail, Allen, and Buchek areas. Diversity declines greatly from the algae - and sponge - rich Blacktail area southwestward to the marginal Buchek area. This region contains several dominant species that are adapted to lurk in or maneuver among plants, feed from the bottom or burrow. High numbers of larval paleoniscoids and the coelacanth Caridosuctor lower the diversity of the near-shore North Shore area. The western end of the bay is dominated by Acanthodes,, scales of Listracanthus and Strepsodus,, and large cladodont sharks. Fish distributions, preliminary assessments of morphological adaptations, and facies all support the concept of a heterogeneous set of habitats within this fossil bay.</abstract><qualityIndicators><refBibsNative>true</refBibsNative><abstractWordCount>278</abstractWordCount><abstractCharCount>1766</abstractCharCount><keywordCount>13</keywordCount><score>10</score><pdfWordCount>5931</pdfWordCount><pdfCharCount>35602</pdfCharCount><pdfVersion>1.3</pdfVersion><pdfPageCount>11</pdfPageCount><pdfPageSize>591 x 756 pts</pdfPageSize></qualityIndicators><title>Fish diversity of the Bear Gulch Limestone, Namurian, Lower Carboniferous of Montana, USA</title><pii><json:string>S0016-6995(99)80042-4</json:string></pii><genre><json:string>research-article</json:string></genre><host><title>Geobios</title><language><json:string>unknown</json:string></language><publicationDate>1999</publicationDate><issn><json:string>0016-6995</json:string></issn><pii><json:string>S0016-6995(00)X0145-3</json:string></pii><volume>32</volume><issue>2</issue><pages><first>285</first><last>295</last></pages><genre><json:string>journal</json:string></genre></host><namedEntities><unitex><date><json:string>1999</json:string></date><geogName></geogName><orgName></orgName><orgName_funder></orgName_funder><orgName_provider></orgName_provider><persName><json:string>Long Pelvic</json:string><json:string>Eileen Grogan</json:string><json:string>Allen Blacktail</json:string><json:string>Rose Canyon</json:string><json:string>Henri Lavina</json:string><json:string>Pacific Ocean</json:string><json:string>Ron Bogosh</json:string><json:string>Bill Hopkins</json:string><json:string>Bradley Dyne</json:string><json:string>Myra Moore</json:string><json:string>Carol DeBell</json:string></persName><placeName><json:string>Lund</json:string><json:string>Pittsburgh</json:string><json:string>Montana</json:string><json:string>Canada</json:string><json:string>American</json:string><json:string>AMERICA</json:string></placeName><ref_url></ref_url><ref_bibl><json:string>Lund et al. 1993</json:string><json:string>Henderson & Seaby 1997</json:string><json:string>Rigby 1985</json:string><json:string>Webb 1984</json:string><json:string>After Witzke 1990</json:string><json:string>Allenypterus montanus LUND & LUND, 1984</json:string><json:string>Lund & Grogan 1997</json:string><json:string>Schoener 1974</json:string><json:string>Horner & Lund 1985</json:string><json:string>Schultze and Maples (1992)</json:string><json:string>Pianka 1994</json:string><json:string>Lund & Lund 1984</json:string><json:string>Lund et al. 1985</json:string><json:string>Horner 1985</json:string><json:string>Lund 1990</json:string><json:string>Witzke 1990</json:string><json:string>Zidek 1980</json:string><json:string>Williams 1983</json:string><json:string>Feldman et al. 1994</json:string><json:string>Lurid 1990</json:string><json:string>Lurid et al. 1993</json:string><json:string>Lund & Poplin 1997</json:string></ref_bibl><bibl></bibl></unitex></namedEntities><ark><json:string>ark:/67375/6H6-MP6QT861-T</json:string></ark><categories><wos><json:string>1 - science</json:string><json:string>2 - paleontology</json:string></wos><scienceMetrix><json:string>1 - natural sciences</json:string><json:string>2 - earth & environmental sciences</json:string><json:string>3 - paleontology</json:string></scienceMetrix><scopus><json:string>1 - Physical Sciences</json:string><json:string>2 - Earth and Planetary Sciences</json:string><json:string>3 - Space and Planetary Science</json:string><json:string>1 - Physical Sciences</json:string><json:string>2 - Earth and Planetary Sciences</json:string><json:string>3 - Stratigraphy</json:string></scopus><inist><json:string>1 - sciences appliquees, technologies et medecines</json:string><json:string>2 - sciences biologiques et medicales</json:string><json:string>3 - sciences biologiques fondamentales et appliquees. psychologie</json:string><json:string>4 - vertebres: systeme osteoarticulaire, muscle strie</json:string></inist></categories><publicationDate>1999</publicationDate><copyrightDate>1999</copyrightDate><doi><json:string>10.1016/S0016-6995(99)80042-4</json:string></doi><id>0211F5B3CA37B553CE2FF190DF11351D2A5AC654</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/0211F5B3CA37B553CE2FF190DF11351D2A5AC654/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/0211F5B3CA37B553CE2FF190DF11351D2A5AC654/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/0211F5B3CA37B553CE2FF190DF11351D2A5AC654/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Fish diversity of the Bear Gulch Limestone, Namurian, Lower Carboniferous of Montana, USA</title><title level="a" type="alt" xml:lang="fr">La diversité des poissons de Bear Gulch, Namurien, Carbonifère inférieur du Montana, USA</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>ELSEVIER</p></availability><date>1999</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Fish diversity of the Bear Gulch Limestone, Namurian, Lower Carboniferous of Montana, USA</title><title level="a" type="alt" xml:lang="fr">La diversité des poissons de Bear Gulch, Namurien, Carbonifère inférieur du Montana, USA</title><author xml:id="author-0000"><persName><forename type="first">Richard</forename><surname>Lund</surname></persName><email>lund@panther.adelphi.edu</email><affiliation>Biology Department, Adelphi University Garden City New York 11530, U.S.A.</affiliation></author><author xml:id="author-0001"><persName><forename type="first">Cécile</forename><surname>Poplin</surname></persName><affiliation>Laboratoire de Paléontologie, UMR 8569 CNRS8 rue Buffon F-75005 Paris France</affiliation></author><idno type="istex">0211F5B3CA37B553CE2FF190DF11351D2A5AC654</idno><idno type="DOI">10.1016/S0016-6995(99)80042-4</idno><idno type="PII">S0016-6995(99)80042-4</idno><idno type="ArticleID">99800424</idno></analytic><monogr><title level="j">Geobios</title><title level="j" type="abbrev">GEOBIO</title><idno type="pISSN">0016-6995</idno><idno type="PII">S0016-6995(00)X0145-3</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1999"></date><biblScope unit="volume">32</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="285">285</biblScope><biblScope unit="page" to="295">295</biblScope></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1999</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Abstract: Quarrying operations for fossil fish from the Bear Gulch Limestone (Heath Formation, Namurian,Montana, USA) have occurred from 1968 to 1997 and continue. The Bear Gulch Limestone lens (14×9 km) thins to a shore line on all edges except the buried eastern boundary, and contains an entirely marine flora and fauna. Eighty outcrops have been sampled, and 4 547 identifiable fish of 113 taxa have been recorded. This study details aspects of the diversity and distribution of the fishes of the Bear Gulch Bay analyzed on the basis of geographic areas, following facies and sedimentary criteria. The total diversity of the fish fauna is 21.08 (Simpson index) and 12.07 (Margalef index). Diversity decreases from east to west and towards the southern margin. These trends mask dramatic differences in species occurrences and dominant species in each area. The high diversity of the “Depocenter” area can be accounted for by its proximity to the mouth of the bay and access to the epicontinental seaway to the east. The southeast region is comprised of the Blacktail, Allen, and Buchek areas. Diversity declines greatly from the algae - and sponge - rich Blacktail area southwestward to the marginal Buchek area. This region contains several dominant species that are adapted to lurk in or maneuver among plants, feed from the bottom or burrow. High numbers of larval paleoniscoids and the coelacanth Caridosuctor lower the diversity of the near-shore North Shore area. The western end of the bay is dominated by Acanthodes,, scales of Listracanthus and Strepsodus,, and large cladodont sharks. Fish distributions, preliminary assessments of morphological adaptations, and facies all support the concept of a heterogeneous set of habitats within this fossil bay.</p></abstract><abstract xml:lang="fr"><p>Résumé: Des poissons fossiles ont été récoltés de 1968 à 1997 (et continuent de l'être) dans le Calcaire de BearGulch (Formation de Heath, Namurien, Montana, USA). La lentille de calcaire (14×9 km) s'amincit jusqu'à une ligne de rivage sur tout son pourtour, sauf le long de sa limite est qui est enfouie. Elle contient une flore et une faune entièrement marines. Quatre - vingt affleurements ont été échantillonnés et 4 547 poissons identifiables appartenant à 113 taxons ont été enregistrés. Les données sur la répartition des poissons ont été analysées par aires géographiques définies en fonction de critères sédimentaires et de faciès. La présente étude détaille les aspects de la diversité des poissons de la Baie de Bear Gulch. La diversité totale de la faune ichthyologique est 21,08 (indice de Simpson) et 12,07 (indice de Margalef). La diversité décroît d'Est en Ouest et vers la marge sud. Ces gradients masquent des différences importantes dans la répartition des espèces, en particulier des espèces dominantes, dans chaque aire géographique. La forte diversité du “Depocenter” peut être expliquée par sa proximité du débouché de la baie sur le chenal épicontinental vers l'Est. La région du Sud-Est comprend les aires de Blacktail, Allen et Buchek: depuis Blacktail, riche en algues et éponges, la diversité décroît fortement en direction du Sud-Est jusqu'à l'aire marginale de Buchek. Cette région comporte plusieurs espèces dominantes qui sont adaptées pour s'embusquer ou manoeuvrer parmi les plantes, ou encore fouir le fond pour chercher leur nourriture ou s'enfouir. Dans l'aire de North Shore, près du rivage, le grand nombre de larves de paléoniscoïdes et du coelacanthe Caridosuctor font baisser la diversité. L'extrémité ouest de la baie est dominée par Acanthodes,, les écailles de Listracanthus et de Strepsodus et de grands requins cladodontes. Les répartitions des poissons, les estimations préliminaires sur les adaptations morphologiques, et enfin les facies étayent tous le concept d'une série hétérogène d'habitats dans cette baie fossile.</p></abstract><textClass><keywords scheme="keyword"><list><head>article-category</head><item><term>Paléodiversifications: terres et mers comparées</term></item></list></keywords></textClass><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Biodiversity</term></item><item><term>Fish</term></item><item><term>Marine</term></item><item><term>Carboniferous</term></item><item><term>Paleoenvironment</term></item><item><term>North America</term></item></list></keywords></textClass><textClass xml:lang="fr"><keywords scheme="keyword"><list><head>Mots-Clés</head><item><term>Biodiversité</term></item><item><term>Poissons</term></item><item><term>Marin</term></item><item><term>Carbonifère</term></item><item><term>Paléoenvironnement</term></item><item><term>Amérique du nord</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1999">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/0211F5B3CA37B553CE2FF190DF11351D2A5AC654/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier doc found" wicri:toSee="Elsevier, no converted or simple article"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 5.0.1//EN//XML" URI="art501.dtd" name="istex:docType"></istex:docType><istex:document><article version="5.0" xml:lang="en" docsubtype="fla"><item-info><jid>GEOBIO</jid><aid>99800424</aid><ce:pii>S0016-6995(99)80042-4</ce:pii><ce:doi>10.1016/S0016-6995(99)80042-4</ce:doi><ce:copyright type="unknown" year="1999"></ce:copyright><ce:doctopics><ce:doctopic><ce:text>Paléodiversifications: terres et mers comparées</ce:text></ce:doctopic></ce:doctopics></item-info><head><ce:title>Fish diversity of the Bear Gulch Limestone, Namurian, Lower Carboniferous of Montana, USA</ce:title><ce:alt-title xml:lang="fr">La diversité des poissons de Bear Gulch, Namurien, Carbonifère inférieur du Montana, USA</ce:alt-title><ce:author-group><ce:author><ce:given-name>Richard</ce:given-name><ce:surname>Lund</ce:surname><ce:cross-ref refid="aff1"><ce:sup>a</ce:sup></ce:cross-ref><ce:e-address type="email">lund@panther.adelphi.edu</ce:e-address></ce:author><ce:author><ce:given-name>Cécile</ce:given-name><ce:surname>Poplin</ce:surname><ce:cross-ref refid="aff2"><ce:sup>b</ce:sup></ce:cross-ref></ce:author><ce:affiliation id="aff1"><ce:label>a</ce:label><ce:textfn>Biology Department, Adelphi University Garden City New York 11530, U.S.A.</ce:textfn></ce:affiliation><ce:affiliation id="aff2"><ce:label>b</ce:label><ce:textfn>Laboratoire de Paléontologie, UMR 8569 CNRS8 rue Buffon F-75005 Paris France</ce:textfn></ce:affiliation></ce:author-group><ce:date-received day="25" month="8" year="1998"></ce:date-received><ce:date-accepted day="19" month="10" year="1998"></ce:date-accepted><ce:abstract id="ab1" class="author" xml:lang="en"><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>Quarrying operations for fossil fish from the Bear Gulch Limestone (Heath Formation, Namurian,Montana, USA) have occurred from 1968 to 1997 and continue. The Bear Gulch Limestone lens (14×9 km) thins to a shore line on all edges except the buried eastern boundary, and contains an entirely marine flora and fauna. Eighty outcrops have been sampled, and 4 547 identifiable fish of 113 taxa have been recorded. This study details aspects of the diversity and distribution of the fishes of the Bear Gulch Bay analyzed on the basis of geographic areas, following facies and sedimentary criteria. The total diversity of the fish fauna is 21.08 (Simpson index) and 12.07 (Margalef index). Diversity decreases from east to west and towards the southern margin. These trends mask dramatic differences in species occurrences and dominant species in each area. The high diversity of the “Depocenter” area can be accounted for by its proximity to the mouth of the bay and access to the epicontinental seaway to the east. The southeast region is comprised of the Blacktail, Allen, and Buchek areas. Diversity declines greatly from the algae - and sponge - rich Blacktail area southwestward to the marginal Buchek area. This region contains several dominant species that are adapted to lurk in or maneuver among plants, feed from the bottom or burrow. High numbers of larval paleoniscoids and the coelacanth <ce:italic>Caridosuctor</ce:italic> lower the diversity of the near-shore North Shore area. The western end of the bay is dominated by <ce:italic>Acanthodes</ce:italic>,, scales of <ce:italic>Listracanthus</ce:italic> and <ce:italic>Strepsodus</ce:italic>,, and large cladodont sharks. Fish distributions, preliminary assessments of morphological adaptations, and facies all support the concept of a heterogeneous set of habitats within this fossil bay.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract id="ab2" class="author" xml:lang="fr"><ce:section-title>Résumé</ce:section-title><ce:abstract-sec><ce:simple-para>Des poissons fossiles ont été récoltés de 1968 à 1997 (et continuent de l'être) dans le Calcaire de BearGulch (Formation de Heath, Namurien, Montana, USA). La lentille de calcaire (14×9 km) s'amincit jusqu'à une ligne de rivage sur tout son pourtour, sauf le long de sa limite est qui est enfouie. Elle contient une flore et une faune entièrement marines. Quatre - vingt affleurements ont été échantillonnés et 4 547 poissons identifiables appartenant à 113 taxons ont été enregistrés. Les données sur la répartition des poissons ont été analysées par aires géographiques définies en fonction de critères sédimentaires et de faciès. La présente étude détaille les aspects de la diversité des poissons de la Baie de Bear Gulch. La diversité totale de la faune ichthyologique est 21,08 (indice de Simpson) et 12,07 (indice de Margalef). La diversité décroît d'Est en Ouest et vers la marge sud. Ces gradients masquent des différences importantes dans la répartition des espèces, en particulier des espèces dominantes, dans chaque aire géographique. La forte diversité du “Depocenter” peut être expliquée par sa proximité du débouché de la baie sur le chenal épicontinental vers l'Est. La région du Sud-Est comprend les aires de Blacktail, Allen et Buchek: depuis Blacktail, riche en algues et éponges, la diversité décroît fortement en direction du Sud-Est jusqu'à l'aire marginale de Buchek. Cette région comporte plusieurs espèces dominantes qui sont adaptées pour s'embusquer ou manoeuvrer parmi les plantes, ou encore fouir le fond pour chercher leur nourriture ou s'enfouir. Dans l'aire de North Shore, près du rivage, le grand nombre de larves de paléoniscoïdes et du coelacanthe <ce:italic>Caridosuctor</ce:italic> font baisser la diversité. L'extrémité ouest de la baie est dominée par <ce:italic>Acanthodes</ce:italic>,, les écailles de <ce:italic>Listracanthus</ce:italic> et de <ce:italic>Strepsodus</ce:italic> et de grands requins cladodontes. Les répartitions des poissons, les estimations préliminaires sur les adaptations morphologiques, et enfin les facies étayent tous le concept d'une série hétérogène d'habitats dans cette baie fossile.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword" xml:lang="en"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Biodiversity</ce:text></ce:keyword><ce:keyword><ce:text>Fish</ce:text></ce:keyword><ce:keyword><ce:text>Marine</ce:text></ce:keyword><ce:keyword><ce:text>Carboniferous</ce:text></ce:keyword><ce:keyword><ce:text>Paleoenvironment</ce:text></ce:keyword><ce:keyword><ce:text>North America</ce:text></ce:keyword></ce:keywords><ce:keywords class="keyword" xml:lang="fr"><ce:section-title>Mots-Clés</ce:section-title><ce:keyword><ce:text>Biodiversité</ce:text></ce:keyword><ce:keyword><ce:text>Poissons</ce:text></ce:keyword><ce:keyword><ce:text>Marin</ce:text></ce:keyword><ce:keyword><ce:text>Carbonifère</ce:text></ce:keyword><ce:keyword><ce:text>Paléoenvironnement</ce:text></ce:keyword><ce:keyword><ce:text>Amérique du nord</ce:text></ce:keyword></ce:keywords></head><tail><ce:bibliography><ce:section-title>References</ce:section-title><ce:bibliography-sec><ce:bib-reference id="bib1"><ce:label>Feldman, et al, 1994</ce:label><sb:reference><sb:contribution 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de Stratigraphie et de Géologie du Carbonifère</sb:maintitle></sb:title><sb:conference>Urbana (Illinois)</sb:conference><sb:date>1985</sb:date></sb:edited-book><sb:pages><sb:first-page>427</sb:first-page><sb:last-page>436</sb:last-page></sb:pages></sb:host></sb:reference></ce:bib-reference><ce:bib-reference id="bib4"><ce:label>Horner and Lund, 1985</ce:label><sb:reference><sb:contribution langtype="en"><sb:authors><sb:author><ce:surname>Horner</ce:surname><ce:given-name>J.R.</ce:given-name></sb:author><sb:author><ce:surname>Lund</ce:surname><ce:given-name>R.</ce:given-name></sb:author></sb:authors><sb:title><sb:maintitle>Biotic distribution and diversity in the Bear Gulch limestone</sb:maintitle></sb:title></sb:contribution><sb:host><sb:edited-book><sb:title><sb:maintitle>Comptes Rendus Neuvième Congrès International de Stratigraphie et de Géologie du Carbonifère</sb:maintitle></sb:title><sb:conference>Urbana 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The Bear Gulch Limestone lens (14×9 km) thins to a shore line on all edges except the buried eastern boundary, and contains an entirely marine flora and fauna. Eighty outcrops have been sampled, and 4 547 identifiable fish of 113 taxa have been recorded. This study details aspects of the diversity and distribution of the fishes of the Bear Gulch Bay analyzed on the basis of geographic areas, following facies and sedimentary criteria. The total diversity of the fish fauna is 21.08 (Simpson index) and 12.07 (Margalef index). Diversity decreases from east to west and towards the southern margin. These trends mask dramatic differences in species occurrences and dominant species in each area. The high diversity of the “Depocenter” area can be accounted for by its proximity to the mouth of the bay and access to the epicontinental seaway to the east. The southeast region is comprised of the Blacktail, Allen, and Buchek areas. Diversity declines greatly from the algae - and sponge - rich Blacktail area southwestward to the marginal Buchek area. This region contains several dominant species that are adapted to lurk in or maneuver among plants, feed from the bottom or burrow. High numbers of larval paleoniscoids and the coelacanth Caridosuctor lower the diversity of the near-shore North Shore area. The western end of the bay is dominated by Acanthodes,, scales of Listracanthus and Strepsodus,, and large cladodont sharks. Fish distributions, preliminary assessments of morphological adaptations, and facies all support the concept of a heterogeneous set of habitats within this fossil bay.</abstract><abstract lang="fr">Résumé: Des poissons fossiles ont été récoltés de 1968 à 1997 (et continuent de l'être) dans le Calcaire de BearGulch (Formation de Heath, Namurien, Montana, USA). La lentille de calcaire (14×9 km) s'amincit jusqu'à une ligne de rivage sur tout son pourtour, sauf le long de sa limite est qui est enfouie. Elle contient une flore et une faune entièrement marines. Quatre - vingt affleurements ont été échantillonnés et 4 547 poissons identifiables appartenant à 113 taxons ont été enregistrés. Les données sur la répartition des poissons ont été analysées par aires géographiques définies en fonction de critères sédimentaires et de faciès. La présente étude détaille les aspects de la diversité des poissons de la Baie de Bear Gulch. La diversité totale de la faune ichthyologique est 21,08 (indice de Simpson) et 12,07 (indice de Margalef). La diversité décroît d'Est en Ouest et vers la marge sud. Ces gradients masquent des différences importantes dans la répartition des espèces, en particulier des espèces dominantes, dans chaque aire géographique. La forte diversité du “Depocenter” peut être expliquée par sa proximité du débouché de la baie sur le chenal épicontinental vers l'Est. La région du Sud-Est comprend les aires de Blacktail, Allen et Buchek: depuis Blacktail, riche en algues et éponges, la diversité décroît fortement en direction du Sud-Est jusqu'à l'aire marginale de Buchek. Cette région comporte plusieurs espèces dominantes qui sont adaptées pour s'embusquer ou manoeuvrer parmi les plantes, ou encore fouir le fond pour chercher leur nourriture ou s'enfouir. Dans l'aire de North Shore, près du rivage, le grand nombre de larves de paléoniscoïdes et du coelacanthe Caridosuctor font baisser la diversité. L'extrémité ouest de la baie est dominée par Acanthodes,, les écailles de Listracanthus et de Strepsodus et de grands requins cladodontes. Les répartitions des poissons, les estimations préliminaires sur les adaptations morphologiques, et enfin les facies étayent tous le concept d'une série hétérogène d'habitats dans cette baie fossile.</abstract><subject><genre>article-category</genre><topic>Paléodiversifications: terres et mers comparées</topic></subject><subject lang="en"><genre>Keywords</genre><topic>Biodiversity</topic><topic>Fish</topic><topic>Marine</topic><topic>Carboniferous</topic><topic>Paleoenvironment</topic><topic>North America</topic></subject><subject lang="fr"><genre>Mots-Clés</genre><topic>Biodiversité</topic><topic>Poissons</topic><topic>Marin</topic><topic>Carbonifère</topic><topic>Paléoenvironnement</topic><topic>Amérique du nord</topic></subject><relatedItem type="host"><titleInfo><title>Geobios</title></titleInfo><titleInfo type="abbreviated"><title>GEOBIO</title></titleInfo><genre type="journal" authority="ISTEX" authorityURI="https://publication-type.data.istex.fr" valueURI="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1999</dateIssued></originInfo><identifier type="ISSN">0016-6995</identifier><identifier type="PII">S0016-6995(00)X0145-3</identifier><part><date>1999</date><detail type="volume"><number>32</number><caption>vol.</caption></detail><detail type="issue"><number>2</number><caption>no.</caption></detail><extent unit="issue-pages"><start>129</start><end>364</end></extent><extent unit="pages"><start>285</start><end>295</end></extent></part></relatedItem><identifier type="istex">0211F5B3CA37B553CE2FF190DF11351D2A5AC654</identifier><identifier type="ark">ark:/67375/6H6-MP6QT861-T</identifier><identifier type="DOI">10.1016/S0016-6995(99)80042-4</identifier><identifier type="PII">S0016-6995(99)80042-4</identifier><identifier type="ArticleID">99800424</identifier><recordInfo><recordContentSource authority="ISTEX" authorityURI="https://loaded-corpus.data.istex.fr" valueURI="https://loaded-corpus.data.istex.fr/ark:/67375/XBH-HKKZVM7B-M">elsevier</recordContentSource></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/0211F5B3CA37B553CE2FF190DF11351D2A5AC654/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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