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<document id= "7AB439359775983B383CCD06DB898227" ID-DOI= "10.1590/1982-0224-2021-0009" ID-ISSN= "1982-0224" ID-Zenodo-Dep= "13332563" IM.bibliography_requiresApprovalFor= "GgImagineBatch" IM.illustrations_approvedBy= "felipe" IM.materialsCitations_approvedBy= "felipe" IM.metadata_approvedBy= "guilherme" IM.tables_requiresApprovalFor= "GgImagineBatch" IM.taxonomicNames_approvedBy= "felipe" IM.treatments_approvedBy= "guilherme" checkinTime= "1720669084001" checkinUser= "felipe" docAuthor= "Peixoto, Luiz Antônio Wanderley & de Pinna, Mário" docDate= "2022" docId= "03D75034FFC1E419FCF1559B74DEFA73" docLanguage= "en" docName= "NeotropIchthyol.20.1.e210009.pdf" docOrigin= "Neotropical Ichthyology (e 210009) 20 (1)" docSource= "http://dx.doi.org/10.1590/1982-0224-2021-0009" docStyle= "DocumentStyle:FC0C3FD10650AF21F8DA93D98D275823.3:NeotropIchthyol.2020-.journal_article" docStyleId= "FC0C3FD10650AF21F8DA93D98D275823" docStyleName= "NeotropIchthyol.2020-.journal_article" docStyleVersion= "3" docTitle= "Hypopomus Gill 1864" docType= "treatment" docVersion= "4" lastPageNumber= "34" masterDocId= "FFEE284CFFE1E438FFB65162717CF803" masterDocTitle= "Patterns of diversification and phylogenetic structure in the dorsolateral head musculature of Neotropical electric eels (Ostariophysi: Gymnotiformes), with a myological synonymy" masterLastPageNumber= "117" masterPageNumber= "1" pageNumber= "33" updateTime= "1723818792354" updateUser= "ExternalLinkService" zenodo-license-document= "CC-BY-4.0" >
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<mods:title id= "BA85EA7CDC5478C11E6A4413B6C98D4F" > Patterns of diversification and phylogenetic structure in the dorsolateral head musculature of Neotropical electric eels (Ostariophysi: Gymnotiformes), with a myological synonymy</mods:title>
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<mods:namePart id= "55B93FBCFC66181042EEDAC0C4B3F5A0" > Peixoto, Luiz Antônio Wanderley</mods:namePart>
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<mods:namePart id= "3ECF3E82B1966E0E0744187ED35518EB" > de Pinna, Mário</mods:namePart>
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<mods:title id= "4AA29396DF814BE53C2D29346DC7DDFA" > Neotropical Ichthyology</mods:title>
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<treatment id= "03D75034FFC1E419FCF1559B74DEFA73" ID-DOI= "http://doi.org/10.5281/zenodo.12719988" ID-Zenodo-Dep= "12719988" LSID= "urn:lsid:plazi:treatment:03D75034FFC1E419FCF1559B74DEFA73" httpUri= "http://treatment.plazi.org/id/03D75034FFC1E419FCF1559B74DEFA73" lastPageId= "33" lastPageNumber= "34" pageId= "32" pageNumber= "33" >
<subSubSection id= "C364B2A9FFC1E418FCF1559B7507FE86" pageId= "32" pageNumber= "33" type= "nomenclature" >
<paragraph id= "8BC1E122FFC1E418FCF1559B7528FD13" blockId= "32.[839,1108,1272,1297]" box= "[839,1108,1272,1297]" pageId= "32" pageNumber= "33" >
<heading id= "D089564EFFC1E418FCF1559B7528FD13" box= "[839,1108,1272,1297]" centered= "true" fontSize= "10" level= "2" pageId= "32" pageNumber= "33" reason= "2" >
<taxonomicName id= "4C7E9AA1FFC1E418FCF1559B7528FD13" ID-CoL= "52V6" authority= "Gill, 1864" authorityName= "Gill" authorityYear= "1864" box= "[839,1108,1272,1297]" family= "Hypopomidae" genus= "Hypopomus" kingdom= "Animalia" order= "Gymnotiformes" pageId= "32" pageNumber= "33" phylum= "Chordata" rank= "genus" >
<emphasis id= "B90A3D30FFC1E418FCF1559B72A1FD12" bold= "true" box= "[839,989,1273,1297]" pageId= "32" pageNumber= "33" > Hypopomus</emphasis>
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Gill, 1864
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<paragraph id= "8BC1E122FFC1E418FDB054217507FE86" blockId= "32.[485,1461,1347,1894]" pageId= "32" pageNumber= "33" >
<emphasis id= "B90A3D30FFC1E418FDB054217265FD58" bold= "true" box= "[518,793,1347,1371]" pageId= "32" pageNumber= "33" > Adductor mandibulae.</emphasis>
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The
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<emphasis id= "B90A3D30FFC1E418FCEF542172D9FD58" box= "[857,933,1347,1371]" italics= "true" pageId= "32" pageNumber= "33" > malaris</emphasis>
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originates from the mid-dorsal portion of the hyomandibula and preopercle. Its insertion occurs on the posteromedial portion of the antorbital bone by a fibrous attachment, with its mesialmost fibers converging onto a small endomaxillary ligament, less than one-third the length of the
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<emphasis id= "B90A3D30FFC1E418FB4654D17440FDC8" box= "[1264,1340,1459,1483]" italics= "true" pageId= "32" pageNumber= "33" > malaris</emphasis>
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which, in turn, inserts on the posteromedial portion of the maxilla (
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<figureCitation id= "1345FDA7FFC1E418FBDD54BA75D3FDF2" box= "[1131,1199,1496,1521]" captionStart= "FIGURE 4" captionStartId= "13.[136,209,902,922]" captionTargetBox= "[231,1363,171,844]" captionTargetId= "figure-21@13.[231,1364,171,845]" captionTargetPageId= "13" captionText= "FIGURE 4 | Mesial view of adductor mandibulae of Hypopomus artedi (Hypopomidae), USNM 408442, 202. 7 mm LEA. Anatomical abbreviations in Tab. 1. Scale bar = 4 mm." figureDoi= "http://doi.org/10.5281/zenodo.13332571" httpUri= "https://zenodo.org/record/13332571/files/figure.png" pageId= "32" pageNumber= "33" > Fig. 4</figureCitation>
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). The
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<emphasis id= "B90A3D30FFC1E418FB4C54BA7442FDF3" box= "[1274,1342,1496,1520]" italics= "true" pageId= "32" pageNumber= "33" > rictalis</emphasis>
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originates in the preopercle, sympletic, quadrate, and hyomandibula. The lateralmost fibers of
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<emphasis id= "B90A3D30FFC1E418FE5E57417350FE38" box= "[488,556,1571,1595]" italics= "true" pageId= "32" pageNumber= "33" > rictalis</emphasis>
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surpass the anterior margin of the preopercular fossa and reach the mid-portion of the preopercle; with the posterodorsal fibers almost reaching the posterior margin of that bone. That subsection inserts on the coronoid process.
</paragraph>
</subSubSection>
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<subSubSection id= "C364B2A9FFC1E419FDB057F174DEFA73" lastPageId= "33" lastPageNumber= "34" pageId= "32" pageNumber= "33" type= "description" >
<paragraph id= "8BC1E122FFC1E418FDB057F175D9FF65" blockId= "32.[485,1461,1347,1894]" pageId= "32" pageNumber= "33" >
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The
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<emphasis id= "B90A3D30FFC1E418FD8957F173F5FEA8" box= "[575,649,1683,1707]" italics= "true" pageId= "32" pageNumber= "33" > stegalis</emphasis>
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arises from the sphenotic, pterosphenoid, metapterygoid and anterior margin of the hyomandibula. Towards its insertion, the fibers of
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<emphasis id= "B90A3D30FFC1E418FB1657DA7596FED3" box= "[1184,1258,1720,1744]" italics= "true" pageId= "32" pageNumber= "33" > stegalis</emphasis>
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differentiates into an intersegmental aponeurosis, dorsally entering the mandibular tendon and ventrally the meckelian tendon which, in turn, inserts onto the coronomeckelian bone (
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<figureCitation id= "1345FDA7FFC1E418FAD5566174D4FF18" box= "[1379,1448,1795,1819]" captionStart= "FIGURE 4" captionStartId= "13.[136,209,902,922]" captionTargetBox= "[231,1363,171,844]" captionTargetId= "figure-21@13.[231,1364,171,845]" captionTargetPageId= "13" captionText= "FIGURE 4 | Mesial view of adductor mandibulae of Hypopomus artedi (Hypopomidae), USNM 408442, 202. 7 mm LEA. Anatomical abbreviations in Tab. 1. Scale bar = 4 mm." figureDoi= "http://doi.org/10.5281/zenodo.13332571" httpUri= "https://zenodo.org/record/13332571/files/figure.png" pageId= "32" pageNumber= "33" > Fig. 4</figureCitation>
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). The
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<emphasis id= "B90A3D30FFC1E418FDA8564A7314FF43" box= "[542,616,1832,1856]" italics= "true" pageId= "32" pageNumber= "33" > stegalis</emphasis>
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is located laterally in relation to the basal region of the endopterygoid and
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<emphasis id= "B90A3D30FFC1E418FE5E562C73AFFF65" box= "[488,723,1870,1894]" italics= "true" pageId= "32" pageNumber= "33" > adductor arcus palatini</emphasis>
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, overlapping those structures completely.
</paragraph>
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<paragraph id= "8BC1E122FFC0E419FDB051DC74CFF923" blockId= "33.[488,1459,190,288]" pageId= "33" pageNumber= "34" >
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The
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<emphasis id= "B90A3D30FFC0E419FDF251DD7233F8D5" box= "[580,847,190,214]" italics= "true" pageId= "33" pageNumber= "34" > segmentum mandibularis</emphasis>
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is located dorsally to Meckel’ s cartilage and does not contact directly the dorsal margin of Meckel’ s cartilage. The path of the
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<emphasis id= "B90A3D30FFC0E419FAC55186739EF923" italics= "true" pageId= "33" pageNumber= "34" > ramus mandibularis trigeminus</emphasis>
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nerve is lateral to the
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<emphasis id= "B90A3D30FFC0E419FC79506A756FF923" box= "[975,1043,264,288]" italics= "true" pageId= "33" pageNumber= "34" > rictalis</emphasis>
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and
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<emphasis id= "B90A3D30FFC0E419FBFE506A75EEF923" box= "[1096,1170,264,288]" italics= "true" pageId= "33" pageNumber= "34" > stegalis</emphasis>
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, and mesial to the
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<emphasis id= "B90A3D30FFC0E419FAE8506A74D6F923" box= "[1374,1450,264,288]" italics= "true" pageId= "33" pageNumber= "34" > malaris</emphasis>
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.
</paragraph>
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<paragraph id= "8BC1E122FFC0E419FDB0503174DEFA73" blockId= "33.[486,1459,339,624]" pageId= "33" pageNumber= "34" >
<emphasis id= "B90A3D30FFC0E419FDB050317258F968" bold= "true" box= "[518,804,339,363]" pageId= "33" pageNumber= "34" > Levator arcus palatini.</emphasis>
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The
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<emphasis id= "B90A3D30FFC0E419FCC650317524F968" box= "[880,1112,339,363]" italics= "true" pageId= "33" pageNumber= "34" > levator arcus palatini</emphasis>
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has a roughly parallelogram shape (
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<figureCitation id= "1345FDA7FFC0E419FD80501A73F5F993" box= "[566,649,376,400]" captionStart= "FIGURE 16" captionStartId= "34.[136,209,1126,1146]" captionTargetBox= "[136,1458,171,1077]" captionTargetId= "figure-205@34.[136,1459,171,1078]" captionTargetPageId= "34" captionText= "FIGURE 16 | Lateral view of dorsolateral musculature of Hypopomus artedi (Hypopomidae), USNM 408442, 202. 7 mm LEA. A= anterolateral fibers of the levator arcus palatini; P= posterolateral fibers of the levator arcus palatini. Remaining anatomical abbreviations in Tab. 1. Scale bar = 5 mm." figureDoi= "http://doi.org/10.5281/zenodo.13332597" httpUri= "https://zenodo.org/record/13332597/files/figure.png" pageId= "33" pageNumber= "34" > Fig. 16</figureCitation>
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), originating from the ventral margin of the frontal and sphenotic and inserting onto the hyomandibula. The origin of the
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<emphasis id= "B90A3D30FFC0E419FB9E50FC7582F9B5" box= "[1064,1278,414,438]" italics= "true" pageId= "33" pageNumber= "34" > levator arcus palatini</emphasis>
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is wider than its insertion, approximately one and a half of its insertion. At the insertion, the anterolateral and posterolateral fiber bundles of the
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<emphasis id= "B90A3D30FFC0E419FC1D508A75F7FA03" box= "[939,1163,488,512]" italics= "true" pageId= "33" pageNumber= "34" > levator arcus palatini</emphasis>
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are lateral to the
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<emphasis id= "B90A3D30FFC0E419FAD6508A74D0FA03" box= "[1376,1452,488,512]" italics= "true" pageId= "33" pageNumber= "34" > malaris</emphasis>
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, while its anteromesial and posteromesial bundles are medial to the
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<emphasis id= "B90A3D30FFC0E419FB5B536C7445FA25" box= "[1261,1337,526,550]" italics= "true" pageId= "33" pageNumber= "34" > malaris</emphasis>
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. Only the dorsalmost fibers of the posterior portion of the
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<emphasis id= "B90A3D30FFC0E419FBA753517591FA48" box= "[1041,1261,563,587]" italics= "true" pageId= "33" pageNumber= "34" > levator arcus palatini</emphasis>
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are mesial to the
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<emphasis id= "B90A3D30FFC0E419FE5C533A73E6FA73" box= "[490,666,600,624]" italics= "true" pageId= "33" pageNumber= "34" > dilatator operculi</emphasis>
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, but without reaching the median portion of the
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<emphasis id= "B90A3D30FFC0E419FB75533A74E7FA73" box= "[1219,1435,600,624]" italics= "true" pageId= "33" pageNumber= "34" > levator arcus palatini</emphasis>
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.
</paragraph>
</subSubSection>
</treatment>
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