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<document ID-DOI="http://doi.org/10.5281/zenodo.5681256" ID-GBIF-Dataset="d52c35d4-a874-49df-90dc-733b81d49f17" ID-GBIF-Taxon="137281626" ID-Zenodo-Dep="5681256" LSID="urn:lsid:zoobank.org:act:089E738D-0D2D-4C35-B3B2-6518CB675C26" checkinTime="1510611825972" checkinUser="plazi" docAuthor="Maxwell J. Bernt &amp; James S. Albert" docDate="2017" docId="03AC9806FFCC1B18FCF93BC1FABDFA87" docLanguage="en" docName="copeia.105.2.211.pdf" docOrigin="Copeia 105 (2)" docStyle="DocumentStyle{}" docTitle="Compsaraia iara Maxwell J. Bernt &amp; James S. Albert 2017, new species" docType="treatment" docUuid="089E738D-0D2D-4C35-B3B2-6518CB675C26" docUuidSource="ZooBank" docVersion="6" lastPageId="5" lastPageNumber="216" masterDocId="FF95E07EFFCD1B1DFFCD3A55FFD6FFCE" masterDocTitle="A New Species of Deep-channel Electric Knifefish Compsaraia (Apteronotidae, Gymnotiformes) from the Amazon River" masterLastPageNumber="219" masterPageNumber="211" pageId="1" pageNumber="212" updateTime="1636724922165" updateUser="ExternalLinkService">
<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo>
<mods:title>A New Species of Deep-channel Electric Knifefish Compsaraia (Apteronotidae, Gymnotiformes) from the Amazon River</mods:title>
</mods:titleInfo>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>Maxwell J. Bernt</mods:namePart>
</mods:name>
<mods:name type="personal">
<mods:role>
<mods:roleTerm>Author</mods:roleTerm>
</mods:role>
<mods:namePart>James S. Albert</mods:namePart>
</mods:name>
<mods:typeOfResource>text</mods:typeOfResource>
<mods:relatedItem type="host">
<mods:titleInfo>
<mods:title>Copeia</mods:title>
</mods:titleInfo>
<mods:part>
<mods:date>2017</mods:date>
<mods:detail type="volume">
<mods:number>105</mods:number>
</mods:detail>
<mods:detail type="issue">
<mods:number>2</mods:number>
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<mods:extent unit="page">
<mods:start>211</mods:start>
<mods:end>219</mods:end>
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<mods:classification>journal article</mods:classification>
<mods:identifier type="DOI">10.1643/CI-16-529</mods:identifier>
<mods:identifier type="GBIF-Dataset">d52c35d4-a874-49df-90dc-733b81d49f17</mods:identifier>
<mods:identifier type="Zenodo-Dep">1048340</mods:identifier>
<mods:identifier type="ZooBank">ED8EB131-6D29-4664-B4AF-00A7BD2C247A</mods:identifier>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.5681256" ID-GBIF-Taxon="137281626" ID-Zenodo-Dep="5681256" LSID="urn:lsid:zoobank.org:act:089E738D-0D2D-4C35-B3B2-6518CB675C26" httpUri="http://treatment.plazi.org/id/03AC9806FFCC1B18FCF93BC1FABDFA87" lastPageId="5" lastPageNumber="216" pageId="1" pageNumber="212">
<subSubSection box="[820,1169,404,427]" pageId="1" pageNumber="212" type="nomenclature">
<paragraph blockId="1.[820,1492,404,516]" box="[820,1169,404,427]" pageId="1" pageNumber="212">
<heading bold="true" box="[820,1169,404,427]" fontSize="9" level="2" pageId="1" pageNumber="212" reason="6">
<emphasis bold="true" box="[820,1169,404,427]" pageId="1" pageNumber="212">
<emphasis bold="true" box="[820,1017,404,427]" italics="true" pageId="1" pageNumber="212">
<taxonomicName authority="Maxwell J. Bernt &amp; James S. Albert, 2017" authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[820,1011,404,427]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="species" species="iara" status="new species">Compsaraia iara</taxonomicName>
,
</emphasis>
<taxonomicNameLabel box="[1025,1169,404,427]" pageId="1" pageNumber="212" rank="species">new species</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection pageId="1" pageNumber="212" type="description">
<paragraph blockId="1.[820,1492,404,516]" pageId="1" pageNumber="212">urn:lsid:zoobank.org:act:089E738D-0D2D-4C35-B3B2- 6518CB675C26</paragraph>
<paragraph blockId="1.[820,1492,404,516]" box="[820,1109,493,516]" pageId="1" pageNumber="212">
<figureCitation box="[820,917,493,516]" captionStart="Fig. 1" captionStartId="2.[142,170,510,530]" captionTargetBox="[142,1530,130,480]" captionTargetId="figure@2.[142,1530,130,480]" captionText="Fig. 1. Compsaraia iara, MZUSP 121514, 203 mm TL, holotype, Brazil, Pará, Rio Amazonas. Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048342/files/figure.png" pageId="1" pageNumber="212">Figures 1</figureCitation>
, 3, 4, 5B;
<tableCitation box="[1031,1109,493,516]" captionStart="Table 1" captionStartId="4.[142,190,1120,1140]" captionTargetBox="[142,1528,1159,2007]" captionText="Table 1. Summary of morphometric and meristic measurements for Compsaraia iara." httpUri="http://table.plazi.org/id/DF7A7998FFC91B19FF433E35FC11FBBA" pageId="1" pageNumber="212" tableUuid="DF7A7998FFC91B19FF433E35FC11FBBA">Table 1</tableCitation>
</paragraph>
</subSubSection>
<subSubSection pageId="1" pageNumber="212" type="reference_group">
<paragraph blockId="1.[820,1490,552,694]" pageId="1" pageNumber="212">
<taxonomicName authority="Cox Fernandes, 1995: 30" authorityName="Cox Fernandes" authorityPageNumber="30" authorityYear="1995" box="[820,1309,552,575]" class="Actinopterygii" family="Apteronotidae" genus="Porotergus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="species" species="gymnotus">
<emphasis box="[820,1032,553,574]" italics="true" pageId="1" pageNumber="212">Porotergus gymnotus</emphasis>
<bibRefCitation author="Cox Fernandes, C." box="[1040,1276,552,575]" journalOrPublisher="Duke University, Durham, North Carolina" pageId="1" pageNumber="212" refString="Cox Fernandes, C. 1995. Diversity, distribution, and community structure of electric fishes (Gymnotiformes) in the channels of the Amazon River system, Brazil. Unpubl. Ph. D. diss., Duke University, Durham, North Carolina." title="Diversity, distribution, and community structure of electric fishes (Gymnotiformes) in the channels of the Amazon River system, Brazil. Unpubl. Ph. D. diss" type="book" year="1995">Cox Fernandes, 1995</bibRefCitation>
:30
</taxonomicName>
31, 9395.
<taxonomicName baseAuthorityName="de Santana and Crampton" baseAuthorityYear="2010" box="[820,925,583,604]" class="Actinopterygii" family="Apteronotidae" genus="Porotergus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="genus">
<emphasis box="[820,925,583,604]" italics="true" pageId="1" pageNumber="212">Porotergus</emphasis>
</taxonomicName>
sp.
<bibRefCitation author="Cox Fernandes, C." box="[972,1208,582,605]" journalOrPublisher="Duke University, Durham, North Carolina" pageId="1" pageNumber="212" refString="Cox Fernandes, C. 1995. Diversity, distribution, and community structure of electric fishes (Gymnotiformes) in the channels of the Amazon River system, Brazil. Unpubl. Ph. D. diss., Duke University, Durham, North Carolina." title="Diversity, distribution, and community structure of electric fishes (Gymnotiformes) in the channels of the Amazon River system, Brazil. Unpubl. Ph. D. diss" type="book" year="1995">Cox Fernandes, 1995</bibRefCitation>
:3132, 102104.
<taxonomicName baseAuthorityName="de Santana and Crampton" baseAuthorityYear="2010" box="[820,925,613,634]" class="Actinopterygii" family="Apteronotidae" genus="Porotergus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="genus">
<emphasis box="[820,925,613,634]" italics="true" pageId="1" pageNumber="212">Porotergus</emphasis>
</taxonomicName>
sp. 2.
<bibRefCitation author="Cox Fernandes, C. &amp; J. Podos &amp; J. G. Lundberg" box="[1005,1308,611,634]" journalOrPublisher="Science" pageId="1" pageNumber="212" pagination="1960 - 1962" part="305" refString="Cox Fernandes, C., J. Podos, and J. G. Lundberg. 2004. Amazonian ecology: tributaries enhance the diversity of electric fishes. Science 305: 1960 - 1962." title="Amazonian ecology: tributaries enhance the diversity of electric fishes" type="journal article" year="2004">Cox Fernandes et al., 2004</bibRefCitation>
(supplementary
</paragraph>
<paragraph blockId="1.[820,1490,552,694]" box="[846,972,641,664]" pageId="1" pageNumber="212">material):4.</paragraph>
<paragraph blockId="1.[820,1490,552,694]" box="[820,1463,671,694]" pageId="1" pageNumber="212">
<taxonomicName baseAuthorityName="de Santana and Crampton" baseAuthorityYear="2010" box="[820,925,672,693]" class="Actinopterygii" family="Apteronotidae" genus="Porotergus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="genus">
<emphasis box="[820,925,672,693]" italics="true" pageId="1" pageNumber="212">Porotergus</emphasis>
</taxonomicName>
sp.
<bibRefCitation author="Crampton, W. G. R. &amp; A. Cella-Ribeiro" box="[972,1356,671,694]" editor="L. J. de Queiroz" journalOrPublisher="Santo Antonio Energia, Sao Paulo, Brazil" pageId="1" pageNumber="212" pagination="256 - 289" refString="Crampton, W. G. R., and A. Cella-Ribeiro. 2013. Capitulo 44 Apteronotidae, p. 256 - 289. In: Peixes do Rio Madeira. Vol. 3. L. J. de Queiroz, G. Torrente-Vilara, W. M. Ohara, T. H. S. Pires, J. Zuanon, and C. R. C. Doria (eds.). Santo Antonio Energia, Sao Paulo, Brazil." title="Capitulo 44 Apteronotidae" type="book chapter" volumeTitle="Peixes do Rio Madeira. Vol. 3" year="2013">Crampton and Cella-Ribeiro, 2013</bibRefCitation>
:272273.
</paragraph>
</subSubSection>
<subSubSection pageId="1" pageNumber="212" type="materials_examined">
<paragraph blockId="1.[820,1490,724,836]" pageId="1" pageNumber="212">
<materialsCitation ID-GBIF-Occurrence="1699979717" collectingDate="1994-11-15" collectionCode="MZUSP" collectorName=", A. Zanata" country="Brazil" county="Pará" latitude="-1.207222" location="Rio Amazonas, between Rio Mojui and Furo do Tajapuru, between towns Gurupá and Serraria" longitude="-51.319167" pageId="1" pageNumber="212" specimenCode="MZUSP 121514" specimenCount="1" typeStatus="holotype">
<emphasis bold="true" box="[820,945,724,747]" italics="true" pageId="1" pageNumber="212">
<typeStatus box="[820,917,724,747]" pageId="1" pageNumber="212">Holotype</typeStatus>
.—
</emphasis>
<specimenCode box="[945,1125,724,747]" pageId="1" pageNumber="212">
MZUSP
<quantity box="[1040,1242,724,747]" metricMagnitude="5" metricUnit="m" metricValue="1.21514203" pageId="1" pageNumber="212" unit="mm" value="1.21514203E8">121514, 203 mm</quantity>
</specimenCode>
TL,
<collectingCountry box="[1305,1369,724,747]" name="Brazil" pageId="1" pageNumber="212">Brazil</collectingCountry>
,
<collectingCounty box="[1387,1434,725,747]" pageId="1" pageNumber="212">Pará</collectingCounty>
,
<location LSID="urn:lsid:plazi:treatment:03AC9806FFCC1B18FCF93BC1FABDFA87:8EDA7FCBFFCC1B1CFA633881FAF1FCE8" country="Brazil" county="Pará" name="Rio Amazonas, between Rio Mojui and Furo do Tajapuru, between towns Gurupá and Serraria" pageId="1" pageNumber="212">Rio Amazonas, between Rio Mojui and Furo do Tajapuru, between towns Gurupá and Serraria</location>
,
<geoCoordinate box="[1348,1481,780,806]" pageId="1" pageNumber="212">01°12 &quot;26 &quot; &quot;S</geoCoordinate>
,
<geoCoordinate box="[820,955,809,836]" pageId="1" pageNumber="212">51°19&quot;09&quot; &quot;W</geoCoordinate>
<collectorName box="[954,1071,814,835]" pageId="1" pageNumber="212">, A. Zanata</collectorName>
et al.,
<collectingDate box="[1148,1364,813,836]" pageId="1" pageNumber="212" value="1994-11-15">
<date box="[1148,1364,813,836]" pageId="1" pageNumber="212" value="1994-11-15">15 November 1994</date>
</collectingDate>
.
</materialsCitation>
</paragraph>
<paragraph blockId="1.[820,1490,866,1273]" pageId="1" pageNumber="212">
<emphasis bold="true" box="[820,954,866,889]" italics="true" pageId="1" pageNumber="212">Paratypes.—</emphasis>
Brazil: Amazonas: ANSP 192781, 1, 220 mm TL, Rio Juruá, upriver of Pauapixuna, downriver of Humaitá, 0 2°441&quot;14.1&quot; &quot;S, 65°46&quot;37.4&quot; &quot;W; FMNH 128428, 1, 235 mm TL, Rio Solimões near Manaus, immediately upstream of the confluence with Rio Negro; MZUSP 56074, 15, Rio Solimões, 1 5 km downstream or Paraná Iranduba, 3°1 4&quot;2 2 &quot; &quot;S, 59°53&quot;53&quot; &quot;W. Pará: ANSP 195554, 9, 137181 mm TL, Rio Amazonas above mouth of Rio Tapajós, 6.5 km downriver of Astréia; FMNH 115028, 14, 3 CS, 133216 mm TL, Rio Amazonas, between Furo de Urucuricaia and Paraná dos Arraiolos, between towns Almeirim and Gurupá, 0 1°29&quot;11&quot; &quot;S, 0 52°0 9&quot;46&quot; &quot;W; FMNH 115029, 1, 198 mm TL, Rio Amazonas, between Rio Mojui and Furo do Tajapuru, between towns Gurupá and Serraria, 0 1°12&quot;26&quot; &quot;S, 51°19&quot;0 9 &quot; &quot;W.
</paragraph>
<paragraph blockId="1.[820,1490,1304,1592]" pageId="1" pageNumber="212">
<emphasis bold="true" box="[820,1053,1304,1327]" italics="true" pageId="1" pageNumber="212">Non-type material.—</emphasis>
FMNH 115 0 33, 1, 185 mm TL, Rio Amazonas, between tributaries Trombetas and Paraná Mirim de Óbidos, between Juruti and Óbidos, 0 1°5 4&quot;1 5 &quot; &quot;S, 0 55°34&quot;44&quot; &quot;W; FMNH 115037, 1, 204 mm TL, Rio Amazonas, between tributaries Trombetas and Paraná do Amador, between Óbidos and Santarém, 0 2°0 2&quot;55&quot; &quot;S, 0 55°20&quot;56&quot; &quot;W. Roraima: ANSP 192777, 3, 196230 mm TL, Rio Branco, 12 km upriver of Rio Negro, between Ataúba and Caruna, 0 1°17&quot;45.6&quot; &quot;S, 0 61°51&quot;21.9&quot; &quot;W; ANSP 192778, 2, 199219 mm TL, Rio Branco, between Ataúba and Caruna.
</paragraph>
</subSubSection>
<subSubSection pageId="1" pageNumber="212" type="diagnosis">
<paragraph blockId="1.[820,1491,1623,1882]" pageId="1" pageNumber="212">
<emphasis box="[820,1131,1623,1646]" italics="true" pageId="1" pageNumber="212">
<emphasis bold="true" box="[820,953,1623,1646]" italics="true" pageId="1" pageNumber="212">Diagnosis.—</emphasis>
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[953,1131,1624,1645]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="species" species="iara">Compsaraia iara</taxonomicName>
</emphasis>
can be unambiguously distinguished from all congeners by the following characters: forehead strongly rounded with dorsal margin of frontals and parasphenoid convex (vs. straight or concave in adult
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="species" species="compsa">
<emphasis italics="true" pageId="1" pageNumber="212">C. compsa</emphasis>
</taxonomicName>
and
<emphasis box="[959,1072,1741,1763]" italics="true" pageId="1" pageNumber="212">C. samueli</emphasis>
;
<figureCitation box="[1089,1163,1741,1764]" captionStart="Fig. 2" captionStartId="2.[142,170,1976,1996]" captionTargetBox="[142,1529,727,1946]" captionTargetId="figure@2.[142,1529,727,1946]" captionTargetPageId="2" captionText="Fig. 2. (A) Compsaraia samueli, male, MUSM 54638, 199 mm TL, Peru, Loreto, Rio Nanay. (B) Compsaraia samueli, female, MUSM 54620, 137 mm TL, Peru, Loreto, Rio Amazonas. (C) Compsaraia compsa, ANSP 160194, paratype, 262 mm TL, Venezuela, Apure, Rio Meta. Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048344/files/figure.png" pageId="1" pageNumber="212">Figs. 2</figureCitation>
,
<figureCitation box="[1177,1210,1742,1763]" captionStart="Fig. 3" captionStartId="3.[103,131,1088,1108]" captionTargetBox="[103,1490,130,1058]" captionTargetId="figure@3.[103,1490,130,1058]" captionTargetPageId="3" captionText="Fig. 3. Detail of head and pigmentation for Compsaraia samueli (top), MUSM 37172, 241 mm TL, and Compsaraia iara, FMNH 128428, 235 mm TL in lateral view (A), dorsal view (B), and ventral view (C). Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048346/files/figure.png" pageId="1" pageNumber="212">3A</figureCitation>
,
<figureCitation box="[1224,1257,1741,1764]" captionStart="Fig. 5" captionStartId="4.[142,170,904,924]" captionTargetBox="[0,1529,53,875]" captionTargetId="figure@4.[142,1529,130,875]" captionTargetPageId="4" captionText="Fig. 5. Neurocrania of juvenile and adult Compsaraia compsa, ANSP 163033, 119 and 285 mm TL (A) and Compsaraia iara, FMNH 115028, 147 and 208 mm TL (B)." httpUri="https://zenodo.org/record/1048350/files/figure.png" pageId="1" pageNumber="212">5A</figureCitation>
). Mouth small, gape not reaching vertical with eye in adults (
<figureCitation box="[1261,1339,1771,1794]" captionStart="Fig. 3" captionStartId="3.[103,131,1088,1108]" captionTargetBox="[103,1490,130,1058]" captionTargetId="figure@3.[103,1490,130,1058]" captionTargetPageId="3" captionText="Fig. 3. Detail of head and pigmentation for Compsaraia samueli (top), MUSM 37172, 241 mm TL, and Compsaraia iara, FMNH 128428, 235 mm TL in lateral view (A), dorsal view (B), and ventral view (C). Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048346/files/figure.png" pageId="1" pageNumber="212">Fig. 3C</figureCitation>
), vs. reaching or exceeding vertical with eye in adult
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[1287,1400,1801,1822]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[1287,1400,1801,1822]" italics="true" pageId="1" pageNumber="212">C. compsa</emphasis>
</taxonomicName>
and
<emphasis italics="true" pageId="1" pageNumber="212">C. samueli</emphasis>
. Teeth absent from premaxilla, vs. 816 teeth on the premaxilla in
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[976,1084,1860,1881]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="1" pageNumber="212" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[976,1084,1860,1881]" italics="true" pageId="1" pageNumber="212">C. compsa</emphasis>
</taxonomicName>
and 410 in
<emphasis box="[1234,1345,1859,1881]" italics="true" pageId="1" pageNumber="212">C. samueli</emphasis>
.
</paragraph>
</subSubSection>
<subSubSection lastPageId="5" lastPageNumber="216" pageId="1" pageNumber="212" type="description">
<paragraph blockId="1.[820,1490,1913,2024]" pageId="1" pageNumber="212">
<emphasis bold="true" box="[820,969,1913,1936]" italics="true" pageId="1" pageNumber="212">Description.—</emphasis>
Body elongate and laterally compressed (
<figureCitation box="[1414,1483,1913,1936]" captionStart="Fig. 1" captionStartId="2.[142,170,510,530]" captionTargetBox="[142,1530,130,480]" captionTargetId="figure@2.[142,1530,130,480]" captionText="Fig. 1. Compsaraia iara, MZUSP 121514, 203 mm TL, holotype, Brazil, Pará, Rio Amazonas. Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048342/files/figure.png" pageId="1" pageNumber="212">Figs. 1</figureCitation>
, 3). Morphometric and meristic data summarized in
<tableCitation box="[1403,1484,1942,1965]" captionStart="Table 1" captionStartId="4.[142,190,1120,1140]" captionTargetBox="[142,1528,1159,2007]" captionText="Table 1. Summary of morphometric and meristic measurements for Compsaraia iara." httpUri="http://table.plazi.org/id/DF7A7998FFC91B19FF433E35FC11FBBA" pageId="1" pageNumber="212" tableUuid="DF7A7998FFC91B19FF433E35FC11FBBA">Table 1</tableCitation>
. Largest recorded size 235 mm TL. Body strongly compressed laterally. Scales absent from nape (above lateral line to about
</paragraph>
<caption box="[142,1245,509,530]" httpUri="https://zenodo.org/record/1048342/files/figure.png" pageId="2" pageNumber="213" targetBox="[142,1530,130,480]" targetPageId="2">
<paragraph blockId="2.[142,196,510,530]" box="[142,196,510,530]" pageId="2" pageNumber="213">
<heading bold="true" box="[142,196,510,530]" centered="true" fontSize="8" level="3" pageId="2" pageNumber="213" reason="2">
<emphasis bold="true" box="[142,196,510,530]" pageId="2" pageNumber="213">Fig. 1.</emphasis>
</heading>
</paragraph>
<paragraph blockId="2.[217,1245,509,530]" box="[217,1245,509,530]" pageId="2" pageNumber="213">
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[217,376,510,530]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="2" pageNumber="213" phylum="Chordata" rank="species" species="iara">
<emphasis box="[217,376,510,530]" italics="true" pageId="2" pageNumber="213">Compsaraia iara</emphasis>
</taxonomicName>
,
<emphasis bold="true" box="[389,1245,509,530]" pageId="2" pageNumber="213">MZUSP 121514, 203 mm TL, holotype, Brazil, Pará, Rio Amazonas. Scale bar equals 1 cm.</emphasis>
</paragraph>
</caption>
<paragraph blockId="2.[142,812,574,686]" lastBlockId="3.[103,773,1178,1391]" lastPageId="3" lastPageNumber="214" pageId="2" pageNumber="213">
fifth lateral-line pore) and along entire dorsal midline. Scales ovoid, oriented in 68 rows above lateral line at midbody. Eyes small and subdermal. Head short, dorsal profile convex, snout rounded. Mouth small and subterminal. Gape extending to vertical with posterior nares. Ventrally rounded lips covering most of lower jaw. Electroreceptive dorsal organ originating at about midbody. Nasal capsule elongate. Posterior nares about equidistant from eye and anterior nares. Premaxillae crescent-shaped in ventral view and lacking teeth (
<figureCitation box="[274,360,1210,1233]" captionStart="Fig. 4" captionStartId="3.[1139,1167,1444,1464]" captionTargetBox="[103,1093,1434,1845]" captionTargetId="figure@3.[103,1093,1434,1846]" captionTargetPageId="3" captionText="Fig. 4. Lateral view of neurocranium (A) and suspensorium and oral jaws (B) of Compsaraia iara, FMNH 115028, 208 mm TL. Cartilage shown in gray. Abbreviations: (A) bao, basioccipital; epo, epioccipital; exo, exoccipital; fro, frontal; let, lateral ethmoid; met, mesethmoid; obs, orbitosphenoid; par, parietal; pas, parasphenoid; pro, prootic; pto, pterotic; pts, pterosphenoid; soc, supraoccipital; spo, sphenotic; vet, ventral ethmoid; (B) aar, anguloarticular; ap, autopalatine cartilage; d, dentary; enp, endopterygoid; hm, hyomandibular; iop, interopercle; max, maxilla (detached from suspensorium); mco, mandibular canal ossicles; mpt, metapterygoid; op, opercle; pmx, premaxilla (in ventral view); pop, preopercle; q, quadrate; rar, retroarticular; sop, subopercle; sym, symplectic." httpUri="https://zenodo.org/record/1048348/files/figure.png" pageId="3" pageNumber="214">Fig. 4B</figureCitation>
). Maxillae with anteroventral shelf and anterior hook. Descending blade evenly tapered with slight dorsal curve.
</paragraph>
<caption httpUri="https://zenodo.org/record/1048344/files/figure.png" pageId="2" pageNumber="213" targetBox="[142,1529,727,1946]" targetPageId="2">
<paragraph blockId="2.[142,1530,1976,2022]" pageId="2" pageNumber="213">
<emphasis bold="true" box="[142,244,1976,1996]" pageId="2" pageNumber="213">Fig. 2. (A)</emphasis>
<emphasis box="[250,445,1976,1996]" italics="true" pageId="2" pageNumber="213">
<taxonomicName authorityName="Albert" authorityYear="2001" box="[250,365,1976,1996]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="2" pageNumber="213" phylum="Chordata" rank="genus">Compsaraia</taxonomicName>
samueli
</emphasis>
,
<emphasis bold="true" box="[455,1025,1976,1996]" pageId="2" pageNumber="213">male, MUSM 54638, 199 mm TL, Peru, Loreto, Rio Nanay. (B)</emphasis>
<emphasis box="[1030,1225,1976,1996]" italics="true" pageId="2" pageNumber="213">
<taxonomicName authorityName="Albert" authorityYear="2001" box="[1030,1146,1976,1996]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="2" pageNumber="213" phylum="Chordata" rank="genus">Compsaraia</taxonomicName>
samueli
</emphasis>
,
<emphasis bold="true" pageId="2" pageNumber="213">female, MUSM 54620, 137 mm TL, Peru, Loreto, Rio Amazonas. (C)</emphasis>
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[482,677,2002,2022]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="2" pageNumber="213" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[482,677,2002,2022]" italics="true" pageId="2" pageNumber="213">Compsaraia compsa</emphasis>
</taxonomicName>
, ANSP 160194, paratype, 262 mm TL, Venezuela, Apure, Rio Meta. Scale bar equals 1 cm.
</paragraph>
</caption>
<caption httpUri="https://zenodo.org/record/1048346/files/figure.png" pageId="3" pageNumber="214" targetBox="[103,1490,130,1058]" targetPageId="3">
<paragraph blockId="3.[103,1490,1088,1134]" pageId="3" pageNumber="214">
<emphasis bold="true" box="[103,509,1088,1108]" pageId="3" pageNumber="214">Fig. 3. Detail of head and pigmentation for</emphasis>
<emphasis box="[514,710,1088,1108]" italics="true" pageId="3" pageNumber="214">
<taxonomicName authorityName="Albert" authorityYear="2001" box="[514,630,1088,1108]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="3" pageNumber="214" phylum="Chordata" rank="genus">Compsaraia</taxonomicName>
samueli
</emphasis>
<emphasis bold="true" box="[714,762,1088,1108]" pageId="3" pageNumber="214">(top)</emphasis>
,
<emphasis bold="true" box="[772,1064,1088,1108]" pageId="3" pageNumber="214">MUSM 37172, 241 mm TL, and</emphasis>
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[1068,1227,1088,1108]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="3" pageNumber="214" phylum="Chordata" rank="species" species="iara">
<emphasis box="[1068,1227,1088,1108]" italics="true" pageId="3" pageNumber="214">Compsaraia iara</emphasis>
</taxonomicName>
, FMNH 128428, 235 mm TL in lateral view (A), dorsal view (B), and ventral view (C). Scale bar equals 1 cm.
</paragraph>
</caption>
<paragraph blockId="3.[103,773,1178,1391]" lastBlockId="5.[103,773,131,1619]" lastPageId="5" lastPageNumber="216" pageId="3" pageNumber="214">
Mesethmoid strongly decurved (
<figureCitation box="[488,570,1305,1328]" captionStart="Fig. 4" captionStartId="3.[1139,1167,1444,1464]" captionTargetBox="[103,1093,1434,1845]" captionTargetId="figure@3.[103,1093,1434,1846]" captionTargetPageId="3" captionText="Fig. 4. Lateral view of neurocranium (A) and suspensorium and oral jaws (B) of Compsaraia iara, FMNH 115028, 208 mm TL. Cartilage shown in gray. Abbreviations: (A) bao, basioccipital; epo, epioccipital; exo, exoccipital; fro, frontal; let, lateral ethmoid; met, mesethmoid; obs, orbitosphenoid; par, parietal; pas, parasphenoid; pro, prootic; pto, pterotic; pts, pterosphenoid; soc, supraoccipital; spo, sphenotic; vet, ventral ethmoid; (B) aar, anguloarticular; ap, autopalatine cartilage; d, dentary; enp, endopterygoid; hm, hyomandibular; iop, interopercle; max, maxilla (detached from suspensorium); mco, mandibular canal ossicles; mpt, metapterygoid; op, opercle; pmx, premaxilla (in ventral view); pop, preopercle; q, quadrate; rar, retroarticular; sop, subopercle; sym, symplectic." httpUri="https://zenodo.org/record/1048348/files/figure.png" pageId="3" pageNumber="214">Fig. 4A</figureCitation>
). Ventral ethmoid robust with short, posteriorly angled lateral processes contacting lateral ethmoid cartilage. Width of lateral process at base roughly equal to width at distal end. Lateral ethmoid robust in adults with dorsal articulating surface expanded, roughly twice width of ventral end. Frontal convex in lateral profile. Orbitosphenoid broadened dorsally and ventrally. Junction of orbitosphenoid and pterosphenoid protruding ventrally. Pterosphenoid without descending ventral process (seen extending toward or contacting the parasphenoid in some adult specimens of
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[392,502,131,153]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="5" pageNumber="216" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[392,502,131,153]" italics="true" pageId="5" pageNumber="216">C. compsa</emphasis>
</taxonomicName>
and
<emphasis box="[562,675,131,153]" italics="true" pageId="5" pageNumber="216">C. samueli</emphasis>
, see
<figureCitation captionStart="Fig. 5" captionStartId="4.[142,170,904,924]" captionTargetBox="[0,1529,53,875]" captionTargetId="figure@4.[142,1529,130,875]" captionTargetPageId="4" captionText="Fig. 5. Neurocrania of juvenile and adult Compsaraia compsa, ANSP 163033, 119 and 285 mm TL (A) and Compsaraia iara, FMNH 115028, 147 and 208 mm TL (B)." httpUri="https://zenodo.org/record/1048350/files/figure.png" pageId="5" pageNumber="216">Fig. 5A</figureCitation>
<emphasis box="[133,141,161,182]" italics="true" pageId="5" pageNumber="216">)</emphasis>
. Supratemporal laterosensory canal forming elongated C or L shape on posterolateral surface of parietal, extending posteriorly onto nape, visible externally (
<figureCitation box="[595,680,218,241]" captionStart="Fig. 3" captionStartId="3.[103,131,1088,1108]" captionTargetBox="[103,1490,130,1058]" captionTargetId="figure@3.[103,1490,130,1058]" captionTargetPageId="3" captionText="Fig. 3. Detail of head and pigmentation for Compsaraia samueli (top), MUSM 37172, 241 mm TL, and Compsaraia iara, FMNH 128428, 235 mm TL in lateral view (A), dorsal view (B), and ventral view (C). Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048346/files/figure.png" pageId="5" pageNumber="216">Fig. 3B</figureCitation>
; Albert, 2001:fig. 19C). Parietal branch of postotic canal with short, posteriorly angled tubule.
</paragraph>
<caption httpUri="https://zenodo.org/record/1048348/files/figure.png" pageId="3" pageNumber="214" targetBox="[103,1093,1434,1845]" targetPageId="3">
<paragraph blockId="3.[1139,1491,1444,2022]" pageId="3" pageNumber="214">
<emphasis bold="true" pageId="3" pageNumber="214">Fig. 4. Lateral view of neurocranium (A) and suspensorium and oral jaws (B) of</emphasis>
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[1224,1407,1497,1517]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="3" pageNumber="214" phylum="Chordata" rank="species" species="iara">
<emphasis box="[1224,1407,1497,1517]" italics="true" pageId="3" pageNumber="214">Compsaraia iara</emphasis>
</taxonomicName>
, FMNH 115028, 208 mm TL. Cartilage shown in gray. Abbreviations: (A) bao, basioccipital; epo, epioccipital; exo, exoccipital; fro, frontal; let, lateral ethmoid; met, mesethmoid; obs, orbitosphenoid; par, parietal; pas, parasphenoid; pro, prootic; pto, pterotic; pts, pterosphenoid; soc, supraoccipital; spo, sphenotic; vet, ventral ethmoid; (B) aar, anguloarticular; ap, autopalatine cartilage; d, dentary; enp, endopterygoid; hm, hyomandibular; iop, interopercle; max, maxilla (detached from suspensorium); mco, mandibular canal ossicles; mpt, metapterygoid; op, opercle; pmx, premaxilla (in ventral view); pop, preopercle; q, quadrate; rar, retroarticular; sop, subopercle; sym, symplectic.
</paragraph>
</caption>
<caption httpUri="https://zenodo.org/record/1048350/files/figure.png" pageId="4" pageNumber="215" targetBox="[0,1529,53,875]" targetPageId="4">
<paragraph blockId="4.[142,1529,904,951]" pageId="4" pageNumber="215">
<emphasis bold="true" box="[142,533,904,924]" pageId="4" pageNumber="215">Fig. 5. Neurocrania of juvenile and adult</emphasis>
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[539,735,904,924]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="4" pageNumber="215" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[539,735,904,924]" italics="true" pageId="4" pageNumber="215">Compsaraia compsa</emphasis>
</taxonomicName>
,
<emphasis bold="true" box="[747,1164,904,924]" pageId="4" pageNumber="215">ANSP 163033, 119 and 285 mm TL (A) and</emphasis>
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[1171,1329,904,924]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="4" pageNumber="215" phylum="Chordata" rank="species" species="iara">
<emphasis box="[1171,1329,904,924]" italics="true" pageId="4" pageNumber="215">Compsaraia iara</emphasis>
</taxonomicName>
, FMNH 115028, 147 and 208 mm TL (B).
</paragraph>
</caption>
<caption ID-Table-UUID="DF7A7998FFC91B19FF433E35FC11FBBA" box="[142,967,1120,1140]" httpUri="http://table.plazi.org/id/DF7A7998FFC91B19FF433E35FC11FBBA" pageId="4" pageNumber="215" targetBox="[142,1528,1159,2007]" targetIsTable="true" targetPageId="4">
<paragraph blockId="4.[142,967,1120,1140]" box="[142,967,1120,1140]" pageId="4" pageNumber="215">
<emphasis bold="true" box="[142,795,1120,1140]" pageId="4" pageNumber="215">Table 1. Summary of morphometric and meristic measurements for</emphasis>
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[802,962,1120,1140]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="4" pageNumber="215" phylum="Chordata" rank="species" species="iara">
<emphasis box="[802,962,1120,1140]" italics="true" pageId="4" pageNumber="215">Compsaraia iara</emphasis>
</taxonomicName>
.
</paragraph>
</caption>
<paragraph pageId="4" pageNumber="215">
<table box="[142,1528,1159,2007]" gridcols="4" gridrows="29" pageId="4" pageNumber="215">
<tr box="[142,1528,1159,1182]" gridrow="0" pageId="4" pageNumber="215">
<th box="[142,529,1159,1182]" gridcol="0" gridrow="0" pageId="4" pageNumber="215">
<emphasis bold="true" box="[142,243,1159,1182]" pageId="4" pageNumber="215">Character</emphasis>
</th>
<th box="[597,865,1159,1182]" gridcol="1" gridrow="0" pageId="4" pageNumber="215">
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[695,766,1159,1182]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="4" pageNumber="215" phylum="Chordata" rank="species" species="iara">
<emphasis box="[695,766,1159,1182]" italics="true" pageId="4" pageNumber="215">C. iara</emphasis>
</taxonomicName>
</th>
<th box="[932,1193,1159,1182]" gridcol="2" gridrow="0" pageId="4" pageNumber="215">
<emphasis box="[1006,1119,1159,1182]" italics="true" pageId="4" pageNumber="215">C. samueli</emphasis>
</th>
<th box="[1261,1528,1159,1182]" gridcol="3" gridrow="0" pageId="4" pageNumber="215">
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[1339,1451,1159,1182]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="4" pageNumber="215" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[1339,1451,1159,1182]" italics="true" pageId="4" pageNumber="215">C. compsa</emphasis>
</taxonomicName>
</th>
</tr>
<tr box="[142,1528,1209,1232]" gridrow="1" pageId="4" pageNumber="215">
<th box="[142,529,1209,1232]" gridcol="0" gridrow="1" pageId="4" pageNumber="215">
<emphasis box="[142,155,1209,1232]" italics="true" pageId="4" pageNumber="215">n</emphasis>
</th>
<td box="[597,865,1209,1232]" gridcol="1" gridrow="1" pageId="4" pageNumber="215">34</td>
<td box="[932,1193,1209,1232]" gridcol="2" gridrow="1" pageId="4" pageNumber="215">60</td>
<td box="[1261,1528,1209,1232]" gridcol="3" gridrow="1" pageId="4" pageNumber="215">51</td>
</tr>
<tr box="[142,1528,1238,1261]" gridrow="2" pageId="4" pageNumber="215">
<th box="[142,529,1238,1261]" gridcol="0" gridrow="2" pageId="4" pageNumber="215">Total length (TL)</th>
<td box="[597,865,1238,1261]" gridcol="1" gridrow="2" pageId="4" pageNumber="215">133235</td>
<td box="[932,1193,1238,1261]" gridcol="2" gridrow="2" pageId="4" pageNumber="215">68241</td>
<td box="[1261,1528,1238,1261]" gridcol="3" gridrow="2" pageId="4" pageNumber="215">75326</td>
</tr>
<tr box="[142,1528,1266,1289]" gridrow="3" pageId="4" pageNumber="215">
<th box="[142,529,1266,1289]" gridcol="0" gridrow="3" pageId="4" pageNumber="215">Length to end of anal fin (LEA)</th>
<td box="[597,865,1266,1289]" gridcol="1" gridrow="3" pageId="4" pageNumber="215">100199</td>
<td box="[932,1193,1266,1289]" gridcol="2" gridrow="3" pageId="4" pageNumber="215">63212</td>
<td box="[1261,1528,1266,1289]" gridcol="3" gridrow="3" pageId="4" pageNumber="215">62235</td>
</tr>
<tr box="[142,1528,1295,1318]" gridrow="4" pageId="4" pageNumber="215">
<th box="[142,529,1295,1318]" gridcol="0" gridrow="4" pageId="4" pageNumber="215">Anal-fin base (AFB)</th>
<td box="[597,865,1295,1318]" gridcol="1" gridrow="4" pageId="4" pageNumber="215">86168</td>
<td box="[932,1193,1295,1318]" gridcol="2" gridrow="4" pageId="4" pageNumber="215">54176</td>
<td box="[1261,1528,1295,1318]" gridcol="3" gridrow="4" pageId="4" pageNumber="215">53203</td>
</tr>
<tr box="[142,1528,1324,1347]" gridrow="5" pageId="4" pageNumber="215">
<th box="[142,529,1324,1347]" gridcol="0" gridrow="5" pageId="4" pageNumber="215">Caudal appendage length (CL)</th>
<td box="[597,865,1324,1347]" gridcol="1" gridrow="5" pageId="4" pageNumber="215">
1151 (
<emphasis box="[732,745,1324,1347]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 32)
</td>
<td box="[932,1193,1324,1347]" gridcol="2" gridrow="5" pageId="4" pageNumber="215">
165 (
<emphasis box="[1057,1070,1324,1347]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 56)
</td>
<td box="[1261,1528,1324,1347]" gridcol="3" gridrow="5" pageId="4" pageNumber="215">
1091 (
<emphasis box="[1396,1409,1324,1347]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 49)
</td>
</tr>
<tr box="[142,1528,1353,1376]" gridrow="6" pageId="4" pageNumber="215">
<th box="[142,529,1353,1376]" gridcol="0" gridrow="6" pageId="4" pageNumber="215">Tail depth (TD)</th>
<td box="[597,865,1353,1376]" gridcol="1" gridrow="6" pageId="4" pageNumber="215">0.75.4</td>
<td box="[932,1193,1353,1376]" gridcol="2" gridrow="6" pageId="4" pageNumber="215">0.55.0</td>
<td box="[1261,1528,1353,1376]" gridcol="3" gridrow="6" pageId="4" pageNumber="215">0.43.5</td>
</tr>
<tr box="[142,1528,1381,1404]" gridrow="7" pageId="4" pageNumber="215">
<th box="[142,529,1381,1404]" gridcol="0" gridrow="7" pageId="4" pageNumber="215">Head length (HL)</th>
<td box="[597,865,1381,1404]" gridcol="1" gridrow="7" pageId="4" pageNumber="215">14.227</td>
<td box="[932,1193,1381,1404]" gridcol="2" gridrow="7" pageId="4" pageNumber="215">10.337.5</td>
<td box="[1261,1528,1381,1404]" gridcol="3" gridrow="7" pageId="4" pageNumber="215">8.638.5</td>
</tr>
<tr box="[142,1528,1410,1433]" gridrow="8" pageId="4" pageNumber="215">
<th box="[142,529,1410,1433]" gridcol="0" gridrow="8" pageId="4" pageNumber="215">Length to origin of dorsal organ (LOD)</th>
<td box="[597,865,1410,1433]" gridcol="1" gridrow="8" pageId="4" pageNumber="215">64134</td>
<td box="[932,1193,1410,1433]" gridcol="2" gridrow="8" pageId="4" pageNumber="215">31148</td>
<td box="[1261,1528,1410,1433]" gridcol="3" gridrow="8" pageId="4" pageNumber="215">43152</td>
</tr>
<tr box="[142,1528,1439,1462]" gridrow="9" pageId="4" pageNumber="215">
<th box="[142,529,1439,1462]" gridcol="0" gridrow="9" pageId="4" pageNumber="215">Body depth/LOD</th>
<td box="[597,865,1439,1462]" gridcol="1" gridrow="9" pageId="4" pageNumber="215">0.22 (0.190.25)</td>
<td box="[932,1193,1439,1462]" gridcol="2" gridrow="9" pageId="4" pageNumber="215">0.22 (0.170.31)</td>
<td box="[1261,1528,1439,1462]" gridcol="3" gridrow="9" pageId="4" pageNumber="215">0.18 (0.140.22)</td>
</tr>
<tr box="[142,1528,1467,1490]" gridrow="10" pageId="4" pageNumber="215">
<th box="[142,529,1467,1490]" gridcol="0" gridrow="10" pageId="4" pageNumber="215">Prepectoral length/LOD</th>
<td box="[597,865,1467,1490]" gridcol="1" gridrow="10" pageId="4" pageNumber="215">0.24 (0.210.28)</td>
<td box="[932,1193,1467,1490]" gridcol="2" gridrow="10" pageId="4" pageNumber="215">0.28 (0.220.40)</td>
<td box="[1261,1528,1467,1490]" gridcol="3" gridrow="10" pageId="4" pageNumber="215">0.24 (0.210.30)</td>
</tr>
<tr box="[142,1528,1496,1519]" gridrow="11" pageId="4" pageNumber="215">
<th box="[142,529,1496,1519]" gridcol="0" gridrow="11" pageId="4" pageNumber="215">Preanal length/LOD</th>
<td box="[597,865,1496,1519]" gridcol="1" gridrow="11" pageId="4" pageNumber="215">0.22 (0.140.27)</td>
<td box="[932,1193,1496,1519]" gridcol="2" gridrow="11" pageId="4" pageNumber="215">0.26 (0.180.33)</td>
<td box="[1261,1528,1496,1519]" gridcol="3" gridrow="11" pageId="4" pageNumber="215">0.23 (0.20.29)</td>
</tr>
<tr box="[142,1528,1525,1548]" gridrow="12" pageId="4" pageNumber="215">
<th box="[142,529,1525,1548]" gridcol="0" gridrow="12" pageId="4" pageNumber="215">Snout-anus length/HL</th>
<td box="[597,865,1525,1548]" gridcol="1" gridrow="12" pageId="4" pageNumber="215">0.57 (0.340.72)</td>
<td box="[932,1193,1525,1548]" gridcol="2" gridrow="12" pageId="4" pageNumber="215">0.67 (0.430.94)</td>
<td box="[1261,1528,1525,1548]" gridcol="3" gridrow="12" pageId="4" pageNumber="215">0.68 (0.401.0)</td>
</tr>
<tr box="[142,1528,1553,1576]" gridrow="13" pageId="4" pageNumber="215">
<th box="[142,529,1553,1576]" gridcol="0" gridrow="13" pageId="4" pageNumber="215">Pectoral fin length/HL</th>
<td box="[597,865,1553,1576]" gridcol="1" gridrow="13" pageId="4" pageNumber="215">0.77 (0.620.90)</td>
<td box="[932,1193,1553,1576]" gridcol="2" gridrow="13" pageId="4" pageNumber="215">0.72 (0.570.93)</td>
<td box="[1261,1528,1553,1576]" gridcol="3" gridrow="13" pageId="4" pageNumber="215">0.71 (0.550.91)</td>
</tr>
<tr box="[142,1528,1582,1605]" gridrow="14" pageId="4" pageNumber="215">
<th box="[142,529,1582,1605]" gridcol="0" gridrow="14" pageId="4" pageNumber="215">Head depth at opercle/HL</th>
<td box="[597,865,1582,1605]" gridcol="1" gridrow="14" pageId="4" pageNumber="215">0.76 (0.670.86)</td>
<td box="[932,1193,1582,1605]" gridcol="2" gridrow="14" pageId="4" pageNumber="215">0.67 (0.520.77)</td>
<td box="[1261,1528,1582,1605]" gridcol="3" gridrow="14" pageId="4" pageNumber="215">0.65 (0.530.74)</td>
</tr>
<tr box="[142,1528,1611,1634]" gridrow="15" pageId="4" pageNumber="215">
<th box="[142,529,1611,1634]" gridcol="0" gridrow="15" pageId="4" pageNumber="215">Head depth at eye/HL</th>
<td box="[597,865,1611,1634]" gridcol="1" gridrow="15" pageId="4" pageNumber="215">0.50 (0.420.55)</td>
<td box="[932,1193,1611,1634]" gridcol="2" gridrow="15" pageId="4" pageNumber="215">0.43 (0.360.51)</td>
<td box="[1261,1528,1611,1634]" gridcol="3" gridrow="15" pageId="4" pageNumber="215">0.43 (0.360.57)</td>
</tr>
<tr box="[142,1528,1640,1663]" gridrow="16" pageId="4" pageNumber="215">
<th box="[142,529,1640,1663]" gridcol="0" gridrow="16" pageId="4" pageNumber="215">Head width/HL</th>
<td box="[597,865,1640,1663]" gridcol="1" gridrow="16" pageId="4" pageNumber="215">0.48 (0.370.53)</td>
<td box="[932,1193,1640,1663]" gridcol="2" gridrow="16" pageId="4" pageNumber="215">0.40 (0.310.47)</td>
<td box="[1261,1528,1640,1663]" gridcol="3" gridrow="16" pageId="4" pageNumber="215">0.40 (0.330.51)</td>
</tr>
<tr box="[142,1528,1668,1691]" gridrow="17" pageId="4" pageNumber="215">
<th box="[142,529,1668,1691]" gridcol="0" gridrow="17" pageId="4" pageNumber="215">Snout length/HL</th>
<td box="[597,865,1668,1691]" gridcol="1" gridrow="17" pageId="4" pageNumber="215">0.35 (0.310.39)</td>
<td box="[932,1193,1668,1691]" gridcol="2" gridrow="17" pageId="4" pageNumber="215">0.38 (0.320.44)</td>
<td box="[1261,1528,1668,1691]" gridcol="3" gridrow="17" pageId="4" pageNumber="215">0.38 (0.300.45)</td>
</tr>
<tr box="[142,1528,1697,1720]" gridrow="18" pageId="4" pageNumber="215">
<th box="[142,529,1697,1720]" gridcol="0" gridrow="18" pageId="4" pageNumber="215">Postorbital/HL</th>
<td box="[597,865,1697,1720]" gridcol="1" gridrow="18" pageId="4" pageNumber="215">0.65 (0.590.74)</td>
<td box="[932,1193,1697,1720]" gridcol="2" gridrow="18" pageId="4" pageNumber="215">0.58 (0.510.63)</td>
<td box="[1261,1528,1697,1720]" gridcol="3" gridrow="18" pageId="4" pageNumber="215">0.58 (0.530.63)</td>
</tr>
<tr box="[142,1528,1726,1749]" gridrow="19" pageId="4" pageNumber="215">
<th box="[142,529,1726,1749]" gridcol="0" gridrow="19" pageId="4" pageNumber="215">Gape length/HL</th>
<td box="[597,865,1726,1749]" gridcol="1" gridrow="19" pageId="4" pageNumber="215">0.23 (0.160.31)</td>
<td box="[932,1193,1726,1749]" gridcol="2" gridrow="19" pageId="4" pageNumber="215">0.33 (0.230.50)</td>
<td box="[1261,1528,1726,1749]" gridcol="3" gridrow="19" pageId="4" pageNumber="215">0.28 (0.150.43)</td>
</tr>
<tr box="[142,1528,1754,1777]" gridrow="20" pageId="4" pageNumber="215">
<th box="[142,529,1754,1777]" gridcol="0" gridrow="20" pageId="4" pageNumber="215">Eye diameter/Postorbital length (PO)</th>
<td box="[597,865,1754,1777]" gridcol="1" gridrow="20" pageId="4" pageNumber="215">0.13 (0.100.23)</td>
<td box="[932,1193,1754,1777]" gridcol="2" gridrow="20" pageId="4" pageNumber="215">0.14 (0.090.20)</td>
<td box="[1261,1528,1754,1777]" gridcol="3" gridrow="20" pageId="4" pageNumber="215">0.14 (0.090.19)</td>
</tr>
<tr box="[142,1528,1783,1806]" gridrow="21" pageId="4" pageNumber="215">
<th box="[142,529,1783,1806]" gridcol="0" gridrow="21" pageId="4" pageNumber="215">Posterior naris-snout/PO</th>
<td box="[597,865,1783,1806]" gridcol="1" gridrow="21" pageId="4" pageNumber="215">0.37 (0.310.43)</td>
<td box="[932,1193,1783,1806]" gridcol="2" gridrow="21" pageId="4" pageNumber="215">0.40 (0.220.49)</td>
<td box="[1261,1528,1783,1806]" gridcol="3" gridrow="21" pageId="4" pageNumber="215">0.42 (0.270.49)</td>
</tr>
<tr box="[142,1528,1812,1835]" gridrow="22" pageId="4" pageNumber="215">
<th box="[142,529,1812,1835]" gridcol="0" gridrow="22" pageId="4" pageNumber="215">Posterior naris-eye/PO</th>
<td box="[597,865,1812,1835]" gridcol="1" gridrow="22" pageId="4" pageNumber="215">0.18 (0.110.24)</td>
<td box="[932,1193,1812,1835]" gridcol="2" gridrow="22" pageId="4" pageNumber="215">0.25 (0.140.45</td>
<td box="[1261,1528,1812,1835]" gridcol="3" gridrow="22" pageId="4" pageNumber="215">0.22 (0.100.42)</td>
</tr>
<tr box="[142,1528,1840,1863]" gridrow="23" pageId="4" pageNumber="215">
<th box="[142,529,1840,1863]" gridcol="0" gridrow="23" pageId="4" pageNumber="215">Internarial distance/PO</th>
<td box="[597,865,1840,1863]" gridcol="1" gridrow="23" pageId="4" pageNumber="215">0.23 (0.170.28)</td>
<td box="[932,1193,1840,1863]" gridcol="2" gridrow="23" pageId="4" pageNumber="215">0.25 (0.200.32)</td>
<td box="[1261,1528,1840,1863]" gridcol="3" gridrow="23" pageId="4" pageNumber="215">0.25 (0.150.30)</td>
</tr>
<tr box="[142,1528,1869,1892]" gridrow="24" pageId="4" pageNumber="215">
<th box="[142,529,1869,1892]" gridcol="0" gridrow="24" pageId="4" pageNumber="215">Interocular width/PO</th>
<td box="[597,865,1869,1892]" gridcol="1" gridrow="24" pageId="4" pageNumber="215">0.30 (0.200.37)</td>
<td box="[932,1193,1869,1892]" gridcol="2" gridrow="24" pageId="4" pageNumber="215">0.27 (0.170.37)</td>
<td box="[1261,1528,1869,1892]" gridcol="3" gridrow="24" pageId="4" pageNumber="215">0.26 (0.170.31)</td>
</tr>
<tr box="[142,1528,1898,1921]" gridrow="25" pageId="4" pageNumber="215">
<th box="[142,529,1898,1921]" gridcol="0" gridrow="25" pageId="4" pageNumber="215">Branchial opening/PO</th>
<td box="[597,865,1898,1921]" gridcol="1" gridrow="25" pageId="4" pageNumber="215">0.34 (0.270.40)</td>
<td box="[932,1193,1898,1921]" gridcol="2" gridrow="25" pageId="4" pageNumber="215">0.31 (0.210.40)</td>
<td box="[1261,1528,1898,1921]" gridcol="3" gridrow="25" pageId="4" pageNumber="215">0.28 (0.170.39)</td>
</tr>
<tr box="[142,1528,1926,1949]" gridrow="26" pageId="4" pageNumber="215">
<th box="[142,529,1926,1949]" gridcol="0" gridrow="26" pageId="4" pageNumber="215">Body width/PO</th>
<td box="[597,865,1926,1949]" gridcol="1" gridrow="26" pageId="4" pageNumber="215">0.52 (0.400.71)</td>
<td box="[932,1193,1926,1949]" gridcol="2" gridrow="26" pageId="4" pageNumber="215">0.48 (0.350.60)</td>
<td box="[1261,1528,1926,1949]" gridcol="3" gridrow="26" pageId="4" pageNumber="215">0.47 (0.290.63)</td>
</tr>
<tr box="[142,1528,1955,1978]" gridrow="27" pageId="4" pageNumber="215">
<th box="[142,529,1955,1978]" gridcol="0" gridrow="27" pageId="4" pageNumber="215">Anal-fin rays</th>
<td box="[597,865,1955,1978]" gridcol="1" gridrow="27" pageId="4" pageNumber="215">
167 (155174) (
<emphasis box="[780,793,1955,1978]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 16)
</td>
<td box="[932,1193,1955,1978]" gridcol="2" gridrow="27" pageId="4" pageNumber="215">
170 (152185) (
<emphasis box="[1116,1129,1955,1978]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼10)
</td>
<td box="[1261,1528,1955,1978]" gridcol="3" gridrow="27" pageId="4" pageNumber="215">
195 (164210) (
<emphasis box="[1444,1457,1955,1978]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 24)
</td>
</tr>
<tr box="[142,1528,1984,2007]" gridrow="28" pageId="4" pageNumber="215">
<th box="[142,529,1984,2007]" gridcol="0" gridrow="28" pageId="4" pageNumber="215">Pectoral-fin rays</th>
<td box="[597,865,1984,2007]" gridcol="1" gridrow="28" pageId="4" pageNumber="215">
16 (
<emphasis box="[718,731,1984,2007]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 5)
</td>
<td box="[932,1193,1984,2007]" gridcol="2" gridrow="28" pageId="4" pageNumber="215">
16 (
<emphasis box="[1043,1056,1984,2007]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 10)
</td>
<td box="[1261,1528,1984,2007]" gridcol="3" gridrow="28" pageId="4" pageNumber="215">
16 (
<emphasis box="[1382,1395,1984,2007]" italics="true" pageId="4" pageNumber="215">n</emphasis>
¼ 6)
</td>
</tr>
</table>
</paragraph>
<paragraph blockId="5.[103,773,131,1619]" pageId="5" pageNumber="216">
Lower jaw triangular, slightly longer than deep (
<figureCitation box="[679,761,306,329]" captionStart="Fig. 4" captionStartId="3.[1139,1167,1444,1464]" captionTargetBox="[103,1093,1434,1845]" captionTargetId="figure@3.[103,1093,1434,1846]" captionTargetPageId="3" captionText="Fig. 4. Lateral view of neurocranium (A) and suspensorium and oral jaws (B) of Compsaraia iara, FMNH 115028, 208 mm TL. Cartilage shown in gray. Abbreviations: (A) bao, basioccipital; epo, epioccipital; exo, exoccipital; fro, frontal; let, lateral ethmoid; met, mesethmoid; obs, orbitosphenoid; par, parietal; pas, parasphenoid; pro, prootic; pto, pterotic; pts, pterosphenoid; soc, supraoccipital; spo, sphenotic; vet, ventral ethmoid; (B) aar, anguloarticular; ap, autopalatine cartilage; d, dentary; enp, endopterygoid; hm, hyomandibular; iop, interopercle; max, maxilla (detached from suspensorium); mco, mandibular canal ossicles; mpt, metapterygoid; op, opercle; pmx, premaxilla (in ventral view); pop, preopercle; q, quadrate; rar, retroarticular; sop, subopercle; sym, symplectic." httpUri="https://zenodo.org/record/1048348/files/figure.png" pageId="5" pageNumber="216">Fig. 4B</figureCitation>
). Ten to 14 conical teeth arranged in single, uneven row on anterior half of dentary. Anterior process of retroarticular overlapping with descending process of dentary. Mandibular canal bones ossified as five short, broad ossicles. Three ossicles below dentary, two below preopercle. Endopterygoid edentulous with robust, anteriorly angled ascending process slightly anterior to midlength of bone. Metapterygoid triangular with all sides roughly equal in length. Hyomandibula angled posteriorly, oriented at roughly 1 2 0° to horizontal cranium axis, broad articulating head roughly twice diameter of distal end. Preopercle oriented vertically, rounded ventrally with narrow anterior process articulating with quadrate. Opercle with slightly concave dorsal margin and rounded posterior margin.
</paragraph>
<paragraph blockId="5.[103,773,131,1619]" pageId="5" pageNumber="216">Gill rakers ossified, not contacting gill arch. Basihyal with weakly developed ridge on posterior dorsal surface. Basibranchial 2 approximately hourglass-shaped with slightly broader anterior half. Basibranchials 35 unossified. Hypobranchials 1 and 3 triangular in dorsal view, hypobranchials 2 joined by medial processes (Albert, 2001:fig. 32B), hypobranchials 4 and 6 unossified. Pharyngobranchials 24 ossified, epibranchials 3 and 4 shallowly forked. Ceratobranchial 5 with 13 16 long teeth arranged in two irregular rows. Dentigerous plate of epibranchial 4 with 13 tightly grouped conical teeth.</paragraph>
<paragraph blockId="5.[103,773,131,1619]" pageId="5" pageNumber="216">Posttemporal broad and flat dorsal to region of overlapping contact with supracleithrum, then tapering to sharp point. Broadened region bears short, wide, anteriorly angled canal. Supracleithrum elongate with long overlapping articulation with cleithrum and dorsolateral hook. Anteroventral process of coracoid thin and elongate, reaching ventral cleithral margin. Mesocoracoid not ossified. Four independently ossified proximal radials. First radial articulated with first pectoral-fin ray. Sixteen pectoral-fin rays, first ray, about one fourth length of remaining rays.</paragraph>
<paragraph blockId="5.[103,773,131,1619]" pageId="5" pageNumber="216">
Body cavity short with 14 (
<emphasis box="[427,441,1334,1355]" italics="true" pageId="5" pageNumber="216">n</emphasis>
¼ 5) precaudal vertebrae. First rib broadened proximally with concave anterior surface. Two displaced hemal spines. Anterior displaced hemal spine long and sickle-shaped, following posterior and ventral margin of body cavity to about third rib. One posterior displaced hemal spine, roughly same length of other hemal spines, angled anteriorly. Anal-fin pterygiophores slightly longer than hemal spines, and broadened near distal tip. Median number of anal-fin rays 167 (
<emphasis box="[327,341,1568,1589]" italics="true" pageId="5" pageNumber="216">n</emphasis>
¼ 16, range: 155174). Caudal fin small and lanceolate with 14 rays.
</paragraph>
<paragraph blockId="5.[103,773,1650,2024]" lastBlockId="5.[820,1490,130,243]" pageId="5" pageNumber="216">
<emphasis bold="true" box="[103,191,1650,1673]" italics="true" pageId="5" pageNumber="216">Color.—</emphasis>
White to pale pink ground color in living specimens, with brighter pink over anal-fin pterygiophores. Dense grayish brown chromatophores over dorsum and nape, becoming diffuse at lateral line. Pigment limited to posterior scale margins, giving lightly mottled pattern in regions with large scales. Anterior dorsum and head speckled with pale tuberous electroreceptors. Faint vertical lines of chromatophores often present between anal-fin pterygiophores. Dorsal surface of head and cheeks pigmented. Underside of head and lower jaws pale, with white in areas overlying mandibular canal bones. Upper lip with narrow depigmented patch extending dorsally over nares, anterior to eye. Subdermal laterosensory canals visible as pale C- or L-shaped lines on nape (see
<figureCitation box="[943,1027,130,153]" captionStart="Fig. 3" captionStartId="3.[103,131,1088,1108]" captionTargetBox="[103,1490,130,1058]" captionTargetId="figure@3.[103,1490,130,1058]" captionTargetPageId="3" captionText="Fig. 3. Detail of head and pigmentation for Compsaraia samueli (top), MUSM 37172, 241 mm TL, and Compsaraia iara, FMNH 128428, 235 mm TL in lateral view (A), dorsal view (B), and ventral view (C). Scale bar equals 1 cm." httpUri="https://zenodo.org/record/1048346/files/figure.png" pageId="5" pageNumber="216">Fig. 3B</figureCitation>
). Midsaggital dorsal organ lighter graybrown than anterior dorsum. Pectoral, anal, and caudal fins hyaline. In alcohol-preserved specimens, coloration much as in life, but ground color becomes pale cream-yellow.
</paragraph>
</subSubSection>
<subSubSection pageId="5" pageNumber="216" type="distribution">
<paragraph blockId="5.[820,1490,273,741]" pageId="5" pageNumber="216">
<emphasis bold="true" box="[820,976,273,296]" italics="true" pageId="5" pageNumber="216">Distribution.—</emphasis>
Widespread in the Brazilian Amazon River and near the mouths of its larger tributaries. The furthest upstream that this species has been reported is near the mouth of the Rio Içá. Trawl sampling by the authors and colleagues in the Peruvian Amazon has not resulted in any additional specimens. Two lots (
<emphasis box="[1182,1196,423,444]" italics="true" pageId="5" pageNumber="216">n</emphasis>
¼ 2 specimens each) were collected near the mouth of the Rio Branco, Roraima, Brazil, but none are reported from the Rio Negro or other blackwater rivers. In addition to those specimens listed under materials examined, 17 collection localities were reported by
<bibRefCitation author="Cox Fernandes, C." journalOrPublisher="Duke University, Durham, North Carolina" pageId="5" pageNumber="216" refString="Cox Fernandes, C. 1995. Diversity, distribution, and community structure of electric fishes (Gymnotiformes) in the channels of the Amazon River system, Brazil. Unpubl. Ph. D. diss., Duke University, Durham, North Carolina." title="Diversity, distribution, and community structure of electric fishes (Gymnotiformes) in the channels of the Amazon River system, Brazil. Unpubl. Ph. D. diss" type="book" year="1995">Cox Fernandes (1995)</bibRefCitation>
and are shown on the distribution map in
<figureCitation box="[820,910,600,623]" captionStart="Fig. 6" captionStartId="6.[1178,1206,563,583]" captionTargetBox="[142,1131,131,710]" captionTargetId="figure@6.[142,1131,131,710]" captionTargetPageId="6" captionText="Fig. 6. Collection localities of Compsaraia iara. Star indicates type locality. Some localities not referenced in Material Examined were taken from Cox Fernandes (1995) and Crampton and Cella-Ribeiro (2013)." httpUri="https://zenodo.org/record/1048352/files/figure.png" pageId="5" pageNumber="216">Figure 6</figureCitation>
. There is an additional report of this species from the vicinity of Teotônio and at Novo Aripuanã on the Rio Madeira (
<bibRefCitation author="Crampton, W. G. R. &amp; A. Cella-Ribeiro" box="[931,1337,659,682]" editor="L. J. de Queiroz" journalOrPublisher="Santo Antonio Energia, Sao Paulo, Brazil" pageId="5" pageNumber="216" pagination="256 - 289" refString="Crampton, W. G. R., and A. Cella-Ribeiro. 2013. Capitulo 44 Apteronotidae, p. 256 - 289. In: Peixes do Rio Madeira. Vol. 3. L. J. de Queiroz, G. Torrente-Vilara, W. M. Ohara, T. H. S. Pires, J. Zuanon, and C. R. C. Doria (eds.). Santo Antonio Energia, Sao Paulo, Brazil." title="Capitulo 44 Apteronotidae" type="book chapter" volumeTitle="Peixes do Rio Madeira. Vol. 3" year="2013">Crampton and Cella-Ribeiro, 2013</bibRefCitation>
). Geographic ranges of congeners
<taxonomicName baseAuthorityName="Mago-Leccia" baseAuthorityYear="1994" box="[1042,1149,690,711]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="5" pageNumber="216" phylum="Chordata" rank="species" species="compsa">
<emphasis box="[1042,1149,690,711]" italics="true" pageId="5" pageNumber="216">
C.
<taxonomicName box="[1072,1149,690,711]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="CoL" kingdom="Animalia" order="Gymnotiformes" pageId="5" pageNumber="216" phylum="Chordata" rank="species" species="compsa">compsa</taxonomicName>
</emphasis>
</taxonomicName>
and
<emphasis box="[1202,1311,689,711]" italics="true" pageId="5" pageNumber="216">C. samueli</emphasis>
are summarized in
<figureCitation box="[851,942,718,741]" captionStart="Fig. 7" captionStartId="6.[1178,1206,1869,1889]" captionTargetBox="[142,1131,1439,2018]" captionTargetId="figure@6.[142,1131,1438,2018]" captionTargetPageId="6" captionText="Fig. 7. Collection localities of Compsaraia compsa (triangles) and Compsaraia samueli (squares). Some single points indicate more than one lot or collection from proximate localities." httpUri="https://zenodo.org/record/1048354/files/figure.png" pageId="5" pageNumber="216">Figure 7</figureCitation>
.
</paragraph>
</subSubSection>
<subSubSection pageId="5" pageNumber="216" type="biology_ecology">
<paragraph blockId="5.[820,1490,772,1210]" pageId="5" pageNumber="216">
<emphasis bold="true" box="[820,932,772,795]" italics="true" pageId="5" pageNumber="216">Ecology.—</emphasis>
Specimens of
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[1088,1161,773,794]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="5" pageNumber="216" phylum="Chordata" rank="species" species="iara">
<emphasis box="[1088,1161,773,794]" italics="true" pageId="5" pageNumber="216">C. iara</emphasis>
</taxonomicName>
examined in this study were collected from white waters at depths ranging from two to 30 meters. Gut contents of several specimens collected in the Amazon River near the mouth of the Rio Xingu were exclusively composed of dipteran (
<taxonomicName box="[1216,1407,891,914]" class="Insecta" family="Ceratopogonidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Diptera" pageId="5" pageNumber="216" phylum="Arthropoda" rank="family">Ceratopogonidae</taxonomicName>
) larvae mixed with very fine sand, suggesting this species is a benthic forager. No secondary sexual dimorphism has been observed in this species, although the closely related
<emphasis italics="true" pageId="5" pageNumber="216">C. samueli</emphasis>
is known to have pronounced sexual dimorphism of the snout and jaws (
<bibRefCitation author="Albert, J. S. &amp; W. G. R. Crampton" box="[1049,1364,1039,1062]" journalOrPublisher="Systematics and Biodiversity" pageId="5" pageNumber="216" pagination="81 - 92" part="7" refString="Albert, J. S., and W. G. R. Crampton. 2009. A new species of electric knifefish, genus Compsaraia (Gymnotiformes: Apteronotidae) from the Amazon River, with extreme sexual dimorphism in snout and jaw length. Systematics and Biodiversity 7: 81 - 92." title="A new species of electric knifefish, genus Compsaraia (Gymnotiformes: Apteronotidae) from the Amazon River, with extreme sexual dimorphism in snout and jaw length" type="journal article" year="2009">Albert and Crampton, 2009</bibRefCitation>
). Considering that mature male specimens of
<emphasis box="[1251,1368,1069,1091]" italics="true" pageId="5" pageNumber="216">C. samueli</emphasis>
are rarely captured using conventional sampling methods, a more extensive examination of the gonads of
<taxonomicName authorityName="Maxwell J. Bernt &amp; James S. Albert" authorityYear="2017" box="[1271,1343,1129,1150]" class="Actinopterygii" family="Apteronotidae" genus="Compsaraia" higherTaxonomySource="GBIF" kingdom="Animalia" order="Gymnotiformes" pageId="5" pageNumber="216" phylum="Chordata" rank="species" species="iara">
<emphasis box="[1271,1343,1129,1150]" italics="true" pageId="5" pageNumber="216">C. iara</emphasis>
</taxonomicName>
or collection of reproductive specimens during high water will be needed to confirm the absence of dimorphism.
</paragraph>
</subSubSection>
<subSubSection pageId="5" pageNumber="216" type="etymology">
<paragraph blockId="5.[820,1490,1241,1353]" pageId="5" pageNumber="216">
<emphasis bold="true" box="[820,961,1241,1264]" italics="true" pageId="5" pageNumber="216">Etymology.—</emphasis>
This species is named for the Iara, a water nymph from Tupi-Brazilian folklore said to reside in the rivers of the Brazilian Amazon and often blamed for the disappearance of fishermen. A noun in apposition.
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