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<mods:title id="6D7769B7779C90B76B2F10DC8FD13EED">The forgotten diversity of the genus Myxicola (Polychaeta: Sabellidae) in North America: redescription of historical taxa and description of two new species</mods:title>
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<mods:namePart id="1F83531A0982566A77A2AA272853A8FF">Langeneck, Joachim</mods:namePart>
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<mods:namePart id="475325AB27A087BF1413355D0DC3DC04">Giangrande, Adriana</mods:namePart>
<mods:affiliation id="041087FE22ADEC8381F23BD13C5CF7C3">DiSTeBA, University of Salento, Lecce, Italy; &amp; CoNISMa, Consorzio Nazionale Interuniversitario per le Scienze del Mare, Lecce, Italy</mods:affiliation>
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<mods:date id="85FD5A605459AEE4C1935245D061D499">2024</mods:date>
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<taxonomicName id="4FCF4D26FFCEFFD8FE725E8B9074FD5E" ID-CoL="45GXY" authority="Bush, 1905" authorityName="Bush" authorityYear="1905" box="[489,825,692,718]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="22" pageNumber="1415" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFCEFFD8FE725E8B91FFFD5E" box="[489,690,692,718]" italics="true" pageId="22" pageNumber="1415">Myxicola glacialis</emphasis>
<bibRefCitation id="EC5E4B54FFCEFFD8FD225E8B9074FD5E" author="Bush KJ" box="[697,825,692,718]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush, 1905</bibRefCitation>
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(
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,
<figureCitation id="10F42A20FFCEFFD8FD5C5EDD91A9FD6C" box="[711,740,738,764]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="22" pageNumber="1415">12</figureCitation>
)
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<treatmentCitation id="096E10B4FFCEFFD8FF5B5F289107FCA0" author="Bush KJ" box="[192,586,791,816]" page="218" pageId="22" pageNumber="1415" year="1905">
<taxonomicName id="4FCF4D26FFCEFFD8FF5B5F289107FCA0" ID-CoL="45GXY" authority="Bush, 1905: p. 218" authorityName="Bush" authorityPageNumber="218" authorityYear="1905" box="[192,586,791,816]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="22" pageNumber="1415" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFCEFFD8FF5B5F289231FCA0" box="[192,380,791,816]" italics="true" pageId="22" pageNumber="1415">Myxicola glacialis</emphasis>
<bibRefCitation id="EC5E4B54FFCEFFD8FE195F2892B6FCA0" author="Bush KJ" box="[386,507,791,816]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush, 1905</bibRefCitation>
: p. 218
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219 pl. XXII, fig. 1; pl. XXV, figs. 1, 2; pl. XXVI, fig. 4b; pl. XXXVIII, figs. 12, 23, 2532.
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<emphasis id="BABBEAB7FFCEFFD8FF3B5FBB9232FC0E" bold="true" box="[160,383,900,926]" italics="true" pageId="22" pageNumber="1415">Material examined</emphasis>
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: collected by W.
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,
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Alaska
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, 1899,
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,
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Aleutians
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; preserved in 70% ethanol
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.
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: collected by W.
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.
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,
<location id="8D10607EFFCEFFD8FCD25FD390FCFB95" LSID="urn:lsid:plazi:treatment:006687B3FFCEFFD4FE725E8B9196FC02:8D10607EFFCEFFD8FCD25FD390FCFB95" box="[841,945,1004,1029]" country="United States of America" county="Dutch Harbour" municipality="Unalaska Island" name="Harriman" pageId="22" pageNumber="1415" stateProvince="Alaska">Harriman</location>
Alaska
<location id="8D10607EFFCEFFD8FB9D5FD397CDFB95" LSID="urn:lsid:plazi:treatment:006687B3FFCEFFD4FE725E8B9196FC02:8D10607EFFCEFFD8FB9D5FD397CDFB95" box="[1030,1152,1004,1029]" country="United States of America" county="Dutch Harbour" municipality="Unalaska Island" name="Expedition" pageId="22" pageNumber="1415" stateProvince="Alaska">Expedition</location>
, 1899,
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,
<location id="8D10607EFFCEFFD8FE1F58309164FBB8" LSID="urn:lsid:plazi:treatment:006687B3FFCEFFD4FE725E8B9196FC02:8D10607EFFCEFFD8FE1F58309164FBB8" box="[388,553,1039,1064]" country="United States of America" county="Dutch Harbour" municipality="Unalaska Island" name="North America" pageId="22" pageNumber="1415" stateProvince="Alaska">North America</location>
,
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,
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Aleutians
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,
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,
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, preserved in 70% ethanol
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.
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<emphasis id="BABBEAB7FFCEFFD8FF3B58439147FB06" bold="true" box="[160,522,1148,1174]" italics="true" pageId="22" pageNumber="1415">Redescription (YPM IZ 106540)</emphasis>
</paragraph>
<paragraph id="887036A5FFCEFFD6FF3B58A09776FCEF" blockId="22.[160,1156,1148,1728]" lastBlockId="24.[160,1156,142,895]" lastPageId="24" lastPageNumber="1417" pageId="22" pageNumber="1415">
Specimen complete, body orange yellowish (
<figureCitation id="10F42A20FFCEFFD8FD0958A09044FB28" box="[658,777,1183,1208]" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="22" pageNumber="1415">Figure 11A</figureCitation>
); photos from original description (
<bibRefCitation id="EC5E4B54FFCEFFD8FF3D58FD9252FB4B" author="Bush KJ" box="[166,287,1218,1243]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
) show distinctly darker anterior end (
<bibRefCitation id="EC5E4B54FFCEFFD8FD4B58FD9004FB4B" author="Bush KJ" box="[720,841,1218,1243]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
, fig. 13A1, A2); the original description reports […] the body of usual cream color, the thoracic region and the branchiae colored with deep purple having a tinge of brown and In life white or yellowish with brown purple branchiae (
<bibRefCitation id="EC5E4B54FFCEFFD8FDE2591591BEFAD3" author="Bush KJ" box="[633,755,1322,1347]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
: p. 218219). Body dorso-ventrally flattened, with distinctly narrower and elongated posterior abdomen. Crown slightly darker than body (
<figureCitation id="10F42A20FFCEFFD8FE1F5950914BFA18" box="[388,518,1391,1416]" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="22" pageNumber="1415">Figure 11A</figureCitation>
); photos from original description (
<bibRefCitation id="EC5E4B54FFCEFFD8FC2E5950977EFA18" author="Bush KJ" box="[949,1075,1391,1416]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
) show distinctly darker crown (
<bibRefCitation id="EC5E4B54FFCEFFD8FE2A59AD9165FA3B" author="Bush KJ" box="[433,552,1426,1451]" pageId="22" pageNumber="1415" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
, fig. 13A1, A2). Body
<quantity id="4F379B40FFCEFFD8FC8059AD9039FA3B" box="[795,884,1426,1451]" metricMagnitude="-2" metricUnit="m" metricValue="3.32" pageId="22" pageNumber="1415" unit="cm" value="3.32">3.32 cm</quantity>
long, 3 thoracic and 68 abdominal chaetigers; maximum width
<quantity id="4F379B40FFCEFFD8FDFA598A91EBFA5E" box="[609,678,1461,1486]" metricMagnitude="-3" metricUnit="m" metricValue="3.0" pageId="22" pageNumber="1415" unit="mm" value="3.0">3 mm</quantity>
; thorax longer than wide. Crown
<quantity id="4F379B40FFCEFFD8FBBB598A97CEFA5E" box="[1056,1155,1461,1486]" metricMagnitude="-3" metricUnit="m" metricValue="5.16" pageId="22" pageNumber="1415" unit="mm" value="5.16">5.16 mm</quantity>
long, with 11 pairs of radioles; ratio body/crown length 6.43. Peristomium
<quantity id="4F379B40FFCEFFD8FC7959E89709FA60" box="[994,1092,1495,1520]" metricMagnitude="-3" metricUnit="m" metricValue="1.07" pageId="22" pageNumber="1415" unit="mm" value="1.07">1.07 mm</quantity>
long; anterior and posterior peristomial ring separated latero-ventrally by a narrow rut; mid-ventral lobe triangular, low with rounded tip; peristomium laterally high, covering junction between body and crown; mid-lateral incision narrow, with rounded edges (
<figureCitation id="10F42A20FFCEFFD8FBA75A0093A6F9EB" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="22" pageNumber="1415">Figure 11B, C</figureCitation>
). Dorsal and ventral lips and related structures indistinct, as small, flattened discoidal structure or absent (
<figureCitation id="10F42A20FFCEFFD8FE625ABA913BF90E" box="[505,630,1669,1694]" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="22" pageNumber="1415">Figure 11D</figureCitation>
). Outer radiolar surface with yellowish rachis, connected by lighter palmate membrane extending into wide radiolar flanges progressively narrowing on distal halves of radiole tips, strap-like, distally rounded. Radiolar tip &lt;1/4 of total radiole length, same colour as radioles (
<figureCitation id="10F42A20FFC0FFD6FC0F5C8E9740FF5A" box="[916,1037,177,202]" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="24" pageNumber="1417">Figure 11E</figureCitation>
); pinnules thick, distally rounded, yellowish, up to 1/3 of total radiole length, alternating along radioles; longest pinnules distally, slightly shortening to beginning of radiolar tips; radiolar skeleton composed of numerous small cells, apparently arranged randomly, surrounded by a hyaline matrix; graft cells for pinnular skeleton squared and big, undivided, ventrally contiguous to latter (
<figureCitation id="10F42A20FFC0FFD6FD145D619042FEE7" box="[655,783,350,375]" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="24" pageNumber="1417">Figure 11G</figureCitation>
). Radiolar eyes and peristomial eyes not visible. Glandular girdle near the posterior margin of chaetiger 2. Lateral eyes not visible. Pygidium papilliform, distinctly smaller than the last abdominal chaetigers (
<figureCitation id="10F42A20FFC0FFD6FF335DF99253FE4F" box="[168,286,454,479]" captionStart="Figure 11" captionStartId="23.[160,225,1658,1681]" captionTargetBox="[212,1119,147,1622]" captionTargetId="figure-3@23.[193,1123,142,1626]" captionTargetPageId="23" captionText="Figure 11. Myxicola glacialis (YPM IZ 106540). A. entire worm; B, C. peristomial rings, ventral and lateral views, respectively; D. ventral/dorsal lips complex, hardly distinguishable (arrows); E. radiolar tips; F. pygidium; G. scheme of radiolar cross section." figureDoi="http://doi.org/10.5281/zenodo.13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="24" pageNumber="1417">Figure 11F</figureCitation>
); pygidial eyes not visible. Numerous narrowly hooded thoracic notochaetae with distinctly long and tapering tips, arranged circularly to form big tufts, decreasing in number of chaetae per fascicle through thorax; peristomial notochaetae with shorter tips; edge of the hood showing marked serration (
<figureCitation id="10F42A20FFC0FFD6FD045E11907EFDD7" box="[671,819,558,583]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figure 12A, B</figureCitation>
). Thoracic uncini curved, with thick main fang and several small teeth, not reaching half of main fang length (
<figureCitation id="10F42A20FFC0FFD6FBA95E6E93A5FD1D" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figures 12D, F</figureCitation>
,
<figureCitation id="10F42A20FFC0FFD6FF6A5E4B9251FD1D" box="[241,284,628,653]" captionStart="Figure 16" captionStartId="29.[160,225,1202,1225]" captionTargetBox="[163,1147,149,1165]" captionTargetId="figure-128@29.[163,1153,142,1170]" captionTargetPageId="29" captionText="Figure 16. Photographs of thoracic and abdominal uncini, respectively, of American Myxicola species: A, B. M. affinis; C, D. M. glacialis; E, F. M. pacifica." figureDoi="http://doi.org/10.5281/zenodo.13758508" httpUri="https://zenodo.org/record/13758508/files/figure.png" pageId="24" pageNumber="1417">16C</figureCitation>
); in dorsal view secondary teeth seem to form a row on top of main fang, with larger teeth apically, appearing in more than one row in lateral view (
<figureCitation id="10F42A20FFC0FFD6FC3B5EA9975BFD3F" box="[928,1046,662,687]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figure 12E</figureCitation>
); thoracic tori inconspicuous. Numerous abdominal neurochaetae narrowly hooded, similar to thoracic notochaetae but shorter (
<figureCitation id="10F42A20FFC0FFD6FDB65EE391E4FD65" box="[557,681,732,757]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figure 12C</figureCitation>
), forming less conspicuous tufts than on thorax, significantly decreasing in number of chaetae per fascicle along abdomen (
<figureCitation id="10F42A20FFC0FFD6FBA75EC19386FCAA" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figure 12C</figureCitation>
). Abdominal uncini with large tooth, about half of main fang length; second tooth visible in dorsal view, aligned with the latter (
<figureCitation id="10F42A20FFC0FFD6FD585F7B9074FCCD" box="[707,825,836,861]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figure 12I</figureCitation>
); breast squared; main fang shorter than breast; handle vestigial; uncini longer than high (
<figureCitation id="10F42A20FFC0FFD6FCC05F5990B5FCEF" box="[859,1016,870,895]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figures 12GI</figureCitation>
,
<figureCitation id="10F42A20FFC0FFD6FB9A5F599763FCEF" box="[1025,1070,870,895]" captionStart="Figure 16" captionStartId="29.[160,225,1202,1225]" captionTargetBox="[163,1147,149,1165]" captionTargetId="figure-128@29.[163,1153,142,1170]" captionTargetPageId="29" captionText="Figure 16. Photographs of thoracic and abdominal uncini, respectively, of American Myxicola species: A, B. M. affinis; C, D. M. glacialis; E, F. M. pacifica." figureDoi="http://doi.org/10.5281/zenodo.13758508" httpUri="https://zenodo.org/record/13758508/files/figure.png" pageId="24" pageNumber="1417">16D</figureCitation>
).
</paragraph>
</subSubSection>
<caption id="DCB0662DFFCFFFD9FF3B5A4591FFF95C" ID-DOI="http://doi.org/10.5281/zenodo.13758492" ID-Zenodo-Dep="13758492" httpUri="https://zenodo.org/record/13758492/files/figure.png" pageId="23" pageNumber="1416" startId="23.[160,225,1658,1681]" targetBox="[212,1119,147,1622]" targetPageId="23" targetType="figure">
<paragraph id="887036A5FFCFFFD9FF3B5A4591FFF95C" blockId="23.[160,1155,1658,1740]" pageId="23" pageNumber="1416">
<emphasis id="BABBEAB7FFCFFFD9FF3B5A459247F901" bold="true" box="[160,266,1658,1681]" pageId="23" pageNumber="1416">Figure 11.</emphasis>
<taxonomicName id="4FCF4D26FFCFFFD9FE885A4592F0F901" authorityName="Bush" authorityYear="1905" box="[275,445,1658,1681]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="23" pageNumber="1416" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFCFFFD9FE885A4592F0F901" box="[275,445,1658,1681]" italics="true" pageId="23" pageNumber="1416">Myxicola glacialis</emphasis>
</taxonomicName>
(YPM IZ 106540).
<emphasis id="BABBEAB7FFCFFFD9FDE05A4591C7F901" bold="true" box="[635,650,1658,1681]" pageId="23" pageNumber="1416">A</emphasis>
. entire worm;
<emphasis id="BABBEAB7FFCFFFD9FCB95A45907DF901" bold="true" box="[802,816,1658,1681]" pageId="23" pageNumber="1416">B</emphasis>
,
<emphasis id="BABBEAB7FFCFFFD9FCA45A459000F901" bold="true" box="[831,845,1658,1681]" pageId="23" pageNumber="1416">C</emphasis>
. peristomial rings, ventral and lateral views, respectively;
<emphasis id="BABBEAB7FFCFFFD9FE315AA892F7F93E" bold="true" box="[426,442,1687,1710]" pageId="23" pageNumber="1416">D</emphasis>
. ventral/dorsal lips complex, hardly distinguishable (arrows);
<emphasis id="BABBEAB7FFCFFFD9FB845AA89766F93E" bold="true" box="[1055,1067,1687,1710]" pageId="23" pageNumber="1416">E</emphasis>
. radiolar tips;
<emphasis id="BABBEAB7FFCFFFD9FF4B5A8A9391F95C" bold="true" box="[208,220,1717,1740]" pageId="23" pageNumber="1416">F</emphasis>
. pygidium;
<emphasis id="BABBEAB7FFCFFFD9FEC95A8A922FF95C" bold="true" box="[338,354,1717,1740]" pageId="23" pageNumber="1416">G</emphasis>
. scheme of radiolar cross section.
</paragraph>
</caption>
<subSubSection id="C0D5652EFFC0FFD7FF3B5F849289F92F" lastPageId="25" lastPageNumber="1418" pageId="24" pageNumber="1417" type="discussion">
<paragraph id="887036A5FFC0FFD6FF3B5F84924BFC45" blockId="24.[160,1157,955,1709]" box="[160,262,955,981]" pageId="24" pageNumber="1417">
<emphasis id="BABBEAB7FFC0FFD6FF3B5F84924BFC45" bold="true" box="[160,262,955,981]" italics="true" pageId="24" pageNumber="1417">Remarks</emphasis>
</paragraph>
<paragraph id="887036A5FFC0FFD6FF3B5FE19163FAE5" blockId="24.[160,1157,955,1709]" pageId="24" pageNumber="1417">
These specimens were examined to check the validity of
<taxonomicName id="4FCF4D26FFC0FFD6FCF15FE19733FC67" authority="Bush, 1905" authorityName="Bush" authorityYear="1905" box="[874,1150,990,1015]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="24" pageNumber="1417" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC0FFD6FCF15FE190A0FC67" box="[874,1005,990,1015]" italics="true" pageId="24" pageNumber="1417">M. glacialis</emphasis>
<bibRefCitation id="EC5E4B54FFC0FFD6FC615FE19733FC67" author="Bush KJ" box="[1018,1150,990,1015]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush, 1905</bibRefCitation>
</taxonomicName>
. The comparison with the original description is mostly consistent, including measurements. Although
<bibRefCitation id="EC5E4B54FFC0FFD6FE36581B9173FBAD" author="Bush KJ" box="[429,574,1060,1085]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush (1905)</bibRefCitation>
reported the presence of longer and shorter forms (
<bibRefCitation id="EC5E4B54FFC0FFD6FF6158799233FBCF" author="Bush KJ" box="[250,382,1094,1119]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
, fig. 13A1B), they share a slender appearance, due to the progressively tapering abdomen. Differences with respect to the original description concern especially radiolar structures: radiolar tips were described as […] rather short […], even though the morphology reported (both in the text and in the illustration) is consistent with our findings (
<figureCitation id="10F42A20FFC0FFD6FC8658EE90E8FB7A" box="[797,933,1233,1258]" captionStart="Figure 13" captionStartId="26.[160,225,630,653]" captionTargetBox="[163,1153,142,598]" captionTargetId="figure-314@26.[163,1153,142,598]" captionTargetPageId="26" captionText="Figure 13. Original photos of Myxicola specimens analysed by Bush (1905): A1, A2, M. glacialis (short form); B, M. glacialis (long form); C, M. conjuncta; D. radiole of M. conjuncta; E. radiole of M. glacialis. A1 and C, specimens YPM IZ 106540 and YPM IZ 002773, respectively. Photos from Bush 1905." figureDoi="http://doi.org/10.5281/zenodo.13758500" httpUri="https://zenodo.org/record/13758500/files/figure.png" pageId="24" pageNumber="1417">Figure 13E</figureCitation>
), while pinnules, reported as […] well-separated […] (
<bibRefCitation id="EC5E4B54FFC0FFD6FDE558CB91B2FA9D" author="Bush KJ" box="[638,767,1268,1293]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
: p. 219), can be explained by their remarkable thickness. Lastly, the author reports the presence of abdominal tori forming a complete girdle around the body from the 12th abdominal segment, which was not confirmed herein.
</paragraph>
<paragraph id="887036A5FFC0FFD6FF5B59419090F93D" blockId="24.[160,1157,955,1709]" pageId="24" pageNumber="1417">
Original illustrations of thoracic uncini show a paleate morphology, with teeth, including main fang, all absent. However, this can be explained by frontal observation of an uncinus, similarly to what we noticed in the present study (compare
<figureCitation id="10F42A20FFC0FFD6FC1159FB90B0FA4D" box="[906,1021,1476,1501]" captionStart="Figure 12" captionStartId="25.[160,225,1071,1094]" captionTargetBox="[165,1150,144,1036]" captionTargetId="figure-196@25.[163,1153,142,1039]" captionTargetPageId="25" captionText="Figure 12. Myxicola glacialis (YPM IZ 106560). A. peristomium notochaeta; B. 3rd chaetiger thoracic notochaeta; C. 24th chaetiger abdominal neurochaeta; DF. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively; GI. 24th chaetiger abdominal uncini." figureDoi="http://doi.org/10.5281/zenodo.13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="24" pageNumber="1417">Figure 12F</figureCitation>
with fig. 14I from
<bibRefCitation id="EC5E4B54FFC0FFD6FF4059D99228FA6F" author="Bush KJ" box="[219,357,1510,1535]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush (1905))</bibRefCitation>
. Abdominal uncini are consistent with our findings; also, we found some variability with longer and shorter breast forms, as reported by
<bibRefCitation id="EC5E4B54FFC0FFD6FCD75A369088F9B2" author="Bush KJ" box="[844,965,1545,1570]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush (1905</bibRefCitation>
, fig. 14J1, J2), but no pattern of distribution between these forms along the tori was observed. As in
<taxonomicName id="4FCF4D26FFC0FFD6FBF25A1392D8F9F7" authority=", Bush (1905)" authorityName=", Bush" authorityYear="1905" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="24" pageNumber="1417" phylum="Annelida" rank="species" species="conjuncta">
<emphasis id="BABBEAB7FFC0FFD6FBF25A139244F9F7" italics="true" pageId="24" pageNumber="1417">M. conjuncta</emphasis>
,
<bibRefCitation id="EC5E4B54FFC0FFD6FE8F5A7192D8F9F7" author="Bush KJ" box="[276,405,1614,1639]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush (1905)</bibRefCitation>
</taxonomicName>
reported the presence of spear-shaped thoracic chaetae, not found in the current analysis. Interestingly, a marked serration on the hood of chaetae seems to be present in the drawings, similarly to our findings (
<bibRefCitation id="EC5E4B54FFC0FFD6FD5E5AAB9074F93D" author="Bush KJ" box="[709,825,1684,1709]" pageId="24" pageNumber="1417" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
, fig. 14F1G2).
</paragraph>
<caption id="DCB0662DFFC1FFD7FF3B58109030FB11" ID-DOI="http://doi.org/10.5281/zenodo.13758496" ID-Zenodo-Dep="13758496" httpUri="https://zenodo.org/record/13758496/files/figure.png" pageId="25" pageNumber="1418" startId="25.[160,225,1071,1094]" targetBox="[165,1150,144,1036]" targetPageId="25" targetType="figure">
<paragraph id="887036A5FFC1FFD7FF3B58109030FB11" blockId="25.[160,1156,1065,1184]" pageId="25" pageNumber="1418">
<emphasis id="BABBEAB7FFC1FFD7FF3B58109245FBD6" bold="true" box="[160,264,1071,1094]" pageId="25" pageNumber="1418">Figure 12.</emphasis>
<taxonomicName id="4FCF4D26FFC1FFD7FE8A581092F4FBD6" authorityName="Bush" authorityYear="1905" box="[273,441,1071,1094]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC1FFD7FE8A581092F4FBD6" box="[273,441,1071,1094]" italics="true" pageId="25" pageNumber="1418">Myxicola glacialis</emphasis>
</taxonomicName>
(YPM IZ 106560).
<emphasis id="BABBEAB7FFC1FFD7FDE8581091CFFBD6" bold="true" box="[627,642,1071,1094]" pageId="25" pageNumber="1418">A</emphasis>
. peristomium notochaeta;
<emphasis id="BABBEAB7FFC1FFD7FC0A581090D2FBD6" bold="true" box="[913,927,1071,1094]" pageId="25" pageNumber="1418">B</emphasis>
. 3rd chaetiger thoracic notochaeta;
<emphasis id="BABBEAB7FFC1FFD7FE8558739261FBF3" bold="true" box="[286,300,1100,1123]" pageId="25" pageNumber="1418">C</emphasis>
. 24th chaetiger abdominal neurochaeta;
<emphasis id="BABBEAB7FFC1FFD7FD57587391BBFBF3" bold="true" box="[716,758,1100,1123]" pageId="25" pageNumber="1418">DF</emphasis>
. 3rd chaetiger thoracic uncinus, lateral, dorsal and front views, respectively;
<emphasis id="BABBEAB7FFC1FFD7FD9158559160FB11" bold="true" box="[522,557,1130,1153]" pageId="25" pageNumber="1418">GI</emphasis>
. 24th chaetiger abdominal uncini.
</paragraph>
</caption>
<paragraph id="887036A5FFC1FFD7FF3B58B39200FB30" blockId="25.[160,1156,1065,1184]" box="[160,333,1164,1184]" pageId="25" pageNumber="1418">
Scale bars:
<quantity id="4F379B40FFC1FFD7FF6558B39204FB30" box="[254,329,1164,1184]" metricMagnitude="-5" metricUnit="m" metricValue="2.0" pageId="25" pageNumber="1418" unit="mm" value="0.02">0.02 mm</quantity>
.
</paragraph>
<paragraph id="887036A5FFC1FFD7FF5B58DC9001FA39" blockId="25.[160,1156,1251,1727]" pageId="25" pageNumber="1418">
Although World Register of Marine Species (2023) reports this taxon as synonymous with
<taxonomicName id="4FCF4D26FFC1FFD7FF45593991DDFA8F" authority="(Claparede 1870)" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[222,656,1286,1311]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FF45593992F0FA8F" box="[222,445,1286,1311]" italics="true" pageId="25" pageNumber="1418">Myxicola aesthetica</emphasis>
(
<bibRefCitation id="EC5E4B54FFC1FFD7FE55593991CAFA8F" author="Claparede E" box="[462,647,1286,1311]" pageId="25" pageNumber="1418" pagination="365 - 542" refId="ref13043" refString="Claparede E. 1870. Les Annelides Chetopodes du Golfe de Naples. Supplement Memoires de la Societe de physique et d'histoire naturelle de Geneve. 20: 365 - 542." type="journal article" year="1870">Claparède 1870</bibRefCitation>
)
</taxonomicName>
, such synonymy has never been formally proposed. In fact,
<bibRefCitation id="EC5E4B54FFC1FFD7FEED5916916AFAD2" author="Berkeley E" box="[374,551,1321,1346]" pageId="25" pageNumber="1418" pagination="65 - 77" refId="ref12802" refString="Berkeley E. 1930. Polychaetous annelids from the nanaimo district part 5. Ammocharidae to Myzostomidae: with an appendix on some pelagic forms from the straits of georgia and the west coast of Vancouver island. Contri Can Spec Publ Fish. 6: 65 - 77. doi: 10.1139 / f 31 - 005." type="journal article" year="1930">Berkeley (1930)</bibRefCitation>
only cited the possibility of synonymy between
<taxonomicName id="4FCF4D26FFC1FFD7FBF2591693BAFAF4" authorityName="Bush" authorityYear="1905" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC1FFD7FBF2591693BAFAF4" italics="true" pageId="25" pageNumber="1418">M. glacialis</emphasis>
</taxonomicName>
and
<taxonomicName id="4FCF4D26FFC1FFD7FEB6597492F6FAF4" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[301,443,1355,1380]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FEB6597492F6FAF4" box="[301,443,1355,1380]" italics="true" pageId="25" pageNumber="1418">M. aesthetica</emphasis>
</taxonomicName>
, referring to
<bibRefCitation id="EC5E4B54FFC1FFD7FDD2597491B0FAF4" author="McIntosh WC" box="[585,765,1355,1380]" pageId="25" pageNumber="1418" pagination="251 - 538" refId="ref13741" refString="McIntosh WC. 1923. A monograph of the British marine annelids. Polychaeta, Sabellidae to Serpulidae. With additions to the British marine Polychaeta during the publication of the monograph. R Soc Lond. 4: 251 - 538." type="journal article" year="1923">McIntosh (1923)</bibRefCitation>
, who, however, only pointed to the fact that
<bibRefCitation id="EC5E4B54FFC1FFD7FE98595192CBFA17" author="Bush KJ" box="[259,390,1390,1415]" pageId="25" pageNumber="1418" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush (1905)</bibRefCitation>
did not compare
<taxonomicName id="4FCF4D26FFC1FFD7FDD659519188FA17" authorityName="Bush" authorityYear="1905" box="[589,709,1390,1415]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC1FFD7FDD659519188FA17" box="[589,709,1390,1415]" italics="true" pageId="25" pageNumber="1418">M. glacialis</emphasis>
</taxonomicName>
with
<taxonomicName id="4FCF4D26FFC1FFD7FC98595190DFFA17" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[771,914,1390,1415]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FC98595190DFFA17" box="[771,914,1390,1415]" italics="true" pageId="25" pageNumber="1418">M. aesthetica</emphasis>
</taxonomicName>
, notwithstanding the similarities between members of these taxa (
<bibRefCitation id="EC5E4B54FFC1FFD7FD0C59AF9072FA39" author="McIntosh WC" box="[663,831,1424,1449]" pageId="25" pageNumber="1418" pagination="251 - 538" refId="ref13741" refString="McIntosh WC. 1923. A monograph of the British marine annelids. Polychaeta, Sabellidae to Serpulidae. With additions to the British marine Polychaeta during the publication of the monograph. R Soc Lond. 4: 251 - 538." type="journal article" year="1923">McIntosh 1923</bibRefCitation>
).
</paragraph>
<paragraph id="887036A5FFC1FFD7FF5B598C9289F92F" blockId="25.[160,1156,1251,1727]" pageId="25" pageNumber="1418">
Specimens of
<taxonomicName id="4FCF4D26FFC1FFD7FEC7598C92A6FA5C" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[348,491,1459,1484]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FEC7598C92A6FA5C" box="[348,491,1459,1484]" italics="true" pageId="25" pageNumber="1418">M. aesthetica</emphasis>
</taxonomicName>
and
<taxonomicName id="4FCF4D26FFC1FFD7FDB8598C91D6FA5C" authorityName="Bush" authorityYear="1905" box="[547,667,1459,1484]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC1FFD7FDB8598C91D6FA5C" box="[547,667,1459,1484]" italics="true" pageId="25" pageNumber="1418">M. glacialis</emphasis>
</taxonomicName>
have similar biometric features, such as the number of thoracic (3) and abdominal chaetigers (up to
<quantity id="4F379B40FFC1FFD7FC8B59E9900BFA7F" box="[784,838,1494,1519]" metricMagnitude="0" metricUnit="m" metricValue="1.27" pageId="25" pageNumber="1418" unit="in" value="50.0">50 in</quantity>
individuals of
<taxonomicName id="4FCF4D26FFC1FFD7FC7C59E9973BFA7F" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[999,1142,1494,1519]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FC7C59E9973BFA7F" box="[999,1142,1494,1519]" italics="true" pageId="25" pageNumber="1418">M. aesthetica</emphasis>
</taxonomicName>
), body length (up to
<quantity id="4F379B40FFC1FFD7FE1A59C7929FF981" box="[385,466,1528,1553]" metricMagnitude="-2" metricUnit="m" metricValue="4.0" pageId="25" pageNumber="1418" unit="mm" value="40.0">40 mm</quantity>
) and number of radioles (5 to 10 pairs). However, important differences can be noticed in the shape of thoracic and abdominal uncini (both showing only a single apical tooth in individuals of
<taxonomicName id="4FCF4D26FFC1FFD7FD3B5A019078F9C7" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[672,821,1598,1623]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FD3B5A019078F9C7" box="[672,821,1598,1623]" italics="true" pageId="25" pageNumber="1418">M. aesthetica</emphasis>
</taxonomicName>
), in the arrangement of the radiolar skeleton (2 skeletal cells in individuals of
<taxonomicName id="4FCF4D26FFC1FFD7FD435A5F9024F9E9" baseAuthorityName="Claparede" baseAuthorityYear="1870" box="[728,873,1632,1657]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="aesthetica">
<emphasis id="BABBEAB7FFC1FFD7FD435A5F9024F9E9" box="[728,873,1632,1657]" italics="true" pageId="25" pageNumber="1418">M. aesthetica</emphasis>
</taxonomicName>
), and in the presence of peristomial dark eyes and otoliths (not found in
<taxonomicName id="4FCF4D26FFC1FFD7FD5E5ABC9072F90C" authorityName="Bush" authorityYear="1905" box="[709,831,1667,1692]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="25" pageNumber="1418" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC1FFD7FD5E5ABC9072F90C" box="[709,831,1667,1692]" italics="true" pageId="25" pageNumber="1418">M. glacialis</emphasis>
</taxonomicName>
), that clearly separate members of these two species.
</paragraph>
</subSubSection>
<caption id="DCB0662DFFC2FFD4FF3B5E499706FD58" ID-DOI="http://doi.org/10.5281/zenodo.13758500" ID-Zenodo-Dep="13758500" httpUri="https://zenodo.org/record/13758500/files/figure.png" pageId="26" pageNumber="1419" startId="26.[160,225,630,653]" targetBox="[163,1153,142,598]" targetPageId="26" targetType="figure">
<paragraph id="887036A5FFC2FFD4FF3B5E499706FD58" blockId="26.[160,1155,630,712]" pageId="26" pageNumber="1419">
<emphasis id="BABBEAB7FFC2FFD4FF3B5E49924BFD1D" bold="true" box="[160,262,630,653]" pageId="26" pageNumber="1419">Figure 13.</emphasis>
Original photos of
<taxonomicName id="4FCF4D26FFC2FFD4FE5F5E499155FD1D" box="[452,536,630,653]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="26" pageNumber="1419" phylum="Annelida" rank="genus">
<emphasis id="BABBEAB7FFC2FFD4FE5F5E499155FD1D" box="[452,536,630,653]" italics="true" pageId="26" pageNumber="1419">Myxicola</emphasis>
</taxonomicName>
specimens analysed by
<bibRefCitation id="EC5E4B54FFC2FFD4FC9D5E499036FD1D" author="Bush KJ" box="[774,891,630,653]" pageId="26" pageNumber="1419" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush (1905)</bibRefCitation>
:
<emphasis id="BABBEAB7FFC2FFD4FC1E5E4990EFFD1D" bold="true" box="[901,930,630,653]" pageId="26" pageNumber="1419">A1</emphasis>
,
<emphasis id="BABBEAB7FFC2FFD4FC365E499084FD1D" bold="true" box="[941,969,630,653]" pageId="26" pageNumber="1419">A2</emphasis>
,
<taxonomicName id="4FCF4D26FFC2FFD4FC4F5E499772FD1D" authorityName="Bush" authorityYear="1905" box="[980,1087,630,653]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="26" pageNumber="1419" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC2FFD4FC4F5E499772FD1D" box="[980,1087,630,653]" italics="true" pageId="26" pageNumber="1419">M. glacialis</emphasis>
</taxonomicName>
(short form);
<emphasis id="BABBEAB7FFC2FFD4FF7D5EAC93B9FD3A" bold="true" box="[230,244,659,682]" pageId="26" pageNumber="1419">B</emphasis>
,
<taxonomicName id="4FCF4D26FFC2FFD4FE9B5EAC9227FD3A" authorityName="Bush" authorityYear="1905" box="[256,362,659,682]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="26" pageNumber="1419" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC2FFD4FE9B5EAC9227FD3A" box="[256,362,659,682]" italics="true" pageId="26" pageNumber="1419">M. glacialis</emphasis>
</taxonomicName>
(long form);
<emphasis id="BABBEAB7FFC2FFD4FE6F5EAC914FFD3A" bold="true" box="[500,514,659,682]" pageId="26" pageNumber="1419">C</emphasis>
,
<taxonomicName id="4FCF4D26FFC2FFD4FD965EAC91C4FD3A" authorityName=", Bush" authorityYear="1905" box="[525,649,659,682]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="26" pageNumber="1419" phylum="Annelida" rank="species" species="conjuncta">
<emphasis id="BABBEAB7FFC2FFD4FD965EAC91C4FD3A" box="[525,649,659,682]" italics="true" pageId="26" pageNumber="1419">M. conjuncta</emphasis>
</taxonomicName>
;
<emphasis id="BABBEAB7FFC2FFD4FD0F5EAC91E9FD3A" bold="true" box="[660,676,659,682]" pageId="26" pageNumber="1419">D</emphasis>
. radiole of
<taxonomicName id="4FCF4D26FFC2FFD4FC895EAC90C3FD3A" authorityName=", Bush" authorityYear="1905" box="[786,910,659,682]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="26" pageNumber="1419" phylum="Annelida" rank="species" species="conjuncta">
<emphasis id="BABBEAB7FFC2FFD4FC895EAC90C3FD3A" box="[786,910,659,682]" italics="true" pageId="26" pageNumber="1419">M. conjuncta</emphasis>
</taxonomicName>
;
<emphasis id="BABBEAB7FFC2FFD4FC025EAC90E8FD3A" bold="true" box="[921,933,659,682]" pageId="26" pageNumber="1419">E</emphasis>
. radiole of
<taxonomicName id="4FCF4D26FFC2FFD4FB8F5EAC9733FD3A" authorityName="Bush" authorityYear="1905" box="[1044,1150,659,682]" class="Polychaeta" family="Sabellidae" genus="Myxicola" kingdom="Animalia" order="Sabellida" pageId="26" pageNumber="1419" phylum="Annelida" rank="species" species="glacialis">
<emphasis id="BABBEAB7FFC2FFD4FB8F5EAC9733FD3A" box="[1044,1150,659,682]" italics="true" pageId="26" pageNumber="1419">M. glacialis</emphasis>
</taxonomicName>
. A1 and C, specimens YPM IZ 106540 and YPM IZ 002773, respectively. Photos from
<bibRefCitation id="EC5E4B54FFC2FFD4FC445E8E970BFD58" author="Bush KJ" box="[991,1094,689,712]" pageId="26" pageNumber="1419" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
.
</paragraph>
</caption>
<subSubSection id="C0D5652EFFC2FFD4FF3B5F2E9196FC02" pageId="26" pageNumber="1419" type="distribution">
<paragraph id="887036A5FFC2FFD4FF3B5F2E9288FCBB" blockId="26.[160,1156,785,914]" box="[160,453,785,811]" pageId="26" pageNumber="1419">
<emphasis id="BABBEAB7FFC2FFD4FF3B5F2E9288FCBB" bold="true" box="[160,453,785,811]" italics="true" pageId="26" pageNumber="1419">Distribution and ecology</emphasis>
</paragraph>
<paragraph id="887036A5FFC2FFD4FF3B5F0B9196FC02" blockId="26.[160,1156,785,914]" pageId="26" pageNumber="1419">
Dutch Harbour, Unalaska Island. The only information concerning the ecology of these animals reported in the original description (
<bibRefCitation id="EC5E4B54FFC2FFD4FD175F68904CFCE0" author="Bush KJ" box="[652,769,855,880]" pageId="26" pageNumber="1419" pagination="169 - 346" refId="ref12888" refString="Bush KJ. 1905. Tubicolous annelids of the tribes sabellides and serpulides from the Pacific Ocean. New York: Doubleday; p. 169 - 346." type="book chapter" year="1905">Bush 1905</bibRefCitation>
: p. 219) is […] embedded in much mucus, under and between stones on shelly sand.
</paragraph>
</subSubSection>
</treatment>
</document>