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<document id="23E0DFEAC6C76F24C2BCB7416B803810" ID-CLB-Dataset="3500" ID-DOI="10.11646/zootaxa.5068.1.1" ID-GBIF-Dataset="726fdd32-9199-4ca9-9dcd-2892bc30b2e3" ID-ISSN="1175-5326" ID-Zenodo-Dep="5702007" ID-ZooBank="F0D7412B-5968-4459-9BA4-F1A314BA8EC7" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1636961366237" checkinUser="plazi" docAuthor="Cruz-Gómez, Christopher" docDate="2021" docId="044C38047172EF28D7D3FE6021949282" docLanguage="en" docName="zootaxa.5068.1.1.pdf" docOrigin="Zootaxa 5068 (1)" docStyle="DocumentStyle:647186512141C8FC8976D5BCC54AEB7D.9:Zootaxa.2013-.journal_article" docStyleId="647186512141C8FC8976D5BCC54AEB7D" docStyleName="Zootaxa.2013-.journal_article" docStyleVersion="9" docTitle="Arichlidon mucropaleum Cruz-Gómez 2021, n. sp." docType="treatment" docVersion="7" lastPageNumber="21" masterDocId="F875407C7160EF3CD744FFAA2036932F" masterDocTitle="A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific" masterLastPageNumber="59" masterPageNumber="1" pageNumber="19" updateTime="1699468561083" updateUser="ExternalLinkService" zenodo-license-document="CLOSED">
<mods:mods id="175B7F57862501EA0B743DB69DC2F1FA" xmlns:mods="http://www.loc.gov/mods/v3">
<mods:titleInfo id="66E7EE8F2A84EE8EDE9ECEBA9F494924">
<mods:title id="F25409D2FA9D4FFCAE11DA36423A4F0D">A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific</mods:title>
</mods:titleInfo>
<mods:name id="42A5B6A4E226D34F44150E0BEED73336" type="personal">
<mods:role id="ECE26709009B4F82E2E4EAD6CA0F7F0F">
<mods:roleTerm id="E4C17424B409AAB8600AFF22FB3CBA8D">Author</mods:roleTerm>
</mods:role>
<mods:namePart id="FDC8B996D732C730A0512DFBAB6FA812">Cruz-Gómez, Christopher</mods:namePart>
<mods:nameIdentifier id="6793EC3CC296C4EA0B044B267508CD5A" type="ORCID">0000-0002-2618-9230</mods:nameIdentifier>
<mods:affiliation id="084B20174030A083C5CBA46C5E882E86">Laboratorio de Sistemática de Invertebrados Marinos (LABSIM), Universidad del Mar (UMAR), campus Puerto Ángel, Oaxaca, México Departamento de Sistemática y Ecología Acuática, El Colegio de la Frontera Sur (ECOSUR), Unidad Chetumal, Quintana Roo, México christopher. cruz-gomez @ hotmail. com; https: // orcid. org / 0000 - 0002 - 2618 - 9230</mods:affiliation>
<mods:nameIdentifier id="3692D28B0A0A1AE3CC62C4B827CAF78B" type="email">christopher.cruz-gomez@hotmail.com</mods:nameIdentifier>
</mods:name>
<mods:typeOfResource id="7A56973B9BE0E0A841E5DB01A5244F88">text</mods:typeOfResource>
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<mods:title id="0DA6DAB51932048ACFC9133F94E3B200">Zootaxa</mods:title>
</mods:titleInfo>
<mods:part id="409B74DFDC00894CD6041304ABFDF4D6">
<mods:date id="7B1F84BA8C20AC817089A3E67DE8DE3D">2021</mods:date>
<mods:detail id="4CF7A1D9983599408CE0B72E7CB4BB6B" type="pubDate">
<mods:number id="46E5BA9242D0E29BD5D4117FFED64DE5">2021-11-15</mods:number>
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<mods:number id="E2EE72997B6EC98D6B2E871B1191174E">5068</mods:number>
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<mods:number id="7056A16F332AD2572524694017C372D1">1</mods:number>
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<mods:start id="6E4CBDFB08D63BFEBAC71FB23CEF3715">1</mods:start>
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<mods:classification id="379D994E48CC3D42740C1C48D2122A82">journal article</mods:classification>
<mods:identifier id="4F84FF69896DD264B40175D984843B69" type="CLB-Dataset">3500</mods:identifier>
<mods:identifier id="3FEC274FFB173D408E0E8BDC0BC4DEEB" type="DOI">10.11646/zootaxa.5068.1.1</mods:identifier>
<mods:identifier id="B43AD49356B7C424FAB7722A344A0B61" type="GBIF-Dataset">726fdd32-9199-4ca9-9dcd-2892bc30b2e3</mods:identifier>
<mods:identifier id="418215430CDEC00D76365E4FCBDD0C6C" type="ISSN">1175-5326</mods:identifier>
<mods:identifier id="6BF906B721F890080090167E9E8D0904" type="Zenodo-Dep">5702007</mods:identifier>
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<treatment id="044C38047172EF28D7D3FE6021949282" ID-DOI="http://doi.org/10.5281/zenodo.5706137" ID-GBIF-Taxon="190304380" ID-Zenodo-Dep="5706137" LSID="urn:lsid:plazi:treatment:044C38047172EF28D7D3FE6021949282" httpUri="http://treatment.plazi.org/id/044C38047172EF28D7D3FE6021949282" lastPageId="20" lastPageNumber="21" pageId="18" pageNumber="19">
<subSubSection id="C4FFDA997172EF2ED7D3FE60222592CA" box="[151,531,458,485]" pageId="18" pageNumber="19" type="nomenclature">
<paragraph id="8C5A89127172EF2ED7D3FE60222592CA" blockId="18.[151,945,458,551]" box="[151,531,458,485]" pageId="18" pageNumber="19">
<heading id="D7123E7E7172EF2ED7D3FE60222592CA" bold="true" box="[151,531,458,485]" fontSize="11" level="1" pageId="18" pageNumber="19" reason="1">
<emphasis id="BE9155007172EF2ED7D3FE60222592CA" bold="true" box="[151,531,458,485]" pageId="18" pageNumber="19">
<taxonomicName id="4BE5F2917172EF2ED7D3FE6021FF92CA" ID-CoL="8SM3G" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[151,457,458,485]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED7D3FE6021FF92CA" bold="true" box="[151,457,458,485]" italics="true" pageId="18" pageNumber="19">Arichlidon mucropaleum</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A5A2E87B7172EF2ED694FE61222592CA" box="[464,531,459,485]" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997172EF2ED7D3FE4523879108" pageId="18" pageNumber="19" type="description">
<paragraph id="8C5A89127172EF2ED7D3FE4521309126" blockId="18.[151,945,458,551]" box="[151,262,495,521]" pageId="18" pageNumber="19">
<figureCitation id="14DE95977172EF2ED7D3FE4520E89126" box="[151,222,495,521]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Figs 9</figureCitation>
,
<figureCitation id="14DE95977172EF2ED7AEFE4521309126" box="[234,262,495,521]" captionStart="FIGURE 12" captionStartId="25.[151,250,1171,1195]" captionTargetBox="[171,1417,186,1141]" captionTargetId="figure-15@25.[165,1422,181,1147]" captionTargetPageId="25" captionText="FIGURE 12. Previous and new records of chrysopetalids in the Tropical Eastern Pacific. Empty symbols indicate historic records." figureDoi="http://doi.org/10.5281/zenodo.5702057" httpUri="https://zenodo.org/record/5702057/files/figure.png" pageId="18" pageNumber="19">12</figureCitation>
</paragraph>
<paragraph id="8C5A89127172EF2ED7D3FDA623879108" blockId="18.[151,945,458,551]" box="[151,945,524,551]" pageId="18" pageNumber="19">
<uri id="F87485107172EF2ED7D3FDA623879108" box="[151,945,524,551]" pageId="18" pageNumber="19">
urn:lsid:zoobank.org:act:
<uuid id="F843B3C77172EF2ED6E8FDA623879108" box="[428,945,524,551]" pageId="18" pageNumber="19">422895C5-5465-47C9-B582-1C539A87E635</uuid>
</uri>
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997172EF2ED7D3FDE12490914C" box="[151,1190,587,611]" pageId="18" pageNumber="19" type="reference_group">
<paragraph id="8C5A89127172EF2ED7D3FDE12490914C" blockId="18.[151,1190,587,611]" box="[151,1190,587,611]" pageId="18" pageNumber="19">
<treatmentCitationGroup id="ACF5AE3C7172EF2ED7D3FDE12490914C" box="[151,1190,587,611]" pageId="18" pageNumber="19">
<taxonomicName id="4BE5F2917172EF2ED7D3FDE12111914C" box="[151,295,587,611]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="undetermined">
<emphasis id="BE9155007172EF2ED7D3FDE12135914C" box="[151,259,587,611]" italics="true" pageId="18" pageNumber="19">Arichlidon</emphasis>
sp.
</taxonomicName>
—
<treatmentCitation id="0D44AF037172EF2ED603FDE12247914C" author="Cruz-Gomez, C. &amp; Salazar-Vallejo, S. &amp; Mora-Vallin, Z. G." box="[327,625,587,611]" page="179" pageId="18" pageNumber="19" year="2021">
<bibRefCitation id="E874F4E37172EF2ED603FDE12247914C" author="Cruz-Gomez, C. &amp; Salazar-Vallejo, S. &amp; Mora-Vallin, Z. G." box="[327,625,587,611]" pageId="18" pageNumber="19" pagination="167 - 186" refId="ref35599" refString="Cruz-Gomez, C., Salazar-Vallejo, S. &amp; Mora-Vallin, Z. G. (2021) Chrysopetalidae Ehlers, 1864. In: de Leon-Gonzalez J. A., Bastida-Zavala J. R., Carrera-Parra L. F., Garcia-Garza M. E., Salazar-Vallejo S. I., Solis-Weiss V. &amp; Tovar-Hernandez M. A. (Eds.), Anelidos Marinos de Mexico y America Tropical. Universidad Autonoma de Nuevo Leon, Nuevo Leon, pp. 167 - 186." type="book chapter" year="2021">
Cruz-Gómez
<emphasis id="BE9155007172EF2ED694FDE62235914C" box="[464,515,587,611]" italics="true" pageId="18" pageNumber="19">et al.</emphasis>
2021: 179
</bibRefCitation>
</treatmentCitation>
,
<figureCitation id="14DE95977172EF2ED53FFDE122F6914C" box="[635,704,587,611]" captionStart="FIGURE 4" captionStartId="9.[151,250,1908,1932]" captionTargetBox="[186,1401,181,1882]" captionTargetId="figure-15@9.[186,1401,181,1884]" captionTargetPageId="9" captionText="FIGURE 4. Paleanotus macrophthalmum (Hartmann-Schröder, 1959), non-type specimen (UMAR-Poly-OH-020). A) Complete fragmented body. B) Parapodium from segment 10. C) Lateral paleae. D) Subunit 1. E) Main palea. F–G) Median paleae. H) Unit 1. I) Unit 2. J) Unit 3. K) Unit 4. L) Drawing of pygidium, ventral view. Scales: 10 µm (HIJK), 20 µm (CDEFGL), 100 µm (B), 500 µm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702029" httpUri="https://zenodo.org/record/5702029/files/figure.png" pageId="18" pageNumber="19">Fig. 4J</figureCitation>
(key of chrysopetalids from Tropical America).
</treatmentCitationGroup>
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997172EF2ED7D3FD26255391C2" pageId="18" pageNumber="19" type="materials_examined">
<paragraph id="8C5A89127172EF2ED7D3FD2623BD9189" blockId="18.[151,1437,652,2028]" box="[151,907,652,680]" pageId="18" pageNumber="19">
<materialsCitation id="3C8D834F7172EF2ED7D3FD2623B19189" ID-GBIF-Occurrence="3406812421" box="[151,903,652,680]" country="Mexico" location="Angel de la Guarda Island" pageId="18" pageNumber="19" specimenCount="1" stateProvince="Baja California" typeStatus="holotype">
<emphasis id="BE9155007172EF2ED7D3FD26210F9189" bold="true" box="[151,313,652,678]" pageId="18" pageNumber="19">
<typeStatus id="535E37B07172EF2ED7D3FD2620E49189" box="[151,210,652,678]" pageId="18" pageNumber="19">Type</typeStatus>
locality:
</emphasis>
<location id="893ADFC97172EF2ED604FD27225F9189" LSID="urn:lsid:plazi:treatment:044C38047172EF28D7D3FE6021949282:893ADFC97172EF2ED604FD27225F9189" box="[320,617,652,680]" country="Mexico" name="Angel de la Guarda Island" pageId="18" pageNumber="19" stateProvince="Baja California">Ángel de la Guarda Island</location>
,
<collectingRegion id="4E2147F07172EF2ED530FD2623149189" box="[628,802,652,678]" country="Mexico" name="Baja California" pageId="18" pageNumber="19">Baja California</collectingRegion>
,
<collectingCountry id="F4F2C9827172EF2ED46AFD2623B19189" box="[814,903,652,678]" name="Mexico" pageId="18" pageNumber="19">Mexico</collectingCountry>
</materialsCitation>
.
</paragraph>
<paragraph id="8C5A89127172EF2ED783FD1A255391C2" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
<emphasis id="BE9155007172EF2ED783FD1A214491E6" bold="true" box="[199,370,687,714]" pageId="18" pageNumber="19">Type material.</emphasis>
<materialsCitation id="3C8D834F7172EF2ED63CFD1A22FC91C2" ID-GBIF-Occurrence="3406812425" collectingDate="1987-08-15" collectionCode="ECOSUR" country="Mexico" location="Angel de la Guarda Island" municipality="Gulf of California" pageId="18" pageNumber="19" specimenCode="ECOSUR-260" specimenCount="1" stateProvince="Baja California" typeStatus="holotype">
<emphasis id="BE9155007172EF2ED63CFD1A21DA91E5" bold="true" box="[376,492,688,714]" pageId="18" pageNumber="19">
<typeStatus id="535E37B07172EF2ED63CFD1A21D191E5" box="[376,487,688,714]" pageId="18" pageNumber="19" type="holotype">Holotype</typeStatus>
:
</emphasis>
<specimenCode id="DC4321697172EF2ED6B6FD0522A591E6" box="[498,659,687,713]" collectionCode="ECOSUR-" pageId="18" pageNumber="19">ECOSUR-260</specimenCode>
, on a separated vial,
<location id="893ADFC97172EF2ED43CFD1B24AF91E6" LSID="urn:lsid:plazi:treatment:044C38047172EF28D7D3FE6021949282:893ADFC97172EF2ED43CFD1B24AF91E6" box="[888,1177,687,716]" country="Mexico" municipality="Gulf of California" name="Angel de la Guarda Island" pageId="18" pageNumber="19" stateProvince="Baja California">Ángel de la Guarda Island</location>
,
<collectingRegion id="4E2147F07172EF2ED3E0FD05257991E6" box="[1188,1359,687,713]" country="Mexico" name="Baja California" pageId="18" pageNumber="19">Baja California</collectingRegion>
,
<collectingCountry id="F4F2C9827172EF2ED21DFD05208591C2" name="Mexico" pageId="18" pageNumber="19">Mexico</collectingCountry>
,
<collectingMunicipality id="6C3E13687172EF2ED7FAFD7921B191C2" box="[190,391,723,749]" pageId="18" pageNumber="19">Gulf of California</collectingMunicipality>
,
<date id="F85BAFD27172EF2ED6D4FD79227191C2" box="[400,583,723,750]" pageId="18" pageNumber="19" value="1987-08-15">
<collectingDate id="E81F563A7172EF2ED6D4FD79227191C2" box="[400,583,723,750]" pageId="18" pageNumber="19" value="1987-08-15">August 15, 1987</collectingDate>
</date>
, coll. MEH
</materialsCitation>
.
<materialsCitation id="3C8D834F7172EF2ED590FD79255791C2" ID-GBIF-Occurrence="3406812308" box="[724,1377,723,749]" collectingDate="1987-08-15" collectionCode="ECOSUR-" country="Mexico" location="Angel de la Guarda Island" municipality="Gulf of California" pageId="18" pageNumber="19" specimenCode="ECOSUR-260" specimenCount="10" stateProvince="Baja California" typeStatus="paratype">
<emphasis id="BE9155007172EF2ED590FD79236491C2" bold="true" box="[724,850,723,749]" pageId="18" pageNumber="19">
<typeStatus id="535E37B07172EF2ED590FD79237B91C2" box="[724,845,723,749]" pageId="18" pageNumber="19" type="paratype">Paratypes</typeStatus>
:
</emphasis>
<specimenCode id="DC4321697172EF2ED41DFD7923CC91C2" box="[857,1018,723,749]" collectionCode="ECOSUR-" pageId="18" pageNumber="19">ECOSUR-260</specimenCode>
,
<specimenCount id="9AE3429B7172EF2ED341FD79245791C2" box="[1029,1121,723,749]" pageId="18" pageNumber="19" type="generic">10 spec.</specimenCount>
, same data as holotype
</materialsCitation>
.
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997172EF2ED783FD5C23E896F9" pageId="18" pageNumber="19" type="description">
<paragraph id="8C5A89127172EF2ED783FD5C20C19078" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
<emphasis id="BE9155007172EF2ED783FD5C216F903F" bold="true" box="[199,345,758,784]" pageId="18" pageNumber="19">Description.</emphasis>
Based on the
<typeStatus id="535E37B07172EF2ED544FD5C2250903F" box="[512,614,758,784]" pageId="18" pageNumber="19" type="holotype">holotype</typeStatus>
: complete with 37 segments. TL= 4.2 mm, TW= 1.2 mm. Body rectangular, tapered posteriorly (
<figureCitation id="14DE95977172EF2ED685FCB0222D901B" box="[449,539,794,820]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9A</figureCitation>
). Body pale yellow to orange. Paleae fans bright golden, completely imbricated dorsally.
</paragraph>
<paragraph id="8C5A89127172EF2ED783FCCB21049726" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
Prostomium retracted between the first two segments. Lateral antennae short, inserted on antero-ventral prostomial margin, median antenna slightly shorter than lateral ones. Eyes red-violet, fused, hard to see in specimens with retracted prostomium. Nuchal organ reduced, partially covering prostomium (
<figureCitation id="14DE95977172EF2ED374FC0224BE90ED" box="[1072,1160,936,962]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9B</figureCitation>
). Palps long, cylindrical, partially visible in dorsal view. Mouth fold wide, placed between segments 3 and 4. Pharynx eversible, not exposed, stylet slender.
</paragraph>
<paragraph id="8C5A89127172EF2ED783FBB8244B960B" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
Parapodium from segment 22, notochaetae in three main groups (
<figureCitation id="14DE95977172EF2ED4E1FBB823C99703" box="[933,1023,1042,1068]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9D</figureCitation>
). Notochaetae: lateral group inserted below notaciculum, two kinds of paleae: first kind, lateral-most paleae, 1–2 paleae, slender, straight and symmetrical, with 6–8 internal ribs (
<figureCitation id="14DE95977172EF2ED688FBF32213975C" box="[460,549,1113,1139]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9E</figureCitation>
); second kind, mid-most paleae, 3–4 paleae, broader, longer, curved and symmetrical, with 14 internal ribs and 1–3 raised ribs (
<figureCitation id="14DE95977172EF2ED597FBD6231F97B8" box="[723,809,1148,1175]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9E</figureCitation>
, arrow). Main group, 15 paleae, broad and symmetrical with 16–17 internal finely denticulated ribs (
<figureCitation id="14DE95977172EF2ED5CBFB0A22D29795" box="[655,740,1184,1210]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9F</figureCitation>
). Subunit 1, 1 palea, broad and asymmetrical with 16 internal ribs (
<figureCitation id="14DE95977172EF2ED78BFB69211F97F1" box="[207,297,1219,1246]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9G</figureCitation>
). Median group, 3 paleae, short and curved; the mid-most, protruding above the main group level, with serrated margins, 12 internal ribs and 1 raised rib (
<figureCitation id="14DE95977172EF2ED596FB4D231A962E" box="[722,812,1255,1281]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9H</figureCitation>
). The next proximal smaller with 10 internal ribs and 1 raised rib, and the proximal-most, smallest with 11 internal ribs and 1 raised rib (
<figureCitation id="14DE95977172EF2ED365FAA02446960B" box="[1057,1136,1290,1316]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9I</figureCitation>
).
</paragraph>
<paragraph id="8C5A89127172EF2ED783FA8423E896F9" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
Neuropodium conical, smaller than notopodium. Neurochaetae: unit 1, 2–4 superior spinigers, blades straight and long, 12 times longer than wide (
<figureCitation id="14DE95977172EF2ED509FAFB22969644" box="[589,672,1361,1387]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9J</figureCitation>
). Unit 2, 3–5 falcigers, blades straight and medium-sized, 4 times longer than wide (
<figureCitation id="14DE95977172EF2ED627FADF218B96A0" box="[355,445,1397,1423]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9K</figureCitation>
). Unit 3, 4–6 falcigers, blades straight and medium-sized or short, 3–4 times longer than wide (
<figureCitation id="14DE95977172EF2ED798FA32216C969D" box="[220,346,1432,1458]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9L–M</figureCitation>
). Unit 4, 2–3 falcigers, blades curved and short, 3–5 times longer than wide (
<figureCitation id="14DE95977172EF2ED3E2FA322528969D" box="[1190,1310,1432,1458]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9N–P</figureCitation>
). Pygidium rounded with a ventral cone and two anal cirri (
<figureCitation id="14DE95977172EF2ED5EFFA16233596F9" box="[683,771,1468,1494]" captionStart="FIGURE 9" captionStartId="19.[151,250,1889,1913]" captionTargetBox="[206,1381,181,1858]" captionTargetId="figure-15@19.[206,1382,181,1865]" captionTargetPageId="19" captionText="FIGURE 9. Arichlidon mucropaleum n. sp., holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A)." figureDoi="http://doi.org/10.5281/zenodo.5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="18" pageNumber="19">Fig. 9C</figureCitation>
). Oocytes not seen.
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997172EF2ED783FA75256996D6" box="[199,1375,1503,1532]" pageId="18" pageNumber="19" type="distribution">
<paragraph id="8C5A89127172EF2ED783FA75256996D6" blockId="18.[151,1437,652,2028]" box="[199,1375,1503,1532]" pageId="18" pageNumber="19">
<emphasis id="BE9155007172EF2ED783FA75215796D6" bold="true" box="[199,353,1503,1529]" pageId="18" pageNumber="19">Distribution.</emphasis>
Only known from Ángel de la Guarda Island,
<collectingRegion id="4E2147F07172EF2ED42FFA75242F96D6" box="[875,1049,1503,1529]" country="Mexico" name="Baja California" pageId="18" pageNumber="19">Baja California</collectingRegion>
, Gulf of
<collectingRegion id="4E2147F07172EF2ED33AFA7524C696D6" box="[1150,1264,1503,1529]" country="United States of America" name="California" pageId="18" pageNumber="19">California</collectingRegion>
(
<figureCitation id="14DE95977172EF2ED3BAFA75256496D6" box="[1278,1362,1503,1529]" captionStart="FIGURE 12" captionStartId="25.[151,250,1171,1195]" captionTargetBox="[171,1417,186,1141]" captionTargetId="figure-15@25.[165,1422,181,1147]" captionTargetPageId="25" captionText="FIGURE 12. Previous and new records of chrysopetalids in the Tropical Eastern Pacific. Empty symbols indicate historic records." figureDoi="http://doi.org/10.5281/zenodo.5702057" httpUri="https://zenodo.org/record/5702057/files/figure.png" pageId="18" pageNumber="19">Fig. 12</figureCitation>
).
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997172EF28D783F9A922C99232" lastPageId="20" lastPageNumber="21" pageId="18" pageNumber="19" type="discussion">
<paragraph id="8C5A89127172EF2ED783F9A922629439" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
<emphasis id="BE9155007172EF2ED783F9A9210D9532" bold="true" box="[199,315,1539,1565]" pageId="18" pageNumber="19">Remarks.</emphasis>
This new species shares morphological features with other two species of the genus,
<taxonomicName id="4BE5F2917172EF2ED3AFF9A921C5956F" authority="Watson Russell, 1998" authorityName="Watson Russell" authorityYear="1998" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="hanneloreae">
<emphasis id="BE9155007172EF2ED3AFF9A920CE956F" italics="true" pageId="18" pageNumber="19">Arichlidon hanneloreae</emphasis>
<bibRefCitation id="E874F4E37172EF2ED7BBF98D21C5956F" author="Watson Russell, C." box="[255,499,1574,1601]" pageId="18" pageNumber="19" pagination="159 - 176" refId="ref38907" refString="Watson Russell, C. (1998) Description of Arichlidon new genus and two new species from Australia; Bhawania reyssi redescribed and assigned to Arichlidon (Chrysopetalidae: Polychaeta). The Beagle, Records of the Northern Territory Museum of Arts and Sciences, 14, 159 - 176." type="journal article" year="1998">Watson Russell, 1998</bibRefCitation>
</taxonomicName>
and
<taxonomicName id="4BE5F2917172EF2ED56EF98C23FB956F" authority="Watson Russell, 1998" authorityName="Watson Russell" authorityYear="1998" box="[554,973,1574,1601]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="acropetalon">
<emphasis id="BE9155007172EF2ED56EF98C22F9956F" box="[554,719,1574,1600]" italics="true" pageId="18" pageNumber="19">A. acropetalon</emphasis>
<bibRefCitation id="E874F4E37172EF2ED592F98D23FB956F" author="Watson Russell, C." box="[726,973,1574,1601]" pageId="18" pageNumber="19" pagination="159 - 176" refId="ref38907" refString="Watson Russell, C. (1998) Description of Arichlidon new genus and two new species from Australia; Bhawania reyssi redescribed and assigned to Arichlidon (Chrysopetalidae: Polychaeta). The Beagle, Records of the Northern Territory Museum of Arts and Sciences, 14, 159 - 176." type="journal article" year="1998">Watson Russell, 1998</bibRefCitation>
</taxonomicName>
, both described from northeast
<collectingCountry id="F4F2C9827172EF2ED26BF98C25AF956F" box="[1327,1433,1574,1600]" name="Australia" pageId="18" pageNumber="19">Australia</collectingCountry>
.
<taxonomicName id="4BE5F2917172EF2ED7D3F9E32186954C" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[151,432,1609,1635]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED7D3F9E32186954C" box="[151,432,1609,1635]" italics="true" pageId="18" pageNumber="19">Arichlidon mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007172EF2ED6F3F9E021C1954B" bold="true" box="[439,503,1610,1636]" pageId="18" pageNumber="19">
<taxonomicNameLabel id="A5A2E87B7172EF2ED6F3F9E021C1954B" box="[439,503,1610,1636]" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
resembles
<taxonomicName id="4BE5F2917172EF2ED533F9E02314954C" authorityName="Watson Russell" authorityYear="1998" box="[631,802,1609,1636]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="hanneloreae">
<emphasis id="BE9155007172EF2ED533F9E02314954C" box="[631,802,1609,1636]" italics="true" pageId="18" pageNumber="19">A. hanneloreae</emphasis>
</taxonomicName>
in the shape of the paleae shoulders of the main paleae; however,
<taxonomicName id="4BE5F2917172EF2ED641F9C7218B95A8" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[261,445,1645,1671]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED641F9C7218B95A8" box="[261,445,1645,1671]" italics="true" pageId="18" pageNumber="19">A. mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007172EF2ED681F9C7223295A8" bold="true" box="[453,516,1645,1671]" pageId="18" pageNumber="19">
<taxonomicNameLabel id="A5A2E87B7172EF2ED681F9C7223295A8" box="[453,516,1645,1671]" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
has a larger apical projection in the paleal apex, while
<taxonomicName id="4BE5F2917172EF2ED336F9C7252A95A8" authorityName="Watson Russell" authorityYear="1998" box="[1138,1308,1645,1671]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="hanneloreae">
<emphasis id="BE9155007172EF2ED336F9C7252A95A8" box="[1138,1308,1645,1671]" italics="true" pageId="18" pageNumber="19">A. hanneloreae</emphasis>
</taxonomicName>
has a short apical projection in the paleae apex (
<bibRefCitation id="E874F4E37172EF2ED56BF93B23619584" author="Watson Russell, C." box="[559,855,1680,1707]" pageId="18" pageNumber="19" pagination="159 - 176" refId="ref38907" refString="Watson Russell, C. (1998) Description of Arichlidon new genus and two new species from Australia; Bhawania reyssi redescribed and assigned to Arichlidon (Chrysopetalidae: Polychaeta). The Beagle, Records of the Northern Territory Museum of Arts and Sciences, 14, 159 - 176." type="journal article" year="1998">Watson Russell 1998: 172</bibRefCitation>
,
<figureCitation id="14DE95977172EF2ED427F93A23E89584" box="[867,990,1680,1707]" captionStart="FIGURE 6" captionStartId="14.[151,250,1943,1967]" captionTargetBox="[155,1389,181,1916]" captionTargetId="figure-26@14.[155,1432,181,1919]" captionTargetPageId="14" captionText="FIGURE 6. Paleanotus sp., non-type specimen (UMAR-Poly-017). A) Fragments. B) Parapodium from middle segment; B) Lateral paleae; C) Main palea; D–F) Median paleae; G–H) Unit 1; I) Unit 2; J) Unit 3; K) Unit 4; L) Pygidium, ventral view. Scales. Scales: 10 µm (HIJK), 20 µm (CDEFG), 100 µm (AB)." figureDoi="http://doi.org/10.5281/zenodo.5702040" httpUri="https://zenodo.org/record/5702040/files/figure.png" pageId="18" pageNumber="19">Fig. 6A–D</figureCitation>
). On the other hand,
<taxonomicName id="4BE5F2917172EF2ED383F93B25499585" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[1223,1407,1680,1707]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED383F93B25499585" box="[1223,1407,1680,1707]" italics="true" pageId="18" pageNumber="19">A. mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007172EF2ED2C2F93B208E95E1" bold="true" pageId="18" pageNumber="19">
<taxonomicNameLabel id="A5A2E87B7172EF2ED2C2F93B208E95E1" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
shares with
<taxonomicName id="4BE5F2917172EF2ED60DF91E21D995E1" authorityName="Watson Russell" authorityYear="1998" box="[329,495,1716,1742]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="acropetalon">
<emphasis id="BE9155007172EF2ED60DF91E21D995E1" box="[329,495,1716,1742]" italics="true" pageId="18" pageNumber="19">A. acropetalon</emphasis>
</taxonomicName>
a long apical projection on the apex of the paleae of the main group; however, the paleal shoulders of
<taxonomicName id="4BE5F2917172EF2ED634F972221195DE" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[368,551,1751,1778]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED634F972221195DE" box="[368,551,1751,1778]" italics="true" pageId="18" pageNumber="19">A. mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007172EF2ED569F972225D95DD" bold="true" box="[557,619,1752,1778]" pageId="18" pageNumber="19">
<taxonomicNameLabel id="A5A2E87B7172EF2ED569F972225D95DD" box="[557,619,1752,1778]" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
is wider than in
<taxonomicName id="4BE5F2917172EF2ED460F97223FE95DE" authorityName="Watson Russell" authorityYear="1998" box="[804,968,1751,1778]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="acropetalon">
<emphasis id="BE9155007172EF2ED460F97223FE95DE" box="[804,968,1751,1778]" italics="true" pageId="18" pageNumber="19">A. acropetalon</emphasis>
</taxonomicName>
, whose shoulders are shorter and rounded (
<bibRefCitation id="E874F4E37172EF2ED7DAF95121F1943A" author="Watson Russell, C." box="[158,455,1787,1813]" pageId="18" pageNumber="19" pagination="159 - 176" refId="ref38907" refString="Watson Russell, C. (1998) Description of Arichlidon new genus and two new species from Australia; Bhawania reyssi redescribed and assigned to Arichlidon (Chrysopetalidae: Polychaeta). The Beagle, Records of the Northern Territory Museum of Arts and Sciences, 14, 159 - 176." type="journal article" year="1998">Watson Russell 1998: 172</bibRefCitation>
,
<figureCitation id="14DE95977172EF2ED697F951227E9439" box="[467,584,1787,1814]" captionStart="FIGURE 6" captionStartId="14.[151,250,1943,1967]" captionTargetBox="[155,1389,181,1916]" captionTargetId="figure-26@14.[155,1432,181,1919]" captionTargetPageId="14" captionText="FIGURE 6. Paleanotus sp., non-type specimen (UMAR-Poly-017). A) Fragments. B) Parapodium from middle segment; B) Lateral paleae; C) Main palea; D–F) Median paleae; G–H) Unit 1; I) Unit 2; J) Unit 3; K) Unit 4; L) Pygidium, ventral view. Scales. Scales: 10 µm (HIJK), 20 µm (CDEFG), 100 µm (AB)." figureDoi="http://doi.org/10.5281/zenodo.5702040" httpUri="https://zenodo.org/record/5702040/files/figure.png" pageId="18" pageNumber="19">Fig. 6E–F</figureCitation>
).
</paragraph>
<paragraph id="8C5A89127172EF2ED783F8B4237694C3" blockId="18.[151,1437,652,2028]" pageId="18" pageNumber="19">
Despite
<taxonomicName id="4BE5F2917172EF2ED667F8B521D09417" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[291,486,1822,1849]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropealeum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED667F8B521D09417" box="[291,486,1822,1849]" italics="true" pageId="18" pageNumber="19">A. mucropealeum</emphasis>
</taxonomicName>
<emphasis id="BE9155007172EF2ED6A8F8B4221C9417" bold="true" box="[492,554,1822,1848]" pageId="18" pageNumber="19">
<taxonomicNameLabel id="A5A2E87B7172EF2ED6A8F8B4221C9417" box="[492,554,1822,1848]" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
does not completely resemble
<taxonomicName id="4BE5F2917172EF2ED4C4F8B525AE9417" authority="(Katzmann, Laubier and Ramos, 1974)" baseAuthorityName="Katzmann, Laubier and Ramos" baseAuthorityYear="1974" box="[896,1432,1822,1849]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="reyssi">
<emphasis id="BE9155007172EF2ED4C4F8B523E89417" box="[896,990,1823,1849]" italics="true" pageId="18" pageNumber="19">A. reyssi</emphasis>
(Katzmann, Laubier and Ramos, 1974)
</taxonomicName>
, a species described from the Adriatic Sea, both species stand out by sharing a long mid-most median palea, protruding above the main group level. However, the detailed observation of this paleal group also demonstrates that both species are different.
<taxonomicName id="4BE5F2917172EF2ED6C9F820229E948B" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[397,680,1930,1956]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007172EF2ED6C9F820229E948B" box="[397,680,1930,1956]" italics="true" pageId="18" pageNumber="19">Arichlidon mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007172EF2ED5F5F82022C4948B" bold="true" box="[689,754,1930,1956]" pageId="18" pageNumber="19">
<taxonomicNameLabel id="A5A2E87B7172EF2ED5F5F82022C4948B" box="[689,754,1930,1956]" pageId="18" pageNumber="19" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
possesses this median palea with lesser number of internal ribs [12–13
<emphasis id="BE9155007172EF2ED65BF805210094E7" box="[287,310,1967,1992]" italics="true" pageId="18" pageNumber="19">vs</emphasis>
15–17(18)], further, the paleal apex presents an apical projection, while
<taxonomicName id="4BE5F2917172EF2ED323F80424F194E7" baseAuthorityName="Katzmann, Laubier and Ramos" baseAuthorityYear="1974" box="[1127,1223,1966,1992]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="18" pageNumber="19" phylum="Annelida" rank="species" species="reyssi">
<emphasis id="BE9155007172EF2ED323F80424F194E7" box="[1127,1223,1966,1992]" italics="true" pageId="18" pageNumber="19">A. reyssi</emphasis>
</taxonomicName>
possesses a higher number of internal ribs and the paleal apex is inconspicuous.
</paragraph>
<caption id="D89AD99A7173EF2FD7D3F8CB23D594CA" ID-DOI="http://doi.org/10.5281/zenodo.5702046" ID-Zenodo-Dep="5702046" httpUri="https://zenodo.org/record/5702046/files/figure.png" pageId="19" pageNumber="20" startId="19.[151,250,1889,1913]" targetBox="[206,1381,181,1858]" targetPageId="19">
<paragraph id="8C5A89127173EF2FD7D3F8CB23D594CA" blockId="19.[151,1436,1889,2021]" pageId="19" pageNumber="20">
<emphasis id="BE9155007173EF2FD7D3F8CB21259456" bold="true" box="[151,275,1889,1913]" pageId="19" pageNumber="20">FIGURE 9.</emphasis>
<taxonomicName id="4BE5F2917173EF2FD65FF8CB222E9456" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[283,536,1889,1913]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="19" pageNumber="20" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007173EF2FD65FF8CB222E9456" box="[283,536,1889,1913]" italics="true" pageId="19" pageNumber="20">Arichlidon mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007173EF2FD55BF8CB226F9456" bold="true" box="[543,601,1889,1913]" pageId="19" pageNumber="20">
<taxonomicNameLabel id="A5A2E87B7173EF2FD55BF8CB226F9456" box="[543,601,1889,1913]" pageId="19" pageNumber="20" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
, holotype (ECOSUR-260). A) Complete fragmented body. B) Drawing of prostomium, dorsal view. C) Drawing of pygidium, ventral view. D) Parapodium from segment 22. E) Lateral paleae, arrow indicates wide palea. F) Main palea. G) Subunit1. H) Median palea, mid-most. I) Median palea, proximal-most. J) Unit 1. K) Unit 2. L–M) Unit 3. N–P) Unit 4. Scales: 50 µm (BCEFGHIJKLMNO), 200 µm (D), 1 mm (A).
</paragraph>
</caption>
<paragraph id="8C5A89127174EF28D783FF3D24CF93D6" blockId="20.[151,1437,151,429]" pageId="20" pageNumber="21">
Some differences were noted in the subunit 1 of both species. In
<taxonomicName id="4BE5F2917174EF28D4D1FF3D247B939E" authority="Cruz-Gómez, 2021" authorityName="Cruz-Gómez" authorityYear="2021" box="[917,1101,151,177]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="20" pageNumber="21" phylum="Annelida" rank="species" species="mucropaleum" status="sp. nov.">
<emphasis id="BE9155007174EF28D4D1FF3D247B939E" box="[917,1101,151,177]" italics="true" pageId="20" pageNumber="21">A. mucropaleum</emphasis>
</taxonomicName>
<emphasis id="BE9155007174EF28D317FF3D24A7939E" bold="true" box="[1107,1169,151,177]" pageId="20" pageNumber="21">
<taxonomicNameLabel id="A5A2E87B7174EF28D317FF3D24A7939E" box="[1107,1169,151,177]" pageId="20" pageNumber="21" rank="species">n. sp.</taxonomicNameLabel>
</emphasis>
the subunit 1 presents a convex proximal margin in the mid paleal level and its apex presents an apical projection; while the subunit
<quantity id="4B1D24F77174EF28D216FF11254B93FA" box="[1362,1405,187,213]" metricMagnitude="-2" metricUnit="m" metricValue="2.54" pageId="20" pageNumber="21" unit="in" value="1.0">1 in</quantity>
<taxonomicName id="4BE5F2917174EF28D2C0FF1120E193D7" baseAuthorityName="Katzmann, Laubier and Ramos" baseAuthorityYear="1974" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="20" pageNumber="21" phylum="Annelida" rank="species" species="reyssi">
<emphasis id="BE9155007174EF28D2C0FF1120E193D7" italics="true" pageId="20" pageNumber="21">A. reyssi</emphasis>
</taxonomicName>
, has the proximal margin uniformly curved in the mid palea level, and lacks apical projection.
</paragraph>
<paragraph id="8C5A89127174EF28D783FEA922C99232" blockId="20.[151,1437,151,429]" box="[199,767,259,285]" pageId="20" pageNumber="21">
This is the first record of
<taxonomicName id="4BE5F2917174EF28D6A0FEA9226A9232" authorityName="Watson Russell" authorityYear="1998" box="[484,604,259,285]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="20" pageNumber="21" phylum="Annelida" rank="genus">
<emphasis id="BE9155007174EF28D6A0FEA9226A9232" box="[484,604,259,285]" italics="true" pageId="20" pageNumber="21">Arichlidon</emphasis>
</taxonomicName>
from the TEP.
</paragraph>
</subSubSection>
<subSubSection id="C4FFDA997174EF28D783FE8D21949282" pageId="20" pageNumber="21" type="etymology">
<paragraph id="8C5A89127174EF28D783FE8D21949282" blockId="20.[151,1437,151,429]" pageId="20" pageNumber="21">
<emphasis id="BE9155007174EF28D783FE8D2178926E" bold="true" box="[199,334,295,321]" pageId="20" pageNumber="21">Etymology.</emphasis>
The specific epithet
<taxonomicName id="4BE5F2917174EF28D573FE8D22E6926E" authorityName="Cruz-Gómez" authorityYear="2021" box="[567,720,295,321]" class="Polychaeta" family="Chrysopetalidae" genus="Arichlidon" kingdom="Animalia" order="Phyllodocida" pageId="20" pageNumber="21" phylum="Annelida" rank="species" species="mucropaleum">
<emphasis id="BE9155007174EF28D573FE8D22E6926E" box="[567,720,295,321]" italics="true" pageId="20" pageNumber="21">mucropaleum</emphasis>
</taxonomicName>
is a combination of the Latin singular adjective
<emphasis id="BE9155007174EF28D3AFFE8D2558926F" box="[1259,1390,295,320]" italics="true" pageId="20" pageNumber="21">mucronatus</emphasis>
(
<emphasis id="BE9155007174EF28D23AFE8D25A3926F" box="[1406,1429,295,320]" italics="true" pageId="20" pageNumber="21">-a</emphasis>
,
<emphasis id="BE9155007174EF28D7D3FEE120F5924B" box="[151,195,331,356]" italics="true" pageId="20" pageNumber="21">-um</emphasis>
) meaning ‘provide with a final straight point’, and the Latin singular noun
<emphasis id="BE9155007174EF28D366FEE12456924A" box="[1058,1120,331,357]" italics="true" pageId="20" pageNumber="21">palea</emphasis>
meaning ‘scale’. The name indicates the sharp apical projection on the paleal apex of all paleae, and it is neuter for matching the genus gender (
<bibRefCitation id="E874F4E37174EF28D7DBFE3921129282" author="ICZN" box="[159,292,403,429]" pageId="20" pageNumber="21" refId="ref37026" refString="ICZN (1999) International Code of Zoological Nomenclature. 4 th Edition. International Trust for Zoological Nomenclature (The Natural History Museum), London, 306 pp." type="book" year="1999">ICZN 1999</bibRefCitation>
, Art. 31.2).
</paragraph>
</subSubSection>
</treatment>
</document>
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