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<document id="601301FD7201495C44D8089799EB11BB" ID-DOI="10.5281/zenodo.189729" ID-GBIF-Dataset="26744e03-61f8-4e09-acf1-1fc705f5cbec" ID-ISSN="1175-5326" ID-Zenodo-Dep="189729" IM.materialsCitations_approvedBy="felipe" IM.metadata_approvedBy="felipe" IM.tables_requiresApprovalFor="existingObjects,plazi" IM.taxonomicNames_approvedBy="felipe" checkinTime="1461104477324" checkinUser="plazi" docAuthor="Suárez-Morales, Eduardo &amp; Walsh, Elizabeth J." docDate="2009" docId="039D87D0E94FFFCFD5C2FA52C7B1FE5F" docLanguage="en" docName="zt02206p022.pdf" docOrigin="Zootaxa 2206" docStyle="DocumentStyle:890A69B780ED73D6DB8551B71C8AC79E.4:Zootaxa.2009-2012.journal_article" docStyleId="890A69B780ED73D6DB8551B71C8AC79E" docStyleName="Zootaxa.2009-2012.journal_article" docStyleVersion="4" docTitle="Eucyclops chihuahuensis Suárez-Morales &amp; Walsh, 2009, sp. nov." docType="treatment" docVersion="8" lastPageNumber="18" masterDocId="FFA4FFA8E941FFDDD555FFC6C521FFC5" masterDocTitle="Two new species of Eucyclops Claus (Copepoda: Cyclopoida) from the Chihuahuan Desert with a redescription of E. pseudoensifer Dussart" masterLastPageNumber="22" masterPageNumber="1" pageNumber="15" updateTime="1698592487973" updateUser="plazi">
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<mods:title id="60793D7CB452A687A1A6585523BC0938">Two new species of Eucyclops Claus (Copepoda: Cyclopoida) from the Chihuahuan Desert with a redescription of E. pseudoensifer Dussart</mods:title>
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<mods:namePart id="6B356E25E70375901E66885E2B127D92">Suárez-Morales, Eduardo</mods:namePart>
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<mods:namePart id="E5EF3C4529481D0A1E70D781B55C9222">Walsh, Elizabeth J.</mods:namePart>
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<mods:date id="B054B585243B3E696E504578AFDE349F">2009</mods:date>
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<treatment id="039D87D0E94FFFCFD5C2FA52C7B1FE5F" ID-DOI="http://doi.org/10.5281/zenodo.5625828" ID-GBIF-Taxon="119622724" ID-Zenodo-Dep="5625828" LSID="urn:lsid:plazi:treatment:039D87D0E94FFFCFD5C2FA52C7B1FE5F" httpUri="http://treatment.plazi.org/id/039D87D0E94FFFCFD5C2FA52C7B1FE5F" lastPageId="18" lastPageNumber="18" pageId="14" pageNumber="15">
<subSubSection id="C32E654DE94FFFD3D5C2FA52C43EFA11" pageId="14" pageNumber="15" type="nomenclature">
<paragraph id="8B8B36C6E94FFFD3D5C2FA52C711FA68" blockId="14.[151,560,1427,1492]" box="[151,560,1427,1454]" pageId="14" pageNumber="15">
<heading id="D0C381AAE94FFFD3D5C2FA52C711FA68" bold="true" box="[151,560,1427,1454]" fontSize="11" level="1" pageId="14" pageNumber="15" reason="1">
<emphasis id="B940EAD4E94FFFD3D5C2FA52C711FA68" bold="true" box="[151,560,1427,1454]" pageId="14" pageNumber="15">
<taxonomicName id="4C344D45E94FFFD3D5C2FA52C4EDFA6B" box="[151,460,1428,1454]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="chihuahuensis" status="sp. nov.">
<emphasis id="B940EAD4E94FFFD3D5C2FA52C4EDFA6B" bold="true" box="[151,460,1428,1454]" italics="true" pageId="14" pageNumber="15">Eucyclops chihuahuensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A27357AFE94FFFD3D486FA55C711FA68" box="[467,560,1427,1453]" pageId="14" pageNumber="15" rank="species">sp. nov.</taxonomicNameLabel>
</emphasis>
</heading>
</paragraph>
<paragraph id="8B8B36C6E94FFFD3D5C2FA7CC43EFA11" blockId="14.[151,560,1427,1492]" box="[151,287,1466,1492]" pageId="14" pageNumber="15">
(
<figureCitation id="130F2A43E94FFFD3D5CAFA7CC5CAFA11" box="[159,235,1466,1492]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="14" pageNumber="15">Figs 9</figureCitation>
,
<figureCitation id="130F2A43E94FFFD3D5ADFA7CC437FA11" box="[248,278,1466,1492]" captionStart="FIGURE 10" captionStartId="16.[151,255,1899,1923]" captionTargetBox="[191,1341,325,1876]" captionTargetId="figure@16.[191,1390,325,1911]" captionTargetPageId="16" captionText="FIGURE 10. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) leg 1; B) leg 2; C) leg 2; D) leg 4; E) coxal plate of leg 1; F) coxal plate of leg 1; G) coxal plate of leg 3; H) coxal plate of leg 4. Scale bars A G = 50 μm. All appendages shown in frontal view." httpUri="https://zenodo.org/record/189739/files/figure.png" pageId="14" pageNumber="15">10</figureCitation>
)
</paragraph>
</subSubSection>
<subSubSection id="C32E654DE94FFFD3D5C2F9C1C7C4F892" pageId="14" pageNumber="15" type="materials_examined">
<paragraph id="8B8B36C6E94FFFD3D5C2F9C1C69DF8CF" blockId="14.[151,1436,1543,2034]" pageId="14" pageNumber="15">
<emphasis id="B940EAD4E94FFFD3D5C2F9C1C4AAF9E4" bold="true" box="[151,395,1543,1569]" pageId="14" pageNumber="15">Material examined.</emphasis>
<typeStatus id="548F8864E94FFFD3D4C7F9CEC722F9E7" box="[402,515,1544,1570]" pageId="14" pageNumber="15" type="holotype">Holotype</typeStatus>
. Adult female, dissected, mounted in glycerine sealed with Entellan, deposited in the zooplankton collection of ECOSUR (ECO-CHZ- 3589), collected from Presa Chihuahua, a reservoir near the city of Chihuahua, northern
<collectingCountry id="F3237656E94FFFD3D70CF993C794F9AA" box="[601,693,1621,1647]" name="Mexico" pageId="14" pageNumber="15">Mexico</collectingCountry>
(28°
<geoCoordinate id="EE005001E94FFFD3D7B9F993C644F9AA" box="[748,869,1621,1647]" direction="north" orientation="latitude" pageId="14" pageNumber="15" precision="55" value="34.54">34.540 N</geoCoordinate>
; 106°09. 932 W),
<date id="FF8A1006E94FFFD3D113F993C1C1F9AA" box="[1094,1248,1621,1647]" pageId="14" pageNumber="15" value="2006-07-07">July 7, 2006</date>
; coll. Elizabeth Walsh and colleagues.
<typeStatus id="548F8864E94FFFD3D4E7F9BAC70CF953" box="[434,557,1660,1686]" pageId="14" pageNumber="15" type="paratype">Paratypes</typeStatus>
. One undissected adult female, mounted in glycerine, slide sealed with Entellan (ECO-CHZ-3590), same date, site, and collector. Four undissected adult females, ethanol-preserved (ECO-CHZ-3590), same locality and date. Additional, non-paratype specimens and original zooplankton sample in the laboratory of E. Walsh, University of Texas at El Paso.
</paragraph>
<paragraph id="8B8B36C6E94FFFD3D590F8D0C7C4F892" blockId="14.[151,1436,1543,2034]" pageId="14" pageNumber="15">
<emphasis id="B940EAD4E94FFFD3D590F8D0C446F8F5" bold="true" box="[197,359,1814,1840]" pageId="14" pageNumber="15">
<typeStatus id="548F8864E94FFFD3D590F8D0C423F8F5" box="[197,258,1814,1840]" pageId="14" pageNumber="15">Type</typeStatus>
locality.
</emphasis>
Presa Chihuahua, Chihuahua,
<collectingCountry id="F3237656E94FFFD3D79CF8D0C600F8F5" box="[713,801,1814,1840]" name="Mexico" pageId="14" pageNumber="15">Mexico</collectingCountry>
(28°
<geoCoordinate id="EE005001E94FFFD3D603F8D0C6EAF8F5" box="[854,971,1814,1840]" direction="north" orientation="latitude" pageId="14" pageNumber="15" precision="55" value="34.54">34.540 N</geoCoordinate>
; 106°09. 932 W), a man-made reservoir located
<quantity id="4CCC9B23E94FFFD3D5A5F8FBC41BF892" box="[240,314,1853,1879]" metricMagnitude="4" metricUnit="m" metricValue="1.2" pageId="14" pageNumber="15" unit="km" value="12.0">12 km</quantity>
from the city of Chihuahua,
<collectingCountry id="F3237656E94FFFD3D7D0F8FBC7C0F892" box="[645,737,1853,1879]" name="Mexico" pageId="14" pageNumber="15">Mexico</collectingCountry>
.
</paragraph>
</subSubSection>
<subSubSection id="C32E654DE94FFFD3D590F8A5C04BF861" pageId="14" pageNumber="15" type="etymology">
<paragraph id="8B8B36C6E94FFFD3D590F8A5C04BF861" blockId="14.[151,1436,1543,2034]" pageId="14" pageNumber="15">
<emphasis id="B940EAD4E94FFFD3D590F8A5C473F8BB" bold="true" box="[197,338,1891,1918]" pageId="14" pageNumber="15">Etymology.</emphasis>
The name of this species makes reference to the reservoir and the arid environmental system from which this species was collected. The name is an adjective for place, using the Latin suffix “-ensis”.
</paragraph>
</subSubSection>
<subSubSection id="C32E654DE94FFFCCD593F876C482FC1B" lastPageId="17" lastPageNumber="18" pageId="14" pageNumber="15" type="description">
<paragraph id="8B8B36C6E94FFFD3D593F876C1FCF837" blockId="14.[151,1436,1543,2034]" pageId="14" pageNumber="15">
<emphasis id="B940EAD4E94FFFD3D593F876C47FF80F" bold="true" box="[198,350,1968,1994]" pageId="14" pageNumber="15">Description.</emphasis>
FEMALE (
<figureCitation id="130F2A43E94FFFD3D4A4F877C71AF80E" box="[497,571,1969,1995]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="14" pageNumber="15">Fig. 9</figureCitation>
A): Total body length = 0.640
<emphasis id="B940EAD4E94FFFD3D6E4F877C6E0F80F" box="[945,961,1969,1994]" italics="true" pageId="14" pageNumber="15">±</emphasis>
<quantity id="4CCC9B23E94FFFD3D69EF877C164F80E" box="[971,1093,1969,1995]" metricMagnitude="-5" metricUnit="m" metricValue="4.299999999999999" pageId="14" pageNumber="15" unit="mm" value="0.043">0.043 mm</quantity>
(n= 6) from anterior end of cephalothorax to posterior margin of caudal rami. Body as in
<taxonomicName id="4C344D45E94FFFD3D63DF81EC1F8F837" authority="Dussart, 1984" authorityName="Dussart" authorityYear="1984" box="[872,1241,2008,2034]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="14" pageNumber="15" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E94FFFD3D63DF81EC10DF834" box="[872,1068,2008,2033]" italics="true" pageId="14" pageNumber="15">E. pseudoensifer</emphasis>
Dussart, 1984
</taxonomicName>
.
</paragraph>
<paragraph id="8B8B36C6E94EFFD2D590FF5EC600FE89" blockId="15.[151,1436,152,332]" pageId="15" pageNumber="16">
Antennule (
<figureCitation id="130F2A43E94EFFD2D403FF5EC483FF77" box="[342,418,152,178]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="15" pageNumber="16">Fig. 9</figureCitation>
B):
<collectingCountry id="F3237656E94EFFD2D485FF5EC4D3FF77" box="[464,498,152,178]" name="American Samoa" pageId="15" pageNumber="16">As</collectingCountry>
in
<taxonomicName id="4C344D45E94EFFD2D74EFF5EC7C8FF74" box="[539,745,152,177]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E94EFFD2D74EFF5EC7C8FF74" box="[539,745,152,177]" italics="true" pageId="15" pageNumber="16">E. pseudoensifer</emphasis>
</taxonomicName>
except for absence of proximal row of spinules on first segment, one seta less on segment 2 and 6, and last segment 1.15 times as long as penultimate one. Antenna (
<figureCitation id="130F2A43E94EFFD2D46DFF23C45EFF3A" box="[312,383,229,255]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="15" pageNumber="16">Fig. 9</figureCitation>
C):
<collectingCountry id="F3237656E94EFFD2D4FFFF23C4EAFF3A" box="[426,459,229,255]" name="American Samoa" pageId="15" pageNumber="16">As</collectingCountry>
in
<taxonomicName id="4C344D45E94EFFD2D4A5FF23C795FF3B" box="[496,692,229,254]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E94EFFD2D4A5FF23C795FF3B" box="[496,692,229,254]" italics="true" pageId="15" pageNumber="16">E. pseudoensifer</emphasis>
</taxonomicName>
except for lighter ornamentation of caudal surface of basipod. Mouthparts including mandible, maxillule, maxilla, and maxillipeds as in
<taxonomicName id="4C344D45E94EFFD2D176FECAC069FEE3" authority="Reid 1992" authorityName="Reid" authorityYear="1992" box="[1059,1352,268,294]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="conrowae">
<emphasis id="B940EAD4E94EFFD2D176FECAC194FEE0" box="[1059,1205,268,293]" italics="true" pageId="15" pageNumber="16">E. conrowae</emphasis>
(
<bibRefCitation id="EFA54B37E94EFFD2D191FECAC061FEE3" author="Reid" box="[1220,1344,268,294]" pageId="15" pageNumber="21" refString="Reid, J. W. (1992) Copepoda (Crustacea) from fresh waters of the Florida Everglades, U. S. A., with a description of Eucyclops conrowae n. sp. Transactions of the American Microscopical Society, 111, 229 - 254." type="journal article" year="1992">Reid 1992</bibRefCitation>
)
</taxonomicName>
except for mandibles armed with only 6 blunt bicuspidal teeth.
</paragraph>
<caption id="DF4B664EE94EFFD2D5C2F8A4C6A2F87B" httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="15" pageNumber="16" targetBox="[246,1319,384,1866]" targetPageId="15">
<paragraph id="8B8B36C6E94EFFD2D5C2F8A4C6A2F87B" blockId="15.[151,1436,1890,1982]" pageId="15" pageNumber="16">
<emphasis id="B940EAD4E94EFFD2D5C2F8A4C43EF8BF" bold="true" box="[151,287,1890,1914]" pageId="15" pageNumber="16">FIGURE 9.</emphasis>
<taxonomicName id="4C344D45E94EFFD2D473F8A4C71EF8BC" box="[294,575,1890,1913]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="15" pageNumber="16" phylum="Arthropoda" rank="species" species="chihuahuensis" status="sp. nov.">
<emphasis id="B940EAD4E94EFFD2D473F8A4C71EF8BC" box="[294,575,1890,1913]" italics="true" pageId="15" pageNumber="16">Eucyclops chihuahuensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A27357AFE94EFFD2D712F8A4C780F8BF" box="[583,673,1890,1914]" pageId="15" pageNumber="16" rank="species">
<emphasis id="B940EAD4E94EFFD2D712F8A4C780F8BF" bold="true" box="[583,673,1890,1914]" pageId="15" pageNumber="16">sp. nov.</emphasis>
</taxonomicNameLabel>
, adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A=100 μm, BD=50 μm.
</paragraph>
</caption>
<paragraph id="8B8B36C6E951FFCCD590FF5EC615FEE3" blockId="16.[151,1437,152,294]" lastBlockId="17.[151,1437,152,2034]" lastPageId="17" lastPageNumber="18" pageId="16" pageNumber="17">
Leg 1 (
<figureCitation id="130F2A43E951FFCDD44FFF5EC450FF77" box="[282,369,152,178]" captionStart="FIGURE 10" captionStartId="16.[151,255,1899,1923]" captionTargetBox="[191,1341,325,1876]" captionTargetId="figure@16.[191,1390,325,1911]" captionTargetPageId="16" captionText="FIGURE 10. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) leg 1; B) leg 2; C) leg 2; D) leg 4; E) coxal plate of leg 1; F) coxal plate of leg 1; G) coxal plate of leg 3; H) coxal plate of leg 4. Scale bars A G = 50 μm. All appendages shown in frontal view." httpUri="https://zenodo.org/record/189739/files/figure.png" pageId="16" pageNumber="17">Fig. 10</figureCitation>
A):
<collectingCountry id="F3237656E951FFCDD4CAFF5EC4E1FF77" box="[415,448,152,178]" name="American Samoa" pageId="16" pageNumber="17">As</collectingCountry>
in
<taxonomicName id="4C344D45E951FFCDD4B3FF5EC78AFF74" box="[486,683,152,177]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="16" pageNumber="17" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E951FFCDD4B3FF5EC78AFF74" box="[486,683,152,177]" italics="true" pageId="16" pageNumber="17">E. pseudoensifer</emphasis>
</taxonomicName>
except for coupler with curved rows of 58 spinules on medial surface plus rows of long hair-like elements on distal margin (
<figureCitation id="130F2A43E951FFCDD62BFF78C6E4FF1D" box="[894,965,190,216]" captionStart="FIGURE 6" captionStartId="11.[151,258,1804,1828]" captionTargetBox="[200,1397,196,1764]" captionTargetId="figure@11.[172,1415,158,1780]" captionTargetPageId="11" captionText="FIGURE 6. Eucyclops pseudoensifer Dussart, 1984, adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. A) antenna; B) leg 1; C) leg 2; D) leg 3. Scale bars A D = 50 μm." httpUri="https://zenodo.org/record/189735/files/figure.png" pageId="16" pageNumber="17">Fig. 6</figureCitation>
E), coxa with rows of spinules on outer proximal surface, medial row of 68 spinules plus subdistal row of 46 short hair-like elements along outer margin. Basis with long, pinnate spiniform basipodal seta reaching distal margin of second endopodal Leg 2 (
<figureCitation id="130F2A43E950FFCCD44EFF5EC454FF77" box="[283,373,152,178]" captionStart="FIGURE 10" captionStartId="16.[151,255,1899,1923]" captionTargetBox="[191,1341,325,1876]" captionTargetId="figure@16.[191,1390,325,1911]" captionTargetPageId="16" captionText="FIGURE 10. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) leg 1; B) leg 2; C) leg 2; D) leg 4; E) coxal plate of leg 1; F) coxal plate of leg 1; G) coxal plate of leg 3; H) coxal plate of leg 4. Scale bars A G = 50 μm. All appendages shown in frontal view." httpUri="https://zenodo.org/record/189739/files/figure.png" pageId="17" pageNumber="18">Fig. 10</figureCitation>
B):
<collectingCountry id="F3237656E950FFCCD4F4FF5EC4E3FF77" box="[417,450,152,178]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD4BFFF5EC793FF74" box="[490,690,152,177]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD4BFFF5EC793FF74" box="[490,690,152,177]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
except for coupler strongly pilose, with transverse clusters of long hair-like elements on anterior, medial and distal surfaces (
<figureCitation id="130F2A43E950FFCCD6D1FF78C6EAFF1D" box="[900,971,190,216]" captionStart="FIGURE 6" captionStartId="11.[151,258,1804,1828]" captionTargetBox="[200,1397,196,1764]" captionTargetId="figure@11.[172,1415,158,1780]" captionTargetPageId="11" captionText="FIGURE 6. Eucyclops pseudoensifer Dussart, 1984, adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. A) antenna; B) leg 1; C) leg 2; D) leg 3. Scale bars A D = 50 μm." httpUri="https://zenodo.org/record/189735/files/figure.png" pageId="17" pageNumber="18">Fig. 6</figureCitation>
F), coxa with outer margin ornamented with proximal and subdistal rows of long hair-like elements. Basis with slender basipodal seta on outer margin reaching beyond distal margin of first exopodal segment.
</paragraph>
<caption id="DF4B664EE951FFCDD5C2F8ADC675F80D" httpUri="https://zenodo.org/record/189739/files/figure.png" pageId="16" pageNumber="17" targetBox="[191,1341,325,1876]" targetPageId="16">
<paragraph id="8B8B36C6E951FFCDD5C2F8ADC675F80D" blockId="16.[151,1436,1899,1992]" pageId="16" pageNumber="17">
<emphasis id="B940EAD4E951FFCDD5C2F8ADC406F846" bold="true" box="[151,295,1899,1923]" pageId="16" pageNumber="17">FIGURE 10.</emphasis>
<taxonomicName id="4C344D45E951FFCDD47BF8AAC71DF846" box="[302,572,1900,1923]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="16" pageNumber="17" phylum="Arthropoda" rank="species" species="chihuahuensis" status="sp. nov.">
<emphasis id="B940EAD4E951FFCDD47BF8AAC71DF846" box="[302,572,1900,1923]" italics="true" pageId="16" pageNumber="17">Eucyclops chihuahuensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A27357AFE951FFCDD711F8ADC7B8F846" box="[580,665,1899,1923]" pageId="16" pageNumber="17" rank="species">
<emphasis id="B940EAD4E951FFCDD711F8ADC7B8F846" bold="true" box="[580,665,1899,1923]" pageId="16" pageNumber="17">sp. nov.</emphasis>
</taxonomicNameLabel>
, adult female holotype from Presa Chihuahua, northern Mexico. A) leg 1; B) leg 2; C) leg 2; D) leg 4; E) coxal plate of leg 1; F) coxal plate of leg 1; G) coxal plate of leg 3; H) coxal plate of leg 4. Scale bars AG=50 μm. All appendages shown in frontal view.
</paragraph>
</caption>
<paragraph id="8B8B36C6E950FFCCD590FEF4C426FEB6" blockId="17.[151,1437,152,2034]" pageId="17" pageNumber="18">
Leg 3 (
<figureCitation id="130F2A43E950FFCCD44CFEF4C44EFE89" box="[281,367,306,332]" captionStart="FIGURE 10" captionStartId="16.[151,255,1899,1923]" captionTargetBox="[191,1341,325,1876]" captionTargetId="figure@16.[191,1390,325,1911]" captionTargetPageId="16" captionText="FIGURE 10. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) leg 1; B) leg 2; C) leg 2; D) leg 4; E) coxal plate of leg 1; F) coxal plate of leg 1; G) coxal plate of leg 3; H) coxal plate of leg 4. Scale bars A G = 50 μm. All appendages shown in frontal view." httpUri="https://zenodo.org/record/189739/files/figure.png" pageId="17" pageNumber="18">Fig. 10</figureCitation>
C):
<collectingCountry id="F3237656E950FFCCD4CEFEF4C49DFE89" box="[411,444,306,332]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD4B4FEF4C784FE8E" box="[481,677,306,331]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD4B4FEF4C784FE8E" box="[481,677,306,331]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
except for coupler with 2 transverse rows of 810 long hair-like elements.
</paragraph>
<paragraph id="8B8B36C6E950FFCCD590FE46C7FBFDF1" blockId="17.[151,1437,152,2034]" pageId="17" pageNumber="18">
Leg 4 (
<figureCitation id="130F2A43E950FFCCD44DFE46C44FFE5F" box="[280,366,384,410]" captionStart="FIGURE 10" captionStartId="16.[151,255,1899,1923]" captionTargetBox="[191,1341,325,1876]" captionTargetId="figure@16.[191,1390,325,1911]" captionTargetPageId="16" captionText="FIGURE 10. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) leg 1; B) leg 2; C) leg 2; D) leg 4; E) coxal plate of leg 1; F) coxal plate of leg 1; G) coxal plate of leg 3; H) coxal plate of leg 4. Scale bars A G = 50 μm. All appendages shown in frontal view." httpUri="https://zenodo.org/record/189739/files/figure.png" pageId="17" pageNumber="18">Fig. 10</figureCitation>
D):
<collectingCountry id="F3237656E950FFCCD4CEFE46C49AFE5F" box="[411,443,384,410]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD4B4FE46C784FE5C" box="[481,677,384,409]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD4B4FE46C784FE5C" box="[481,677,384,409]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
except for longer coxal seta, reaching well beyond distal margin of basipodite, coxa ornamented with outer row of long spinules. Outer and inner terminal endopodal spines finely serrate along outer margin only; inner margins smooth. Length ratio of inner/outer terminal spines of Enp 3= 1.5. Length/width ratio of third endopodal segment= 2.4. Insertion point of outer seta of Enp 3= 66%. Length of inner endopodal spine/endopod 3= 1.3.
</paragraph>
<paragraph id="8B8B36C6E950FFCCD590FD87C0BDFD9E" blockId="17.[151,1437,152,2034]" box="[197,1436,577,603]" pageId="17" pageNumber="18">
Leg 5 (
<figureCitation id="130F2A43E950FFCCD442FD87C47FFD9E" box="[279,350,577,603]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="17" pageNumber="18">Fig. 9</figureCitation>
E):
<collectingCountry id="F3237656E950FFCCD4D2FD87C486FD9E" box="[391,423,577,603]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD499FD87C7B1FD9F" box="[460,656,577,602]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD499FD87C7B1FD9F" box="[460,656,577,602]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
except for outer seta as long as or slightly shorter than inner spine.
</paragraph>
<paragraph id="8B8B36C6E950FFCCD593FDAEC7DCFD47" blockId="17.[151,1437,152,2034]" box="[198,765,616,642]" pageId="17" pageNumber="18">
Vestigial leg 6 (
<figureCitation id="130F2A43E950FFCCD42BFDAEC4E4FD47" box="[382,453,616,642]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="17" pageNumber="18">Fig. 9</figureCitation>
E):
<collectingCountry id="F3237656E950FFCCD4BBFDAEC72EFD47" box="[494,527,616,642]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD761FDAEC7D7FD44" box="[564,758,616,641]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD761FDAEC7D7FD44" box="[564,758,616,641]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
.
</paragraph>
<paragraph id="8B8B36C6E950FFCCD590FD48C4A4FD0A" blockId="17.[151,1437,152,2034]" pageId="17" pageNumber="18">
Urosome (
<figureCitation id="130F2A43E950FFCCD415FD48C4AAFD6D" box="[320,395,654,680]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="17" pageNumber="18">Figs 9</figureCitation>
A, E):
<collectingCountry id="F3237656E950FFCCD48FFD48C4DAFD6D" box="[474,507,654,680]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD775FD49C7C5FD6D" box="[544,740,655,680]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD775FD49C7C5FD6D" box="[544,740,655,680]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
except for genital double somite representing 12.212.8 % of total body length.
</paragraph>
<paragraph id="8B8B36C6E950FFCCD590FD1AC460FC72" blockId="17.[151,1437,152,2034]" pageId="17" pageNumber="18">
Caudal rami (
<figureCitation id="130F2A43E950FFCCD43DFD1AC491FD33" box="[360,432,732,758]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="17" pageNumber="18">Fig. 9</figureCitation>
D):
<collectingCountry id="F3237656E950FFCCD48BFD1AC4DEFD33" box="[478,511,732,758]" name="American Samoa" pageId="17" pageNumber="18">As</collectingCountry>
in
<taxonomicName id="4C344D45E950FFCCD773FD1AC7CDFD30" box="[550,748,732,757]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD773FD1AC7CDFD30" box="[550,748,732,757]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
except for rami representing 14.5 % of total body length. Length/width ratio= 4.34.5. Outer margin armed with row of slender spinules arranged in tight pattern increasing in size distally. Lateralmost terminal spiniform seta relatively long, 0.50 times as long and 3.1 as wide as caudal ramus. Dorsal seta 0.430.45 times as long as caudal ramus. Inner medialmost terminal seta longest, proximal half smooth, followed by regular plumose pattern. Innermost terminal seta 0.85 times as long as ramus.
</paragraph>
<paragraph id="8B8B36C6E950FFCCD590FC02C482FC1B" blockId="17.[151,1437,152,2034]" box="[197,419,964,990]" pageId="17" pageNumber="18">MALE: Unknown.</paragraph>
</subSubSection>
<subSubSection id="C32E654DE950FFCFD593FC2CC7B1FE5F" lastPageId="18" lastPageNumber="19" pageId="17" pageNumber="18" type="discussion">
<paragraph id="8B8B36C6E950FFCCD593FC2CC1C1FA3E" blockId="17.[151,1437,152,2034]" pageId="17" pageNumber="18">
<emphasis id="B940EAD4E950FFCCD593FC2CC461FBC1" bold="true" box="[198,320,1002,1028]" pageId="17" pageNumber="18">Remarks.</emphasis>
The new species is similar in general proportions, habitus, and structure of the leg 5 to the general morphological pattern of
<taxonomicName id="4C344D45E950FFCCD74BFBD7C6ADFBEE" authority="Dussart, 1984" authorityName="Dussart" authorityYear="1984" box="[542,908,1041,1067]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD74BFBD7C7C0FBEF" box="[542,737,1041,1066]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
Dussart, 1984
</taxonomicName>
(see Dussart 1984). Following Reids (1985) work on the Neotropical
<taxonomicName id="4C344D45E950FFCCD498FBFEC7BCFB97" authority="Claus" authorityName="Claus" box="[461,669,1080,1106]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="genus">
<emphasis id="B940EAD4E950FFCCD498FBFEC76AFB94" box="[461,587,1080,1105]" italics="true" pageId="17" pageNumber="18">Eucyclops</emphasis>
Claus
</taxonomicName>
, this new species keys out to the South American
<taxonomicName id="4C344D45E950FFCCD05BFBFEC41CFBBD" authority="Brian, 1927" authorityName="Brian" authorityYear="1927" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="silvestrii">
<emphasis id="B940EAD4E950FFCCD05BFBFEC0BDFB94" box="[1294,1436,1080,1105]" italics="true" pageId="17" pageNumber="18">E. silvestrii</emphasis>
(Brian, 1927)
</taxonomicName>
, both species share some important characters such as: length/width ratio of the caudal rami around 4.0, outer margin of caudal rami mostly serrate, short dorsal seta, outer spiniform caudal seta more than two times as wide as ramus, spine of the fifth leg as long as outer seta, last antenular segment longer than penultimate one. The new species differs from
<taxonomicName id="4C344D45E950FFCCD797FB15C669FB29" box="[706,840,1235,1260]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="silvestrii">
<emphasis id="B940EAD4E950FFCCD797FB15C669FB29" box="[706,840,1235,1260]" italics="true" pageId="17" pageNumber="18">E. silvestrii</emphasis>
</taxonomicName>
in several characters including: the relative length of the last antennular segment (
<quantity id="4CCC9B23E950FFCCD745FB3FC774FAD6" box="[528,597,1273,1299]" metricMagnitude="-2" metricUnit="m" metricValue="3.302" pageId="17" pageNumber="18" unit="in" value="1.3">1.3 in</quantity>
<taxonomicName id="4C344D45E950FFCCD708FB3FC608FAD7" box="[605,809,1273,1298]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="chihuahuensis" status="sp. nov.">
<emphasis id="B940EAD4E950FFCCD708FB3FC608FAD7" box="[605,809,1273,1298]" italics="true" pageId="17" pageNumber="18">E. chihuahuensis</emphasis>
</taxonomicName>
<taxonomicNameLabel id="A27357AFE950FFCCD667FB3EC6B0FAD7" box="[818,913,1272,1298]" pageId="17" pageNumber="18" rank="species">
<emphasis id="B940EAD4E950FFCCD667FB3EC6B0FAD7" bold="true" box="[818,913,1272,1298]" pageId="17" pageNumber="18">sp. nov.</emphasis>
</taxonomicNameLabel>
vs. more than
<quantity id="4CCC9B23E950FFCCD111FB3FC1A8FAD6" box="[1092,1161,1273,1299]" metricMagnitude="-2" metricUnit="m" metricValue="3.81" pageId="17" pageNumber="18" unit="in" value="1.5">1.5 in</quantity>
<taxonomicName id="4C344D45E950FFCCD1C4FB3FC03BFAD7" box="[1169,1306,1273,1298]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="silvestrii">
<emphasis id="B940EAD4E950FFCCD1C4FB3FC03BFAD7" box="[1169,1306,1273,1298]" italics="true" pageId="17" pageNumber="18">E. silvestrii</emphasis>
</taxonomicName>
) (see
<bibRefCitation id="EFA54B37E950FFCCD031FB3FC5F9FAFF" author="Reid" pageId="17" pageNumber="21" refString="Reid, J. W. (1985) Chave de identificacao e lista de referencias bibliograficas para as especies continentais sulamericanas de vida livre da ordem Cyclopoida (Crustacea, Copepoda). Boletim de Zoologia, Universidade de Sao Paulo, 9, 17 - 143." type="journal article" year="1985">Reid 1985</bibRefCitation>
), the length of the middle seta of the fifth leg is twice as long as the outer seta in the new species, whereas both elements are equally long in
<taxonomicName id="4C344D45E950FFCCD7C6FA81C638FAA5" box="[659,793,1351,1376]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="silvestrii">
<emphasis id="B940EAD4E950FFCCD7C6FA81C638FAA5" box="[659,793,1351,1376]" italics="true" pageId="17" pageNumber="18">E. silvestrii</emphasis>
</taxonomicName>
(see
<bibRefCitation id="EFA54B37E950FFCCD60CFA80C6F6FAA5" author="Reid" box="[857,983,1350,1376]" pageId="17" pageNumber="21" refString="Reid, J. W. (1985) Chave de identificacao e lista de referencias bibliograficas para as especies continentais sulamericanas de vida livre da ordem Cyclopoida (Crustacea, Copepoda). Boletim de Zoologia, Universidade de Sao Paulo, 9, 17 - 143." type="journal article" year="1985">Reid 1985</bibRefCitation>
, fig. 128). The serration pattern of the caudal rami is different in both species, elements are smaller and more numerous in
<taxonomicName id="4C344D45E950FFCCD1CDFAABC003FA43" box="[1176,1314,1389,1414]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="silvestrii">
<emphasis id="B940EAD4E950FFCCD1CDFAABC003FA43" box="[1176,1314,1389,1414]" italics="true" pageId="17" pageNumber="18">E. silvestrii</emphasis>
</taxonomicName>
(see
<bibRefCitation id="EFA54B37E950FFCCD036FAABC5F5FA6B" author="Reid" pageId="17" pageNumber="21" refString="Reid, J. W. (1985) Chave de identificacao e lista de referencias bibliograficas para as especies continentais sulamericanas de vida livre da ordem Cyclopoida (Crustacea, Copepoda). Boletim de Zoologia, Universidade de Sao Paulo, 9, 17 - 143." type="journal article" year="1985">Reid 1985</bibRefCitation>
, fig. 127) than in the new species, in which the distal spinules of the serra are elongate, the length/width ratio of the caudal rami is less than 4.0 in
<taxonomicName id="4C344D45E950FFCCD7DDFA7DC62FFA11" box="[648,782,1467,1492]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="silvestrii">
<emphasis id="B940EAD4E950FFCCD7DDFA7DC62FFA11" box="[648,782,1467,1492]" italics="true" pageId="17" pageNumber="18">E. silvestrii</emphasis>
</taxonomicName>
, thus differing from the figure in the new species (4.3 4.6). Additional morphometric differences between these species are presented in the
<tableCitation id="C6B6037DE950FFCCD1D6FA27C1FDFA3E" box="[1155,1244,1505,1531]" captionStart="TABLE 2" captionStartId="9.[151,240,495,519]" captionTargetBox="[151,1436,685,1321]" captionTargetPageId="9" captionText="TABLE 2. Comparison of selected morphometric characters of adult females of some American species of Eucyclops Claus, 1893, including E. cuatrocienegas sp. nov. and E. chihuahuensis sp. nov. CR = caudal ramus; P 4 end 3 = fourth leg endopod, third segment; I = inner terminal spine of P 4 end 3; O = outer terminal spine of P 4 end 3; IS = spine of fifth legs; OS = outer seta of fifth legs; SC = Coverage of serra on external margin of caudal rami. Data from Kiefer (1925), Reid (1985, 1992), Grimaldo-Ortega et al. (1998), Dussart &amp; Defaye (2001), and Suárez-Morales (2004)." httpUri="http://table.plazi.org/id/DF4B664EE948FFD4D5C2FE29C19DFD54" pageId="17" pageNumber="18" tableUuid="DF4B664EE948FFD4D5C2FE29C19DFD54">Table 2</tableCitation>
.
</paragraph>
<paragraph id="8B8B36C6E950FFCFD590F9CEC7B1FE5F" blockId="17.[151,1437,152,2034]" lastBlockId="18.[151,1437,152,410]" lastPageId="18" lastPageNumber="19" pageId="17" pageNumber="18">
This species has, of course, a strong resemblance with
<taxonomicName id="4C344D45E950FFCCD632F9CEC1C4F9E7" authority="Dussart, 1984" authorityName="Dussart" authorityYear="1984" box="[871,1253,1544,1570]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD632F9CEC112F9E4" box="[871,1075,1544,1569]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
Dussart, 1984
</taxonomicName>
because of the similar body proportions, lateral margins of the thoracic somites 24 produced posteriorly and overlapping the succeeding somites, the length/width ratio of the caudal rami, the relative lengths of the caudal setae, and the general structure of the fifth leg (see
<tableCitation id="C6B6037DE950FFCCD701F9BAC791F953" box="[596,688,1660,1686]" captionStart="TABLE 2" captionStartId="9.[151,240,495,519]" captionTargetBox="[151,1436,685,1321]" captionTargetPageId="9" captionText="TABLE 2. Comparison of selected morphometric characters of adult females of some American species of Eucyclops Claus, 1893, including E. cuatrocienegas sp. nov. and E. chihuahuensis sp. nov. CR = caudal ramus; P 4 end 3 = fourth leg endopod, third segment; I = inner terminal spine of P 4 end 3; O = outer terminal spine of P 4 end 3; IS = spine of fifth legs; OS = outer seta of fifth legs; SC = Coverage of serra on external margin of caudal rami. Data from Kiefer (1925), Reid (1985, 1992), Grimaldo-Ortega et al. (1998), Dussart &amp; Defaye (2001), and Suárez-Morales (2004)." httpUri="http://table.plazi.org/id/DF4B664EE948FFD4D5C2FE29C19DFD54" pageId="17" pageNumber="18" tableUuid="DF4B664EE948FFD4D5C2FE29C19DFD54">Table 2</tableCitation>
). There are, however, several subtle differences between these two species. Among the most conspicuous is the structure of the serra on the caudal rami; in
<taxonomicName id="4C344D45E950FFCCD18DF965C0BDF979" box="[1240,1436,1699,1724]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD18DF965C0BDF979" box="[1240,1436,1699,1724]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
it is formed by stout, relatively short spinules arranged in a loose pattern (see
<figureCitation id="130F2A43E950FFCCD169F90FC1A4F926" box="[1084,1157,1737,1763]" captionStart="FIGURE 5" captionStartId="10.[151,258,1910,1934]" captionTargetBox="[215,1309,449,1891]" captionTargetId="figure@10.[215,1371,424,1945]" captionTargetPageId="10" captionText="FIGURE 5. Eucyclops pseudoensifer Dussart, 1984, adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. A) antennule; B) leg 5; C) caudal rami, ventral view; D) same, dorsal view; holotype female, E) right caudal rami, ventral view. E from D. Defayes drawing of the holotype specimen (in litt.). Scale bars A = 50 μm, B = 25 μm, C E = 50 μm." httpUri="https://zenodo.org/record/189734/files/figure.png" pageId="17" pageNumber="18">Figs 5</figureCitation>
C-E; Dussart 1984, fig. 14), whereas the elements in the new species are clearly slender, longer, arranged in a tighter pattern, and more numerous. The outer terminal spiniform caudal seta is clearly shorter in the new species, 0.50 times as long as ramus vs.
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<taxonomicName id="4C344D45E950FFCCD749F8FBC7CDF893" box="[540,748,1853,1878]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD749F8FBC7CDF893" box="[540,748,1853,1878]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
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(see
<figureCitation id="130F2A43E950FFCCD665F8FBC65CF892" box="[816,893,1853,1879]" captionStart="FIGURE 5" captionStartId="10.[151,258,1910,1934]" captionTargetBox="[215,1309,449,1891]" captionTargetId="figure@10.[215,1371,424,1945]" captionTargetPageId="10" captionText="FIGURE 5. Eucyclops pseudoensifer Dussart, 1984, adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. A) antennule; B) leg 5; C) caudal rami, ventral view; D) same, dorsal view; holotype female, E) right caudal rami, ventral view. E from D. Defayes drawing of the holotype specimen (in litt.). Scale bars A = 50 μm, B = 25 μm, C E = 50 μm." httpUri="https://zenodo.org/record/189734/files/figure.png" pageId="17" pageNumber="18">Figs 5</figureCitation>
C-E; Dussart 1984). Also, the length of the antennules differs in both species; they are clearly shorter in
<taxonomicName id="4C344D45E950FFCCD608F8A2C100F8B8" box="[861,1057,1892,1917]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD608F8A2C100F8B8" box="[861,1057,1892,1917]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
</taxonomicName>
(see Dussart 1984 fig. 14), even stretched backwards it barely reaches the middle of the first thoracic somite, whereas in the new species it reaches the posterior margin of the third thoracic somite (
<figureCitation id="130F2A43E950FFCCD663F877C65AF80E" box="[822,891,1969,1995]" captionStart="FIGURE 9" captionStartId="15.[151,258,1890,1914]" captionTargetBox="[246,1319,384,1866]" captionTargetId="figure@15.[224,1367,342,1895]" captionTargetPageId="15" captionText="FIGURE 9. Eucyclops chihuahuensis sp. nov., adult female holotype from Presa Chihuahua, northern Mexico. A) habitus, dorsal view; B) antennule; C) antenna; D) caudal rami and anal somite, ventral view; E) genital double and fifth pedigerous somites, ventral view. Scale bars A = 100 μm, B D = 50 μm." httpUri="https://zenodo.org/record/189738/files/figure.png" pageId="17" pageNumber="18">Fig. 9</figureCitation>
A). The inner basipodal spine of the first leg is shorter in the new species than in
<taxonomicName id="4C344D45E950FFCCD77CF81EC7CCF834" box="[553,749,2008,2033]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E950FFCCD77CF81EC7CCF834" box="[553,749,2008,2033]" italics="true" pageId="17" pageNumber="18">E. pseudoensifer</emphasis>
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; in
<taxonomicName id="4C344D45E950FFCCD649F81EC6C4F834" box="[796,997,2008,2033]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="17" pageNumber="18" phylum="Arthropoda" rank="species" species="chihuahuensis">
<emphasis id="B940EAD4E950FFCCD649F81EC6C4F834" box="[796,997,2008,2033]" italics="true" pageId="17" pageNumber="18">E. chihuahuensis</emphasis>
</taxonomicName>
it barely reaches the distal margin of the second exopodal segment, whereas it stretches to the distal margin of the third segment in
<taxonomicName id="4C344D45E953FFCFD18CFF5EC0BAFF74" box="[1241,1435,152,177]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E953FFCFD18CFF5EC0BAFF74" box="[1241,1435,152,177]" italics="true" pageId="18" pageNumber="19">E. pseudoensifer</emphasis>
</taxonomicName>
(see
<figureCitation id="130F2A43E953FFCFD598FF78C436FF1D" box="[205,279,190,216]" captionStart="FIGURE 6" captionStartId="11.[151,258,1804,1828]" captionTargetBox="[200,1397,196,1764]" captionTargetId="figure@11.[172,1415,158,1780]" captionTargetPageId="11" captionText="FIGURE 6. Eucyclops pseudoensifer Dussart, 1984, adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. A) antenna; B) leg 1; C) leg 2; D) leg 3. Scale bars A D = 50 μm." httpUri="https://zenodo.org/record/189735/files/figure.png" pageId="18" pageNumber="19">Figs 6</figureCitation>
B, 7B; Dussart 1984). The length ratio of the inner/outer spines of the fourth leg endopod differs in these species,
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the new species vs.
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<taxonomicName id="4C344D45E953FFCFD7EFFF23C65FFF3B" box="[698,894,229,254]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E953FFCFD7EFFF23C65FFF3B" box="[698,894,229,254]" italics="true" pageId="18" pageNumber="19">E. pseudoensifer</emphasis>
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(see
<figureCitation id="130F2A43E953FFCFD6EEFF23C125FF3A" box="[955,1028,229,255]" captionStart="FIGURE 7" captionStartId="12.[151,256,1551,1575]" captionTargetBox="[247,1331,190,1550]" captionTargetId="figure@12.[247,1341,148,1554]" captionTargetPageId="12" captionText="FIGURE 7. Eucyclops pseudoensifer Dussart, 1984, A adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. B-D from D. Defayes drawings of the holotype specimen (MNHN-Cp 663) (in litt.). A) leg 4; B) leg 1, coupler and inner margin of coxa and basipod; C) leg 4, ornamentation of coupler; D) leg 3, same. Scale bars A = 50 μm, B D = 25 μm." httpUri="https://zenodo.org/record/189736/files/figure.png" pageId="18" pageNumber="19">Figs 7</figureCitation>
A, 8B). Also different is the length ratio of the inner spine/ third endopodal segment:
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the new species,
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<taxonomicName id="4C344D45E953FFCFD11FFECAC02CFEE0" box="[1098,1293,268,293]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E953FFCFD11FFECAC02CFEE0" box="[1098,1293,268,293]" italics="true" pageId="18" pageNumber="19">E. pseudoensifer</emphasis>
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. In the fifth leg the outer seta is as long as the inner spine in
<taxonomicName id="4C344D45E953FFCFD646FEF4C6CEFE8E" box="[787,1007,306,331]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="chihuahuensis">
<emphasis id="B940EAD4E953FFCFD646FEF4C6CEFE8E" box="[787,1007,306,331]" italics="true" pageId="18" pageNumber="19">E. chihuahuensis</emphasis>
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and it is about 50% shorter in
<taxonomicName id="4C344D45E953FFCFD0D4FEF4C41AFEB7" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E953FFCFD0D4FEF4C41AFEB7" italics="true" pageId="18" pageNumber="19">E. pseudoensifer</emphasis>
</taxonomicName>
(see
<figureCitation id="130F2A43E953FFCFD42EFE9FC4E0FEB6" box="[379,449,345,371]" captionStart="FIGURE 5" captionStartId="10.[151,258,1910,1934]" captionTargetBox="[215,1309,449,1891]" captionTargetId="figure@10.[215,1371,424,1945]" captionTargetPageId="10" captionText="FIGURE 5. Eucyclops pseudoensifer Dussart, 1984, adult female paratype (MNHN- 2547) from Laguna Mucubajì, Venezuela. A) antennule; B) leg 5; C) caudal rami, ventral view; D) same, dorsal view; holotype female, E) right caudal rami, ventral view. E from D. Defayes drawing of the holotype specimen (in litt.). Scale bars A = 50 μm, B = 25 μm, C E = 50 μm." httpUri="https://zenodo.org/record/189734/files/figure.png" pageId="18" pageNumber="19">Fig. 5</figureCitation>
B,
<tableCitation id="C6B6037DE953FFCFD4B0FE9FC71DFEB6" box="[485,572,345,371]" captionStart="TABLE 1" captionStartId="3.[151,240,422,446]" captionTargetBox="[151,1262,518,707]" captionTargetPageId="3" captionText="TABLE 1. Armature of swimming legs 1 4 (spines in Roman numerals, setae in Arabic) of Eucyclops cuatrocienegas sp. nov., E. chihuahuensis sp. nov., and E. pseudoensifer Dussart, 1984. Sequence follows external to internal positions." httpUri="http://table.plazi.org/id/DF4B664EE942FFDED5C2FE60C0BAFE25" pageId="18" pageNumber="19" tableUuid="DF4B664EE942FFDED5C2FE60C0BAFE25">Table 1</tableCitation>
). The body size of these species differs slightly, females:
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in
<taxonomicName id="4C344D45E953FFCFD0D6FE9FC41EFE5C" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="chihuahuensis">
<emphasis id="B940EAD4E953FFCFD0D6FE9FC41EFE5C" italics="true" pageId="18" pageNumber="19">E. chihuahuensis</emphasis>
</taxonomicName>
vs.
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<taxonomicName id="4C344D45E953FFCFD492FE46C7A8FE5C" box="[455,649,384,409]" class="Maxillopoda" family="Cyclopidae" genus="Eucyclops" kingdom="Animalia" order="Cyclopoida" pageId="18" pageNumber="19" phylum="Arthropoda" rank="species" species="pseudoensifer">
<emphasis id="B940EAD4E953FFCFD492FE46C7A8FE5C" box="[455,649,384,409]" italics="true" pageId="18" pageNumber="19">E. pseudoensifer</emphasis>
</taxonomicName>
.
</paragraph>
</subSubSection>
</treatment>
</document>