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<mods:title id="F0733712A7F6FBBABF8CF7FBF2543971">Once upon a time in America: recognition of the species of Libitioides from USA, with comments on other American Cosmetidae (Opiliones, Laniatores)</mods:title>
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<mods:namePart id="BFE395D2E63D06244EA369410144E31C">Kury, Adriano B.</mods:namePart>
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<mods:affiliation id="064568019C283F0A1E0F3E800BABC01F">Departamento de Invertebrados, Museu Nacional / UFRJ, Quinta da Boa Vista, São Cristóvão, 20.940 - 040, Rio de Janeiro, RJ, Brazil.</mods:affiliation>
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<mods:namePart id="A9B4D4E14BD24EB8E01888AB9263E80C">Medrano, Miguel</mods:namePart>
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<mods:affiliation id="0848944802BDCD428985ED84B06EF4FF">Departamento de Invertebrados, Museu Nacional / UFRJ, Quinta da Boa Vista, São Cristóvão, 20.940 - 040, Rio de Janeiro, RJ, Brazil.</mods:affiliation>
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<treatment id="D6710948FFC1FF9DFF35FE17B4BFC09C" ID-DOI="http://doi.org/10.5281/zenodo.8065707" ID-GBIF-Taxon="210356915" ID-Zenodo-Dep="8065707" LSID="urn:lsid:plazi:treatment:D6710948FFC1FF9DFF35FE17B4BFC09C" httpUri="http://treatment.plazi.org/id/D6710948FFC1FF9DFF35FE17B4BFC09C" lastPageId="14" lastPageNumber="115" pageId="12" pageNumber="113">
<subSubSection id="16C2EBD5FFC1FF9FFF35FE17B2ACC38A" box="[189,736,471,498]" pageId="12" pageNumber="113" type="nomenclature">
<paragraph id="5E67B85EFFC1FF9FFF35FE17B2ACC38A" blockId="12.[189,736,471,498]" box="[189,736,471,498]" pageId="12" pageNumber="113">
<heading id="052F0F32FFC1FF9FFF35FE17B2ACC38A" bold="true" box="[189,736,471,498]" fontSize="11" level="3" pageId="12" pageNumber="113" reason="3">
<emphasis id="6CAC644CFFC1FF9FFF35FE17B2ACC38A" bold="true" box="[189,736,471,498]" pageId="12" pageNumber="113">
[11] Diagnostic characters within
<taxonomicName id="99D8C3DDFFC1FF9FFDE9FE17B2ACC38A" ID-CoL="7PMSB" authorityName="Roewer" authorityYear="1912" box="[609,736,471,498]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="12" pageNumber="113" phylum="Arthropoda" rank="genus">
<emphasis id="6CAC644CFFC1FF9FFDE9FE17B2ACC38A" bold="true" box="[609,736,471,498]" italics="true" pageId="12" pageNumber="113">Libitioides</emphasis>
</taxonomicName>
</emphasis>
</heading>
</paragraph>
</subSubSection>
<subSubSection id="16C2EBD5FFC1FF9FFF35FDC6B430C01F" pageId="12" pageNumber="113" type="description">
<paragraph id="5E67B85EFFC1FF9FFF35FDC6B430C01F" blockId="12.[188,1399,518,615]" pageId="12" pageNumber="113">
Because the easy distinction of
<taxonomicName id="99D8C3DDFFC1FF9FFDA5FDC7B2D5C058" baseAuthorityName="Say" baseAuthorityYear="1821" box="[557,665,519,544]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="12" pageNumber="113" phylum="Arthropoda" rank="species" species="ornata">
<emphasis id="6CAC644CFFC1FF9FFDA5FDC7B2D5C058" box="[557,665,519,544]" italics="true" pageId="12" pageNumber="113">L. ornata</emphasis>
</taxonomicName>
from the other
<taxonomicName id="99D8C3DDFFC1FF9FFCC6FDC6B380C058" authorityName="Roewer" authorityYear="1912" box="[846,972,518,544]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="12" pageNumber="113" phylum="Arthropoda" rank="genus">
<emphasis id="6CAC644CFFC1FF9FFCC6FDC6B380C058" box="[846,972,518,544]" italics="true" pageId="12" pageNumber="113">Libitioides</emphasis>
</taxonomicName>
, we have tackled here only the issue of distinction of the western species (morphs B and C:
<taxonomicName id="99D8C3DDFFC1FF9FFCCCFDEAB3DEC03B" baseAuthorityName="Simon" baseAuthorityYear="1879" box="[836,914,554,579]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="12" pageNumber="113" phylum="Arthropoda" rank="species" species="sayi">
<emphasis id="6CAC644CFFC1FF9FFCCCFDEAB3DEC03B" box="[836,914,554,579]" italics="true" pageId="12" pageNumber="113">L. sayi</emphasis>
</taxonomicName>
) from the eastern species (morphs D and E:
<taxonomicName id="99D8C3DDFFC1FF9FFF56FD8DB1CFC01E" authorityName="Kury &amp; Medrano" authorityYear="2023" baseAuthorityName="Sorensen" baseAuthorityYear="1884" box="[222,387,588,614]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="12" pageNumber="113" phylum="Arthropoda" rank="species" species="albolineata">
<emphasis id="6CAC644CFFC1FF9FFF56FD8DB1CFC01E" box="[222,387,588,614]" italics="true" pageId="12" pageNumber="113">L. albolineata</emphasis>
</taxonomicName>
) by listing the main features which can be used for that purpose.
</paragraph>
</subSubSection>
<subSubSection id="16C2EBD5FFC1FF9DFF35FD4EB4BFC09C" lastPageId="14" lastPageNumber="115" pageId="12" pageNumber="113" type="diagnosis">
<paragraph id="5E67B85EFFC1FF9FFF35FD4EB1BEC14D" blockId="12.[189,1398,654,821]" pageId="12" pageNumber="113">
1) Color background of dorsal scutum and legs (
<figureCitation id="C6E3A4DBFFC1FF9FFD7BFD4EB376C0D0" box="[755,826,654,680]" captionStart="Fig" captionStartId="11.[189,232,1962,1988]" captionTargetBox="[254,1331,938,1862]" captionTargetId="figure-200@11.[189,1398,882,1923]" captionTargetPageId="11" captionText="Fig. 7. Southeastern USA, showing the contrasting occurrences of prevailing body color backgrounds in the four morphs B/C/D/E of Libitioides Roewer, 1912." figureDoi="http://doi.org/10.5281/zenodo.8064438" httpUri="https://zenodo.org/record/8064438/files/figure.png" pageId="12" pageNumber="113">Fig. 7</figureCitation>
). This character sharply distinguishes two almost allopatric species: (a) western (morph B, C, but also E): yellow to rusty-orange background, with two fuzzy dark spots on scutal area III; trochanters IIV yellow, gradually getting darker (olive) distally and (b) eastern (morph D): body and legs uniform dark chestnut brown, with only a faint hint of darker spots at area III.
</paragraph>
<caption id="0AA7E8D6FFC1FF9FFF35F869B236C59F" ID-DOI="http://doi.org/10.5281/zenodo.8064440" ID-Zenodo-Dep="8064440" httpUri="https://zenodo.org/record/8064440/files/figure.png" pageId="12" pageNumber="113" startId="12.[189,232,1961,1987]" targetBox="[254,1331,933,1856]" targetPageId="12">
<paragraph id="5E67B85EFFC1FF9FFF35F869B236C59F" blockId="12.[189,1398,1961,2023]" pageId="12" pageNumber="113">
<emphasis id="6CAC644CFFC1FF9FFF35F869B141C5BB" bold="true" box="[189,269,1961,1987]" pageId="12" pageNumber="113">Fig. 8.</emphasis>
Southeastern USA, showing the contrasting conformations of the chevron in the four morphs B/C/D/E of
<taxonomicName id="99D8C3DDFFC1FF9FFEC3F80CB23FC59F" authority="Roewer, 1912" authorityName="Roewer" authorityYear="1912" box="[331,627,1996,2023]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="12" pageNumber="113" phylum="Arthropoda" rank="genus">
<emphasis id="6CAC644CFFC1FF9FFEC3F80CB185C59E" box="[331,457,1996,2022]" italics="true" pageId="12" pageNumber="113">Libitioides</emphasis>
<bibRefCitation id="3A49C5AFFFC1FF9FFE58F80DB23FC59F" author="Roewer C. F." box="[464,627,1997,2023]" pageId="12" pageNumber="113" pagination="1 - 122" refId="ref15846" refString="Roewer C. F. 1912. Die Familie der Cosmetiden der Opiliones-Laniatores. Archiv fur Naturgeschichte Abt. A, Original-Arbeiten 78 (10): 1 - 122." type="journal article" year="1912">Roewer, 1912</bibRefCitation>
</taxonomicName>
.
</paragraph>
</caption>
<paragraph id="5E67B85EFFC0FF9EFF35FEC9B4A4C3F5" blockId="13.[189,1399,264,397]" pageId="13" pageNumber="114">
2) Chevron (
<figureCitation id="C6E3A4DBFFC0FF9EFED4FEC9B1EBC35B" box="[348,423,265,291]" captionStart="Fig" captionStartId="12.[189,232,1961,1987]" captionTargetBox="[254,1331,933,1856]" captionTargetId="figure-226@12.[189,1398,882,1921]" captionTargetPageId="12" captionText="Fig. 8. Southeastern USA, showing the contrasting conformations of the chevron in the four morphs B/C/D/E of Libitioides Roewer, 1912." figureDoi="http://doi.org/10.5281/zenodo.8064440" httpUri="https://zenodo.org/record/8064440/files/figure.png" pageId="13" pageNumber="114">Fig. 8</figureCitation>
). We may distinguish three states of this character: [0] chevron entirely absent, [1] chevron reduced to a small median arch, [2] chevron complete, reaching laterals of carapace. The western species (morphs B, C) mainly lacks chevron or has it reduced (0&gt;&gt; 1), while the eastern species (morphs D, E) mainly has well-developed chevron, sometimes reduced (2&gt;&gt; 1).
</paragraph>
<paragraph id="5E67B85EFFC0FF9EFF35FE74B4F7C023" blockId="13.[189,1400,435,603]" pageId="13" pageNumber="114">
3) Backbone (
<figureCitation id="C6E3A4DBFFC0FF9EFEE2FE74B1F8C3B6" box="[362,436,436,462]" captionStart="Fig" captionStartId="13.[189,232,1963,1989]" captionTargetBox="[254,1331,907,1831]" captionTargetId="figure-206@13.[189,1398,817,1910]" captionTargetPageId="13" captionText="Fig. 9. Southeastern USA, showing the contrasting conformations of the backbone in the four morphs B/C/D/E of Libitioides Roewer, 1912." figureDoi="http://doi.org/10.5281/zenodo.8064442" httpUri="https://zenodo.org/record/8064442/files/figure.png" pageId="13" pageNumber="114">Fig. 9</figureCitation>
). We may distinguish four states of this character: [0] backbone entirely absent, [1] backbone formed by scattered dots, [2] backbone formed by one dash, [3] backbone complete, formed by chained dashes connecting chevron and omega stripe. The western species (
<taxonomicName id="99D8C3DDFFC0FF9EFA91FE3BB520C06C" baseAuthorityName="Simon" baseAuthorityYear="1879" box="[1305,1388,507,532]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="13" pageNumber="114" phylum="Arthropoda" rank="species" species="sayi">
<emphasis id="6CAC644CFFC0FF9EFA91FE3BB520C06C" box="[1305,1388,507,532]" italics="true" pageId="13" pageNumber="114">L. sayi</emphasis>
</taxonomicName>
) always lacks any sort of backbone (only state 0), while the eastern species (
<taxonomicName id="99D8C3DDFFC0FF9EFBD9FDDEB4BAC040" authorityName="Kury &amp; Medrano" authorityYear="2023" baseAuthorityName="Sorensen" baseAuthorityYear="1884" box="[1105,1270,542,568]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="13" pageNumber="114" phylum="Arthropoda" rank="species" species="albolineata">
<emphasis id="6CAC644CFFC0FF9EFBD9FDDEB4BAC040" box="[1105,1270,542,568]" italics="true" pageId="13" pageNumber="114">L. albolineata</emphasis>
</taxonomicName>
) possesses an entire backbone which undergoes all stages of dissociation (1, 2, 3, and rarely 0).
</paragraph>
<paragraph id="5E67B85EFFC0FF9DFF35FD42B178C3AC" blockId="13.[189,1401,642,739]" lastBlockId="14.[226,1401,264,468]" lastPageId="14" lastPageNumber="115" pageId="13" pageNumber="114">
4) Omega stripe (
<figureCitation id="C6E3A4DBFFC0FF9EFE19FD42B1A6C0E4" box="[401,490,642,668]" captionStart="Fig" captionStartId="14.[189,232,1962,1988]" captionTargetBox="[256,1330,908,1829]" captionTargetId="figure-211@14.[191,1397,818,1919]" captionTargetPageId="14" captionText="Fig. 10. Southeastern USA, showing the contrasting conformations of the omega stripe in the four morphs B/C/D/E of Libitioides Roewer, 1912." figureDoi="http://doi.org/10.5281/zenodo.8064444" httpUri="https://zenodo.org/record/8064444/files/figure.png" pageId="13" pageNumber="114">Fig. 10</figureCitation>
). We may distinguish seven states of this character: [0] omega stripe entirely absent (the classical
<taxonomicName id="99D8C3DDFFC0FF9EFE54FD66B247C0C7" baseAuthorityName="Simon" baseAuthorityYear="1879" box="[476,523,678,703]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="13" pageNumber="114" phylum="Arthropoda" rank="species" species="sayi">
<emphasis id="6CAC644CFFC0FF9EFE54FD66B247C0C7" box="[476,523,678,703]" italics="true" pageId="13" pageNumber="114">sayi</emphasis>
</taxonomicName>
facies), [1] omega stripe almost entirely deteriorated, reduced to a single marginal dot, [2] a pair of minute lateral dots, [3] only a pair of tear-shapes dots on posterior margin of area III, sometimes broken in two, [4] a pair or arches almost formed, but each one severed in more than one place, [5] a pair of entire arches, but clearly separated in the middle, [6] omega stripe complete, left and right halves joined in the middle. The western species mostly has no omega stripe and even when present it is rarely complete (states 1 to 4, the more dissociated shapes, correspond to the
<taxonomicName id="99D8C3DDFFC3FF9DFE86FE57B1D9C3C8" baseAuthorityName="Sorensen" baseAuthorityYear="1932" box="[270,405,406,432]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="14" pageNumber="115" phylum="Arthropoda" rank="species" species="depressa">
<emphasis id="6CAC644CFFC3FF9DFE86FE57B1D9C3C8" box="[270,405,406,432]" italics="true" pageId="14" pageNumber="115">L. depressa</emphasis>
</taxonomicName>
morph C) while the eastern species has only the two more complete stages (states 5 and 6).
</paragraph>
<caption id="0AA7E8D6FFC0FF9EFF35F86BB236C591" ID-DOI="http://doi.org/10.5281/zenodo.8064442" ID-Zenodo-Dep="8064442" httpUri="https://zenodo.org/record/8064442/files/figure.png" pageId="13" pageNumber="114" startId="13.[189,232,1963,1989]" targetBox="[254,1331,907,1831]" targetPageId="13">
<paragraph id="5E67B85EFFC0FF9EFF35F86BB236C591" blockId="13.[189,1398,1963,2025]" pageId="13" pageNumber="114">
<emphasis id="6CAC644CFFC0FF9EFF35F86BB140C5BD" bold="true" box="[189,268,1963,1989]" pageId="13" pageNumber="114">Fig. 9.</emphasis>
Southeastern USA, showing the contrasting conformations of the backbone in the four morphs B/C/D/E of
<taxonomicName id="99D8C3DDFFC0FF9EFEC3F80EB23FC590" authority="Roewer, 1912" authorityName="Roewer" authorityYear="1912" box="[331,627,1998,2025]" class="Arachnida" family="Cosmetidae" genus="Libitioides" kingdom="Animalia" order="Opiliones" pageId="13" pageNumber="114" phylum="Arthropoda" rank="genus">
<emphasis id="6CAC644CFFC0FF9EFEC3F80EB185C590" box="[331,457,1998,2024]" italics="true" pageId="13" pageNumber="114">Libitioides</emphasis>
<bibRefCitation id="3A49C5AFFFC0FF9EFE58F80FB23FC590" author="Roewer C. F." box="[464,627,1998,2025]" pageId="13" pageNumber="114" pagination="1 - 122" refId="ref15846" refString="Roewer C. F. 1912. Die Familie der Cosmetiden der Opiliones-Laniatores. Archiv fur Naturgeschichte Abt. A, Original-Arbeiten 78 (10): 1 - 122." type="journal article" year="1912">Roewer, 1912</bibRefCitation>
</taxonomicName>
.
</paragraph>
</caption>
<paragraph id="5E67B85EFFC3FF9DFF35FE3AB32AC007" blockId="14.[189,1399,506,639]" pageId="14" pageNumber="115">
5) Ribs (
<figureCitation id="C6E3A4DBFFC3FF9DFEA4FE3AB1CAC06D" box="[300,390,506,533]" captionStart="Fig" captionStartId="15.[189,232,1343,1369]" captionTargetBox="[254,1331,317,1240]" captionTargetId="figure-81@15.[189,1398,262,1305]" captionTargetPageId="15" captionText="Fig. 11. Southeastern USA, showing the contrasting conformations of the ribs in the four morphs B/C/ D/E of Libitioides Roewer, 1912." figureDoi="http://doi.org/10.5281/zenodo.8064446" httpUri="https://zenodo.org/record/8064446/files/figure.png" pageId="14" pageNumber="115">Fig. 11</figureCitation>
). We may distinguish three states of this character: [1] ribs absent, [2] ribs poorly defined, formed by a few dots on groove I, [3] ribs more well-formed by dashed lines on grooves I and II. The western species (morphs B, C) entirely lacks ribs while the eastern species (morphs D, E) has all degrees of dissociation from entire ribs to none.
</paragraph>
<paragraph id="5E67B85EFFC3FF9DFF35FD65B4BFC09C" blockId="14.[189,1398,677,740]" pageId="14" pageNumber="115">6) Markings on lateral areas. This character is exclusively present in the eastern species (morphs D, E) and it is very variable, from absent in both sides to present in a single side (asymmetric).</paragraph>
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</treatment>
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