213 lines
27 KiB
XML
213 lines
27 KiB
XML
<document ID-DOI="10.1126/sciadv.abj5689" ID-GBIF-Dataset="358054e6-cd87-43e4-b7e5-8a5a595491ca" ID-PMC="PMC8528423" ID-PubMed="34669480" ID-Zenodo-Dep="5598194" checkinTime="1635195786545" checkinUser="carolina" docAuthor="Luque, Javier, Xing, Lida, Briggs, Derek E. G., Clark, Elizabeth G., Duque, Alex, Hui, Junbo, Mai, Huijuan & McKellar, Ryan C." docDate="2021" docId="03BF09725274FFDF2E4413CFFD3EF8CB" docLanguage="en" docName="SciAdv.7.abj5689.pdf" docOrigin="Science Advances 7" docTitle="Cretapsaridae Luque 2021, fam. nov" docType="treatment" docVersion="8" lastPageNumber="2" masterDocId="FF86710A5274FFDE2D0C1559FFD8FFCE" masterDocTitle="Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous" masterLastPageNumber="13" masterPageNumber="1" pageNumber="1" updateTime="1668144158605" updateUser="ExternalLinkService" zenodo-license-document="CC-BY-4.0" zenodo-license-figures="CC-BY-4.0">
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<mods:mods xmlns:mods="http://www.loc.gov/mods/v3">
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<mods:titleInfo>
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<mods:title>Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous</mods:title>
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</mods:titleInfo>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Luque, Javier</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Xing, Lida</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Briggs, Derek E. G.</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Clark, Elizabeth G.</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Duque, Alex</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Hui, Junbo</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>Mai, Huijuan</mods:namePart>
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</mods:name>
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<mods:name type="personal">
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<mods:role>
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<mods:roleTerm>Author</mods:roleTerm>
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</mods:role>
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<mods:namePart>McKellar, Ryan C.</mods:namePart>
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</mods:name>
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<mods:typeOfResource>text</mods:typeOfResource>
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<mods:relatedItem type="host">
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<mods:titleInfo>
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<mods:title>Science Advances</mods:title>
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</mods:titleInfo>
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<mods:part>
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<mods:date>2021</mods:date>
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<mods:detail type="pubDate">
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<mods:number>2021-10-20</mods:number>
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</mods:detail>
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<mods:detail type="volume">
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<mods:number>7</mods:number>
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</mods:detail>
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<mods:extent unit="page">
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<mods:start>1</mods:start>
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<mods:end>13</mods:end>
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</mods:extent>
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</mods:part>
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<mods:classification>journal article</mods:classification>
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<mods:identifier type="DOI">10.1126/sciadv.abj5689</mods:identifier>
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<mods:identifier type="GBIF-Dataset">358054e6-cd87-43e4-b7e5-8a5a595491ca</mods:identifier>
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<mods:identifier type="PubMed">34669480</mods:identifier>
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<treatment ID-DOI="http://doi.org/10.5281/zenodo.5598169" ID-GBIF-Taxon="189372860" ID-Zenodo-Dep="5598169" LSID="urn:lsid:zoobank.org:act:81705335-CAED-400E-B1EC-161B56B298AE" httpUri="http://treatment.plazi.org/id/03BF09725274FFDF2E4413CFFD3EF8CB" lastPageId="1" lastPageNumber="2" pageId="0" pageNumber="1">
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<subSubSection box="[840,1159,1686,1710]" pageId="0" pageNumber="1" type="nomenclature">
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<paragraph blockId="0.[808,1489,1510,1886]" box="[840,1159,1686,1710]" pageId="0" pageNumber="1">
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<taxonomicName authority="Luque, 2021" authorityName="Luque " authorityYear="2021" box="[840,1154,1686,1710]" family="Cretapsaridae" higherTaxonomySource="Manual Input" kingdom="Animalia" order="Decapoda" pageId="0" pageNumber="1" rank="family" status="fam. nov.">
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Cretapsaridae Luque,
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<taxonomicNameLabel box="[1063,1154,1686,1710]" pageId="0" pageNumber="1" rank="family">fam. nov</taxonomicNameLabel>
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</taxonomicName>
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.
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</paragraph>
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</subSubSection>
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<subSubSection pageId="0" pageNumber="1" type="description">
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<paragraph blockId="0.[808,1489,1510,1886]" pageId="0" pageNumber="1">LSID. Family group: http://zoobank.org/urn:lsid:zoobank. org:act:81705335-CAED-400E-B1EC-161B56B298AE.</paragraph>
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</subSubSection>
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<paragraph blockId="0.[96,778,1408,1862]" pageId="0" pageNumber="1">*Corresponding author. Email: jluque@fas.harvard.edu, luque@ualberta.ca (J.L.); xinglida@gmail.com (L.X.)</paragraph>
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<subSubSection box="[840,1445,1774,1798]" pageId="0" pageNumber="1" type="discussion">
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<paragraph blockId="0.[808,1489,1510,1886]" box="[840,1445,1774,1798]" pageId="0" pageNumber="1">
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Included genus:
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<taxonomicName authority="Luque" authorityName="Luque" authorityYear="2021" box="[1007,1189,1774,1797]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="genus" status="gen. nov.">
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<emphasis box="[1007,1118,1774,1797]" italics="true" pageId="0" pageNumber="1">Cretapsara</emphasis>
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Luque
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</taxonomicName>
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,
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<taxonomicNameLabel box="[1199,1294,1774,1798]" pageId="0" pageNumber="1" rank="genus">gen. nov.</taxonomicNameLabel>
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, by monotypy.
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</paragraph>
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</subSubSection>
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<subSubSection box="[840,1256,1803,1828]" pageId="0" pageNumber="1" type="diagnosis">
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<paragraph blockId="0.[808,1489,1510,1886]" box="[840,1256,1803,1828]" pageId="0" pageNumber="1">Diagnosis: As for type genus and species.</paragraph>
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</subSubSection>
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<paragraph blockId="0.[96,778,1408,1862]" box="[96,500,1819,1839]" pageId="0" pageNumber="1">†These authors contributed equally to this work.</paragraph>
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<paragraph blockId="0.[96,778,1408,1862]" box="[96,776,1842,1862]" pageId="0" pageNumber="1">‡Present address: Florida International University, Biscayne Bay Campus, 3000 NE</paragraph>
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<subSubSection lastPageId="1" lastPageNumber="2" pageId="0" pageNumber="1" type="discussion">
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<paragraph blockId="0.[808,1489,1510,1886]" lastBlockId="1.[96,777,981,1885]" lastPageId="1" lastPageNumber="2" pageId="0" pageNumber="1">
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Remarks:
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<taxonomicName authority="Luque & Xing & Briggs & Clark & Duque & Hui & Mai & McKellar, 2021" authorityName="Luque & Xing & Briggs & Clark & Duque & Hui & Mai & McKellar" authorityYear="2021" box="[936,1134,1832,1856]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="0" pageNumber="1" phylum="Arthropoda" rank="species" species="athanata" status="n. gen. et sp.">
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<emphasis box="[936,1134,1832,1856]" italics="true" pageId="0" pageNumber="1">Cretapsara athanata</emphasis>
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</taxonomicName>
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<taxonomicNameLabel box="[1139,1256,1833,1857]" pageId="0" pageNumber="1" rank="species">n. gen. etsp.</taxonomicNameLabel>
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differsfromanyknown crab family in its combination of plesiomorphic and apomorphic characters. Superficially, itsharessomeresemblancetosomemarineeubrachyuranfamiliessuch as Eogeryonidae, fromthe Upper Cretaceous of Spain [
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<taxonomicName authority=", Cenomanian" authorityName=", Cenomanian" box="[194,523,1040,1064]" class="Malacostraca" family="Trichodactylidae" genus="Eogeryon" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="species" species="elegius">
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<emphasis box="[194,370,1040,1064]" italics="true" pageId="1" pageNumber="2">Eogeryon elegius</emphasis>
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, Cenomanian
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</taxonomicName>
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(
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<bibRefCitation author="A. Osso" box="[539,564,1040,1064]" journalOrPublisher="Bol. Soc. Geol. Mex." pageId="1" pageNumber="2" pagination="231 - 246" part="68" refId="ref10812" refString="14. A. Osso, Eogeryon elegius n. gen. and n. sp. (Decapoda: Eubrachyura: Portunoidea), one of the oldest modern crabs from late Cenomanian of the Iberian Peninsula. Bol. Soc. Geol. Mex. 68, 231 - 246 (2016)." title="Eogeryon elegius n. gen. and n. sp. (Decapoda: Eubrachyura: Portunoidea), one of the oldest modern crabs from late Cenomanian of the Iberian Peninsula" type="journal article" year="2016">
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<emphasis box="[539,564,1040,1064]" italics="true" pageId="1" pageNumber="2">14</emphasis>
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</bibRefCitation>
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)] (
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<figureCitation box="[598,680,1040,1064]" captionStart="Fig" captionStartId="5.[96,124,1337,1357]" captionTargetBox="[103,1480,164,1297]" captionTargetId="graphics-232@5.[102,1077,169,1280]" captionTargetPageId="5" captionText="Fig.5.Phylogenetic relationships of Cretapsaraathanata Luque,gen.et sp.nov.inthe crab treeof life. Bayesian majority-rule consensus topology of thepost–burn-in sample of trees for key fossil and extant eubrachyuran families,including probability support values indicated at branches.Branches with posterior probability support <75% are collapsed. Thick solid lines represent the ages of the known first and last occurrences of the studied families. Dotted lines and daggers (†) indicate extinct taxa;solid lines indicate living taxa. Photos: Heikeopsis japonica (A) by T.-Y. Chan; Telamonocarcinus gambalatus (B), M. pasinii (E), and E. elegius (H) by À. Ossó; Archaeochiapasa mardoqueoi (C) by F. Vega; Componocancer robertsi (D) by R.Feldmann and C.Schweitzer; Dilocarcinus septemdentatus (G) and Melothelphusa dardanelosensis (M) by Senckenberg Museum,S.Tränkner,courtesy of C.Magalhães [(M) after (80)]; Cretapsaraathanata Luque gen.et sp.nov.(F)herein;C.maenas (I),C.sapidus(K),Geothelphusa olea (O),Sayamia melanodactylus (P),Geosesarma dennerle (R),and C.guanhumi (S) by O.Radosta;G.trispinosus (J) by C.Noever (CC BY 4.0,https://commons.wikimedia.org/w/ index.php?curid=63236719); Dinocarcinus velauciensis (L) by N. Robin;Potamonauteskunduno (N) by P. Crabb (CC BY 3.0,https://commons.wikimedia.org/w/index.php?curid=29254322);G.cruentata (Q) by A.Anker;and Leptuca oerdesti (T) by J.L. Figure by J.L." figureDoi="http://doi.org/10.5281/zenodo.5598204" httpUri="https://zenodo.org/record/5598204/files/figure.png" pageId="1" pageNumber="2">Fig. 5H</figureCitation>
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) and the Lower Cretaceousof Brazil [
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<emphasis box="[366,597,1069,1093]" italics="true" pageId="1" pageNumber="2">Romualdocarcinus salesi</emphasis>
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, Albian (
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<bibRefCitation author="L. A. C. Prado & J. Luque & A. M. F. Barreto & A. R. Palmer" box="[685,709,1069,1093]" journalOrPublisher="Acta Palaeontol. Pol." pageId="1" pageNumber="2" pagination="737 - 750" part="63" refId="ref10868" refString="15. L. A. C. Prado, J. Luque, A. M. F. Barreto, A. R. Palmer, New brachyuran crabs from the Aptian - Albian Romualdo Formation, Santana Group of Brazil: Evidence for a Tethyan connection to the Araripe Basin. Acta Palaeontol. Pol. 63, 737 - 750 (2018)." title="New brachyuran crabs from the Aptian - Albian Romualdo Formation, Santana Group of Brazil: Evidence for a Tethyan connection to the Araripe Basin" type="journal article" year="2018">
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<emphasis box="[685,709,1069,1093]" italics="true" pageId="1" pageNumber="2">15</emphasis>
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</bibRefCitation>
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)], and
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<taxonomicName box="[96,248,1098,1122]" class="Malacostraca" family="Marocarcinidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="family">Marocarcinidae</taxonomicName>
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, fromthe Upper Cretaceousof Morocco [
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<taxonomicName authority=", Cenomanian" authorityName=", Cenomanian" class="Malacostraca" family="Marocarcinidae" genus="Marocarcinus" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="species" species="pasinii">
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<emphasis italics="true" pageId="1" pageNumber="2">Marocarcinus pasinii</emphasis>
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, Cenomanian
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</taxonomicName>
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(
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<bibRefCitation author="D. Guinot & A. De Angeli & A. Garassino" box="[322,346,1128,1152]" journalOrPublisher="Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano" pageId="1" pageNumber="2" pagination="25 - 36" part="149" refId="ref10936" refString="16. D. Guinot, A. De Angeli, A. Garassino, Marocarcinidae, a new eubrachyuran family, and Marocarcinus pasinii n. gen., n. sp. from the Upper Cretaceous (Cenomanian- Turonian) of Gara Sbaa, southeastern Morocco (Crustacea, Decapoda, Brachyura). Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano 149, 25 - 36 (2008)." title="Marocarcinidae, a new eubrachyuran family, and Marocarcinus pasinii n. gen., n. sp. from the Upper Cretaceous (Cenomanian- Turonian) of Gara Sbaa, southeastern Morocco (Crustacea, Decapoda, Brachyura)" type="journal article" year="2008">
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<emphasis box="[322,346,1128,1152]" italics="true" pageId="1" pageNumber="2">16</emphasis>
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</bibRefCitation>
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)] (
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<figureCitation box="[377,453,1128,1152]" captionStart="Fig" captionStartId="5.[96,124,1337,1357]" captionTargetBox="[103,1480,164,1297]" captionTargetId="graphics-232@5.[102,1077,169,1280]" captionTargetPageId="5" captionText="Fig.5.Phylogenetic relationships of Cretapsaraathanata Luque,gen.et sp.nov.inthe crab treeof life. Bayesian majority-rule consensus topology of thepost–burn-in sample of trees for key fossil and extant eubrachyuran families,including probability support values indicated at branches.Branches with posterior probability support <75% are collapsed. Thick solid lines represent the ages of the known first and last occurrences of the studied families. Dotted lines and daggers (†) indicate extinct taxa;solid lines indicate living taxa. Photos: Heikeopsis japonica (A) by T.-Y. Chan; Telamonocarcinus gambalatus (B), M. pasinii (E), and E. elegius (H) by À. Ossó; Archaeochiapasa mardoqueoi (C) by F. Vega; Componocancer robertsi (D) by R.Feldmann and C.Schweitzer; Dilocarcinus septemdentatus (G) and Melothelphusa dardanelosensis (M) by Senckenberg Museum,S.Tränkner,courtesy of C.Magalhães [(M) after (80)]; Cretapsaraathanata Luque gen.et sp.nov.(F)herein;C.maenas (I),C.sapidus(K),Geothelphusa olea (O),Sayamia melanodactylus (P),Geosesarma dennerle (R),and C.guanhumi (S) by O.Radosta;G.trispinosus (J) by C.Noever (CC BY 4.0,https://commons.wikimedia.org/w/ index.php?curid=63236719); Dinocarcinus velauciensis (L) by N. Robin;Potamonauteskunduno (N) by P. Crabb (CC BY 3.0,https://commons.wikimedia.org/w/index.php?curid=29254322);G.cruentata (Q) by A.Anker;and Leptuca oerdesti (T) by J.L. Figure by J.L." figureDoi="http://doi.org/10.5281/zenodo.5598204" httpUri="https://zenodo.org/record/5598204/files/figure.png" pageId="1" pageNumber="2">Fig. 5E</figureCitation>
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).
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<taxonomicName authorityName="Luque" authorityYear="2021" box="[470,587,1128,1151]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="genus">
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<emphasis box="[470,587,1128,1151]" italics="true" pageId="1" pageNumber="2">Cretapsara</emphasis>
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</taxonomicName>
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differs from Eogeryonidae and
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<taxonomicName box="[253,410,1157,1181]" class="Malacostraca" family="Marocarcinidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="family">Marocarcinidae</taxonomicName>
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in the presenceof a bilobate rostrum and lack of orbital fissures, compared to the bifid and acute rostrum and twowell-developedorbitalfissuresdiagnostic of thesetwofamilies [
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<taxonomicName box="[101,261,1245,1269]" class="Malacostraca" family="Marocarcinidae" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="family">Marocarcinidae</taxonomicName>
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was initially interpretedas havingnoorbitalfissures due to the erroneous interpretation of the eyestalks as part of the orbit (
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<bibRefCitation author="D. Guinot & A. De Angeli & A. Garassino" box="[161,185,1304,1328]" journalOrPublisher="Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano" pageId="1" pageNumber="2" pagination="25 - 36" part="149" refId="ref10936" refString="16. D. Guinot, A. De Angeli, A. Garassino, Marocarcinidae, a new eubrachyuran family, and Marocarcinus pasinii n. gen., n. sp. from the Upper Cretaceous (Cenomanian- Turonian) of Gara Sbaa, southeastern Morocco (Crustacea, Decapoda, Brachyura). Atti Soc. it. Sci. nat. Museo civ. Stor. nat. Milano 149, 25 - 36 (2008)." title="Marocarcinidae, a new eubrachyuran family, and Marocarcinus pasinii n. gen., n. sp. from the Upper Cretaceous (Cenomanian- Turonian) of Gara Sbaa, southeastern Morocco (Crustacea, Decapoda, Brachyura)" type="journal article" year="2008">
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<emphasis box="[161,185,1304,1328]" italics="true" pageId="1" pageNumber="2">16</emphasis>
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</bibRefCitation>
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) but is here recognized as having two orbital fissures and scored as such in our analysis].
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</paragraph>
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<caption ID-DOI="http://doi.org/10.5281/zenodo.5598196" ID-Zenodo-Dep="5598196" httpUri="https://zenodo.org/record/5598196/files/figure.png" pageId="1" pageNumber="2" startId="1.[96,126,850,870]" targetBox="[315,1269,164,822]" targetPageId="1">
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<paragraph blockId="1.[96,1488,848,922]" pageId="1" pageNumber="2">
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<emphasis bold="true" box="[96,1052,848,870]" pageId="1" pageNumber="2">
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Fig. 1.
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<taxonomicName authority="Luque" authorityName="Luque & Xing & Briggs & Clark & Duque & Hui & Mai & McKellar" authorityYear="2021" box="[154,396,848,870]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="species" species="athanata" status="gen. et sp. nov.">
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<emphasis bold="true" box="[154,336,848,868]" italics="true" pageId="1" pageNumber="2">Cretapsara athanata</emphasis>
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Luque
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</taxonomicName>
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<taxonomicNameLabel box="[400,538,850,870]" pageId="1" pageNumber="2" rank="species">gen. et sp. nov.</taxonomicNameLabel>
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, a modern-looking eubrachyuran crab in Burmese amber.
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</emphasis>
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(
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<emphasis bold="true" box="[1062,1075,850,870]" pageId="1" pageNumber="2">A</emphasis>
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to
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<emphasis bold="true" box="[1102,1116,850,870]" pageId="1" pageNumber="2">D</emphasis>
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) Holotype LYAM-9. (A) Whole amber sample with crab inclusion in ventral view. (B) Close-up of ventral carapace. (C) Whole amber sample with crab inclusion in dorsal view. (D) Close-up of dorsal carapace. White arrows in (B) and (D) indicate the detached left fifth leg orpereopod.Photos by L.X.Figure by J.L.
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</paragraph>
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</caption>
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<paragraph blockId="1.[96,777,981,1885]" pageId="1" pageNumber="2">
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The overall carapace outline, the broad front, long legs, and the lack of orbital fissures that characterize
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<taxonomicName authorityName="Luque & Xing & Briggs & Clark & Duque & Hui & Mai & McKellar" authorityYear="2021" box="[502,623,1392,1416]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="species" species="athanata">
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<emphasis box="[502,623,1392,1416]" italics="true" pageId="1" pageNumber="2">C. athanata</emphasis>
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</taxonomicName>
|
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(
|
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<figureCitation box="[636,703,1392,1416]" captionStart="Fig" captionStartId="1.[96,126,850,870]" captionTargetBox="[315,1269,164,822]" captionTargetId="figure-684@1.[311,1269,164,822]" captionTargetPageId="1" captionText="Fig. 1. Cretapsara athanata Luque gen. et sp. nov., a modern-looking eubrachyuran crab in Burmese amber. (A to D) Holotype LYAM-9. (A) Whole amber sample with crab inclusion in ventral view. (B) Close-up of ventral carapace. (C) Whole amber sample with crab inclusion in dorsal view. (D) Close-up of dorsal carapace. White arrows in (B) and (D) indicate the detached left fifth leg or pereopod.Photos by L.X.Figure by J.L." figureDoi="http://doi.org/10.5281/zenodo.5598196" httpUri="https://zenodo.org/record/5598196/files/figure.png" pageId="1" pageNumber="2">Figs. 1</figureCitation>
|
||
and
|
||
<figureCitation box="[755,768,1392,1416]" captionStart="Fig" captionStartId="2.[96,125,1220,1240]" captionTargetBox="[316,1269,164,1190]" captionTargetId="figure-477@2.[697,793,630,724]" captionTargetPageId="2" captionText="Fig. 2. Cretapsara athanata Luque gen. et sp.nov. from Burmese amber. (A to G) Detailed views of Holotype LYAM-9.(A) Close-up of antero-ventral carapace with eyes and eyestalks, antennae, and the excurrent openings beside the palps of the third maxillipeds (mxp3).(B) Close-up of dorsal carapace showing the orbits lacking orbital fissures and the anterolateral margin with three spines including the outer orbital spine. (C) Overview of specimen in ventral view with legs,pleon,sternum,mouthparts, eyes,and left cheliped.(D) Close-up of left cheliped in ventral oblique view,showing a straight dactylus and pollex,the latter bearing small acute teeth on occlusal margin. (E) Ventral view of pereopods 2 to 5, showing all legs of similar size and slender shape, with small, thin,spaced setae,and an acute,long dactyli.(F) Close-up of the mxp3, showing the palp and the fine lining of setae in the occlusal margin, the two hollow openings beside the palp of mxp3 (white arrow), and small granulations in the pterygostome. (G) Close-up of posterior sternites and pleon tucked under the carapace, typical of a eubrachyuran. White arrows in (A) and (F) indicate the excurrent openings. an1,antennula; an2,antenna; ce,corneal eye;es,eyestalk; ex,exopod; is, ischium; me,merus; pa:distal palp of mxp3. Photos by L.X.Figure by J.L." figureDoi="http://doi.org/10.5281/zenodo.5598198" httpUri="https://zenodo.org/record/5598198/files/figure.png" pageId="1" pageNumber="2">2</figureCitation>
|
||
) resemble those of some modern Grapsoidea—a group of highly terrestrial thoracotreme crabscommon in subtidal and supratidal settings worldwide. Despite this,
|
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<taxonomicName authorityName="Luque & Xing & Briggs & Clark & Duque & Hui & Mai & McKellar" authorityYear="2021" box="[351,472,1480,1504]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="species" species="athanata">
|
||
<emphasis box="[351,472,1480,1504]" italics="true" pageId="1" pageNumber="2">C. athanata</emphasis>
|
||
</taxonomicName>
|
||
differs from grapsoids in important respects. In mostgrapsoids, thereisaconspicuous V-shaped notchbetweenthemerus andischium of thethirdmaxillipeds (mxp3), sothat themandiblesare visible througha large, rhomboidal gapwhen the mxp3 are closed, a featureabsent in
|
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<taxonomicName authorityName="Luque" authorityYear="2021" box="[493,604,1598,1621]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="genus">
|
||
<emphasis box="[493,604,1598,1621]" italics="true" pageId="1" pageNumber="2">Cretapsara</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<figureCitation box="[616,683,1597,1621]" captionStart="Fig" captionStartId="2.[96,125,1220,1240]" captionTargetBox="[316,1269,164,1190]" captionTargetId="figure-477@2.[697,793,630,724]" captionTargetPageId="2" captionText="Fig. 2. Cretapsara athanata Luque gen. et sp.nov. from Burmese amber. (A to G) Detailed views of Holotype LYAM-9.(A) Close-up of antero-ventral carapace with eyes and eyestalks, antennae, and the excurrent openings beside the palps of the third maxillipeds (mxp3).(B) Close-up of dorsal carapace showing the orbits lacking orbital fissures and the anterolateral margin with three spines including the outer orbital spine. (C) Overview of specimen in ventral view with legs,pleon,sternum,mouthparts, eyes,and left cheliped.(D) Close-up of left cheliped in ventral oblique view,showing a straight dactylus and pollex,the latter bearing small acute teeth on occlusal margin. (E) Ventral view of pereopods 2 to 5, showing all legs of similar size and slender shape, with small, thin,spaced setae,and an acute,long dactyli.(F) Close-up of the mxp3, showing the palp and the fine lining of setae in the occlusal margin, the two hollow openings beside the palp of mxp3 (white arrow), and small granulations in the pterygostome. (G) Close-up of posterior sternites and pleon tucked under the carapace, typical of a eubrachyuran. White arrows in (A) and (F) indicate the excurrent openings. an1,antennula; an2,antenna; ce,corneal eye;es,eyestalk; ex,exopod; is, ischium; me,merus; pa:distal palp of mxp3. Photos by L.X.Figure by J.L." figureDoi="http://doi.org/10.5281/zenodo.5598198" httpUri="https://zenodo.org/record/5598198/files/figure.png" pageId="1" pageNumber="2">Figs. 2</figureCitation>
|
||
, Cand F, and 3, B, E, and G). Moreover, the podomeres of the walking legs in grapsoids, as in most thoracotreme crabs, are subtriangular to flattened in cross section, whereas those in
|
||
<taxonomicName authorityName="Luque" authorityYear="2021" box="[450,563,1686,1709]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="genus">
|
||
<emphasis box="[450,563,1686,1709]" italics="true" pageId="1" pageNumber="2">Cretapsara</emphasis>
|
||
</taxonomicName>
|
||
are circular in cross sectionandmoresimilartothoseofotherheterotremes (
|
||
<figureCitation box="[618,671,1714,1739]" captionStart="Fig" captionStartId="3.[96,126,1249,1269]" captionTargetBox="[316,1270,163,1224]" captionTargetId="figure-309@3.[315,1270,163,1224]" captionTargetPageId="3" captionText="Fig. 3. 3D mesh of Cretapsara athanata Luque gen. et sp. nov. holotype LYAM-9. (A to E) 3D mesh extracted from reconstructed micro-CT data in VGSTUDIO MAX, remeshed in MeshLab, and visualized using Autodesk Maya: (A) dorsal, (B) ventral, (C) right lateral,(D) oblique postero-dorsal,(E) oblique antero-ventral views,showing the claws of equal size and four pairs of slender legs similar in shape and size,with P5 slightly smaller than the other legs.(F and G) Details of the dorsal (F) and ventral (G) carapace,showing details of the large eyes and orbits,small antennae,and a small,acute outer orbital spine [(F) thick arrow],two small anterolateral spines (F,thin arrows), a posterolateral margin bearing at least four small and equidistant tubercles (F,small arrows),straight posterior margin,slender coxae of the pereopods,a typical heterotreme eubrachyuran sternum (G),and a reduced and folded pleon with the first pleonites dorsally exposed.Left fifth pereopod digitally reattached.bcg,branchiocardiac groove; ca,carpus;cg, cervical groove;cx,coxa;da,dactylus;ib,ischiobasis;ma,manus or palm of claw;P1,claws or chelipeds;P2 to P5,pereopods or walking legs 2 to 5; po,pollex or fixed finger cheliped propodus; pr,propodus.Images by E.G.C. Figure by J.L." figureDoi="http://doi.org/10.5281/zenodo.5598200" httpUri="https://zenodo.org/record/5598200/files/figure.png" pageId="1" pageNumber="2">Fig.3</figureCitation>
|
||
,movieS1, and data file S1). Such similarities between
|
||
<taxonomicName authorityName="Luque" authorityYear="2021" box="[556,667,1744,1767]" class="Malacostraca" genus="Cretapsara" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="1" pageNumber="2" phylum="Arthropoda" rank="genus">
|
||
<emphasis box="[556,667,1744,1767]" italics="true" pageId="1" pageNumber="2">Cretapsara</emphasis>
|
||
</taxonomicName>
|
||
and some grapsoids are likely convergent adaptations to similar ecologies.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |