339 lines
49 KiB
XML
339 lines
49 KiB
XML
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<mods:title id="342FA520DAFC0D79CCBBE7310BE96355">Review of the enigmatic ‘ shark’, Platyacrodus unicus Ameghino, 1935, from the Paleocene of Patagonia, Argentina: a history of palaeontologists, sharks and crabs</mods:title>
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<mods:namePart id="99ECA9B417C04D0E3BA4F847371A2B0A">Agnolin, Federico</mods:namePart>
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<mods:namePart id="A3544F7519A054EA992DAAF059E332BC">Ezcurra, Martín D.</mods:namePart>
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<treatment id="038B878DFFBB141DFF11FC0CFCC306F1" ID-GBIF-Taxon="158852386" LSID="urn:lsid:plazi:treatment:038B878DFFBB141DFF11FC0CFCC306F1" httpUri="http://treatment.plazi.org/id/038B878DFFBB141DFF11FC0CFCC306F1" lastPageId="5" lastPageNumber="298" pageId="2" pageNumber="295">
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<subSubSection id="C3386510FFBB141AFF11FC0CFDEE0504" box="[151,587,1016,1043]" pageId="2" pageNumber="295" type="nomenclature">
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<paragraph id="8B9D369BFFBB141AFF11FC0CFDEE0504" blockId="2.[151,587,1016,1079]" box="[151,587,1016,1043]" pageId="2" pageNumber="295">
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<heading id="D0D581F7FFBB141AFF11FC0CFDEE0504" bold="true" box="[151,587,1016,1043]" fontSize="11" level="1" pageId="2" pageNumber="295" reason="1">
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<taxonomicName id="4C224D18FFBB141AFF11FC0CFDEE0504" authority="Ameghino, 1935" authorityName="Ameghino" authorityYear="1935" box="[151,587,1016,1043]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="2" pageNumber="295" phylum="Chordata" rank="species" species="unicus">
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<emphasis id="B956EA89FFBB141AFF11FC0CFDEE0504" bold="true" box="[151,587,1016,1043]" pageId="2" pageNumber="295">
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<emphasis id="B956EA89FFBB141AFF11FC0CFE260504" bold="true" box="[151,387,1016,1043]" italics="true" pageId="2" pageNumber="295">Platyacrodus unicus</emphasis>
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<bibRefCitation id="EFB34B6AFFBB141AFE0CFC0CFDEE0504" author="Ameghino, F." box="[394,587,1016,1043]" pageId="2" pageNumber="295" pagination="619 - 647" refId="ref3162" refString="Ameghino, F. (1935) Nuevas especies de selaceos terciario cretaceos de Patagonia. In: Torcelli, J. (Ed.), Obras Completas y Correspondencia Cientifica de Florentino Ameghino. Buenos Aires, pp. 619 - 647." type="book chapter" year="1935">Ameghino, 1935</bibRefCitation>
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</emphasis>
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</taxonomicName>
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</heading>
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</paragraph>
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<subSubSection id="C3386510FFBB141AFF11FBE9FE830520" box="[151,294,1053,1079]" pageId="2" pageNumber="295" type="description">
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<paragraph id="8B9D369BFFBB141AFF11FBE9FE830520" blockId="2.[151,587,1016,1079]" box="[151,294,1053,1079]" pageId="2" pageNumber="295">
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(
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<figureCitation id="13192A1EFFBB141AFF19FBE9FF4A0520" box="[159,239,1053,1079]" captionStart="FIGURE 2" captionStartId="3.[151,250,1120,1145]" captionTargetBox="[345,1236,621,1077]" captionTargetId="figure@3.[340,1247,611,1095]" captionTargetPageId="3" captionText="FIGURE 2. A–D, Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian) in A, dorsal, B, ventral, C, posterior, and D, right lateral views. E, Label handwritten by Florentino Ameghino associated to MACN-A 12701. Abbreviations: ar, anterior ridge; cg, cervical groove; cr, cardiac region; lf, lateral flank; mgr, metagastric region; mr, median ridge; no, notch; pr, posterior ridge. Scale bar equals 5 mm." httpUri="https://zenodo.org/record/3349477/files/figure.png" pageId="2" pageNumber="295">Figs. 2</figureCitation>
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,
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<figureCitation id="13192A1EFFBB141AFF7DFBE9FEBB0520" box="[251,286,1053,1079]" captionStart="FIGURE 3" captionStartId="3.[151,250,1633,1658]" captionTargetBox="[355,1236,1321,1603]" captionTargetId="figure@3.[340,1247,1311,1609]" captionTargetPageId="3" captionText="FIGURE 3. A, Photograph of Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian). B, Photograph and C, interpretative drawing of the retroplumid crab Costacopluma salamanca (holotype, Colección de Paleontología de la Facultad de Ciencias Exactas y Naturales de la Universidad de Buenos Aires 17376). Not to scale. B and C, modified from Feldmann et al. (1997)." httpUri="https://zenodo.org/record/3349479/files/figure.png" pageId="2" pageNumber="295">3A</figureCitation>
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)
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</paragraph>
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</subSubSection>
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<subSubSection id="C3386510FFBB141DFF11FB90FCC306F1" lastPageId="5" lastPageNumber="298" pageId="2" pageNumber="295" type="materials_examined">
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<paragraph id="8B9D369BFFBB141AFF11FB90FB450568" blockId="2.[151,1437,1124,2015]" box="[151,1248,1124,1151]" pageId="2" pageNumber="295">
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<emphasis id="B956EA89FFBB141AFF11FB90FE240568" bold="true" box="[151,385,1124,1151]" pageId="2" pageNumber="295">Material examined.</emphasis>
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<materialsCitation id="3B4A3CC6FFBB141AFE01FB91FB450568" ID-GBIF-Occurrence="2294326639" box="[391,1248,1125,1151]" collectionCode="MACN-A" pageId="2" pageNumber="295" specimenCode="MACN-A 12701" specimenCount="1" typeStatus="holotype">
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<typeStatus id="54998839FFBB141AFE01FB91FE560568" box="[391,499,1125,1151]" pageId="2" pageNumber="295" type="holotype">Holotype</typeStatus>
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.
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<specimenCode id="DB849EE0FFBB141AFE78FB91FD1B0568" box="[510,702,1125,1151]" collectionCode="MACN-A" pageId="2" pageNumber="295">MACN-A 12701</specimenCode>
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, nearly complete dorsal carapace (
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<figureCitation id="13192A1EFFBB141AFBB9FB91FB040568" box="[1087,1185,1125,1151]" captionStart="FIGURE 2" captionStartId="3.[151,250,1120,1145]" captionTargetBox="[345,1236,621,1077]" captionTargetId="figure@3.[340,1247,611,1095]" captionTargetPageId="3" captionText="FIGURE 2. A–D, Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian) in A, dorsal, B, ventral, C, posterior, and D, right lateral views. E, Label handwritten by Florentino Ameghino associated to MACN-A 12701. Abbreviations: ar, anterior ridge; cg, cervical groove; cr, cardiac region; lf, lateral flank; mgr, metagastric region; mr, median ridge; no, notch; pr, posterior ridge. Scale bar equals 5 mm." httpUri="https://zenodo.org/record/3349477/files/figure.png" pageId="2" pageNumber="295">Figure 2</figureCitation>
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,
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<figureCitation id="13192A1EFFBB141AFB2BFB91FB760568" box="[1197,1235,1125,1151]" captionStart="FIGURE 3" captionStartId="3.[151,250,1633,1658]" captionTargetBox="[355,1236,1321,1603]" captionTargetId="figure@3.[340,1247,1311,1609]" captionTargetPageId="3" captionText="FIGURE 3. A, Photograph of Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian). B, Photograph and C, interpretative drawing of the retroplumid crab Costacopluma salamanca (holotype, Colección de Paleontología de la Facultad de Ciencias Exactas y Naturales de la Universidad de Buenos Aires 17376). Not to scale. B and C, modified from Feldmann et al. (1997)." httpUri="https://zenodo.org/record/3349479/files/figure.png" pageId="2" pageNumber="295">3A</figureCitation>
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).
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</materialsCitation>
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</paragraph>
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<paragraph id="8B9D369BFFBB141AFF41FB7CFE04071B" blockId="2.[151,1437,1124,2015]" pageId="2" pageNumber="295">
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<emphasis id="B956EA89FFBB141AFF41FB7CFE6E05B4" bold="true" box="[199,459,1160,1187]" pageId="2" pageNumber="295">Locality and horizon.</emphasis>
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The original label indicates “Salamancan, Western Río Chico”. This fossil area is located in
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<collectingRegion id="49E6F879FFBB141AFF7FFB59FE1C05D0" box="[249,441,1197,1223]" country="Argentina" name="Chubut" pageId="2" pageNumber="295">Chubut province</collectingRegion>
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, Patagonia,
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<collectingCountry id="F335760BFFBB141AFDC4FB59FD1005D0" box="[578,693,1197,1223]" name="Argentina" pageId="2" pageNumber="295">Argentina</collectingCountry>
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. No more details about the exact provenance of the specimen are available (see
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<bibRefCitation id="EFB34B6AFFBB141AFEB1FB25FE7905FC" author="Simpson, G. G." box="[311,476,1233,1259]" pageId="2" pageNumber="295" pagination="1 - 13" refId="ref4778" refString="Simpson, G. G. (1933) Stratigraphic nomenclature of the early Tertiary of central Patagonia. American Museum of Natural History Novitates, 644, 1 - 13." type="journal article" year="1933">Simpson 1933</bibRefCitation>
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).
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<bibRefCitation id="EFB34B6AFFBB141AFE6BFB25FD0A05FC" author="Ameghino, F." box="[493,687,1233,1259]" pageId="2" pageNumber="295" pagination="1 - 568" refId="ref3114" refString="Ameghino, F. (1906) Les formations sedimentaires du Cretace et du tertiare de Patagonie, avec un paralelle entre leurs faunes mammalogiques et celles de l'ancien continent. Anales del Museo Nacional de Historia Natural, 15 (8), 1 - 568." type="journal article" year="1906">Ameghino (1906</bibRefCitation>
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,
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<bibRefCitation id="EFB34B6AFFBB141AFD3CFB24FD5605FC" author="Ameghino, F." box="[698,755,1232,1259]" pageId="2" pageNumber="295" pagination="619 - 647" refId="ref3162" refString="Ameghino, F. (1935) Nuevas especies de selaceos terciario cretaceos de Patagonia. In: Torcelli, J. (Ed.), Obras Completas y Correspondencia Cientifica de Florentino Ameghino. Buenos Aires, pp. 619 - 647." type="book chapter" year="1935">1935</bibRefCitation>
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) described a large number of shark taxa from the “Piso Salamanquense” (Salamancan Stage). The Salamancan Stage is dated as late Danian−early Thanetian (
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<bibRefCitation id="EFB34B6AFFBB141AFB62FB01FF770424" author="Arratia, G. & Cione, A." pageId="2" pageNumber="295" pagination="9 - 72" refId="ref3249" refString="Arratia, G. & Cione, A. (1996) The Record of Fossil Fishes of Southern South America. Muncher Geowissenschaftliche Abhandlungen. Reihe A. Geologie und Palaontologie, 30, 9 - 72." type="journal article" year="1996">Arratia & Cione 1996</bibRefCitation>
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;
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||
<bibRefCitation id="EFB34B6AFFBB141AFF58FAEDFE360424" author="Foix, N. & Paredes, J. M. & Giacosa, R. E." box="[222,403,1305,1331]" pageId="2" pageNumber="295" pagination="110 - 118" refId="ref4273" refString="Foix, N., Paredes, J. M. & Giacosa, R. E. (2012) Upper Cretaceous-Paleocene normal reactivation phase in the Golfo San Jorge Basin (Argentine): growth-fault models, paleoseismicity and paleostress analysis. Journal of South American Earth Sciences, 33, 110 - 118." type="journal article" year="2012">
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Foix
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<emphasis id="B956EA89FFBB141AFE9EFAEEFEF40424" box="[280,337,1305,1331]" italics="true" pageId="2" pageNumber="295">et al.</emphasis>
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2012
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</bibRefCitation>
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,
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<bibRefCitation id="EFB34B6AFFBB141AFE18FAECFE7C0424" author="Foix, N. & Paredes, J. M. & Giacosa, R. E. & Allard, J. O." box="[414,473,1304,1331]" pageId="2" pageNumber="295" pagination="96 - 106" refId="ref4210" refString="Foix, N., Paredes, J. M., Giacosa, R. E. & Allard, J. O. (2015) Arquitectura estratigrafica del paleoceno en el flanco norte de la cuenca del golfo San Jorge, Patagonia central. Revista de la Asociacion Geologica Argentina, 72 (1), 96 - 106." type="journal article" year="2015">2015</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFE63FAEDFD0D0424" author="Clyde, W. C. & Wilf, P. & Iglesias, A. & Slingerland, R. L. & Barnum, T. & Bijl, P. K. & Bralower T. J. & Brinkhuis, H. & Comer, E. E. & Huber, B. T. & Ibanez-Mejia, M. & Jicha, B. R. & Krause, J. M. & Schueth, J. D. & Singer, B. & Raigemborn, M. S. & Schmitz, M. D. & Sluijs, A. & Zamaloa, M." box="[485,680,1305,1331]" pageId="2" pageNumber="295" pagination="289 - 306" refId="ref3712" refString="Clyde, W. C., Wilf, P., Iglesias, A., Slingerland, R. L., Barnum, T., Bijl, P. K. Bralower T. J., Brinkhuis, H., Comer, E. E., Huber, B. T., Ibanez-Mejia, M., Jicha, B. R., Krause, J. M., Schueth, J. D., Singer, B., Raigemborn, M. S., Schmitz, M. D., Sluijs, A. & Zamaloa, M. (2014) New age constraints for the Salamanca Formation and lower Rio Chico Group in the western San Jorge Basin, Patagonia, Argentina: Implications for Cretaceous-Paleogene extinction recovery and land mammal age correlations. Geological Society of America Bulletin, 126 (3 - 4), 289 - 306." type="journal article" year="2014">
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Clyde
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<emphasis id="B956EA89FFBB141AFDA9FAEEFDC20424" box="[559,615,1305,1331]" italics="true" pageId="2" pageNumber="295">et al.</emphasis>
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2014
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</bibRefCitation>
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) and palaeomagnetic evidence in the northern part of the basin correlates it with chron 27r (63.3-61.9 Ma, late Danian). The shallow marine Salamanca Formation is the stratigraphically lowest Cenozoic geological unit in the San Jorge Basin of central Patagonia (
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<collectingCountry id="F335760BFFBB141AFBBCFA95FB08046B" box="[1082,1197,1377,1404]" name="Argentina" pageId="2" pageNumber="295">Argentina</collectingCountry>
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) and has a rich fossil record of marine microorganisms (
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<bibRefCitation id="EFB34B6AFFBB141AFDA1FA71FD440488" author="Frenguelli, J." box="[551,737,1413,1439]" pageId="2" pageNumber="295" pagination="3 - 65" refId="ref4330" refString="Frenguelli, J. (1936) El banco verde de paso Niemann del rio Chico en el Chubut y sus Diatomeas. Extracto de la Revista del Museo de La Plata, 1, 3 - 65." type="journal article" year="1936">Frenguelli 1936</bibRefCitation>
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;
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<bibRefCitation id="EFB34B6AFFBB141AFD76FA71FC3A0488" author="Camacho, H." box="[752,927,1412,1439]" pageId="2" pageNumber="295" pagination="31 - 35" refId="ref3539" refString="Camacho, H. (1954) Some Upper Cretaceous Foraminifera from Argentina. Contributions from the Cushman Foundation for Foraminiferal Research, 5, 31 - 35." type="journal article" year="1954">Camacho 1954</bibRefCitation>
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||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFC2BFA71FC4D0488" author="Camacho, H." box="[941,1000,1413,1439]" pageId="2" pageNumber="295" pagination="253 - 280" refId="ref3508" refString="Camacho, H. (1967) Las transgresiones del Cretacico Superior y Terciario de la Argentina. Revista de la Asociacion Geologica Argentina, 22, 253 - 280." type="journal article" year="1967">1967</bibRefCitation>
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||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFC71FA71FB330488" author="Mendez, I." box="[1015,1174,1413,1439]" pageId="2" pageNumber="295" pagination="127 - 157" refId="ref4653" refString="Mendez, I. (1966) Foraminiferos, edad y correlacion estratigrafica del Salamanquense de Punta Peligro (45 ° 30 ' S; 67 ° 11 ' W) provincia del Chubut. Revista de la Asociacion Geologica Argentina, 21 (2), 127 - 157." type="journal article" year="1966">Méndez 1966</bibRefCitation>
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||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFB23FA71FA9B0488" author="Masiuk, V." box="[1189,1342,1413,1439]" pageId="2" pageNumber="295" pagination="197 - 258" refId="ref4529" refString="Masiuk, V. (1967) Estratigrafia del Rocanense del Puesto P. Alvarez. Curso inferior del Rio Chico, Prov. del Chubut. Revista Museo de La Plata n. s. Paleontologia, 5, 197 - 258." type="journal article" year="1967">Masiuk 1967</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFACBFA71FF7704D4" author="Bertels, A." pageId="2" pageNumber="295" pagination="429 - 450" refId="ref3340" refString="Bertels, A. (1975) Bioestratigrafia del Paleogeno marino en la Republica Argentina. Revista Espanola de Micropaleontologia, 7, 429 - 450." type="journal article" year="1975">Bertels 1975</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFF66FA5DFE6204D4" author="Matheos, S. D. & Brea, M. & Zucol, A. F. & Pramparo, M. & Raigemborn, M. S. & Iglesias, A. & Fischer, A." box="[224,455,1448,1475]" pageId="2" pageNumber="295" pagination="83 - 90" refId="ref4573" refString="Matheos, S. D., Brea, M., Zucol, A. F., Pramparo, M., Raigemborn, M. S., Iglesias, A., & Fischer, A. (2005) Analisis paleoambiental de las sedimentitas del Daniano del sector sur de los Lagos Musters y Colhue Huapi (Chubut, Argentina). Actas del 16 Congreso Geologico Argentino, 3, 83 - 90." type="journal article" year="2005">
|
||
Matheos
|
||
<emphasis id="B956EA89FFBB141AFECCFA5EFE2104D4" box="[330,388,1449,1475]" italics="true" pageId="2" pageNumber="295">et al.</emphasis>
|
||
2005
|
||
</bibRefCitation>
|
||
) and invertebrates (
|
||
<bibRefCitation id="EFB34B6AFFBB141AFD2CFA5DFCE404D4" author="Ihering, H. von" box="[682,833,1449,1475]" pageId="2" pageNumber="295" pagination="193 - 231" refId="ref4469" refString="Ihering, H. von (1903) Les mollusques des terrains Cretaciques superieurs de l'Argentine orientale. Anales de la Sociedad Cientifica Argentina, 2, 193 - 231." type="journal article" year="1903">Ihering 1903</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFCC9FA5DFC5704D4" author="Feruglio, E." box="[847,1010,1449,1475]" pageId="2" pageNumber="295" pagination="1 - 349" refId="ref4187" refString="Feruglio, E. (1949) Descripcion geologica de la Patagonia. Yacimientos Petroliferos Fiscales, 2, 1 - 349." type="journal article" year="1949">Feruglio 1949</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFC79FA5DFB0804D4" author="Camacho, H." box="[1023,1197,1449,1475]" pageId="2" pageNumber="295" pagination="253 - 280" refId="ref3508" refString="Camacho, H. (1967) Las transgresiones del Cretacico Superior y Terciario de la Argentina. Revista de la Asociacion Geologica Argentina, 22, 253 - 280." type="journal article" year="1967">Camacho 1967</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFB3DFA5DFF7704F0" author="Chebli, G. & Serraiotto, A." pageId="2" pageNumber="295" pagination="311 - 318" refId="ref3619" refString="Chebli, G. & Serraiotto, A. (1974) Nuevas localidades del Paleoceno marino en la region central de la Provincia del Chubut. Revista de la Asociacion Geologica Argentina, 29, 311 - 318." type="journal article" year="1974">Chebli & Serraiotto 1974</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFF5BFA39FEDC04F0" author="Andreis, R. R." box="[221,377,1485,1511]" pageId="2" pageNumber="295" pagination="77 - 102" refId="ref3207" refString="Andreis, R. R. (1977) Geologia del area de Canadon Hondo. Departamento de Escalante, Provincia del Chubut, Republica Argentina. Obra del Centenario del Museo de La Plata, 4, 77 - 102." type="journal article" year="1977">Andreis 1977</bibRefCitation>
|
||
;
|
||
<bibRefCitation id="EFB34B6AFFBB141AFE00FA39FD3704F0" author="Parma, S. G. & Casadio, S." box="[390,658,1484,1511]" pageId="2" pageNumber="295" pagination="1072 - 1087" refId="ref4742" refString="Parma, S. G. & Casadio, S. (2005) Upper Cretaceous-Paleocene echinoids from Northern Patagonia, Argentina. Journal of Paleontology, 79 (6), 1072 - 1087." type="journal article" year="2005">Parma & Casadío 2005</bibRefCitation>
|
||
). This unit represents the first Atlantic transgression in the San Jorge Basin (
|
||
<bibRefCitation id="EFB34B6AFFBB141AFF63FA05FE31071B" author="Camacho, H." box="[229,404,1521,1548]" pageId="2" pageNumber="295" pagination="253 - 280" refId="ref3508" refString="Camacho, H. (1967) Las transgresiones del Cretacico Superior y Terciario de la Argentina. Revista de la Asociacion Geologica Argentina, 22, 253 - 280." type="journal article" year="1967">Camacho 1967</bibRefCitation>
|
||
).
|
||
</paragraph>
|
||
<paragraph id="8B9D369BFFBB141BFF41F9E0FD5A0008" blockId="2.[151,1437,1124,2015]" lastBlockId="3.[151,1437,153,287]" lastPageId="3" lastPageNumber="296" pageId="2" pageNumber="295">
|
||
<emphasis id="B956EA89FFBB141AFF41F9E0FEFC0738" bold="true" box="[199,345,1556,1583]" pageId="2" pageNumber="295">Description.</emphasis>
|
||
At first sight, the specimen does not belong to the tooth plate of a vertebrate because it lacks dentine, enamel or cement. Indeed, the external surface possesses a complex pattern, with inflated areas, ridges and grooves, which closely resembles that of decapodan dorsal carapaces (
|
||
<figureCitation id="13192A1EFFBB141AFC6BF9A9FBF40760" box="[1005,1105,1629,1655]" captionStart="FIGURE 2" captionStartId="3.[151,250,1120,1145]" captionTargetBox="[345,1236,621,1077]" captionTargetId="figure@3.[340,1247,611,1095]" captionTargetPageId="3" captionText="FIGURE 2. A–D, Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian) in A, dorsal, B, ventral, C, posterior, and D, right lateral views. E, Label handwritten by Florentino Ameghino associated to MACN-A 12701. Abbreviations: ar, anterior ridge; cg, cervical groove; cr, cardiac region; lf, lateral flank; mgr, metagastric region; mr, median ridge; no, notch; pr, posterior ridge. Scale bar equals 5 mm." httpUri="https://zenodo.org/record/3349477/files/figure.png" pageId="2" pageNumber="295">Figure 2</figureCitation>
|
||
,
|
||
<figureCitation id="13192A1EFFBB141AFBD9F9A9FBC90760" box="[1119,1132,1629,1655]" captionStart="FIGURE 3" captionStartId="3.[151,250,1633,1658]" captionTargetBox="[355,1236,1321,1603]" captionTargetId="figure@3.[340,1247,1311,1609]" captionTargetPageId="3" captionText="FIGURE 3. A, Photograph of Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian). B, Photograph and C, interpretative drawing of the retroplumid crab Costacopluma salamanca (holotype, Colección de Paleontología de la Facultad de Ciencias Exactas y Naturales de la Universidad de Buenos Aires 17376). Not to scale. B and C, modified from Feldmann et al. (1997)." httpUri="https://zenodo.org/record/3349479/files/figure.png" pageId="2" pageNumber="295">3</figureCitation>
|
||
B-C). The external surface of the carapace is slightly weathered and, as a result, its fine ornamentation cannot be distinctly observed, but it is generally ornamented by very small subcircular bulges. The carapace is relatively small (
|
||
<tableCitation id="C6A00320FFBB141AFB27F951FB5007A8" box="[1185,1269,1701,1727]" captionStart="TABLE 1" captionStartId="3.[151,244,332,359]" captionTargetBox="[393,1129,410,516]" captionText="TABLE 1. Measurements of Platyacrodus unicus (holotype, MACN-A 12701) in millimetres. The measurements are the maximum measurable." httpUri="http://table.plazi.org/id/DF5D6613FFBA141BFF11FEB8FE4C009C" pageId="2" pageNumber="295" tableUuid="DF5D6613FFBA141BFF11FEB8FE4C009C">Table 1</tableCitation>
|
||
), its surface is distinctly dorsoventrally flattened, and it possesses two convex, elevated median areas. The anterior elevation is approximately centred in the external surface of the carapace and corresponds to the metagastric region. The posterior elevation is lateromedially broader and corresponds to the cardiac region. Both regions are separated from each other by the posterior extension of the cervical groove that delimits the metagastric region laterally. There are three pairs of mainly lateromedially-oriented ridges. The anterior and median ridges are slightly anterolaterally oriented and converge at the median line and with the anterior portion of the metagastric region. The median ridges are sharper than the anterior ones and extend posteromedially up to the level of the groove separating the metagastric and cardiac regions. The posterior ridges are very slightly posterolaterally oriented and do not intersect the median ridge. The fronto-orbital margin of the carapace seems to be damaged and, as a result, a rostrum or anterior teeth (if they were present) are not preserved. The posterior margin possesses a deep median notch for articulation with the first pleonal somite. The lateral flanks of the carapace form a slightly acute angle with the dorsal surface. The internal surface of the carapace is covered with matrix.
|
||
</paragraph>
|
||
<caption id="DF5D6613FFBA141BFF11FEB8FE4C009C" ID-Table-UUID="DF5D6613FFBA141BFF11FEB8FE4C009C" httpUri="http://table.plazi.org/id/DF5D6613FFBA141BFF11FEB8FE4C009C" pageId="3" pageNumber="296" startId="3.[151,244,332,359]" targetBox="[393,1129,410,516]" targetIsTable="true" targetPageId="3">
|
||
<paragraph id="8B9D369BFFBA141BFF11FEB8FE4C009C" blockId="3.[151,1436,332,395]" pageId="3" pageNumber="296">
|
||
<materialsCitation id="3B4A3CC6FFBA141BFF11FEB8FBB10070" ID-GBIF-Occurrence="2294326638" box="[151,1044,332,359]" collectionCode="TABLE" pageId="3" pageNumber="296" specimenCode="TABLE 1, MACN-A 12701" specimenCount="1" typeStatus="holotype">
|
||
<emphasis id="B956EA89FFBA141BFF11FEB8FEB70070" bold="true" box="[151,274,332,359]" pageId="3" pageNumber="296">
|
||
<specimenCode id="DB849EE0FFBA141BFF11FEB8FEAF0070" box="[151,266,332,359]" collectionCode="TABLE" pageId="3" pageNumber="296">TABLE 1</specimenCode>
|
||
.
|
||
</emphasis>
|
||
Measurements of
|
||
<taxonomicName id="4C224D18FFBA141BFE62FEB9FD6F0070" authorityName="Ameghino" authorityYear="1935" box="[484,714,333,359]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="296" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBA141BFE62FEB9FD6F0070" box="[484,714,333,359]" italics="true" pageId="3" pageNumber="296">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
(
|
||
<typeStatus id="54998839FFBA141BFD5CFEB9FCE50070" box="[730,832,333,359]" pageId="3" pageNumber="296" type="holotype">holotype</typeStatus>
|
||
,
|
||
<specimenCode id="DB849EE0FFBA141BFCCBFEB9FBA90070" box="[845,1036,333,359]" collectionCode="MACN-A" pageId="3" pageNumber="296">MACN-A 12701</specimenCode>
|
||
)
|
||
</materialsCitation>
|
||
in millimetres. The measurements are the maximum measurable.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="8B9D369BFFBA141BFE1EFE6EFBCC0314" pageId="3" pageNumber="296">
|
||
<table id="F922C43BFFBAEBE7FE0FFE6EFBCC0313" box="[393,1129,410,516]" gridcols="2" gridrows="3" pageId="3" pageNumber="296">
|
||
<tr id="351234D9FFBAEBE7FE0FFE6EFBCC00A4" box="[393,1129,410,435]" gridrow="0" pageId="3" pageNumber="296">
|
||
<th id="76C35DA5FFBAEBE7FE0FFE6EFDCB00A4" box="[393,622,410,435]" gridcol="0" gridrow="0" pageId="3" pageNumber="296">Lateromedial width</th>
|
||
<th id="76C35DA5FFBAEBE7FBCFFE6EFBCC00A4" box="[1097,1129,410,435]" gridcol="1" gridrow="0" pageId="3" pageNumber="296">7.4</th>
|
||
</tr>
|
||
<tr id="351234D9FFBAEBE7FE0FFE36FBCC00CC" box="[393,1129,450,475]" gridrow="1" pageId="3" pageNumber="296">
|
||
<td id="76C35DA5FFBAEBE7FE0FFE36FDCB00CC" box="[393,622,450,475]" gridcol="0" gridrow="1" pageId="3" pageNumber="296">Anteroposterior length</td>
|
||
<td id="76C35DA5FFBAEBE7FBCFFE36FBCC00CC" box="[1097,1129,450,475]" gridcol="1" gridrow="1" pageId="3" pageNumber="296">6.8</td>
|
||
</tr>
|
||
<tr id="351234D9FFBAEBE7FE0FFE1FFBCC0313" box="[393,1129,491,516]" gridrow="2" pageId="3" pageNumber="296">
|
||
<td id="76C35DA5FFBAEBE7FE0FFE1FFDCB0313" box="[393,622,491,516]" gridcol="0" gridrow="2" pageId="3" pageNumber="296">Dorsoventral height</td>
|
||
<td id="76C35DA5FFBAEBE7FBCFFE1FFBCC0313" box="[1097,1129,491,516]" gridcol="1" gridrow="2" pageId="3" pageNumber="296">2.3</td>
|
||
</tr>
|
||
</table>
|
||
</paragraph>
|
||
<caption id="DF5D6613FFBA141BFF11FB94FD5605F3" httpUri="https://zenodo.org/record/3349477/files/figure.png" pageId="3" pageNumber="296" startId="3.[151,250,1120,1145]" targetBox="[345,1236,621,1077]" targetPageId="3">
|
||
<paragraph id="8B9D369BFFBA141BFF11FB94FD5605F3" blockId="3.[151,1437,1120,1253]" pageId="3" pageNumber="296">
|
||
<emphasis id="B956EA89FFBA141BFF11FB94FEEC056E" bold="true" box="[151,329,1120,1145]" pageId="3" pageNumber="296">FIGURE 2. A–D</emphasis>
|
||
,
|
||
<taxonomicName id="4C224D18FFBA141BFEDDFB94FD8C056F" authorityName="Ameghino" authorityYear="1935" box="[347,553,1120,1144]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="296" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBA141BFEDDFB94FD8C056F" box="[347,553,1120,1144]" italics="true" pageId="3" pageNumber="296">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
(holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian) in
|
||
<emphasis id="B956EA89FFBA141BFA9BFB94FA8A056E" bold="true" box="[1309,1327,1120,1145]" pageId="3" pageNumber="296">A</emphasis>
|
||
, dorsal,
|
||
<emphasis id="B956EA89FFBA141BFA03FB95FA33056E" bold="true" box="[1413,1430,1121,1145]" pageId="3" pageNumber="296">B</emphasis>
|
||
, ventral,
|
||
<emphasis id="B956EA89FFBA141BFF6DFB70FF58058A" bold="true" box="[235,253,1156,1181]" pageId="3" pageNumber="296">C</emphasis>
|
||
, posterior, and
|
||
<emphasis id="B956EA89FFBA141BFE1AFB71FE0B058A" bold="true" box="[412,430,1157,1181]" pageId="3" pageNumber="296">D</emphasis>
|
||
, right lateral views.
|
||
<emphasis id="B956EA89FFBA141BFD07FB71FD37058A" bold="true" box="[641,658,1157,1181]" pageId="3" pageNumber="296">E</emphasis>
|
||
, Label handwritten by Florentino Ameghino associated to MACN-A 12701. Abbreviations: ar, anterior ridge; cg, cervical groove; cr, cardiac region; lf, lateral flank; mgr, metagastric region; mr, median ridge; no, notch; pr, posterior ridge. Scale bar equals 5 mm.
|
||
</paragraph>
|
||
</caption>
|
||
<caption id="DF5D6613FFBA141BFF11F995FD8507F1" httpUri="https://zenodo.org/record/3349479/files/figure.png" pageId="3" pageNumber="296" startId="3.[151,250,1633,1658]" targetBox="[355,1236,1321,1603]" targetPageId="3">
|
||
<paragraph id="8B9D369BFFBA141BFF11F995FD8507F1" blockId="3.[151,1437,1633,1766]" pageId="3" pageNumber="296">
|
||
<emphasis id="B956EA89FFBA141BFF11F995FE90076D" bold="true" box="[151,309,1633,1658]" pageId="3" pageNumber="296">FIGURE 3. A,</emphasis>
|
||
Photograph of
|
||
<taxonomicName id="4C224D18FFBA141BFE5FF996FD0C076D" authorityName="Ameghino" authorityYear="1935" box="[473,681,1634,1658]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="296" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBA141BFE5FF996FD0C076D" box="[473,681,1634,1658]" italics="true" pageId="3" pageNumber="296">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
(holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian).
|
||
<emphasis id="B956EA89FFBA141BFF11F972FF0B0789" bold="true" box="[151,174,1670,1694]" pageId="3" pageNumber="296">B,</emphasis>
|
||
Photograph and
|
||
<emphasis id="B956EA89FFBA141BFED8F971FED50789" bold="true" box="[350,368,1669,1694]" pageId="3" pageNumber="296">C</emphasis>
|
||
, interpretative drawing of the retroplumid crab
|
||
<taxonomicName id="4C224D18FFBA141BFCDBF972FBC10789" authorityName="Feldmann, Rodriguez, Martinez & Aguirre-Urreta" authorityYear="1997" box="[861,1124,1670,1694]" class="Malacostraca" family="Retroplumidae" genus="Costacopluma" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="296" phylum="Arthropoda" rank="species" species="salamanca">
|
||
<emphasis id="B956EA89FFBA141BFCDBF972FBC10789" box="[861,1124,1670,1694]" italics="true" pageId="3" pageNumber="296">Costacopluma salamanca</emphasis>
|
||
</taxonomicName>
|
||
(holotype, Colección de Paleontología de la Facultad de Ciencias Exactas y Naturales de la Universidad de Buenos Aires 17376). Not to scale. B and C, modified from
|
||
<bibRefCitation id="EFB34B6AFFBA141BFEB7F939FDB907F1" author="Feldmann, R. M. & Rodriguez, M. F. & Martinez, G. A. & Aguirre-Urreta, M." box="[305,540,1741,1766]" pageId="3" pageNumber="296" pagination="125 - 130" refId="ref4075" refString="Feldmann, R. M., Rodriguez, M. F., Martinez, G. A. & Aguirre-Urreta, M. (1997) Costacopluma salamanca new species (Decapoda, Retroplumidae) from the Salamanca Formation (Danian) of Patagonia, Argentina. Journal of Paleontology, 71 (1), 125 - 130." type="journal article" year="1997">
|
||
Feldmann
|
||
<emphasis id="B956EA89FFBA141BFE1AF93BFE7507F1" box="[412,464,1742,1766]" italics="true" pageId="3" pageNumber="296">et al.</emphasis>
|
||
(1997)
|
||
</bibRefCitation>
|
||
.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="8B9D369BFFBA141BFF41F8DAFD6706EB" blockId="3.[151,1437,1838,2044]" pageId="3" pageNumber="296">
|
||
<emphasis id="B956EA89FFBA141BFF41F8DAFE91065F" bold="true" box="[199,308,1838,1864]" pageId="3" pageNumber="296">Remarks</emphasis>
|
||
. The revision of the Ameghino fossil collection has allowed the rediscovery of a specimen that completely matched the original description of
|
||
<taxonomicName id="4C224D18FFBA141BFDFCF8A6FCFB067B" authorityName="Ameghino" authorityYear="1935" box="[634,862,1874,1900]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="296" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBA141BFDFCF8A6FCFB067B" box="[634,862,1874,1900]" italics="true" pageId="3" pageNumber="296">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
by
|
||
<bibRefCitation id="EFB34B6AFFBA141BFC01F8A6FBF6067B" author="Ameghino, F." box="[903,1107,1873,1900]" pageId="3" pageNumber="296" pagination="619 - 647" refId="ref3162" refString="Ameghino, F. (1935) Nuevas especies de selaceos terciario cretaceos de Patagonia. In: Torcelli, J. (Ed.), Obras Completas y Correspondencia Cientifica de Florentino Ameghino. Buenos Aires, pp. 619 - 647." type="book chapter" year="1935">Ameghino (1935)</bibRefCitation>
|
||
. However, when it was originally rediscovered, the specimen lacked a catalogue number, and a label indicating its taxonomic assignment. The only available information in the label was its locality and horizon (
|
||
<figureCitation id="13192A1EFFBA141BFC22F86EFBBE06A3" box="[932,1051,1946,1972]" captionStart="FIGURE 4" captionStartId="4.[151,250,1844,1869]" captionTargetBox="[404,1184,181,1815]" captionTargetId="figure@4.[404,1184,181,1819]" captionTargetPageId="4" captionText="FIGURE 4. A, Cover of notebook including unpublished original illustrations of several Salamancan shark species described by Florentino Ameghino; B, original unpublished drawings of the holotype of Platyacrodus unicus that were found in the “Archivo Histórico del Museo Argentino de Ciencias Naturales” by Dr. Hugo P. Castello." httpUri="https://zenodo.org/record/3349481/files/figure.png" pageId="3" pageNumber="296">Figure 4E</figureCitation>
|
||
). The location of the unpublished drawings of the specimen drawn by F. Ameghino (
|
||
<figureCitation id="13192A1EFFBA141BFD4AF84AFC8806CF" box="[716,813,1982,2008]" captionStart="FIGURE 4" captionStartId="4.[151,250,1844,1869]" captionTargetBox="[404,1184,181,1815]" captionTargetId="figure@4.[404,1184,181,1819]" captionTargetPageId="4" captionText="FIGURE 4. A, Cover of notebook including unpublished original illustrations of several Salamancan shark species described by Florentino Ameghino; B, original unpublished drawings of the holotype of Platyacrodus unicus that were found in the “Archivo Histórico del Museo Argentino de Ciencias Naturales” by Dr. Hugo P. Castello." httpUri="https://zenodo.org/record/3349481/files/figure.png" pageId="3" pageNumber="296">Figure 4</figureCitation>
|
||
) was also an important key for the identification of this specimen as the
|
||
<typeStatus id="54998839FFBA141BFEC9F816FE1406EB" box="[335,433,2018,2044]" pageId="3" pageNumber="296" type="holotype">holotype</typeStatus>
|
||
of
|
||
<taxonomicName id="4C224D18FFBA141BFE51F816FD1E06EB" authorityName="Ameghino" authorityYear="1935" box="[471,699,2018,2044]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="3" pageNumber="296" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBA141BFE51F816FD1E06EB" box="[471,699,2018,2044]" italics="true" pageId="3" pageNumber="296">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
.
|
||
</paragraph>
|
||
<caption id="DF5D6613FFBD141CFF11F8C0FC180682" httpUri="https://zenodo.org/record/3349481/files/figure.png" pageId="4" pageNumber="297" startId="4.[151,250,1844,1869]" targetBox="[404,1184,181,1815]" targetPageId="4">
|
||
<paragraph id="8B9D369BFFBD141CFF11F8C0FC180682" blockId="4.[151,1436,1844,1942]" pageId="4" pageNumber="297">
|
||
<emphasis id="B956EA89FFBD141CFF11F8C0FE8D065A" bold="true" box="[151,296,1844,1869]" pageId="4" pageNumber="297">FIGURE 4. A</emphasis>
|
||
, Cover of notebook including unpublished original illustrations of several Salamancan shark species described by Florentino Ameghino;
|
||
<emphasis id="B956EA89FFBD141CFEFAF8ADFE280666" bold="true" box="[380,397,1881,1905]" pageId="4" pageNumber="297">B</emphasis>
|
||
, original unpublished drawings of the holotype of
|
||
<taxonomicName id="4C224D18FFBD141CFC0CF8ADFBF20666" authorityName="Ameghino" authorityYear="1935" box="[906,1111,1881,1905]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="4" pageNumber="297" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBD141CFC0CF8ADFBF20666" box="[906,1111,1881,1905]" italics="true" pageId="4" pageNumber="297">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
that were found in the “Archivo Histórico del Museo Argentino de Ciencias Naturales” by Dr. Hugo P. Castello.
|
||
</paragraph>
|
||
</caption>
|
||
<caption id="DF5D6613FFBC141DFF11FA2EFC330700" httpUri="https://zenodo.org/record/3349483/files/figure.png" pageId="5" pageNumber="298" startId="5.[151,250,1498,1523]" targetBox="[359,1204,181,1468]" targetPageId="5">
|
||
<paragraph id="8B9D369BFFBC141DFF11FA2EFC330700" blockId="5.[151,1436,1498,1559]" pageId="5" pageNumber="298">
|
||
<emphasis id="B956EA89FFBC141DFF11FA2EFEAB04E4" bold="true" box="[151,270,1498,1523]" pageId="5" pageNumber="298">FIGURE 5</emphasis>
|
||
. Original page with the description of
|
||
<taxonomicName id="4C224D18FFBC141DFD1CFA2FFCCC04E5" authorityName="Ameghino" authorityYear="1935" box="[666,873,1499,1523]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBC141DFD1CFA2FFCCC04E5" box="[666,873,1499,1523]" italics="true" pageId="5" pageNumber="298">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
handwritten by Florentino Ameghino. The specimen is housed at the Historical Archive of the MACN. Courtesy of Ignacio Legari.
|
||
</paragraph>
|
||
</caption>
|
||
<paragraph id="8B9D369BFFBC141DFF41F9B4FCC306F1" blockId="5.[151,1437,1600,2022]" pageId="5" pageNumber="298">
|
||
The morphology observed in this specimen,
|
||
<collectionCode id="ED33AE5EFFBC141DFD48F9B4FC9B074D" box="[718,830,1600,1626]" pageId="5" pageNumber="298">MACN-A</collectionCode>
|
||
12701, indicates that it probably should be referred to the genus
|
||
<taxonomicName id="4C224D18FFBC141DFEACF990FD460769" authority="Collins & Morris, 1975" authorityName="Collins & Morris" authorityYear="1975" box="[298,739,1635,1662]" class="Malacostraca" family="Retroplumidae" genus="Costacopluma" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="B956EA89FFBC141DFEACF990FE690769" box="[298,460,1636,1662]" italics="true" pageId="5" pageNumber="298">Costacopluma</emphasis>
|
||
<bibRefCitation id="EFB34B6AFFBC141DFE52F990FD460769" author="Collins, J. S. H. & Morris, S. F." box="[468,739,1635,1662]" pageId="5" pageNumber="298" pagination="823 - 829" refId="ref3880" refString="Collins, J. S. H. & Morris, S. F. (1975) A new crab Costacopluma concava from the Upper Cretaceous of Nigeria. Palaeontology, 18, 823 - 829." type="journal article" year="1975">Collins & Morris, 1975</bibRefCitation>
|
||
</taxonomicName>
|
||
, of the brachyuran family
|
||
<taxonomicName id="4C224D18FFBC141DFB97F990FB1F0769" authorityName="Gill" authorityYear="1894" box="[1041,1210,1636,1662]" class="Malacostraca" family="Retroplumidae" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Arthropoda" rank="family">Retroplumidae</taxonomicName>
|
||
, because it matches the following diagnosis of the genus: wider than long carapace with a distinctly flattened surface crossed by three elevated ridges, the anteriormost complete and the medial and posterior ridges converging mesially to define a depressed, triangular mesobranchial region (
|
||
<bibRefCitation id="EFB34B6AFFBC141DFDEBF924FC2A07FD" author="Feldmann R. M. & Portell, R. W." box="[621,911,1744,1770]" pageId="5" pageNumber="298" pagination="90 - 96" refId="ref3918" refString="Feldmann R. M. & Portell, R. W. (2007) First Report of Costacopluma (Decapoda: Brachyura: Retroplumidae) from the Eocene of Alabama, U. S. A. Journal of Crustacean Biology, 27, 90 - 96." type="journal article" year="2007">Feldmann & Portell 2007</bibRefCitation>
|
||
; see also
|
||
<bibRefCitation id="EFB34B6AFFBC141DFC7EF924FAA307FD" author="Vega, F. J. & Feldmann, R. M." box="[1016,1286,1744,1770]" pageId="5" pageNumber="298" pagination="133 - 152" refId="ref4810" refString="Vega, F. J. & Feldmann, R. M. (1992) Occurrence of Costacopluma (Decapoda: Brachyura: Retroplumidae) in the Maastrichtian of southern Mexico and its paleobiogeographic implications. Annals of Carnegie Museum, 61 (2), 133 - 152." type="journal article" year="1992">Vega & Feldmann 1992</bibRefCitation>
|
||
; Feldmann
|
||
<emphasis id="B956EA89FFBC141DFA0EF925FF110619" italics="true" pageId="5" pageNumber="298">et al.</emphasis>
|
||
1995; 2014). Furthermore,
|
||
<collectionCode id="ED33AE5EFFBC141DFE6BF900FDF80619" box="[493,605,1780,1806]" pageId="5" pageNumber="298">MACN-A</collectionCode>
|
||
12701 resembles
|
||
<taxonomicName id="4C224D18FFBC141DFCAFF900FE740625" authority="Feldmann, Rodriguez, Martinez & Aguirre-Urreta, 1997" authorityName="Feldmann, Rodriguez, Martinez & Aguirre-Urreta" authorityYear="1997" class="Malacostraca" family="Retroplumidae" genus="Costacopluma" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Arthropoda" rank="species" species="salamanca">
|
||
<emphasis id="B956EA89FFBC141DFCAFF900FBEE0619" box="[809,1099,1780,1806]" italics="true" pageId="5" pageNumber="298">Costacopluma salamanca</emphasis>
|
||
<bibRefCitation id="EFB34B6AFFBC141DFBD5F900FE740625" author="Feldmann, R. M. & Rodriguez, M. F. & Martinez, G. A. & Aguirre-Urreta, M." pageId="5" pageNumber="298" pagination="125 - 130" refId="ref4075" refString="Feldmann, R. M., Rodriguez, M. F., Martinez, G. A. & Aguirre-Urreta, M. (1997) Costacopluma salamanca new species (Decapoda, Retroplumidae) from the Salamanca Formation (Danian) of Patagonia, Argentina. Journal of Paleontology, 71 (1), 125 - 130." type="journal article" year="1997">Feldmann, Rodríguez, Martinez & Aguirre-Urreta, 1997</bibRefCitation>
|
||
</taxonomicName>
|
||
, in the presence of a combination of a subrectangular carapace with a narrow front and moderately wide posterior margin (
|
||
<bibRefCitation id="EFB34B6AFFBC141DFD9BF8C8FCA90641" author="Feldmann, R. M. & Rodriguez, M. F. & Martinez, G. A. & Aguirre-Urreta, M." box="[541,780,1852,1878]" pageId="5" pageNumber="298" pagination="125 - 130" refId="ref4075" refString="Feldmann, R. M., Rodriguez, M. F., Martinez, G. A. & Aguirre-Urreta, M. (1997) Costacopluma salamanca new species (Decapoda, Retroplumidae) from the Salamanca Formation (Danian) of Patagonia, Argentina. Journal of Paleontology, 71 (1), 125 - 130." type="journal article" year="1997">
|
||
Feldmann
|
||
<emphasis id="B956EA89FFBC141DFD13F8C9FD690641" box="[661,716,1852,1878]" italics="true" pageId="5" pageNumber="298">et al.</emphasis>
|
||
1997
|
||
</bibRefCitation>
|
||
;
|
||
<figureCitation id="13192A1EFFBC141DFC91F8C8FCD30641" box="[791,886,1852,1878]" captionStart="FIGURE 3" captionStartId="3.[151,250,1633,1658]" captionTargetBox="[355,1236,1321,1603]" captionTargetId="figure@3.[340,1247,1311,1609]" captionTargetPageId="3" captionText="FIGURE 3. A, Photograph of Platyacrodus unicus (holotype, MACN-A 12701), Río Chico, Chubut, Salamancan (Danian). B, Photograph and C, interpretative drawing of the retroplumid crab Costacopluma salamanca (holotype, Colección de Paleontología de la Facultad de Ciencias Exactas y Naturales de la Universidad de Buenos Aires 17376). Not to scale. B and C, modified from Feldmann et al. (1997)." httpUri="https://zenodo.org/record/3349479/files/figure.png" pageId="5" pageNumber="298">Figure 3</figureCitation>
|
||
). It is worth mentioning that
|
||
<taxonomicName id="4C224D18FFBC141DFB30F8C8FAEB0641" authorityName="Feldmann, Rodriguez, Martinez & Aguirre-Urreta" authorityYear="1997" box="[1206,1358,1852,1878]" class="Malacostraca" family="Retroplumidae" genus="Costacopluma" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Arthropoda" rank="species" species="salamanca">
|
||
<emphasis id="B956EA89FFBC141DFB30F8C8FAEB0641" box="[1206,1358,1852,1878]" italics="true" pageId="5" pageNumber="298">C. salamanca</emphasis>
|
||
</taxonomicName>
|
||
comes from approximately the same horizon and age than
|
||
<collectionCode id="ED33AE5EFFBC141DFD55F894FCE6066D" box="[723,835,1888,1914]" pageId="5" pageNumber="298">MACN-A</collectionCode>
|
||
12701. In sum, it is possible that
|
||
<taxonomicName id="4C224D18FFBC141DFB3EF894FA39066D" authorityName="Ameghino" authorityYear="1935" box="[1208,1436,1888,1914]" class="Malacostraca" family="Retroplumidae" genus="Platyacrodus" higherTaxonomySource="CoL" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Chordata" rank="species" species="unicus">
|
||
<emphasis id="B956EA89FFBC141DFB3EF894FA39066D" box="[1208,1436,1888,1914]" italics="true" pageId="5" pageNumber="298">Platyacrodus unicus</emphasis>
|
||
</taxonomicName>
|
||
may represent a senior synonym of
|
||
<taxonomicName id="4C224D18FFBC141DFDAFF870FCEE0689" authorityName="Feldmann, Rodriguez, Martinez & Aguirre-Urreta" authorityYear="1997" box="[553,843,1924,1950]" class="Malacostraca" family="Retroplumidae" genus="Costacopluma" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Arthropoda" rank="species" species="salamanca">
|
||
<emphasis id="B956EA89FFBC141DFDAFF870FCEE0689" box="[553,843,1924,1950]" italics="true" pageId="5" pageNumber="298">Costacopluma salamanca</emphasis>
|
||
</taxonomicName>
|
||
, and may be a valid taxon. However, this taxonomic interpretation should be tested by a more detailed taxonomic revision of fossil and recent taxa of the
|
||
<taxonomicName id="4C224D18FFBC141DFB7CF85CFA3906D5" authorityName="Collins & Morris" authorityYear="1975" box="[1274,1436,1960,1986]" class="Malacostraca" family="Retroplumidae" genus="Costacopluma" higherTaxonomySource="GBIF" kingdom="Animalia" order="Decapoda" pageId="5" pageNumber="298" phylum="Arthropoda" rank="genus">
|
||
<emphasis id="B956EA89FFBC141DFB7CF85CFA3906D5" box="[1274,1436,1960,1986]" italics="true" pageId="5" pageNumber="298">Costacopluma</emphasis>
|
||
</taxonomicName>
|
||
genus, which goes beyond the scope of the present contribution.
|
||
</paragraph>
|
||
</subSubSection>
|
||
</treatment>
|
||
</document> |