Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: Paleoclimatic Implications
A specimen of the aquatic reptile Champsosaurus sp. from the Paleocene Black Peaks Formation in southwestern Texas is the southernmost yet known. The fragmentary specimen exhibits some unusual features, such as a great anterior extent of the quadratojugal on the lower temporal arch, and cannot be at...
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| Veröffentlicht in: | Journal of paleontology 2010-03, Vol.84 (2), p.341-345 |
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| description | A specimen of the aquatic reptile Champsosaurus sp. from the Paleocene Black Peaks Formation in southwestern Texas is the southernmost yet known. The fragmentary specimen exhibits some unusual features, such as a great anterior extent of the quadratojugal on the lower temporal arch, and cannot be attributed with confidence to any of the named species. Champsosaurus appears to have been tolerant of temperate climates and had a northern latitudinal range exceeding that of crocodylians. It seems likely that the brief southward extension in range of Champsosaurus during early Paleocene time resulted from a decrease in mean annual temperature, comparable to over 10° of paleolatitude. |
| doi_str_mv | 10.1666/09-111R.1 |
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The fragmentary specimen exhibits some unusual features, such as a great anterior extent of the quadratojugal on the lower temporal arch, and cannot be attributed with confidence to any of the named species. Champsosaurus appears to have been tolerant of temperate climates and had a northern latitudinal range exceeding that of crocodylians. It seems likely that the brief southward extension in range of Champsosaurus during early Paleocene time resulted from a decrease in mean annual temperature, comparable to over 10° of paleolatitude.</description><identifier>ISSN: 0022-3360</identifier><identifier>EISSN: 1937-2337</identifier><identifier>DOI: 10.1666/09-111R.1</identifier><identifier>CODEN: JPALAZ</identifier><language>eng</language><publisher>New York, USA: Cambridge University Press</publisher><subject>Aquatic reptiles ; biogeography ; Black Peaks Formation ; Brewster County Texas ; Cenozoic ; Champsosauridae ; Champsosaurus ; Chordata ; Choristodera ; Diapsida ; Dinosaurs ; Endangered & extinct species ; Fauna ; Fossils ; Geology ; lower Paleocene ; Mandible ; morphology ; Museum exhibits ; Museums ; Paleocene ; Paleoclimatology ; Paleoecology ; Paleogene ; Paleolatitude ; PALEONTOLOGICAL NOTES ; Paleontology ; Reptiles ; Reptilia ; skeletons ; Teeth ; Temperature gradients ; Terlingua Ranch ; Tertiary ; Tetrapoda ; Texas ; United States ; Vertebrata ; vertebrate ; Vertebrates</subject><ispartof>Journal of paleontology, 2010-03, Vol.84 (2), p.341-345</ispartof><rights>The Paleontological Society</rights><rights>Copyright © The Paleontological Society</rights><rights>GeoRef, Copyright 2020, American Geosciences Institute. 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Abstract, Copyright, The Paleontological Society</rights><rights>2010 The Paleontological Society</rights><rights>Copyright Paleontological Society Mar 2010</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a470t-d04afb426af234f1b196c46d0bc5c1b6f0aae683aa8af812ffd00625bacf62b03</citedby><cites>FETCH-LOGICAL-a470t-d04afb426af234f1b196c46d0bc5c1b6f0aae683aa8af812ffd00625bacf62b03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://bioone.org/doi/pdf/10.1666/09-111R.1$$EPDF$$P50$$Gbioone$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/40605521$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,776,780,799,26955,27901,27902,52338,57992,58225</link.rule.ids></links><search><creatorcontrib>Lehman, Thomas M</creatorcontrib><creatorcontrib>Barnes, Ken</creatorcontrib><title>Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: Paleoclimatic Implications</title><title>Journal of paleontology</title><addtitle>J. Paleontol</addtitle><description>A specimen of the aquatic reptile Champsosaurus sp. from the Paleocene Black Peaks Formation in southwestern Texas is the southernmost yet known. The fragmentary specimen exhibits some unusual features, such as a great anterior extent of the quadratojugal on the lower temporal arch, and cannot be attributed with confidence to any of the named species. Champsosaurus appears to have been tolerant of temperate climates and had a northern latitudinal range exceeding that of crocodylians. It seems likely that the brief southward extension in range of Champsosaurus during early Paleocene time resulted from a decrease in mean annual temperature, comparable to over 10° of paleolatitude.</description><subject>Aquatic reptiles</subject><subject>biogeography</subject><subject>Black Peaks Formation</subject><subject>Brewster County Texas</subject><subject>Cenozoic</subject><subject>Champsosauridae</subject><subject>Champsosaurus</subject><subject>Chordata</subject><subject>Choristodera</subject><subject>Diapsida</subject><subject>Dinosaurs</subject><subject>Endangered & extinct species</subject><subject>Fauna</subject><subject>Fossils</subject><subject>Geology</subject><subject>lower Paleocene</subject><subject>Mandible</subject><subject>morphology</subject><subject>Museum exhibits</subject><subject>Museums</subject><subject>Paleocene</subject><subject>Paleoclimatology</subject><subject>Paleoecology</subject><subject>Paleogene</subject><subject>Paleolatitude</subject><subject>PALEONTOLOGICAL NOTES</subject><subject>Paleontology</subject><subject>Reptiles</subject><subject>Reptilia</subject><subject>skeletons</subject><subject>Teeth</subject><subject>Temperature gradients</subject><subject>Terlingua Ranch</subject><subject>Tertiary</subject><subject>Tetrapoda</subject><subject>Texas</subject><subject>United States</subject><subject>Vertebrata</subject><subject>vertebrate</subject><subject>Vertebrates</subject><issn>0022-3360</issn><issn>1937-2337</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp9kd-L1DAQx4MouK4--AcIxRfvkJ4zSZu29yZ7_jg4UOTExzBNk9ssbVOTFr3_3qy7eCJyTzMwH-b7ne8w9hzhDKWUb6DJEfHLGT5gK2xElXMhqodsBcB5LoSEx-xJjDsA5BJxxfRmS8MUfaQlLDE7uXA0RdfRebbZ-uDi7DsT6DSzwQ_ZvDXZZ-qN12Y0mbfZNxPn7Nr8pHh-HPRuoNnp7HKYeqdT68f4lD2y1Efz7FjX7Ov7d9ebj_nVpw-Xm7dXORUVzHkHBdm24JIsF4XFFhupC9lBq0uNrbRAZGQtiGqyNXJrOwDJy5a0lbwFsWavDnun4L8vyZoaXNSm72k0fomqlk0pm4pjIk_uJbEqRSFTckVCX_6D7vwSxnSH4gI51JC4NTs9QDr4GIOxagopiHCrENT-Lwoatf-L2mu_OLC7FG74AxYgoSx_e3t9mN8YH7UzozY_fOi7v3QhbQVeQQN3tKahDa67MXfc_7SPCbXO-9Hc4_IXsNCyOw</recordid><startdate>201003</startdate><enddate>201003</enddate><creator>Lehman, Thomas M</creator><creator>Barnes, Ken</creator><general>Cambridge University Press</general><general>Paleontological Society</general><general>The Paleontological Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>4T-</scope><scope>4U-</scope><scope>7SN</scope><scope>7TN</scope><scope>7XB</scope><scope>88A</scope><scope>88I</scope><scope>8AF</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H95</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>LK8</scope><scope>M2O</scope><scope>M2P</scope><scope>M7P</scope><scope>MBDVC</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>R05</scope><scope>S0X</scope><scope>H96</scope></search><sort><creationdate>201003</creationdate><title>Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: Paleoclimatic Implications</title><author>Lehman, Thomas M ; Barnes, Ken</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a470t-d04afb426af234f1b196c46d0bc5c1b6f0aae683aa8af812ffd00625bacf62b03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Aquatic reptiles</topic><topic>biogeography</topic><topic>Black Peaks Formation</topic><topic>Brewster County Texas</topic><topic>Cenozoic</topic><topic>Champsosauridae</topic><topic>Champsosaurus</topic><topic>Chordata</topic><topic>Choristodera</topic><topic>Diapsida</topic><topic>Dinosaurs</topic><topic>Endangered & extinct species</topic><topic>Fauna</topic><topic>Fossils</topic><topic>Geology</topic><topic>lower Paleocene</topic><topic>Mandible</topic><topic>morphology</topic><topic>Museum exhibits</topic><topic>Museums</topic><topic>Paleocene</topic><topic>Paleoclimatology</topic><topic>Paleoecology</topic><topic>Paleogene</topic><topic>Paleolatitude</topic><topic>PALEONTOLOGICAL NOTES</topic><topic>Paleontology</topic><topic>Reptiles</topic><topic>Reptilia</topic><topic>skeletons</topic><topic>Teeth</topic><topic>Temperature gradients</topic><topic>Terlingua Ranch</topic><topic>Tertiary</topic><topic>Tetrapoda</topic><topic>Texas</topic><topic>United States</topic><topic>Vertebrata</topic><topic>vertebrate</topic><topic>Vertebrates</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lehman, Thomas M</creatorcontrib><creatorcontrib>Barnes, Ken</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Docstoc</collection><collection>University Readers</collection><collection>Ecology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Biology Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>eLibrary</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Biological Science Collection</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Biological Science Database</collection><collection>Research Library (Corporate)</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>University of Michigan</collection><collection>SIRS Editorial</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><jtitle>Journal of paleontology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lehman, Thomas M</au><au>Barnes, Ken</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: Paleoclimatic Implications</atitle><jtitle>Journal of paleontology</jtitle><addtitle>J. Paleontol</addtitle><date>2010-03</date><risdate>2010</risdate><volume>84</volume><issue>2</issue><spage>341</spage><epage>345</epage><pages>341-345</pages><issn>0022-3360</issn><eissn>1937-2337</eissn><coden>JPALAZ</coden><abstract>A specimen of the aquatic reptile Champsosaurus sp. from the Paleocene Black Peaks Formation in southwestern Texas is the southernmost yet known. The fragmentary specimen exhibits some unusual features, such as a great anterior extent of the quadratojugal on the lower temporal arch, and cannot be attributed with confidence to any of the named species. Champsosaurus appears to have been tolerant of temperate climates and had a northern latitudinal range exceeding that of crocodylians. It seems likely that the brief southward extension in range of Champsosaurus during early Paleocene time resulted from a decrease in mean annual temperature, comparable to over 10° of paleolatitude.</abstract><cop>New York, USA</cop><pub>Cambridge University Press</pub><doi>10.1666/09-111R.1</doi><tpages>5</tpages></addata></record> |
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| ispartof | Journal of paleontology, 2010-03, Vol.84 (2), p.341-345 |
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| source | Jstor Complete Legacy; BioOne Complete |
| subjects | Aquatic reptiles biogeography Black Peaks Formation Brewster County Texas Cenozoic Champsosauridae Champsosaurus Chordata Choristodera Diapsida Dinosaurs Endangered & extinct species Fauna Fossils Geology lower Paleocene Mandible morphology Museum exhibits Museums Paleocene Paleoclimatology Paleoecology Paleogene Paleolatitude PALEONTOLOGICAL NOTES Paleontology Reptiles Reptilia skeletons Teeth Temperature gradients Terlingua Ranch Tertiary Tetrapoda Texas United States Vertebrata vertebrate Vertebrates |
| title | Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: Paleoclimatic Implications |
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