Geochronological and Taxonomic Revisions of the Middle Eocene Whistler Squat Quarry (Devil’s Graveyard Formation, Texas) and Implications for the Early Uintan in Trans-Pecos Texas
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{"title"=>"Geochronological and taxonomic revisions of the middle eocene whistler squat quarry (devil's graveyard formation, Texas) and implications for the early Uintan in Trans-Pecos Texas", "type"=>"journal", "authors"=>[{"first_name"=>"Christopher J.", "last_name"=>"Campisano", "scopus_author_id"=>"22952834500"}, {"first_name"=>"E. Christopher", "last_name"=>"Kirk", "scopus_author_id"=>"35215365400"}, {"first_name"=>"K. E.Beth", "last_name"=>"Townsend", "scopus_author_id"=>"24072100500"}, {"first_name"=>"Alan L.", "last_name"=>"Deino", "scopus_author_id"=>"35571657200"}], "year"=>2014, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"373459916", "doi"=>"10.1371/journal.pone.0101516", "isbn"=>"1932-6203", "pmid"=>"24988115", "issn"=>"19326203", "scopus"=>"2-s2.0-84903758594", "sgr"=>"84903758594"}, "id"=>"11832f2c-8993-359d-9934-4973cdf46043", "abstract"=>"The Whistler Squat Quarry (TMM 41372) of the lower Devil's Graveyard Formation in Trans-Pecos Texas is a middle Eocene fossil locality attributed to Uintan biochronological zone Ui1b. Specimens from the Whistler Squat Quarry were collected immediately above a volcanic tuff with prior K/Ar ages ranging from ,47–50 Ma and below a tuff previously dated to ,44 Ma. New 40 Ar/ 39 Ar analyses of both of the original tuff samples provide statistically indistinguishable ages of 44.8860.04 Ma for the lower tuff and 45.0460.10 Ma for the upper tuff. These dates are compatible with magnetically reversed sediments at the site attributable to C20r (43.505–45.942 Ma) and a stratigraphic position above a basalt dated to 46.80 Ma. Our reanalysis of mammalian specimens from the Whistler Squat Quarry and a stratigraphically equivalent locality significantly revises their faunal lists, confirms the early Uintan designation for the sites, and highlights several biogeographic and biochronological differences when compared to stratotypes in the Bridger and Uinta Formations. Previous suggestions of regional endemism in the early Uintan are supported by the recognition of six endemic taxa (26% of mammalian taxa) from the Whistler Squat Quarry alone, including three new taxa. The revised faunal list for the Whistler Squat Quarry also extends the biostratigraphic ranges of nine non-endemic mammalian taxa to Ui1b.", "link"=>"http://www.mendeley.com/research/geochronological-taxonomic-revisions-middle-eocene-whistler-squat-quarry-devils-graveyard-formation", "reader_count"=>6, "reader_count_by_academic_status"=>{"Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>1, "Student > Master"=>3, "Other"=>1}, "reader_count_by_user_role"=>{"Student > Doctoral Student"=>1, "Student > Ph. D. Student"=>1, "Student > Master"=>3, "Other"=>1}, "reader_count_by_subject_area"=>{"Agricultural and Biological Sciences"=>2, "Medicine and Dentistry"=>2, "Earth and Planetary Sciences"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>2}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>2}}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/1577826"], "description"=>"<p><b>A</b>, <i>Hyopsodus</i> sp., right M2 (TMM 41372-227), occlusal view; <b>B–C</b>, <i>Helohyus</i> sp., left m1/2 (TMM 41446-12), buccal view (B) and occlusal view (C).</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "dental", "specimens", "whistler", "squat"], "article_id"=>1091584, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g009", "stats"=>{"downloads"=>1, "page_views"=>15, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_dental_specimens_from_the_Whistler_Squat_local_fauna_/1091584", "title"=>"Select dental specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577843"], "description"=>"<p><b>A</b>, left maxilla with C–P3, M1–3 (TMM 41372-175), occlusal view; <b>B</b>, left mandible with dp2–dp4, m1–m2 (TMM 41372-176), oblique occlusal view and <b>C</b>, buccal view; <b>D</b>, right mandible with p2–m3 (TMM 41372-178), oblique occlusal view and <b>E</b>, lingual view.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "specimens", "whistler", "squat"], "article_id"=>1091589, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g010", "stats"=>{"downloads"=>1, "page_views"=>21, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_Leptoreodon_marshi_specimens_from_the_Whistler_Squat_local_fauna_/1091589", "title"=>"Select <i>Leptoreodon marshi</i> specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577853"], "description"=>"<p><b>A</b>, <i>Leptoreodon major</i>, partial right maxilla with M1 crown base and M2-M3 (TMM 41466-2), occlusal view; <b>B–C</b>, <i>Protitanotherium emarginatum</i>, (B) right p2 (TMM 41372-536), occlusal view, (C) left M2 (TMM 41466-6), occlusal view; <b>D</b>, Equidae gen. et sp. indet., right astragalus (TMM 41372-204), superior view.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "specimens", "whistler", "squat"], "article_id"=>1091597, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g011", "stats"=>{"downloads"=>2, "page_views"=>15, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_specimens_from_the_Whistler_Squat_local_fauna_/1091597", "title"=>"Select specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577797"], "description"=>"<p>WSQ = Whistler Squat Quarry; JCT = Junction locality; AF = Agua Fria Mountain; HE = Hen Egg Mountain; DB = Devil’s Graveyard basalt; DM = Dogie Mountain.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "graveyard"], "article_id"=>1091555, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g001", "stats"=>{"downloads"=>1, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Satellite_image_of_the_Devil_8217_s_Graveyard_Formation_study_area_and_surrounding_region_/1091555", "title"=>"Satellite image of the Devil’s Graveyard Formation study area and surrounding region.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577868"], "description"=>"<p><b>A</b>, partial left maxilla with C–M3 (TMM 41372-45), occlusal view; <b>B</b>, partial left maxilla with P4–M3 (TMM 41372-72), occlusal view; <b>C</b>, partial left mandible with p3–m3 (TMM 41372-99), buccal view and <b>D</b>, occlusal view.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "specimens", "whistler", "squat"], "article_id"=>1091609, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g012", "stats"=>{"downloads"=>2, "page_views"=>27, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_Amynodon_advenus_specimens_from_the_Whistler_Squat_local_fauna_/1091609", "title"=>"Select <i>Amynodon advenus</i> specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577799"], "description"=>"<p>Sample numbers for dated horizons are in parentheses. The 1980s K/Ar age for sample B-5367 of 42.7±1.6 Ma <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Stevens1\" target=\"_blank\">[8]</a>, <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Henry2\" target=\"_blank\">[14]</a> has been assumed to be erroneously old by others (e.g., <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Prothero1\" target=\"_blank\">[96]</a>) and is being redated. Locality numbers: Hen Egg Mountain (TMM 42028, TMM 42287); 0.6 miles east of Junction (TMM 41444); Junction (TMM 41443); Boneanza (TMM 41747); Wax Camp (TMM 41576); Whistler Squat Quarry (TMM 41372); 300 yd east of Whistler Squat Quarry (TMM 41466); Titanothere Hill (TMM 41723); Serendipity (41745); Purple Bench (TMM 41672); Tepee Canyon (TMM 41578); Above Skyline (TMM 41580); Dalquest’s Canyon (TMM 41715).</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "biochronology", "radiometric", "ages", "graveyard", "agua", "fria", "hen"], "article_id"=>1091557, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g002", "stats"=>{"downloads"=>7, "page_views"=>110, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Lithostratigraphy_biochronology_and_radiometric_ages_of_the_Devil_8217_s_Graveyard_Formation_in_the_Agua_Fria_and_Hen_Egg_Mountain_region_/1091557", "title"=>"Lithostratigraphy, biochronology and radiometric ages of the Devil’s Graveyard Formation in the Agua Fria and Hen Egg Mountain region.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577876"], "description"=>"<p><b>A-B</b>, <i>Sinopa major</i>, partial left mandible with m1–m2 (TMM 41466-9), buccal view (A) and occlusal view (B); <b>C–E</b>, Miacidae gen. et sp. indet., partial left P4 (TMM 41372-389), lingual view (C), buccal view (D), and occlusal view (E); <b>F–H</b>, <i>Miocyon</i> sp., left p4 (TMM 41372-367), buccal view (F), lingual view (G), and occlusal view (H).</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "dental", "specimens", "whistler", "squat"], "article_id"=>1091617, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g013", "stats"=>{"downloads"=>0, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_dental_specimens_from_the_Whistler_Squat_local_fauna_/1091617", "title"=>"Select dental specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577877"], "description"=>"<p>Mammalian taxa identified from Whistler Squat local fauna localities TMM-41372 and TMM-41466 and their Bridgerian (Br) and Uintan (Ui) biochronological zone ranges based on Wilson <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Wilson1\" target=\"_blank\">[7]</a>, Wilson and Runkel <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Wood2\" target=\"_blank\">[51]</a>, Walton <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Walton3\" target=\"_blank\">[60]</a>, Williams and Kirk <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Williams1\" target=\"_blank\">[12]</a>, Robinson <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Robinson1\" target=\"_blank\">[1]</a>, Gunnell et al. <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Gunnell1\" target=\"_blank\">[2]</a>, and this study. Gray bars indicate range extension of non-endemic taxa compared to Robinson et al. <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Robinson1\" target=\"_blank\">[1]</a> and Gunnell et al. <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516-Gunnell1\" target=\"_blank\">[2]</a>. <sup>1</sup><i>Herpetotherium</i> species candidates range throughout the Bridgerian and Uintan, <sup>2</sup>Range listed is for <i>S. edenensis</i>, <sup>3</sup>Endemic species, but extends LRD of genus from Ui3. <sup>4</sup>Endemic species, but extends HRD of genus from Ui1a. <sup>5</sup>Range is genus/species specific. <sup>6</sup>Extends LRD of genus from Ui2.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "squat", "faunal", "bridgerian", "uintan", "biochronological"], "article_id"=>1091618, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g014", "stats"=>{"downloads"=>0, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Whistler_Squat_faunal_list_and_associated_Bridgerian_and_Uintan_biochronological_zone_ranges_/1091618", "title"=>"Whistler Squat faunal list and associated Bridgerian and Uintan biochronological zone ranges.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577878"], "description"=>"1<p>Includes error in <i>J</i>, the neutron fluence parameter.</p><p>MSWD = Mean Square Weighted Deviation.</p><p>Complete analytical data provided in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516.s001\" target=\"_blank\">Table S1</a>.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "single-crystal", "total-fusion", "analytical", "jw-1", "sanidine"], "article_id"=>1091619, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.t001", "stats"=>{"downloads"=>4, "page_views"=>9, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Summary_single_crystal_total_fusion_40_Ar_39_Ar_analytical_results_for_JW_1_sanidine_phenocrysts_/1091619", "title"=>"Summary single-crystal total-fusion <sup>40</sup>Ar/<sup>39</sup>Ar analytical results for JW-1 sanidine phenocrysts.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577879"], "description"=>"1<p>Excludes error in <i>J</i>, the neutron fluence parameter, except as noted.</p>2<p>Includes error in <i>J.</i></p><p><i>n/n<sub>tot</sub></i> = steps used to calculate age/steps yielding >2% of the total 39Ar released.</p><p>MSWD = Mean Square Weighted Deviation.</p><p>Complete analytical data provided in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516.s001\" target=\"_blank\">Table S1</a>.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "single-crystal", "incremental-heating", "analytical", "jw-2", "biotite"], "article_id"=>1091620, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.t002", "stats"=>{"downloads"=>6, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Summary_single_crystal_incremental_heating_40_Ar_39_Ar_analytical_results_for_JW_2_biotite_phenocrysts_/1091620", "title"=>"Summary single-crystal incremental-heating <sup>40</sup>Ar/<sup>39</sup>Ar analytical results for JW-2 biotite phenocrysts.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577880"], "description"=>"<div><p>The Whistler Squat Quarry (TMM 41372) of the lower Devil’s Graveyard Formation in Trans-Pecos Texas is a middle Eocene fossil locality attributed to Uintan biochronological zone Ui1b. Specimens from the Whistler Squat Quarry were collected immediately above a volcanic tuff with prior K/Ar ages ranging from ∼47–50 Ma and below a tuff previously dated to ∼44 Ma. New <sup>40</sup>Ar/<sup>39</sup>Ar analyses of both of the original tuff samples provide statistically indistinguishable ages of 44.88±0.04 Ma for the lower tuff and 45.04±0.10 Ma for the upper tuff. These dates are compatible with magnetically reversed sediments at the site attributable to C20r (43.505–45.942 Ma) and a stratigraphic position above a basalt dated to 46.80 Ma. Our reanalysis of mammalian specimens from the Whistler Squat Quarry and a stratigraphically equivalent locality significantly revises their faunal lists, confirms the early Uintan designation for the sites, and highlights several biogeographic and biochronological differences when compared to stratotypes in the Bridger and Uinta Formations. Previous suggestions of regional endemism in the early Uintan are supported by the recognition of six endemic taxa (26% of mammalian taxa) from the Whistler Squat Quarry alone, including three new taxa. The revised faunal list for the Whistler Squat Quarry also extends the biostratigraphic ranges of nine non-endemic mammalian taxa to Ui1b.</p></div>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "taxonomic", "revisions", "eocene", "whistler", "squat", "quarry", "graveyard", "implications", "uintan", "trans-pecos"], "article_id"=>1091621, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516", "stats"=>{"downloads"=>0, "page_views"=>25, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Geochronological_and_Taxonomic_Revisions_of_the_Middle_Eocene_Whistler_Squat_Quarry_Devil_8217_s_Graveyard_Formation_Texas_and_Implications_for_the_Early_Uintan_in_Trans_Pecos_Texas_/1091621", "title"=>"Geochronological and Taxonomic Revisions of the Middle Eocene Whistler Squat Quarry (Devil’s Graveyard Formation, Texas) and Implications for the Early Uintan in Trans-Pecos Texas", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577811"], "description"=>"<p>From the archives of the Vertebrate Paleontology Laboratory and courtesy of Sarah Wilson. <b>A</b>, 1970 aerial view of the locality prior to any significant quarrying with key features marked; <b>B</b>, excavation at the quarry, July 1971; <b>C</b>, close-up of the ∼20 cm fossiliferous horizon immediately overlying the Quarry Tuff, August 1971.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "whistler", "squat", "quarry"], "article_id"=>1091569, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g003", "stats"=>{"downloads"=>2, "page_views"=>17, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Photos_of_the_Whistler_Squat_Quarry_locality_/1091569", "title"=>"Photos of the Whistler Squat Quarry locality.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577812"], "description"=>"<p>Age-probability density function and weighted-mean age of the <sup>40</sup>Ar/<sup>39</sup>Ar single-crystal total-fusion (SCTF) analyses of individual sanidine phenocrysts from sample JW-1. Complete analytical data provided in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516.s001\" target=\"_blank\">Table S1</a>.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "jw-1"], "article_id"=>1091570, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g004", "stats"=>{"downloads"=>0, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_40_Ar_39_Ar_age_distribution_of_JW_1_phenocrysts_/1091570", "title"=>"<sup>40</sup>Ar/<sup>39</sup>Ar age distribution of JW-1 phenocrysts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577813"], "description"=>"<p>Spectra derived from <sup>40</sup>Ar/<sup>39</sup>Ar single-crystal incremental-heating (SCIH) analyses of individual biotite phenocrysts from sample JW-2. Excludes steps yielding less than 2% of the total <sup>39</sup>Ar released. Complete analytical data provided in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516.s001\" target=\"_blank\">Table S1</a>.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "incremental", "heating", "spectra", "jw-2"], "article_id"=>1091571, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g005", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_40_Ar_39_Ar_incremental_heating_spectra_of_JW_2_phenocrysts_/1091571", "title"=>"<sup>40</sup>Ar/<sup>39</sup>Ar incremental heating spectra of JW-2 phenocrysts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577814"], "description"=>"<p>Age-probability density function and weighted-mean age of the plateau ages from the single-grain biotite <sup>40</sup>Ar/<sup>39</sup>Ar SCIH analyses. Complete analytical data provided in <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0101516#pone.0101516.s001\" target=\"_blank\">Table S1</a>.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "jw-2"], "article_id"=>1091572, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g006", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_40_Ar_39_Ar_age_distribution_of_JW_2_phenocrysts_/1091572", "title"=>"<sup>40</sup>Ar/<sup>39</sup>Ar age distribution of JW-2 phenocrysts.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577821"], "description"=>"<p><b>A–B</b>, <i>Herpetotherium</i> sp., left m1/2 (TMM 41372-403), lingual view (A) and occlusal view (B); <b>C</b>, <i>Scenopagus</i> cf. <i>S. edenensis</i>, right mandibular molar (TMM 41372-118), occlusal view; <b>D</b>, <i>Microsyops annectens</i>, partial right maxilla with P4-M3 (TMM 41466-7), occlusal view; <b>E</b>, <i>Ourayia uintensis</i>, right m2 trigonid (TMM 41372-301), occlusal view.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "dental", "specimens", "whistler", "squat"], "article_id"=>1091579, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g007", "stats"=>{"downloads"=>1, "page_views"=>11, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_dental_specimens_from_the_Whistler_Squat_local_fauna_/1091579", "title"=>"Select dental specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}
  • {"files"=>["https://ndownloader.figshare.com/files/1577824"], "description"=>"<p><b>A–H</b>, <i>Thisbemys plicatus</i>, (A) right m1 (TMM 41372-25), (B) right M3 (TMM 41372-56), (C) left M3 (TMM 41372-129), (D) right P4 (TMM 41372-270), (E) left m3 (TMM 41372-130), (F) right m2 (TMM 41372-131), (G) left m3 (TMM 41372-117), (H) left M2 (TMM 41372-135); <b>I–J</b>, <i>Microparamys minutus</i>, (I) right p4 (TMM 41372-298); <b>J</b>, left m1/2 (TMM 41372-260); <b>K</b>, Microparamyinae gen. et sp. indet., left m3 (TMM 41372-286); <b>L–S</b>, <i>Mysops boskeyi,</i> (L) left M1 (TMM 41372-141), (M) left m2 (TMM 41372-250), (N) left m3 (TMM 41372-253), (O) right m3 (TMM 41372-258), (P) left M2 (TMM 41372-290), (Q) right M1 (TMM 41372-307), (R) left M1 (TMM 41372-144), (S) right m1 (TMM 41372-293); <b>T–Y</b>, <i>Prolapsus sibilatoris</i>, (T) partial right mandible with m1–3, holotype (TMM 41372-179), (U) left M1 (TMM 41372-300), (V) left M1 (TMM 41372-256), (W) right M1 (TMM 41372-285), (X) right m1 (TMM 41372-291), (Y) right m3 (TMM 41372-265); <b>Z</b>, <i>Pauromys texensis</i>, right M2 (TMM 41372-279). All occlusal views.</p>", "links"=>[], "tags"=>["biogeography", "Evolutionary biology", "Evolutionary systematics", "Paleontology", "paleobiology", "Paleozoology", "Vertebrate paleontology", "Biostratigraphy", "taxonomy", "Animal taxonomy", "geology", "Geochronology", "geochemistry", "rodent", "dental", "specimens", "whistler", "squat"], "article_id"=>1091582, "categories"=>["Biological Sciences"], "users"=>["Christopher J. Campisano", "E. Christopher Kirk", "K. E. Beth Townsend", "Alan L. Deino"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0101516.g008", "stats"=>{"downloads"=>1, "page_views"=>15, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Select_rodent_dental_specimens_from_the_Whistler_Squat_local_fauna_/1091582", "title"=>"Select rodent dental specimens from the Whistler Squat local fauna.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-07-02 02:44:21"}

PMC Usage Stats | Further Information

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