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Mendeley | Further Information

{"title"=>"Multivariate Analyses of Small Theropod Dinosaur Teeth and Implications for Paleoecological Turnover through Time", "type"=>"journal", "authors"=>[{"first_name"=>"Derek W.", "last_name"=>"Larson", "scopus_author_id"=>"12786588600"}, {"first_name"=>"Philip J.", "last_name"=>"Currie", "scopus_author_id"=>"7102466259"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"368176387", "sgr"=>"84872784978", "issn"=>"19326203", "pmid"=>"23372708", "scopus"=>"2-s2.0-84872784978", "doi"=>"10.1371/journal.pone.0054329", "isbn"=>"1932-6203"}, "id"=>"d1b9841b-79d4-3417-8906-65b4d7ca7b38", "abstract"=>"Isolated small theropod teeth are abundant in vertebrate microfossil assemblages, and are frequently used in studies of species diversity in ancient ecosystems. However, determining the taxonomic affinities of these teeth is problematic due to an absence of associated diagnostic skeletal material. Species such as Dromaeosaurus albertensis, Richardoestesia gilmorei, and Saurornitholestes langstoni are known from skeletal remains that have been recovered exclusively from the Dinosaur Park Formation (Campanian). It is therefore likely that teeth from different formations widely disparate in age or geographic position are not referable to these species. Tooth taxa without any associated skeletal material, such as Paronychodon lacustris and Richardoestesia isosceles, have also been identified from multiple localities of disparate ages throughout the Late Cretaceous. To address this problem, a dataset of measurements of 1183 small theropod teeth (the most specimen-rich theropod tooth dataset ever constructed) from North America ranging in age from Santonian through Maastrichtian were analyzed using multivariate statistical methods: canonical variate analysis, pairwise discriminant function analysis, and multivariate analysis of variance. The results indicate that teeth referred to the same taxon from different formations are often quantitatively distinct. In contrast, isolated teeth found in time equivalent formations are not quantitatively distinguishable from each other. These results support the hypothesis that small theropod taxa, like other dinosaurs in the Late Cretaceous, tend to be exclusive to discrete host formations. The methods outlined have great potential for future studies of isolated teeth worldwide, and may be the most useful non-destructive technique known of extracting the most data possible from isolated and fragmentary specimens. The ability to accurately assess species diversity and turnover through time based on isolated teeth will help illuminate patterns of evolution and extinction in these groups and potentially others in greater detail than has previously been thought possible without more complete skeletal material.", "link"=>"http://www.mendeley.com/research/multivariate-analyses-small-theropod-dinosaur-teeth-implications-paleoecological-turnover-through-ti", "reader_count"=>80, "reader_count_by_academic_status"=>{"Unspecified"=>4, "Professor > Associate Professor"=>2, "Librarian"=>2, "Student > Doctoral Student"=>5, "Researcher"=>10, "Student > Ph. D. Student"=>18, "Student > Postgraduate"=>2, "Other"=>4, "Student > Master"=>12, "Student > Bachelor"=>19, "Lecturer > Senior Lecturer"=>1, "Professor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>4, "Professor > Associate Professor"=>2, "Librarian"=>2, "Student > Doctoral Student"=>5, "Researcher"=>10, "Student > Ph. D. Student"=>18, "Student > Postgraduate"=>2, "Other"=>4, "Student > Master"=>12, "Student > Bachelor"=>19, "Lecturer > Senior Lecturer"=>1, "Professor"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>4, "Engineering"=>2, "Environmental Science"=>1, "Biochemistry, Genetics and Molecular Biology"=>1, "Agricultural and Biological Sciences"=>32, "Chemistry"=>1, "Computer Science"=>2, "Earth and Planetary Sciences"=>36, "Linguistics"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>2}, "Chemistry"=>{"Chemistry"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>36}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>32}, "Computer Science"=>{"Computer Science"=>2}, "Linguistics"=>{"Linguistics"=>1}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>1}, "Unspecified"=>{"Unspecified"=>4}, "Environmental Science"=>{"Environmental Science"=>1}}, "reader_count_by_country"=>{"Canada"=>2, "Sweden"=>1, "United States"=>2, "Japan"=>1, "Brazil"=>1, "United Kingdom"=>1, "Chile"=>1, "Spain"=>1}, "group_count"=>1}

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• http://doi.org/10.1111/pala.12512
• http://doi.org/10.1080/08912963.2019.1609957
• http://doi.org/10.1098/rsos.191206
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• http://doi.org/10.1002/ar.24241
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• http://doi.org/10.1139/cjes-2020-0169
• http://doi.org/10.1017/jpa.2018.42
• http://doi.org/10.1016/j.palaeo.2020.109704
• http://doi.org/10.1007/s12549-015-0188-x
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• http://doi.org/10.1080/08912963.2017.1333609
• http://doi.org/10.1016/j.cretres.2019.104312

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• {"type"=>"COMMENT", "annotationUri"=>"info:doi/10.1371/annotation/74d29b4b-ede6-4e63-a891-299109f5331e", "title"=>"Media Coverage of This Article", "body"=>"The following article represents some of the media coverage that has occurred for this paper:\n\nPublication: Daily News and Analysis \nTitle: “23 small meat-eating dino species identified - World - DNA”\nhttp://www.dnaindia.com/world/report_23-small-meat-eating-dino-species-identified_1792223\n\nPublication: PLoS Blogs \nTitle: “And This is Why We Should Always Provide Our Data. . . | The Integrative Paleontologists”\nhttp://blogs.plos.org/paleo/2013/01/25/and-this-is-why-we-should-always-provide-our-data/\n\nPublication: Sci News.com \nTitle: “Teeth Study Reveals Diversity of Small Dinosaurs in Cretaceous North America | Paleontology | Sci-News.com”\nhttp://www.sci-news.com/paleontology/article00846.html\n\nPublication: Science 2.0 \nTitle: “North American Small Carnivorous Dinosaur Species Now Up To 23”\nhttp://www.science20.com/news_articles/north_american_small_carnivorous_dinosaur_species_now_23-101691\n\nPublication: The Times of India \nTitle: “23 small meat-eating dino species identified - The Times of India”\nhttp://timesofindia.indiatimes.com/home/science/23-small-meat-eating-dino-species-identified/articleshow/18168953.cms\n\nIf you see any additional coverage of this paper in the press or blogosphere, please reply to this thread and add the link to the article. ", "isRemoved"=>false, "created"=>"2013-01-25T23:37:52Z", "lastModified"=>"2013-01-25T23:37:52Z", "creator"=>{"userId"=>"80539"}, "highlightedText"=>"", "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>true, "body"=>"PLOS ONE Staff"}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pone.0054329", "state"=>"published", "journals"=>{"PLoSONE"=>{"journalKey"=>"PLoSONE", "eIssn"=>"1932-6203", "title"=>"PLOS ONE"}}}, "replyTreeSize"=>2, "mostRecentActivity"=>"2013-02-19T17:21:49Z", "replies"=>[{"type"=>"REPLY", "parentID"=>60739, "annotationUri"=>"info:doi/10.1371/reply/0c278294-5af7-4788-84b3-d787cc70513e", "title"=>"RE: Media Coverage of This Article", "body"=>"The following article represents some of the media coverage that has occurred for this paper:\n\nPublication: The Shaunavon Standard \nTitle: “Former Shaunavon High student involved in new dinosaur discovery”\nhttp://www.theshaunavonstandard.com/news/local-news/850.html\n\nPublication: PLoS Blogs \nTitle: “And This is Why We Should Always Provide Our Data. . .”\nhttp://blogs.plos.org/paleo/2013/01/25/and-this-is-why-we-should-always-provide-our-data/\n\nPublication: Sci News.com \nTitle: “Teeth Study Reveals Diversity of Small Dinosaurs in Cretaceous North America”\nhttp://www.sci-news.com/paleontology/article00846.html\n\nPublication: Daily News and Analysis \nTitle: “23 small meat-eating dino species identified - World - DNA”\nhttp://www.dnaindia.com/world/report_23-small-meat-eating-dino-species-identified_1792223\n\nPublication: The Times of India \nTitle: “23 small meat-eating dino species identified - The Times of India”\nhttp://timesofindia.indiatimes.com/home/science/23-small-meat-eating-dino-species-identified/articleshow/18168953.cms\n\nPublication: Science 2.0 \nTitle: “North American Small Carnivorous Dinosaur Species Now Up To 23”\nhttp://www.science20.com/news_articles/north_american_small_carnivorous_dinosaur_species_now_23-101691\n\nIf you see any additional coverage of this paper in the press or blogosphere, please reply to this thread and add the link to the article.\n", "isRemoved"=>false, "created"=>"2013-02-01T23:22:25Z", "lastModified"=>"2013-02-01T23:22:25Z", "creator"=>{"userId"=>"80539"}, "highlightedText"=>"", "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>true, "body"=>"PLOS One Staff"}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pone.0054329", "state"=>"published", "journals"=>{"PLoSONE"=>{"journalKey"=>"PLoSONE", "eIssn"=>"1932-6203", "title"=>"PLOS ONE"}}}, "replyTreeSize"=>1, "mostRecentActivity"=>"2013-02-19T17:21:49Z", "replies"=>[{"type"=>"REPLY", "parentID"=>61087, "annotationUri"=>"info:doi/10.1371/reply/d74dd982-42a4-409e-a2bf-e270564d20e5", "title"=>"RE: RE: Media Coverage of This Article", "body"=>"The following article represents some of the media coverage that has occurred for this paper:\n\nPublication: European Geosciences Union \nTitle: “Theropod dinosaurs were waaay more diverse than previously thought | Green Tea and Velociraptors”\nhttp://blogs.egu.eu/palaeoblog/2013/02/12/dinosaurs-were-waaay-more-diverse-than-previously-thought/\n\nIf you see any additional coverage of this paper in the press or blogosphere, please reply to this thread and add the link to the article. \n", "isRemoved"=>false, "created"=>"2013-02-19T17:21:49Z", "lastModified"=>"2013-02-19T17:21:49Z", "creator"=>{"userId"=>"80539"}, "highlightedText"=>"", "competingInterestStatement"=>{"creatorWasPrompted"=>true, "hasCompetingInterests"=>true, "body"=>"PLOS One Staff"}, "parentArticle"=>{"doi"=>"info:doi/10.1371/journal.pone.0054329", "state"=>"published", "journals"=>{"PLoSONE"=>{"journalKey"=>"PLoSONE", "eIssn"=>"1932-6203", "title"=>"PLOS ONE"}}}, "replyTreeSize"=>0, "mostRecentActivity"=>"2013-02-19T17:21:49Z", "replies"=>[]}]}]}

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• {"id"=>"294211547268534272", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-23T22:34:33Z", "user"=>"PLOSONE", "user_name"=>"PLOS ONE", "user_profile_image"=>"http://a0.twimg.com/profile_images/2429958559/mzjl6as5u2m09r2erof6_normal.jpeg"}
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• {"id"=>"294212466886451200", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-23T22:38:12Z", "user"=>"doctorBrown_org", "user_name"=>"Eric Brown", "user_profile_image"=>"http://a0.twimg.com/profile_images/1361197219/type-0001-fun_normal.jpg"}
• {"id"=>"294212633710718978", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-23T22:38:52Z", "user"=>"MikeTaylor", "user_name"=>"Mike Taylor", "user_profile_image"=>"http://a0.twimg.com/profile_images/1826988633/new-avatar_normal.jpeg"}
• {"id"=>"294219430341255169", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-23T23:05:53Z", "user"=>"yrochat", "user_name"=>"Yannick Rochat", "user_profile_image"=>"http://a0.twimg.com/profile_images/2363366444/kcy23eucs8nz82fjg6lg_normal.jpeg"}
• {"id"=>"294225180518129664", "text"=>"#PLOSONE: Multivariate Analyses of Small #Theropod #Dinosaur Teeth and Implications for Paleoecol Turnover through Time http://t.co/TpP0rX4i", "created_at"=>"2013-01-23T23:28:44Z", "user"=>"TomHoltzPaleo", "user_name"=>"Thomas R. Holtz, Jr.", "user_profile_image"=>"http://a0.twimg.com/profile_images/2455895219/kntuv5szwkeg0v9ivimo_normal.jpeg"}
• {"id"=>"294236098253713408", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-24T00:12:07Z", "user"=>"DavidEvans_ROM", "user_name"=>"David Evans", "user_profile_image"=>"http://a0.twimg.com/profile_images/1397150146/me_in_milkriver_normal.jpg"}
• {"id"=>"294236135692046336", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-24T00:12:16Z", "user"=>"PaleoNic", "user_name"=>"Nicolas Campione", "user_profile_image"=>"http://a0.twimg.com/profile_images/2516494766/qpmavhivh3rciqchaxy3_normal.jpeg"}
• {"id"=>"294238744536551424", "text"=>"Larson & Currie #PLOSONE on #Dinosaur Park Fm small #theropod teeth: Zapsalis & Pectinodon regarded as valid http://t.co/wy2p8N72 #fossils", "created_at"=>"2013-01-24T00:22:38Z", "user"=>"TetZoo", "user_name"=>"Darren Naish", "user_profile_image"=>"http://a0.twimg.com/profile_images/1365796113/Naish-quetz-humerus-150-px_normal.jpg"}
• {"id"=>"294240452859793408", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-24T00:29:25Z", "user"=>"kironcmukherjee", "user_name"=>"Kiron Mukherjee", "user_profile_image"=>"http://a0.twimg.com/profile_images/2476163761/37phq0b0ch0fnq1kif9p_normal.jpeg"}
• {"id"=>"294253969465806848", "text"=>"Multivariate Analyses of Small Theropod\nDinosaur Teeth and Implications for\nPaleoecological Turnover through Time http://t.co/kcvJYKOM", "created_at"=>"2013-01-24T01:23:07Z", "user"=>"ferwen", "user_name"=>"fernanda castano", "user_profile_image"=>"http://a0.twimg.com/profile_images/2621861334/ujzqboovzxgl3h5mugrh_normal.jpeg"}
• {"id"=>"294256848410931200", "text"=>"RT @ferwen: Multivariate Analyses of Small Theropod\nDinosaur Teeth and Implications for\nPaleoecological Turnover through Time http://t.co/kcvJYKOM", "created_at"=>"2013-01-24T01:34:34Z", "user"=>"L_ssar", "user_name"=>"L-ssar", "user_profile_image"=>"http://a0.twimg.com/profile_images/2337922644/cdnk69xu39vxa8wixw79_normal.jpeg"}
• {"id"=>"294287499545698304", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-24T03:36:22Z", "user"=>"MatthewVavrek", "user_name"=>"Matthew Vavrek", "user_profile_image"=>"http://a0.twimg.com/profile_images/1795963233/DSCN1425_normal.JPG"}
• {"id"=>"294303673536888832", "text"=>"Study on theropod dinosaur teeth by @thereal_dlarson and Phil Currie is a great example of data re-use & augmentation. http://t.co/cBr8tFXZ", "created_at"=>"2013-01-24T04:40:38Z", "user"=>"AndyFarke", "user_name"=>"Andrew A. Farke", "user_profile_image"=>"http://a0.twimg.com/profile_images/1268991571/farke_normal.jpg"}
• {"id"=>"294306353277726720", "text"=>"New @PLOSONE study is a guide to using isolated theropod teeth to track dinosaur diversity through time http://t.co/UzdPYFzW ht @AndyFarke", "created_at"=>"2013-01-24T04:51:17Z", "user"=>"Laelaps", "user_name"=>"Brian Switek", "user_profile_image"=>"http://a0.twimg.com/profile_images/2916837454/35cb71277156e79fd920ffa31bc33980_normal.jpeg"}
• {"id"=>"294391041321222144", "text"=>"Distinguishing diminutive dinosaur teeth through @PLOSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T10:27:48Z", "user"=>"MarcEHJones", "user_name"=>"Marc Jones", "user_profile_image"=>"http://a0.twimg.com/profile_images/2397131428/Jones_MEH_Namibia_normal.jpg"}
• {"id"=>"294391143859384320", "text"=>"Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T10:28:12Z", "user"=>"MarcEHJones", "user_name"=>"Marc Jones", "user_profile_image"=>"http://a0.twimg.com/profile_images/2397131428/Jones_MEH_Namibia_normal.jpg"}
• {"id"=>"294391388706045953", "text"=>"Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T10:29:11Z", "user"=>"MarcEHJones", "user_name"=>"Marc Jones", "user_profile_image"=>"http://a0.twimg.com/profile_images/2397131428/Jones_MEH_Namibia_normal.jpg"}
• {"id"=>"294404214086565889", "text"=>"RT @MarcEHJones: Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T11:20:09Z", "user"=>"morganucodon", "user_name"=>"Robin Whatley", "user_profile_image"=>"http://a0.twimg.com/profile_images/1036116804/rw_normal.jpg"}
• {"id"=>"294432310441422849", "text"=>"RT @MarcEHJones: Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T13:11:47Z", "user"=>"Ichnologist", "user_name"=>"Anthony(Tony) Martin", "user_profile_image"=>"http://a0.twimg.com/profile_images/3083823572/a0123ffb6a5d8abc52a17e2a3f1192ff_normal.jpeg"}
• {"id"=>"294479872816988161", "text"=>"RT @MarcEHJones: Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T16:20:47Z", "user"=>"ROMPalaeo", "user_name"=>"ROM Palaeontology", "user_profile_image"=>"http://a0.twimg.com/profile_images/1792438743/rom-palaeo_normal.JPG"}
• {"id"=>"294481411698720768", "text"=>"RT @MarcEHJones: Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T16:26:54Z", "user"=>"thereal_dlarson", "user_name"=>"Derek Larson", "user_profile_image"=>"http://a0.twimg.com/profile_images/2866720052/9b7ad62a87e32227f78aa8d760f0246d_normal.jpeg"}
• {"id"=>"294592813973254144", "text"=>"RT @MarcEHJones: Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-24T23:49:34Z", "user"=>"PincSeren", "user_name"=>"Anne Jones", "user_profile_image"=>"http://a0.twimg.com/sticky/default_profile_images/default_profile_4_normal.png"}
• {"id"=>"294608838127124480", "text"=>"RT @MarcEHJones: Distinguishing diminutive dinosaur teeth through time @PLoSONE #dinosaur #fossil #reptile #teeth #USA http://t.co/nCnluU4h", "created_at"=>"2013-01-25T00:53:15Z", "user"=>"EarthquakeDinos", "user_name"=>"Earthquake Dinosaurs", "user_profile_image"=>"http://a0.twimg.com/profile_images/1804689922/EarthQuakeDinosaurs_Logo_v_normal.jpg"}
• {"id"=>"294937290030067712", "text"=>"RT @thereal_dlarson: My new paper is out today! #PLOSONE: Multivariate Analyses of Small Theropod Dinosaur Teeth http://t.co/oOGiWgfm", "created_at"=>"2013-01-25T22:38:24Z", "user"=>"Bellsclass", "user_name"=>"Marcia Bell", "user_profile_image"=>"http://a0.twimg.com/profile_images/1591569196/268034_198983256815439_179726328741132_537276_3278626_n_normal.jpg"}
• {"id"=>"301354106021371904", "text"=>"How many theropod #dinosaurs can we recognize from teeth? @Protohedgehog investigates: http://t.co/47x2dZJN Dig deeper: http://t.co/cBr8tFXZ", "created_at"=>"2013-02-12T15:36:32Z", "user"=>"AndyFarke", "user_name"=>"Andrew A. Farke", "user_profile_image"=>"http://a0.twimg.com/profile_images/1268991571/farke_normal.jpg"}
• {"id"=>"441741924748099584", "text"=>"@DNLee5 http://t.co/W5s0sAwo4M is a great example of paper adding to published data sets to make new science", "created_at"=>"2014-03-07T01:07:36Z", "user"=>"AndyFarke", "user_name"=>"Andrew A. Farke", "user_profile_image"=>"http://pbs.twimg.com/profile_images/1268991571/farke_normal.jpg"}

Wikipedia | Further Information

• {"title"=>"Richardoestesia", "url"=>"http://en.wikipedia.org/wiki/Richardoestesia", "timestamp"=>"2019-01-05T01:04:01Z"}
• {"title"=>"Zapsalis", "url"=>"http://en.wikipedia.org/wiki/Zapsalis", "timestamp"=>"2019-02-04T21:40:37Z"}
• {"title"=>"Judith River Formation", "url"=>"http://en.wikipedia.org/wiki/Judith_River_Formation", "timestamp"=>"2018-09-22T09:51:23Z"}
• {"title"=>"Pectinodon", "url"=>"http://en.wikipedia.org/wiki/Pectinodon", "timestamp"=>"2019-01-13T21:55:23Z"}
• {"title"=>"Richardoestesia", "url"=>"http://nl.wikipedia.org/wiki/Richardoestesia", "timestamp"=>"2019-01-11T19:39:08Z"}
• {"title"=>"Zapsalis", "url"=>"http://nl.wikipedia.org/wiki/Zapsalis", "timestamp"=>"2013-03-15T23:28:38Z"}
• {"title"=>"Pectinodon", "url"=>"http://nl.wikipedia.org/wiki/Pectinodon", "timestamp"=>"2013-07-02T20:21:52Z"}
• {"title"=>"Richardoestesia", "url"=>"http://fr.wikipedia.org/wiki/Richardoestesia", "timestamp"=>"2019-01-22T13:18:06Z"}
• {"title"=>"Pectinodon bakkeri", "url"=>"http://it.wikipedia.org/wiki/Pectinodon_bakkeri", "timestamp"=>"2018-03-26T18:24:30Z"}
• {"title"=>"Richardoestesia", "url"=>"http://it.wikipedia.org/wiki/Richardoestesia", "timestamp"=>"2018-03-26T19:14:05Z"}
• {"title"=>"Zapsalis", "url"=>"http://es.wikipedia.org/wiki/Zapsalis", "timestamp"=>"2017-12-27T11:33:02Z"}
• {"title"=>"Pectinodon", "url"=>"http://es.wikipedia.org/wiki/Pectinodon", "timestamp"=>"2015-11-26T15:32:58Z"}
• {"title"=>"リカルドエステシア", "url"=>"http://ja.wikipedia.org/wiki/リカルドエステシア", "timestamp"=>"2017-06-11T22:38:33Z"}
• {"title"=>"Zapsalis", "url"=>"http://pt.wikipedia.org/wiki/Zapsalis", "timestamp"=>"2015-12-08T02:21:04Z"}
• {"title"=>"Paronychodon", "url"=>"http://cs.wikipedia.org/wiki/Paronychodon", "timestamp"=>"2018-09-02T02:31:07Z"}
• {"title"=>"Zapsalis", "url"=>"http://cs.wikipedia.org/wiki/Zapsalis", "timestamp"=>"2017-11-28T19:17:27Z"}

Wordpress.com | Further Information

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Figshare

• {"files"=>["https://ndownloader.figshare.com/files/477654", "https://ndownloader.figshare.com/files/477656", "https://ndownloader.figshare.com/files/477657"], "description"=>"<div><p>Isolated small theropod teeth are abundant in vertebrate microfossil assemblages, and are frequently used in studies of species diversity in ancient ecosystems. However, determining the taxonomic affinities of these teeth is problematic due to an absence of associated diagnostic skeletal material. Species such as <em>Dromaeosaurus albertensis</em>, <em>Richardoestesia gilmorei,</em> and <em>Saurornitholestes langstoni</em> are known from skeletal remains that have been recovered exclusively from the Dinosaur Park Formation (Campanian). It is therefore likely that teeth from different formations widely disparate in age or geographic position are not referable to these species. Tooth taxa without any associated skeletal material, such as <em>Paronychodon lacustris</em> and <em>Richardoestesia isosceles</em>, have also been identified from multiple localities of disparate ages throughout the Late Cretaceous. To address this problem, a dataset of measurements of 1183 small theropod teeth (the most specimen-rich theropod tooth dataset ever constructed) from North America ranging in age from Santonian through Maastrichtian were analyzed using multivariate statistical methods: canonical variate analysis, pairwise discriminant function analysis, and multivariate analysis of variance. The results indicate that teeth referred to the same taxon from different formations are often quantitatively distinct. In contrast, isolated teeth found in time equivalent formations are not quantitatively distinguishable from each other. These results support the hypothesis that small theropod taxa, like other dinosaurs in the Late Cretaceous, tend to be exclusive to discrete host formations. The methods outlined have great potential for future studies of isolated teeth worldwide, and may be the most useful non-destructive technique known of extracting the most data possible from isolated and fragmentary specimens. The ability to accurately assess species diversity and turnover through time based on isolated teeth will help illuminate patterns of evolution and extinction in these groups and potentially others in greater detail than has previously been thought possible without more complete skeletal material.</p> </div>", "links"=>[], "tags"=>["multivariate", "analyses", "theropod", "dinosaur", "teeth", "implications", "paleoecological", "turnover", "time"], "article_id"=>154081, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.s001", "https://dx.doi.org/10.1371/journal.pone.0054329.s002", "https://dx.doi.org/10.1371/journal.pone.0054329.s003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Multivariate_Analyses_of_Small_Theropod_Dinosaur_Teeth_and_Implications_for_Paleoecological_Turnover_through_Time__/154081", "title"=>"Multivariate Analyses of Small Theropod Dinosaur Teeth and Implications for Paleoecological Turnover through Time", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2013-01-23 01:08:01"}
• {"files"=>["https://ndownloader.figshare.com/files/502170"], "description"=>"<p>ADM, anterior denticles per millimetre; BW, basal width; CH, crown height; FABL, fore-aft basal length; and PDM, posterior denticles per millimetre.</p>", "links"=>[], "tags"=>["Evolutionary biology", "mathematics"], "article_id"=>172695, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.g001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Tooth_measurements_used_in_this_study_/172695", "title"=>"Tooth measurements used in this study.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-01-23 00:44:55"}
• {"files"=>["https://ndownloader.figshare.com/files/502266"], "description"=>"<p>A, Saurornitholestinae; B, Dromaeosaurinae; C, cf. <i>Zapsalis</i>; D, Dromaeosauridae; E, cf. <i>Richardoestesia gilmorei</i>; F, cf. <i>Richardoestesia isosceles</i>; G, cf. <i>Pectinodon</i>; and H, cf. <i>Troodon</i>. Qualitative characters: 1, posterior denticles apically oriented (that is, asymmetric denticles with a shorter apical side); 2, anterior denticles much smaller than posterior denticles; 3, posterior denticles rounded; 4, anterior denticles the same or slightly smaller than posterior denticles; 5, anterior denticles usually absent; 6, strong longitudinal ridges; 7, posterior denticles large and apically oriented; 8, posterior denticles are small and rounded; 9, anterior denticles are similar in size to posterior denticles or absent; 10, tall isosceles triangle shape; 11, posterior denticles very large and often rounded with apex of tooth frequently forming apical-most denticle; 12, posterior denticles are very large and apically hooked; and 13, anterior denticles are very large or absent. A, B, and H modified from Larson et al. 2010; C–F modified from Larson (2008); and G modified from Longrich (2008). Scale bars are 1 mm and correspond to images of crowns.</p>", "links"=>[], "tags"=>["morphotypes", "priori", "categories", "formations", "qualitative", "characters"], "article_id"=>172783, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.g002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Qualitative_morphotypes_used_to_construct_a_priori_categories_within_formations_and_the_qualitative_characters_that_define_them_/172783", "title"=>"Qualitative morphotypes used to construct a priori categories within formations and the qualitative characters that define them.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-01-23 00:46:23"}
• {"files"=>["https://ndownloader.figshare.com/files/502358"], "description"=>"<p>The black star indicates the centroid of the dataset from which the relative orientations of the biplot rays in the upper right were calculated. Canonical axes 1 and 2 indicate the first two axes of maximum discrimination in the dataset.</p>", "links"=>[], "tags"=>["variate", "1047", "teeth", "32", "categories", "distinguished", "qualitative", "morphotype", "chronostratigraphic"], "article_id"=>172873, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.g003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Canonical_variate_analysis_of_1047_teeth_in_32_categories_distinguished_by_qualitative_morphotype_and_chronostratigraphic_unit_/172873", "title"=>"Canonical variate analysis of 1047 teeth in 32 categories distinguished by qualitative morphotype and chronostratigraphic unit.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-01-23 00:47:53"}
• {"files"=>["https://ndownloader.figshare.com/files/502419"], "description"=>"<p>A, <i>Saurornitholoestes langstoni</i> (Dinosaur Park; gray) vs. Oldman Saurornitholestinae (black), no discrimination of categories (hit ratio = 69.44%, <i>p</i> = 0.1363). B, <i>S. langstoni</i> (Dinosaur Park; gray) vs. <i>Atrociraptor marshalli</i> (Horseshoe Canyon; black), discrimination of categories (hit ratio = 94.215%, <i>p</i><0.0001). Centroids (with 95% confidence interval) and associated convex hulls are labelled. Canonical axes 1 and 2 indicate the first two axes of maximum discrimination in the dataset.</p>", "links"=>[], "tags"=>["discriminant", "canonical"], "article_id"=>172943, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.g004"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Example_discriminant_function_analysis_DFA_canonical_plots_/172943", "title"=>"Example discriminant function analysis (DFA) canonical plots.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-01-23 00:49:03"}
• {"files"=>["https://ndownloader.figshare.com/files/502468"], "description"=>"<p>A, <i>Dromaeosaurus albertensis</i>. B, <i>Atrociraptor marshalli</i>. Gray indicates holotype specimen teeth, black indicates referred isolated teeth. Associated convex hulls are marked. Canonical axes 1 and 2 indicate the first two axes of maximum discrimination in the dataset.</p>", "links"=>[], "tags"=>["specimens", "referred"], "article_id"=>172990, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.g005"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Discriminant_function_analysis_of_type_specimens_versus_referred_isolated_teeth_/172990", "title"=>"Discriminant function analysis of type specimens versus referred isolated teeth.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-01-23 00:49:50"}
• {"files"=>["https://ndownloader.figshare.com/files/502531"], "description"=>"<p>Each tooth icon likely represents a distinct taxon with the indicated known range based on formation as observed in this study. A, Lancian Saurornitholestinae gen. et sp., UCMP 187036 (reversed); B, <i>Pectinodon bakkeri</i>; C, Lancian cf. <i>Richardoestesia gilmorei</i>, UCMP 120255 (reversed); D, Lancian cf. <i>Richardoestesia isosceles</i>, UCMP 187175 (reversed); E, <i>Atrociraptor marshalli</i>, TMP 2000.045.0035; F, Horseshoe Canyon Dromaeosaurinae gen. et sp., TMP 1999.050.0116 (reversed); G, Horseshoe Canyon cf. <i>Troodon</i> sp., TMP 2000.045.0024 (reversed); H, Horseshoe Canyon cf. <i>R. gilmorei</i>, TMP 2003.015.0002; I, <i>Saurornitholestes langstoni</i>, TMP 1995.147.0026; J, <i>Bambiraptor feinbergi</i>, AMNH FR 30556; K, <i>Dromaeosaurus albertensis</i>, TMP 1986.130.0211; L, <i>Zapsalis abradens</i>, TMP 1987.050.0008; M, <i>Troodon formosus</i>, TMP 1995.147.0025; N, Dinosaur Park cf. <i>Pectinodon</i> sp., TMP 2000.021.0001; O, <i>Richardoestesa gilmorei</i>, TMP 2000.019.0004; P, Oldman cf. <i>R. gilmorei</i>, 1987.080.0035; Q, <i>Richardoestesia isosceles</i>, LSUMGS 489∶6238 (reversed); R, Milk River Saurornitholestinae gen. et sp., UALVP 50531 (reversed); S, Milk River Dromaeosauridae gen. et sp., UALVP 48365 (reversed); T, Milk River Dromaeosaurinae gen. et sp., UALVP 49571; U, Milk River cf. <i>Zapsalis</i> sp., UALVP 49582; V, Aquilan cf. <i>Richardoestesia gilmorei</i>, UALVP 48157 (reversed); and W, Aquilan cf. <i>Richardoestesia isosceles</i>, UALVP 48279 (reversed). B modified from Longrich (2008); H modified from Larson et al. (2010); J modified from Burnham (2004); P modified from Sankey et al. (2002); Q modified from Sankey (2001); R–W modified from Larson (2008). Teeth scaled to matching FABL. [full page width].</p>", "links"=>[], "tags"=>["quantitative", "morphotypes", "stratigraphic"], "article_id"=>173061, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.g006"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Summary_of_quantitative_morphotypes_showing_their_stratigraphic_ages_/173061", "title"=>"Summary of quantitative morphotypes showing their stratigraphic ages.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-01-23 00:51:01"}
• {"files"=>["https://ndownloader.figshare.com/files/502678"], "description"=>"<p>Teeth that can be identified as cf. <i>Paronychodon lacustris</i> (sensu Currie et al., 1990) occur in all formations.</p>", "links"=>[], "tags"=>["taxonomic", "identifications", "theropods", "teeth", "formations", "holotype", "referred", "skeletal"], "article_id"=>173191, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.t003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Table_3_Taxonomic_identifications_of_small_theropods_with_teeth_in_the_formations_used_in_this_study_based_on_holotype_material_referred_skeletal_material_and_the_results_of_the_current_study_/173191", "title"=>"Table. 3. Taxonomic identifications of small theropods with teeth in the formations used in this study based on holotype material, referred skeletal material, and the results of the current study.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-01-23 00:53:11"}
• {"files"=>["https://ndownloader.figshare.com/files/502703"], "description"=>"<p>Bolded numbers indicate a non-significant differences in MANOVA; * indicates analyses with only three variables. [full page width].</p>", "links"=>[], "tags"=>["ratios", "pairwise", "discriminant", "theropod", "categories"], "article_id"=>173226, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.t002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Hit_ratios_for_each_pairwise_discriminant_function_analysis_DFA_of_theropod_tooth_categories_showing_the_percentage_of_correctly_identified_elements_/173226", "title"=>"Hit ratios for each pairwise discriminant function analysis (DFA) of theropod tooth categories showing the percentage of correctly identified elements.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-01-23 00:53:46"}
• {"files"=>["https://ndownloader.figshare.com/files/502736"], "description"=>"<p>Individual tooth sample sizes of categories used in analyses by lithostratigraphic unit and qualitative morphotype.</p>", "links"=>[], "tags"=>["sizes", "categories", "analyses", "lithostratigraphic", "qualitative"], "article_id"=>173255, "categories"=>["Mathematics", "Evolutionary Biology"], "users"=>["Derek W. Larson", "Philip J. Currie"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0054329.t001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Individual_tooth_sample_sizes_of_categories_used_in_analyses_by_lithostratigraphic_unit_and_qualitative_morphotype_/173255", "title"=>"Individual tooth sample sizes of categories used in analyses by lithostratigraphic unit and qualitative morphotype.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2013-01-23 00:54:15"}

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Relative Metric

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F1000Prime