Spencer G.LUCAS,Robert M.SULLIVAN,Justin A.SPIELMANN

• 1:新墨西哥州自然历史与科学博物馆
• 2:宾夕法尼亚州立博物馆古生物学和地质学部

摘要(Abstract)：

北美西部内陆白垩纪的脊椎动物生物年代学的研究始于19世纪90年代。前人建议的期,即陆生脊椎动物"期"或陆生哺乳动物"期"名已过十二个,但其中具有精确的定义者甚少,仅有少量的建议受到广泛认可和使用。本文定义或重新定义了10个陆生脊椎动物"期",包括了西部内陆从最老至最新的全部白垩纪—Comobluffian期(～提塘期至欧特里沃期)、Buffalogapian期(～巴列姆期至早阿普特期)、Cashenranchian期(～早阿普特期至晚阿尔布期)、Mussentuchian期(～晚阿尔布期至塞诺曼期)、Fencelakean期(土伦期至晚塞农期)、Aquilan期(～晚塞农期至早坎潘期)、Judithian期(～中坎潘期)、Kirtlandian期(～晚坎潘期)、Edmontonian期(～坎潘期末期至早马斯特里赫特期)以及Lancian期(～早马斯特里赫特期晚期)。每一个"期"的开始由一种恐龙或哺乳动物种类的首现来定义,而其结束由后续的"期"的开始来定义。这样定义的脊椎动物生物年代代表了完整的白垩纪时间表。但有些时间段(尤其是Neocomian(尼欧克姆期)的大部分以及部分"中"白垩世的一部分)缺乏足够的脊椎动物化石特征。这些白垩纪陆生脊椎动物"期"构成了一个能使北美西部内陆的脊椎动物的演化历史得以序和解释年代表。

关键词(KeyWords)： 生物地层学;脊椎动物的生物年代学;陆相脊椎动物“期”;白垩纪;西部内陆;北美地区

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(No.91114201);; 国家重点基础研究发展计划(2012CB821906)资助出版

作者(Author): Spencer G.LUCAS,Robert M.SULLIVAN,Justin A.SPIELMANN

DOI: 10.19839/j.cnki.dcxzz.2012.02.019

参考文献(References)：

• Anderson S M.1939.Dinosaur tracks in the Lakota Sandstoneof the eastern Black Hills,South Dakota.Journal of Paleontology,13:361-364
• Arbour V M,Burns M E&Sissons R L.2009.A redescriptionof the ankylosaurid dinosaur Dyoplosaurus acutosquameusParks,1924(Ornithischia:Ankylosauria)and a revision othe genus.Journal of Vertebrate Paleontology,29:11171135
• Archibald J D.1996.Dinosaur extinction and the end of an era:What the fossils say.New York:Columbia University Press.1-235
• Bakker R T.1990.A new latest Jurassic vertebrate fauna,fromthe highest levels of the Morrison Formation at Como BlufWyoming with comments on Morrison biochronology.Part Biochronology.Hunteria,2(6):1-3
• Baszio S.1997.Systematic palaeontology of isolated dinosaurteeth from the largest Cretaceous of south Alberta,Canada.Courier Forschungsinstitut und Naturmuseum Senckenberg,196:271-278
• Bjork P R.1985.A new iguanodontid dinosaur from the LakotaFormation of the northern Black Hills of South Dakota.Proceedings of the Pacific Division of the American Association for the Advancement of Science,4:22
• Blows W T.1998.A review of Lower and Middle Cretaceousdinosaurs of England.New Mexico Museum of NaturalHistory and Science Bulletin,14:29-38
• Bodily N M.1969.An armored dinosaur from the Lower Cretaceous of Utah.Brigham Young University Studies,16:557-580
• Bonaparte J F.1966.Chronological survey of the tetrapodbearing Triassic of Argentina.Breviora,251:1-13
• Breithaupt B.1982.Paleontology and paleoecology of theLance Formation(Maastrichtian),east flank of Rock Springsuplift,Sweetwater County,Wyoming.Rocky Mountain Geology,21:123-151
• Breithaupt B.1985.Nonmammalian vertebrate faunas from theLate Cretaceous of Wyoming.In:Nelson G E ed.The Cretaceous geology of Wyoming.Wyoming Geological Association36th Annual Field Conference.Casper:WyomingGeological Association.159-175
• Brett-Surman M K.&Paul G S.1985.A new family ofbird-like dinosaurs linking Laurasia and Gondwanaland.Journal of Vertebrate Paleontology,5:133-138
• Brinkman D B.2003.A review of nomarine turtles from theLate Cretaceous of Alberta.Canadian Journal of Earth Science,40:557-571
• Brown B&Schlaikjer E M.1942.The skeleton of Leptoceratops with the description of a new species.American Museum Novitates,1169:1-15
• Bryant L J.1987.A new genus and species of Amiidae(Holostei;Osteichthyes)from the Late Cretaceous of NorthAmerica,with comments on the phylogeny of the Amiidae.Journal of Vertebrate Paleontology,7:349-361
• Buckley L&Ott C J.2001.A new specimen of alvarezsauridfrom the Late Cretaceous Hell Creek Formation.Journal ofVertebrate Paleontology,21(suppl.to no.3):36A-37A
• Burns M E&Sullivan R M.2011.A new ankylosaurid from theUpper Cretaceous Kirtland Formation,San Juan Basin,withcomments on the diversity of ankylosaurids in New Mexico.New Mexico Museum of Natural History and Science Bulletin,53:169-178
• Campione N E&Evans D C.2011.Cranial growth and variation in edmontosaurs(Dinosauria:Hadrosauridae):implications for latest Cretaceous megaherbivore diversity in NorthAmerica.PLoS One,6(9):1-12
• Carpenter K&Breithaupt B.1986.Latest Cretaceous occurrence of nodosaurid ankylosaurs(Dinosauria,Ornithisichia)inwestern North America and the gradual extinction of the dinosaurs.Journal of Vertebrate Paleontology,6:251-257
• Carpenter K&Kirkland J I.1998.Review of Lower and middleCretaceous ankylosaurs from North America.New MexicoMuseum of Natural History and Science Bulletin,14:249-270
• Chen Z Q&Lubin S.1997.A fission-track study of the terrigenous sedimentary sequences of the Morrison and Cloverlyformations in the northeastern Bighorn Basin,Wyoming.The Mountain Geologist,34:51-62
• Chin K,Tokaryk T T&Erickson G M.1998a.Probably Tyrannosaurus rex coprolite from the Maastrichtian FrenchmanFormation of Saskatchewan.Journal of Vertebrate Paleontology,16(suppl.to no.3):27A
• Chin K,Tokaryk T T,Erickson G M&Calk L C.1998b.Aking-sized theropod coprolite.Nature,393:680-682
• Cifelli R L.1990a.Cretaceous mammals of southern Utah.I.Marsupials from the Kaiparowits Formation(Judithian).Journal of Vertebrate Paleontology,10:295-319
• Cifelli R L.1990b.Cretaceous mammals of southern Utah.II.Marsupials and marsupial-like mammals from the WahweapFormation(early Campanian).Journal of Vertebrate Paleontology,10:320-331
• Cifelli R L.1990c.Cretaceous mammals of southern Utah.III.Therian mammals from the Turonian(early Late Cretaceous).Journal of Vertebrate Paleontology,10:332-345
• Cifelli R L.1994.Therian mammals of the Terlingua localfauna(Judithian),Aguja Formation,Big Bend of the RioGrande,Texas.Contributions to Geology,University ofWyoming,30:117-136
• Cifelli R L.&Madsen S K.1986.An Upper Cretaceous symmetrodont(Mammalia)from southern Utah.Journal of Vertebrate Paleontology,6:258-263
• Cifelli R L,Nydam R L,Gardner J D,Weil A,Eaton J G,Kirkland J I&Madsen S K.1999.Medial Cretaceous vertebratesfrom the Cedar Mountain Formation,Elliot County,Utah:The Mussentuchit local fauna.In:Gillette D D ed.Vertebrate paleontology in Utah.Utah Geological Survey Miscellaneous Publications,99-1:219-242
• Cifelli R L,Eberle J J,Lofgren D L,Lillegraven J A&Clemens W A.2004.Mammalian biochronology of the latest Cretaceous.In:Woodburne M O ed.Late Cretaceous and Cenozoic mammals of North America.New York:ColumbiaUniversity Press.21-42
• Clemens W A Jr.1963.Fossil mammals of the type Lance Formation,Wyoming.Part1.Introduction and multituberculata.University of California Publications in Geological Sciences,48:1-105
• Clemens W A Jr.1966.Fossil mammals of the type Lance Formation,Wyoming.Part II.Marsupialia.University of California Publications in Geological Sciences,62:1-122
• Clemens W A Jr.1973.Fossil mammals of the type Lance Formation,Wyoming.Part III.Eutheria and summary.University of California Publications in Geological Sciences,94:1-102
• Cobban W A&Reeside J B Jr.1952.Correlation of the Cretaceous formations of the Western Interior of the United States.Geological Society of America Bulletin,63:1011-1044
• Colbert E H.1965.The age of reptiles.New York:W W Norton&Company.1-228
• Coombs W P Jr.1995.A nodosaurid ankylosaur(Dinosauria,Ornithischia)from the Lower Cretaceous of Texas.Journalof Vertebrate Paleontology,15:298-312
• Currie P J.1987.Theropods of the Judith River Formation ofDinosaur Provincial Park,Alberta.In:Currie P J&Koster EH eds.Fourth Symposium on Mesozoic Terrestrial Ecosystems,Short Papers.Occasional Papers of the Tyrrell Museum of Palaeontology.52-60
• Currie P J.1989.Dinosaur footprints of western Canada.In:Gillette D D&Lockley M G eds.Dinosaur tracks and traces.Cambridge:Cambridge University Press.293-300
• Currie P J&Koppelhus E B eds.2005.Dinosaur ProvincialPark:a spectacular ancient ecosystem revealed.Bloomington:Indiana University Press.1-648
• Curtice B.2000.The axial skeleton of Sonorasaurus thompsoniRatkevich,1998.Mesa Southwest Museum Bulletin,7:83-87
• Demar D G Jr&Breithaupt B H.2006.The nonmammalianvertebrate microfossil assemblages of the Mesaverde Formation(Upper Cretaceous,Campanian)of the Wind Riverand Bighorn basins,Wyoming.New Mexico Museum ofNatural History and Science Bulletin,35:33-53
• DiCroce T&Carpenter K.2001.New ornithopod from theCedar Mountain Formation(Lower Cretaceous)of easternUtah.In:Tanke D H&Carpenter K eds.Mesozoic vertebrate life.Bloomington:Indiana University Press.183-196
• Diem S.1999.Vertebrate faunal analysis of the Upper Cretaceous Williams Fork Formation,northwestern Colorado[Master's thesis].San Diego:San Diego State University.1-188
• Diem S&Archibald J D.2005.Range extension of southernchasmosaurine ceratopsian dinosaurs in northwestern Colorado.Journal of Paleontology,79:251-258
• Difley R&Ekdale A A.1998.Biostratigraphic aspects of th Cretaceous-Tertiary(KT)boundary interval at North HornMountain,Emery County,Utah.In:Gillette D D ed.Vertebrate paleontology in Utah.Miscellaneous Publications ofthe Utah Geological Survey,99-1:389-398
• Dodson P.1984.Small Judithian ceratopsids,Montana andAlberta.In:Reif W-E&Westphal F eds.Third Symposiumon Mesozoic terrestrial ecosystems,Short Papers.Tübingen:Attempto Verlag.73-78
• Dodson P.1986.Avaceratops lammersi:a new ceratopsid fromthe Judith River Formation of Montana.Proceedings of theAcademy of Natural Science Philadelphia,138:305-317
• Dorf E.1942.Upper Cretaceous floras of the Rocky Mountainregion.II:Flora of the Lance Formation at its type locality,Niobrara County,Wyoming.Carnegie Institute of Washington Publication,508:79-159
• Dunbar C O&Rodgers J.1957.Principles of stratigraphy.NewYork:John Wiley&Sons,Inc.1-356
• Eaton J G.1987.Stratigraphy,depositional environments,andage of Cretaceous mammal-bearing rocks in Utah,and systematics of the Multituberculata(Mammalia)[Ph.D.dissertation].Boulder:University of Colorado.1-308
• Eaton J G.1990.Stratigraphic revision of Campanian(UpperCretaceous)rocks in the Henry Basin,Utah.Mountain Geologist,10:27-38
• Eaton J G.1993.Mammalian paleontology and correlation inthe uppermost Cretaceous rocks of the Paunsaugant Plateau.Museum of Arizona,Special Paper260:163-180
• Eaton J G.2006.Late Cretaceous mammals from Cedar Canyon,southwestern Utah.New Mexico Museum of Natural Historyand Science,Bulletin35:373-402
• Eaton J G,Munk H&Hardman M A.1998.A new vertebratefossil locality withinin the Wahweap Formation(UpperCretaceous)of Bryce Canyon National Park and its bearingon the presence of the Kaiparowits Formation on the Paunsaugunt Plateau.Technical Reports,Nataional Park Sevice,98(1):36-40
• Eaton J G,Cifelli R L,Hutchison J H,Kirkland J I&Parrish JM.1999a.Cretaceous vertebrate faunas from the Kaiparowits Plateau,south-central Utah.Utah Geological Sur-vey Miscellaneous Publication,99(1):345-353
• Eaton J G,Diem S,Archibald J D,Schierup C&Munk H.1999b.Vertebrate paleontology of the Upper Cretaceousrocks of the Markagunt Plateau,southwestern Utah.Miscellaneous Publications of the Utah Geological Survey,99(1):323-334
• Eberth D A,Currie P J,Brinkman D B,Ryan M J,Braman D R,Gardner J D,Lam V D,Spivak D N&Neuman A G.2001.Alberta’s dinosaurs and other fossil vertebrates:Judith River&Edmonton groups(Campanian Maastrichtian).In:Hill CL eds.Mesozoic and Cenozoic paleontology in the WesternPlains and Rocky Mountains:guidebook for the field trips.Society of Vertebrate Paleontology61st annual meeting,Bozeman,Montana.Museum of the Rockies OccasionalPaper.49-75
• Estes R.1964.Fossil vertebrates from the Late CretaceousLance Formation eastern Wyoming.University of CaliforniaPublications in Geological Sciences,49:1-180
• Estes R.1983.Sauria Terrestria,Amphisbaenia.Handbuch derPal oherpetologie,10A:1-249
• Estes R,Berberian P&Meszoely C A M.1969.Lower vertebrates from the Late Cretaceous Hell Creek Formation,McCone County,Montana.Breviora,337:1-33
• Fassett J E&Steiner M B.1997.Precise age of C33N-C32Rmagnetic-polarity reversal,San Juan Basin,New Mexicoand Colorado.New Mexico Geological Society Guidebook,48:239-247
• Fiorillo A R&Currie P J.1994.Theropod teeth from the JuidthRiver Formation(Upper Cretaceous)of south-central Montana.Journal of Vertebrate Paleontology,14:74-80
• Flynn L J.1986.Late Cretaceous mammal horizons from theSan Juan Basin,New Mexico.American Museum Novitates,2845:1-30
• Forster C A.1984.The paleoecology of the ornithopod dinosaurTenontosaurus tilletti from the Cloverly Formation,BigHorn Basin of Wyoming and Montana.The Mosasaur,2:151-163
• Foster J R.2003.Paleoecological analysis of the vertebratefauna of the Morrison Formation(Upper Jurassic),RockyMountain Region,U S A.New Mexico Museum of NaturalHistory and Science Bulletin,23:1-95
• Foster J.2007.Jurassic West:the dinosaurs of the MorrisonFormation and their world.Bloomington:Indiana UniversityPress.1-389
• Foster J R,Curtice B D&Pagnac D C.1998.First reportedoccurrence of sauropod remains from the Lower Cretaceous(Lakota Formation),Black Hills,South Dakota.Journal of Vertebrate Paleontology,18(suppl.to no.3):43A
• Fox R C.1971a.Marsupial mammals from the early CampanianMilk River Formation,Alberta,Canada.Zoological Journalof the Linnean Society,50(suppl to no.1):145-164
• Fox R C.1971b.Early Campanian multituberculates(Mammalia:Allotheria)from the Upper Milk River Formation,Alberta.Canadian Journal of Earth Sciences,8:916-938
• Fox R C.1976.Additions to the mammalian local fauna fromthe upper Milk River Formation(Upper Cretaceous),Alberta.Canadian Journal of Earth Sciences,13:1105-1118
• Fox R C.1978.Upper Cretaceous terrestrial vertebrate stratigraphy of the Gobi Desert(Mongolian People’s Republic)and western North America.In:Stelck C R&Chatterton BD E eds.Western and Arctic Canadian biostratigraphy.Geological Association of Canada Special Paper,18:577-594
• Fox R C.1979a.Mammals from the Upper Cretaceous OldmanFormation,Alberta.I.Alphadon Simpson(Marsupialia).Canadian Journal of Earth Sciences,16:91-102
• Fox R C.1979b.Mammals from the Upper Cretaceous OldmanFormation,Alberta.II.Pediomys Marsh(Marsupialia).Canadian Journal of Earth Sciences,16:103-113
• Fox R C.1979c.Mammals from the Upper Cretaceous Oldman Formation,Alberta.III.Eutheria.Canadian Journal of EarthSciences,16:114-125
• Fox R C.1980a.Mammals from the Upper Cretaceous OldmanFormation,Alberta.IV.Meniscoessus Cope.Canadian Journal of Earth Sciences,17:1480-1488
• Fox R C.1980b.Picopsis pattersoni,n.gen.and sp.,an unusualtherian from the Upper Cretaceous of Alberta,and the classification of primitive tribosphenic mammals.CanadianJournal of Earth Sciences,17:1489-1498
• Fox R C.1981.Mammals from the Upper Cretaceous OldmanFormation,Alberta.V.Eodelphis Matthew,and the evolutionof the Stagodontidae(Marsupialia).Canadian Journal ofEarth Sciences,18:350-365
• Fox R C.1982.Evidence of new lineage of tribosphenic therians(Mammalia)from the Upper Cretaceous of Alberta,Canada.Geobios Memoire Special,6:169-175
• Fox R C.1984a.Paranyctoides maleficus(new species),anearly eutherian mammal from the Cretaceous of Alberta.In:Dawson M R ed.Papers in vertebrate paleontology honoringRobert Warren Wilson.Carnegie Museum Natural HistorySpecial Publication,9:9-20
• Fox R C.1984b.A primitive,"obtuse-angled"symmetrodont(Mammalia)from the Upper Cretaceous of Alberta,Canada.Canadian Journal of Earth Sciences,21:1204-1207
• Fox R C.1987.Patterns of mammalian evolution towards theend of the Cretaceous,Saskatchewan,Canada.In:Currie P J&Koster E H eds.Fourth symposium on Mesozoic terrestrial ecosystems.Drumheller,Alberta,Tyrrell Museum ofPalaeontology Paper,3:96-100
• Fox R C&Naylor B G.1986.A new species of DidelphodonMarsh(Marsupialia)from the Upper Cretaceous of Alberta,Canada:paleobiology and phylogeny.Neues Jahrbuch fürGeologie und Pal ontologie Abhandlungen,172:357-380
• Galton P M.1995.The species of the basal hypsilophodontiddinosaur Thescelosaurus Gilmore(Ornithischia:Ornithopoda)from the Late Cretaceous of North America.NeuesJahrbuch für Geologie und Pal ontologie Abhandlungen,198:297-311
• Galton P M.1997.Cranial anatomy of the basal hypsilophodontid dinosaur Thescelosaurus neglectus Gilmore(Ornithischia:Ornithopoda)from the Upper Cretaceous ofNorth America.Revue de Paléobiologie,16:231-258
• Galton P M.1999.Cranial anatomy of the hypsilophodontiddinosaur Bugenasaura infernalis(Ornithischia:Ornithopoda)from the Upper Cretaceous of North America.Revue dePaléobiologie,18:517-534
• Galton P M&Jensen J A.1978.Remains of ornithopod dinosaurs from the Lower Cretaceous of North America.Brigham Young University Geological Studies,25:1-10
• Giffin E B,Gabriel D L&Johnson R E.1987.A new pachycephalosaurid skull from the Cretaceous Hell Creek Formation of Montana.Journal of Vertebrate Paleontology,7:398-407
• Gilmore C W.1922.A new sauropod dinosaur from the Ojo Alamo Formation of New Mexico.Smithsonian Miscellaneous Collection,72:1-9
• Gilmore C W.1924.On the skull and skeleton of Hypacrosaurus,helmet-crested dinosaur from the Edmonton Cretaceousof Alberta.Canada Geological Survey Bulletin,38:49-64
• Gilmore C W.1942.Osteology of Polyglyphanodon,an UpperCretaceous lizard from Utah.Proceedings of the UnitedStates National Museum,92:229-265
• Gilmore C W.1946.Reptilian fauna of the North Horn Formation of central Utah U S.Geological Survey ProfessionalPaper,210-C:1-53
• Goodwin M B&Deino A L.1991.The first radiometric agesfrom the Judith River Formation(Upper Cretaceous),HillCounty,Montana.Canadian Journal of Earth Sciences,26:1384-1391
• Gradstein F M,Ogg J G,Smith A G,Bleeker W&Lourens L J.2004.A new Geologic Time Scale with special reference toPrecambrian and Neogene.Episodes,27:83-100
• Gregory W K.1924.A fossil ganoid fish(Lepidotus(?)lacotanus,new species)from the Lower Cretaceous of South Dakota.American Museum Novitates,134:1-8
• Hall J P&Wolberg D L.1989.A new Late Cretaceous(Campanian Maastrichtian)amiid(Halecomorphi:Actinopterygii)from the Fruitland Formation,San Juan Basin,New Mexico.Journal of Paleontology,63:108-115
• Hay O P.1908.Fossil turtles of North America.Carnegie Institute of Washington Publication,75:1-568
• Hayes P T.1970.Cretaceous paleogeography of southeasternArizona and adjacent areas.U S.Geological Survey Professional Paper,658-B:1-42
• Heckert A B,Lucas S G&Krzyzanowski S E.2003.Vertebratefauna of the late Campanian(Judithian)Fort CrittendenFormation,and the age of Cretaceous vertebrate faunas ofsoutheastern Arizona.Neues Jahrbuch für Geologie undPal ontologie,Abhandlungen,227:343-364
• Hernández-Rivera R&Delgado-De Jesús C.2000.Hadrosaurskin impression and associated skeletal remains from theCerro del Pueblo Fm.(uppermost Campanian)southeasternCoahuilla,Mexico.Journal of Vertebrate Paleontology,20(suppl.to no.3):48A.
• Hernández-Rivera R,Aguillón M C,Delgado-De Jesús C&Gomez N R.1995.The Mexican Dinosaur National Monument.Journal of Vertebrate Paleontology,15(suppl.to no.3):34A.
• Horner J R.1979.Upper Cretaceous dinosaurs from the Bearpaw Shale(marine)of south-central Montana with a checklist of Upper Cretaceous remains from marine sediments ofNorth America.Journal of Paleontology,53:566-577
• Horner J R.1988.A new hadrosaur(Reptilia,Ornithischia)from the Upper Cretaceous Judith River Formation of Montana.Journal of Vertebrate Paleontology,8:341-321
• Horner J R.1989.The Mesozoic terrestrial ecosystems ofMontana.In:French D E&Grabb R F eds.Geologic Resources of Montana.1989Montana Geological Society FieldConference and Symposium Guidebook.Billings:MontanaGeological Society.153-162
• Huber P,Lucas S G&Hunt A P.1993.Revised age and correlation of the Upper Triassic Chatham Group(Deep River basin,Newark Supergroup),North Carolina.Southeastern Geology,33:171-193
• Hunt A P&Lucas S G.1993.Cretaceous vertebrates of NewMexico.New Mexico Museum of Natural History and Science Bulletin,2:77-91
• Hunter J P,Heinrich R E&Weishampel D B.2010.Mammalsfrom the St.Mary River Formation(Upper Cretaceous)Montana.Journal of Vertebrate Paleontology,30:885-898
• Hutchinson J R&Chiappe L M.1998.The first known alvarezsaurid(Theropoda,Aves)from North America.Journal ofVertebrate Paleontology,18:447-450
• Ikejiri T.2005.Distribution and biochronology of Camarasaurus(Dinosauria,Sauropoda)from the Jurassic MorrisonFormation of the Rocky Mountain region.New MexicoGeological Society Guidebook,56:367-379
• Jacobs L L&Winkler D A.1998.Mammals,archosaurs,andthe Early to Late Cretaceous transition in north-centralTexas.In:Tomida Y,Flynn L J&Jacobs L L eds.Advancesin vertebrate paleontology and geochronology.NationalScience Museum Monographs,14:253-280
• Jacobs L L,Winkler D A&Murry P A.1991.On the age andcorrelation of Trinity mammals,Early Cretaceous of Texas,USA.Newsletters on Stratigraphy,24:35-43
• Jasinski S E&Sullivan R M.2011.Re-evaluation of pachycephalosaurids from the Fruitland-Kirtland transition(Kirtlandian,late Campanian),San Juan Basin,New Mexico,with a description of a new species of Stegoceras and a reassessment of Texacephale langstoni.New Mexico Museumof Natural History and Science,Bulletin53:202-215
• Jasinski S E,Sullivan R M&Lucas S G.2011.Taxonomiccomposition of th