Therizinosauria

Terizinozorlar veya Therizinosauria (Yunanca:"tırpan kertenkeleleri"), Kretase döneminde Asya ve Kuzey Amerika'da yaşamış, üyelerinin ellerinde uzun, tırpan benzeri pençeler bulunan maniraptoran dinozor grubu. Terizinozorlar bilinen tüm dinozorların en tuhafıydı. En büyüğü, chalicotherler adı verilen tuhaf, soyu tükenmiş, toynaklı memelilere benziyordu. Terizinozorların bilek ve ayak parmakları, Oviraptor, Allosaurus gibi "sert kuyruklu" (tetanuran) teropodlar olduklarını gösterir.Encyclopedia of dinosaurs & prehistoric life (2008), s. 126-127. ==Keşif tarihi== sol|270x270px|küçükresim|Bulunan terizinozor kemikleri ile oluşturulmuş rekonstrüksiyonlar ve boyut karşılaştırması Uzun yıllar boyunca bilim insanları, bir prosauropod gibi dört parmaklı ayakları ve tırpan şeklindeki pençeleri içeren fosil parçalarından canlının neye benzediklerini tahmin etmek zorunda kaldılar. Paleontologlar, dev pençelerin gizemli sahibine Therizinosaurus adını verdiler. 1988'de, daha önceki bir akraba olan Alxasaurusun daha eksiksiz iskeletleri Çin'de ortaya çıktı. Bu terizinozorun kemiklerinin önceki buluntularla karşılaştırılması, bilim adamlarının "tırpan kertenkelelerini" büyük, yavaş hareket eden, iki ayaklı dinozorlar olarak hayal etmelerini sağladı. ==Filogeni== Aşağıdaki kladogram, 2010 yılında Lindsay E. Zanno tarafından yapılan Therizinosauria'nın kapsamlı filogenetik analizini takip etmektedir. Aşağıda, 2010 yılında Zanno tarafından sağlanan veriler kullanılarak Hartman ve diğerleri 2019 tarafından yakın zamanda oluşturulan filogenetik analiz yer almaktadır: == Dağılım == Terizinozorlar Doğu Asya ve Kuzey Amerika'da yaşadılar. Çoğu tür Kretase döneminde yaşadı, ancak Erken Jura'dan bir terizinozor bildirildi. == Cinslerin tanımlanma yıllarının zaman çizelgesi == ImageSize = width:1200px height:auto barincrement:15px PlotArea = left:10px bottom:50px top:10px right:10px Period = from:1824 till:2100 TimeAxis = orientation:horizontal ScaleMajor = unit:year increment:50 start:1824 ScaleMinor = unit:year increment:10 start:1824 TimeAxis = orientation:hor AlignBars = justify Colors = #legends id:CAR value:claret id:ANK value:rgb(0.4,0.3,0.196) id:HER value:teal id:HAD value:green id:OMN value:blue id:black value:black id:white value:white id:1900s value:rgb(0.94,0.25,0.24) id:2000s value:rgb(0.2,0.7,0.79) id:2000syears value:rgb(0.52,0.81,0.91) id:1900syears value:rgb(0.95,0.56,0.45) id:1700s value:rgb(0.5,0.78,0.31) id:1700syears value:rgb(0.63,0.78,0.65) id:latecretaceous value:rgb(0.74,0.82,0.37) id:1800syears value:rgb(0.95,0.98,0.11) id:paleogene value:rgb(0.99,0.6,0.32) id:paleocene value:rgb(0.99,0.65,0.37) id:eocene value:rgb(0.99,0.71,0.42) id:oligocene value:rgb(0.99,0.75,0.48) id:1800s value:rgb(0.999999,0.9,0.1) id:miocene value:rgb(0.999999,0.999999,0) id:pliocene value:rgb(0.97,0.98,0.68) id:quaternary value:rgb(0.98,0.98,0.5) id:pleistocene value:rgb(0.999999,0.95,0.68) id:holocene value:rgb(0.999,0.95,0.88) BarData= bar:eratop bar:space bar:periodtop bar:space bar:NAM1 bar:NAM2 bar:NAM3 bar:NAM4 bar:NAM5 bar:NAM6 bar:NAM7 bar:NAM8 bar:space bar:period bar:space bar:era PlotData= align:center textcolor:black fontsize:M mark:(line,black) width:25 shift:(7,-4) bar:periodtop from: 1824 till: 1830 color:1800syears text:20s from: 1830 till: 1840 color:1800syears text:30s from: 1840 till: 1850 color:1800syears text:40s from: 1850 till: 1860 color:1800syears text:50s from: 1860 till: 1870 color:1800syears text:60s from: 1870 till: 1880 color:1800syears text:70s from: 1880 till: 1890 color:1800syears text:80s from: 1890 till: 1900 color:1800syears text:90s from: 1900 till: 1910 color:1900syears text:00s from: 1910 till: 1920 color:1900syears text:10s from: 1920 till: 1930 color:1900syears text:20s from: 1930 till: 1940 color:1900syears text:30s from: 1940 till: 1950 color:1900syears text:40s from: 1950 till: 1960 color:1900syears text:50s from: 1960 till: 1970 color:1900syears text:60s from: 1970 till: 1980 color:1900syears text:70s from: 1980 till: 1990 color:1900syears text:80s from: 1990 till: 2000 color:1900syears text:90s from: 2000 till: 2010 color:2000syears text:00s from: 2010 till: 2020 color:2000syears text:10s from: 2020 till: 2030 color:2000syears text:20s from: 2030 till: 2040 color:2000syears text:30s from: 2040 till: 2050 color:2000syears text:40s from: 2050 till: 2060 color:2000syears text:50s from: 2060 till: 2070 color:2000syears text:60s from: 2070 till: 2080 color:2000syears text:70s from: 2080 till: 2090 color:2000syears text:80s from: 2090 till: 2100 color:2000syears text:90s bar:eratop from: 1824 till: 1900 color:1800s text:19th from: 1900 till: 2000 color:1900s text:20th from: 2000 till: 2100 color:2000s text:21st PlotData= align:left fontsize:M mark:(line,white) width:5 anchor:till align:left color:1900s bar:NAM3 at:2005 mark:(line,black) text:Falcarius color:1900s bar:NAM1 at:2013 mark:(line,black) text:Jianchangosaurus color:1900s bar:NAM6 at:1999 mark:(line,black) text:Beipiaosaurus color:1900s bar:NAM5 at:1994 mark:(line,black) text:Alxasaurus color:1900s bar:NAM2 at:2002 mark:(line,black) text:Erliansaurus color:1800s bar:NAM1 at:1979 mark:(line,black) text:Nanshiungosaurus color:1900s bar:NAM7 at:2001 mark:(line,black) text:Neimongosaurus color:1900s bar:NAM2 at:1979 mark:(line,black) text:Segnosaurus color:1800s bar:NAM3 at:1980 mark:(line,black) text:Erlikosaurus color:1800s bar:NAM4 at:2007 mark:(line,black) text:Suzhousaurus color:1900s bar:NAM4 at:1983 mark:(line,black) text:Enigmosaurus color:1800s bar:NAM1 at:1954 mark:(line,black) text:Therizinosaurus color:1900s bar:NAM8 at:2001 mark:(line,black) text:Nothronychus PlotData= align:center textcolor:black fontsize:M mark:(line,black) width:25 bar:period from: 1824 till: 1830 color:1800syears text:20s from: 1830 till: 1840 color:1800syears text:30s from: 1840 till: 1850 color:1800syears text:40s from: 1850 till: 1860 color:1800syears text:50s from: 1860 till: 1870 color:1800syears text:60s from: 1870 till: 1880 color:1800syears text:70s from: 1880 till: 1890 color:1800syears text:80s from: 1890 till: 1900 color:1800syears text:90s from: 1900 till: 1910 color:1900syears text:00s from: 1910 till: 1920 color:1900syears text:10s from: 1920 till: 1930 color:1900syears text:20s from: 1930 till: 1940 color:1900syears text:30s from: 1940 till: 1950 color:1900syears text:40s from: 1950 till: 1960 color:1900syears text:50s from: 1960 till: 1970 color:1900syears text:60s from: 1970 till: 1980 color:1900syears text:70s from: 1980 till: 1990 color:1900syears text:80s from: 1990 till: 2000 color:1900syears text:90s from: 2000 till: 2010 color:2000syears text:00s from: 2010 till: 2020 color:2000syears text:10s from: 2020 till: 2030 color:2000syears text:20s from: 2030 till: 2040 color:2000syears text:30s from: 2040 till: 2050 color:2000syears text:40s from: 2050 till: 2060 color:2000syears text:50s from: 2060 till: 2070 color:2000syears text:60s from: 2070 till: 2080 color:2000syears text:70s from: 2080 till: 2090 color:2000syears text:80s from: 2090 till: 2100 color:2000syears text:90s bar:era from: 1824 till: 1900 color:1800s text:19th from: 1900 till: 2000 color:1900s text:20th from: 2000 till: 2100 color:2000s text:21st == Ayrıca bakınız == * Dinozorlar listesi * Dinozorların evrimi * Oviraptorosauria == Dış bağlantılar == * * == Kaynakça == === Dipnotlar === === Kitap === * Kategori:Therizinosauria Kategori:Kretase devri dinozorları Kategori:Maniraptora Kategori:Kretase devri soy tükenmeleri