Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A karkashin sunan phylogenetic, dinosaur yawanci ana bayyana su ne a matsayin rukuni wanda ya kunshi tsohuwar tsohuwar tsohuwar (MRCA) na Triceratops da Neornithes, da dukan zuriyarsa. An kuma ba da shawarar cewa a ayyana Dinosauria dangane da MRCA na Megalosaurus da Iguanodon, saboda waɗannan su ne biyu daga cikin jinsuna uku da Richard Owen ya ambata lokacin da ya gane Dinosauria. Dukkanin ma'anar suna haifar da nau'ikan dabbobi iri ɗaya da aka ayyana a matsayin dinosaur: "Dinosauria = Ornithischia + Saurischia", wanda ya haɗa da ankylosaurians (an yi masa kwalliya mai cin ganyayyaki masu cin ganyayyaki), stegosaurians (an yi masa kwalliya mai cin ganyayyaki), ceratopsians (masu cin ganyayyaki masu cin ganyayyaki tare da ƙaho da frills), ornithopods (bipedal ko masu cin ganyayyaki masu cin ganyayyaki ciki har da "duck-bills"), theropods (mafi yawancin carnivores masu cin ganyayyaki da tsuntsaye), da kuma sauropodomorphs (mafi yawancin manyan masu cin ganyayyaki masu cin ganyayyaki masu cin ganyayyaki tare da dogon wuyansa da wutsiyoyi). A cikin tsarin rarrabuwa na gargajiya, ana ɗaukar tsuntsaye a matsayin aji na daban wanda ya samo asali daga dinosaur, babban tsari na musamman. Duk da haka, yawancin masana ilimin halittu na zamani da ke damuwa da dinosaur sun ƙi tsarin gargajiya na rarraba don tallafawa tsarin haraji na phylogenetic; wannan tsarin yana buƙatar cewa, don ƙungiyar ta kasance ta halitta, dole ne a haɗa dukkan zuriyar membobin ƙungiyar a cikin ƙungiyar. Saboda haka ana daukar tsuntsaye dinosaur ne kuma dinosaur, saboda haka, ba su lalace ba. Ana rarraba tsuntsaye a matsayin mallakar rukuni na Maniraptora, waɗanda suke coelurosaurs, waɗanda suke theropods, waɗanda suke saurischians, waɗanda suke dinosaur.Bincike da Matthew Baron, David B. Norman, da Paul M. Barrett a cikin 2017 sun ba da shawarar sake duba tsarin dinosaur. Binciken phylogenetic da Baron et al. ya dawo da Ornithischia a matsayin mafi kusanci ga Theropoda fiye da Sauropodomorpha, sabanin haɗin gargajiya na theropods tare da sauropodomorphs. Sun tayar da clade Ornithoscelida don komawa ga kungiyar da ke dauke da Ornithischia da...  Tambaya: Mene ne dinosaur ya ƙunsa?
mafi kwanan nan magabata (MRCA) na Triceratops da Neornithes, da duk zuriyarsa