렙토케라톱스과

렙토케라톱스과
화석 범위:
백악기 후기 83.5–66백만년 전
주청고케라톱스의 두개골과 아래턱
주청고케라톱스의 두개골과 아래턱
생물 분류ℹ️
계: 동물계
문: 척삭동물문
강: 파충강
아강: 이궁아강
하강: 지배파충하강
상목: 공룡상목
목: †조반목
(미분류): †신조반류
아목: †각각아목
하목: †각룡하목
과: †렙토케라톱스과(Leptoceratopsidae)

렙토케라톱스과는 아시아와 북아메리카에서 발견된 멸종 한 신각룡류 공룡의 한 과이다. 이들은 프로토케라톱스과 및 케라톱스과와 같은 신각룡류와 가까운 관계이며 비슷하게 생겼지만, 더 원시적이고 전반적으로 더 작다. 렙토케라톱스과 공룡들은 아시아와 북아메리카의 백악기 후기 (생통주절 후기에서 마스트리흐트절 후기) 에서만 발견된다.[1] 렙토케라톱스과일 수 있는 공룡의 자뼈가 호주의 빅토리아에서 발견되어 세렌디파케라톱스라고 명명되었다. 하지만 2010년의 연구에서 이 화석이 조반류의 어떤 과에도 확실히 속한다고 말할 수 없다는 결론이 내려져 의문명으로 취급된다.[2]

렙토케라톱스과는 시대적으로 그리포케라톱스가 발견된 생통주절 후기에서부터 백악기가 끝나는 시점인 마스트리흐트절 후기에 걸쳐 분포한다. 그리포케라톱스는 산톤절에서 최초로 발견된 분명한 렙토케라톱스과 공룡이다. 그리포케라톱스는 캐나다 앨버타에서 발견된 왼쪽 하악골(dentary) 일부로부터 기재되었다. 그리포케라톱스는 가장 오래된 렙토케라톱스과 공룡이며 북아메리카에서 발견된 각룡류 공룡들 중에서 성체를 기준으로 했을 때 아마도 가장 작은 공룡이었을 것이다.[1]

계통발생

렙토케라톱스과는 원래 프란츠 놉사 폰 펠소-질바스 (Franz Nopcsa von Felső-Szilvás) 가 렙토케라톱스아과 (subfamily Leptoceratopsinae)를 명명했고 모식종은 렙토케라톱스 그라킬리스(Leptoceratops gracilis)였다. 마코비키는 2001년에 이것을 렙토케라톱스 그라킬리스를 비롯하여 트리케라톱스 호리두스보다 렙토케라톱스에 가까운 모든 종을 포함하는 줄기군 기반 분류군으로 정의하였다.[3] 아래의 분지도는 2012년에 마이클 J. 라이언, 데이비드 C. 에반스, 필립 J. 커리, 칼렙 M. 브라운, 그리고 돈 브링크만의 2012년 분석을 따른다.[1]

각룡류
 

인롱

 
 
 
 

차오양사우루스

 
 

수안후아케라톱스

 
 
 
 

프시타코사우루스과

 
신각룡류
 

리아오케라톱스

 
 
 

야마케라톱스

 
 
 

아르카이오케라톱스

 
 
 

코레아케라톱스

 
코로노사우리아
렙토케라톱스과
 

아시아케라톱스

 
 
 

케라시놉스

 
 
 

몬타노케라톱스

 
 
 

프레노케라톱스

 
 
 

렙토케라톱스

 
 

우다노케라톱스

 
 
 

주청케라톱스

 
 
 

그리포케라톱스

 
 

우네스코케라톱스

 
 
 
 
 
 
 
 
 
 

그라킬리케라톱스

 
 
프로토케라톱스과
 

바가케라톱스

 
 

프로토케라톱스

 
 
 
 

주니케라톱스

 
 

케라톱스과

 
 
 
 
 
 
 
 
 
 
 
 
21st century in paleontology20th century in paleontology19th century in paleontology2090s in paleontology2080s in paleontology2070s in paleontology2060s in paleontology2050s in paleontology2040s in paleontology2030s in paleontology2020s in paleontology2010s in paleontology2000s in paleontology1990s in paleontology1980s in paleontology1970s in paleontology1960s in paleontology1950s in paleontology1940s in paleontology1930s in paleontology1920s in paleontology1910s in paleontology1900s in paleontology1890s in paleontology1880s in paleontology1870s in paleontology1860s in paleontology1850s in paleontology1840s in paleontology1830s in paleontology1820s in paleontology우네스코케라톱스그리포케라톱스주청케라톱스우다노케라톱스렙토케라톱스프레노케라톱스몬타노케라톱스케라시놉스아시아케라톱스21st century in paleontology20th century in paleontology19th century in paleontology2090s in paleontology2080s in paleontology2070s in paleontology2060s in paleontology2050s in paleontology2040s in paleontology2030s in paleontology2020s in paleontology2010s in paleontology2000s in paleontology1990s in paleontology1980s in paleontology1970s in paleontology1960s in paleontology1950s in paleontology1940s in paleontology1930s in paleontology1920s in paleontology1910s in paleontology1900s in paleontology1890s in paleontology1880s in paleontology1870s in paleontology1860s in paleontology1850s in paleontology1840s in paleontology1830s in paleontology1820s in paleontology

각주

  1. ↑ 가 나 다 Michael J. Ryan, David C. Evans, Philip J. Currie, Caleb M. Brown and Don Brinkman (2012). “New leptoceratopsids from the Upper Cretaceous of Alberta, Canada”. Cretaceous Research 35: 69–80. doi:10.1016/j.cretres.2011.11.018. 
  2. ↑ Agnolin, F.L., Ezcurra, M.D., Pais, D.F. and Salisbury, S.W. (2010). "A reappraisal of the Cretaceous non-avian dinosaur faunas from Australia and New Zealand: Evidence for their Gondwanan affinities." Journal of Systematic Palaeontology, 8(2): 257-300.
  3. ↑ Makovicky, P.J. 2001. A Montanoceratops cerorhynchus (Dinosauria: Ceratopsia) braincase from the Horseshoe Canyon Formation of Alberta, In: Tanke, D.H. & Carpenter, K. (Eds.). Mesozoic Vertebrate Life. Bloomington: Indiana University Press. Pp. 243-262.
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