시노코노돈

시노코노돈
화석 범위:
쥐라기 초기 193백만년 전
생물 분류ℹ️
역: 진핵생물역
계: 동물계
문: 척삭동물문
강: 단궁강
목: 수궁목
아목: 키노돈아목
(미분류): 상키노돈트류
하목: 진키노돈하목
(미분류): 프로바이노그나투스류
(미분류): 프로조소트로돈트류
(미분류): 포유양류
속: 시노코노돈
종: 시노코노돈 리네이
모식종
†Sinoconodon rigneyi
Patterson & Olson, 1961

학명이명
  • 루펑고코노돈(Lufengoconodon) Young 1982

시노코노돈(Sinoconodon)은 약 1억 9300만 년 전[1] 쥐라기 초기 중국 루펑층(Lufeng Formation)에서 발견된 키노돈트이다.

특징

시노코노돈의 두개골은 6cm로 유럽 고슴도치와 유사한 두개골로 인해 비골 전 몸 길이는 25cm, 무게는 약 800g임을 시사한다.[2] 시노코노돈은 모르가누코돈과 같은 초기 포유류와 유사하지만, 모르가누코돈류는 치열과 성장 습성이 시노코노돈과 상당히 다르며,[3] 더 원시적인 것으로 간주된다. 파충류나 양서류와 같은 대부분의 다른 포유류가 아닌 네발동물들과 마찬가지로, 시노코노돈은 평생 동안 많은 이빨을 대체하는 다환치성 동물이였으며, 죽을 때까지 지속적으로 성장한 것으로 추정된다. 따라서 모르가누코돈류나 도코돈트류와 같은 포유류형류보다 포유류와의 유사점이 적다.[4][5] 이를 바탕으로 줄기 네발동물과 포유류의 특징이 결합되어 있어 과도기 화석으로 추정한다.[6]

분류

시노코노돈은 1961년 패터슨과 올슨에 의해 이름이 지어졌다. 전체 학명은 시노코돈 리네이이다. 1961년 패터슨과 올슨에 의해 트리코노돈과에, 1988년 캐럴에 의해 시노코노돈과에, 1991년 와이블에 의해 포유양류에, 1994년 루오와 우에 의해 맘말리아에, 2004년 키엘란-자워롭스카 등에 의해 포유강에, 2001년 루오 등에 의해 포유형류에, 2014년 Bi 등에 의해 포유형류에 분류되었다.[7]

포유형류 

 아델로바실레우스

 시노코노돈

 모르가누코돈

 메가조스트로돈

 하라미아목

 할다노돈

 카스트로카우다

 하드로코디움

 포유강

각주

  1. Lucas, Spencer G. (2001). 《Chinese fossil vertebrates》. New York: Columbia University Press. ISBN 978-0-231-08482-6. 
  2. Kemp, T. S. (2005). 《The origin and evolution of mammals》. Oxford biology. Oxford ; New York: Oxford University Press. ISBN 978-0-19-850760-4. 
  3. Luo, ZX; Kielan-Jaworowska, Z; Cifelli, RL (2002). “n quest for a phylogeny of Mesozoic mammals” 47 (1): 1-78. 
  4. Kielan-Jaworowska, Zofia; Cifelli, Richard; Luo, Zhe-Xi (2004). 《Mammals from the age of dinosaurs: origins, evolution, and structure》. New York: Columbia University Press. ISBN 978-0-231-11918-4. 
  5. Close, Roger A.; Friedman, Matt; Lloyd, Graeme T.; Benson, Roger B.J. (2015년 8월). “Evidence for a Mid-Jurassic Adaptive Radiation in Mammals”. 《Current Biology》 25 (16): 2137–2142. doi:10.1016/j.cub.2015.06.047. ISSN 0960-9822. 
  6. Mammals of the Mesozoic: The least mammal-like mammals
  7. “PBDB Taxon”. 2024년 4월 6일에 확인함. 

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