Dinosaure amb plomes

Els dinosaures amb plomes es consideren fòssils de transició entre dinosaures clàssics i aus.[1][2] Era ja conegut que les aus antigues com l'Archaeopteryx tenien moltes característiques de rèptil, com a dents, i arpes en els seus dits, i molts anys abans havia estat teoritzat que els ocells descendien de dinosaures teròpodes. A la fi dels anys 1990, els descobriments de dinosaures amb plomes a la Xina van proporcionar la prova concloent de la connexió, encara que els detalls genealògics encara estiguin sent dilucidats. S'ha demostrat de moltes formes la relació de descendència entre aus i dinosaures, ja que la seva similitud morfològica quant al crani, el maluc, les potes i les extremitats superiors és molt notable. Les aus són clarament monofilétiques i els seus primers representants es troben en el Juràssic (Protoavis, un fòssil controvertit del finals del Triàsic, és considerat no avià per la majoria dels paleontòlegs).

Gèneres de dinosaures amb plomesModifica

Des de 1996 fins ara s'han descrit més de 30 gèneres de dinosaures no aviars amb ploma o protoploma preservades en llurs fòssils:

  1. Avimimus* (inferido en 1987)[3][4]
  2. Sinosauropteryx (1996)[5]
  3. Protarchaeopteryx (1997)[6]
  4. Caudipteryx (1998)[7]
  5. Rahonavis* (1998)[8]
  6. Shuvuuia* (1999)[9]
  7. Sinornithosaurus (1999)[10]
  8. Beipiaosaurus (1999)[11]
  9. Microraptor (2000)[12]
  10. Nomingia* (2000)[13]
  11. Cryptovolans (2002)[14]
  12. Scansoriopteryx (2002)[15]
  13. Epidendrosaurus (2002)[16]
  14. Psittacosaurus sp.? (2002)[17]
  15. Yixianosaurus (2003)[18]
  16. Dilong (2004)[19]
  17. Pedopenna (2005)[20]
  18. Jinfengopteryx (2005)[21][22]
  19. Juravenator (2006)[23][24]
  20. Sinocalliopteryx (2007)[25]
  21. Velociraptor* (inferido en 2007: protuberancias de cañones de plumas)[26]
  22. Epidexipteryx (2008)[27]
  23. Similicaudipteryx (inferido en 2008: pigóstilo; confirmado en 2010)[28][29]
  24. Anchiornis (2009)[30]
  25. ¿Tianyulong? (2009)[31]
  26. Concavenator corcovatus? (inferido en 2010)[32]
  27. Yutyrannus (2012)[33]
  28. Sciurumimus (2012)[34]
  29. Ornithomimus (2012)[35]
  30. Ningyuansaurus (2012)[36]
  31. Eosinopteryx (2013)[37]
  32. Citipati (inferido en 2013: pigóstilo)[38]
  33. Conchoraptor (infererido en 2013: pigóstilo)[38]
  34. Jianchangosaurus (2013)[39]
  35. Aurornis (2013; posible avial)[40]
  36. Changyuraptor (2014)[41]
  37. ¿Kulindadromeus? (2014)[42]
  38. Citipati (inferido 2014: pigóstilo)[43]
  39. Conchoraptor (inferido 2014: pigóstilo)[38]
  40. Deinocheirus (inferido en 2014: pigóstilo)[44]
  41. Yi qi (2015)[45]
  42. Zhenyuanlong (2015)[46]
  43. Dakotaraptor (inferido en 2015: protuberancias de cañones de plumas)[47]
  44. Apatoraptor (2016)
  • Noteu que les estructures filamentoses trobades en alguns dinosaures ornitisquis (Psittacosaurus, Tianyulong, Kulindadromeus) i els pterosaures poden o no ser homòlogues amb les plomes i protoplomes dels teròpodes.[31][48]

Vegeu tambéModifica


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Enllaços externsModifica

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