Sinornis

Jak číst taxoboxSinornis
Stratigrafický výskyt: Spodní křída, před 120 miliony let
alternativní popis obrázku chybí
Rekonstrukce přibližného vzezření sinornise
Vědecká klasifikace
Říšeživočichové (Animalia)
Kmenstrunatci (Chordata)
Třídaptáci (Aves)
PodtřídaEnantiornithes
RodSinornis
Sereno a Rao, 1992
Binomické jméno
Sinornis santensis
Sereno a Rao, 1992
Některá data mohou pocházet z datové položky.

Sinornis („čínský pták“) byl rod pravěkého ptáka ze skupiny Enantiornithes. Formálně byl popsán roku 1992, jedním z autorů popisu byl i americký paleontolog Paul Sereno.[1] Podobným rodem byl například Noguerornis, popsaný v roce 1989 z území Španělska.[2]

Popis

Sinornis - fosilie v expozici muzea v Pekingu.

Tito pravěcí ptáci žili v období spodní křídy (geologický věk apt, asi před 120 miliony let) na území dnešní severovýchodní Číny (provincie Liao-ning). Podle anatomických adaptací na kostře byl tento opeřenec zdatným letcem, uměl ale také šplhat a držet se na větvích stromů (hřadovat). Jedná se o prvního enantiornita, známého podle téměř kompletní kostry. Délka jeho těla činila přibližně jen 14 centimetrů, patřil tedy k malým opeřencům.[3] Jeho hmotnost pravděpodobně činila jen kolem 35 gramů[4], podle jiných odhadů asi 15 až 20 gramů[5].

Odkazy

Reference

  1. ↑ Sereno, P. C.; Rao, C. (1992). Early evolution of avian flight and perching: New evidence from the lower Cretaceous of China. Science. 255 (5046), 845.
  2. ↑ Lacasa-Ruiz, A. (1989). New genus of fossil bird from the Neocomian locality of Montsec (Lerida province, Spain). Estudios geológicos. 45 (5-6): 417-425.
  3. ↑ Holtz, Thomas R., Jr.; Rey, Luis V. (2007). Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages (Aktualizovaný internetový dodatek, str. 21). New York: Random House. ISBN 978-0-375-82419-7.
  4. ↑ Campione, N. E.; Evans, D. C. (2020). The accuracy and precision of body mass estimation in non-avian dinosaurs. Biological Reviews. doi: 10.1111/brv.12638
  5. ↑ Larramendi, A.; Paul, G. S.; Hsu, S.-y. (2020). A review and reappraisal of the specific gravities of present and past multicellular organisms, with an emphasis on tetrapods. Anatomical Record. 304 (9): 1833-1888.

Literatura

  • O'Connor, J. and Dyke, G. (2010). A reassessment of Sinornis santensis and Cathayornis yandica (Aves: Enantiornithes). Records of the Australian Museum. 62: 7–20.

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