A new Jurassic theropod from China documents a transitional step in the macrostructure of feathers - PubMed (original) (raw)

A new Jurassic theropod from China documents a transitional step in the macrostructure of feathers

Ulysse Lefèvre et al. Naturwissenschaften. 2017.

Abstract

Genuine fossils with exquisitely preserved plumage from the Late Jurassic and Early Cretaceous of northeastern China have recently revealed that bird-like theropod dinosaurs had long pennaceous feathers along their hindlimbs and may have used their four wings to glide or fly. Thus, it has been postulated that early bird flight might initially have involved four wings (Xu et al. Nature 421:335-340, 2003; Hu et al. Nature 461:640-643, 2009; Han et al. Nat Commun 5:4382, 2014). Here, we describe Serikornis sungei gen. et sp. nov., a new feathered theropod from the Tiaojishan Fm (Late Jurassic) of Liaoning Province, China. Its skeletal morphology suggests a ground-dwelling ecology with no flying adaptations. Our phylogenetic analysis places Serikornis, together with other Late Jurassic paravians from China, as a basal paravians, outside the Eumaniraptora clade. The tail of Serikornis is covered proximally by filaments and distally by slender rectrices. Thin symmetrical remiges lacking barbules are attached along its forelimbs and elongate hindlimb feathers extend up to its toes, suggesting that hindlimb remiges evolved in ground-dwelling maniraptorans before being co-opted to an arboreal lifestyle or flight.

Keywords: Barbules; Birds; Feathers; Flight evolution; Jurassic; Paraves.

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References

    1. Science. 1993 Feb 5;259(5096):790-3 - PubMed
    1. Proc Natl Acad Sci U S A. 2013 Oct 22;110(43):17404-8 - PubMed
    1. Nat Commun. 2012 Jan 24;3:637 - PubMed
    1. Nature. 2013 Mar 28;495(7442):507-11 - PubMed
    1. J Morphol. 2006 Oct;267(10):1199-226 - PubMed

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