New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (2024)

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Subjects Abstract Access options Additional access options: Similar content being viewed by others Evidence corroborates identity of isolated fossil feather as a wing covert of Archaeopteryx New insects feeding on dinosaur feathers in mid-Cretaceous amber A new confuciusornithid bird with a secondary epiphyseal ossification reveals phylogenetic changes in confuciusornithid flight mode References Acknowledgements Author information Authors and Affiliations Contributions Corresponding author Ethics declarations Competing interests Additional information Extended data figures and tables Extended Data Figure 1 The 11th specimen of Archaeopteryx under ultraviolet light. Extended Data Figure 2 Anatomical details of the 11th skeletal specimen of Archaeopteryx. Extended Data Figure 3 Overview the plumage in the 11th specimen of Archaeopteryx. Extended Data Figure 4 Details of the plumage of the 11th specimen of Archaeopteryx. Extended Data Figure 5 Wing morphology of the 11th specimen of Archaeopteryx in dorsal view. Extended Data Figure 6 The relative rhachis diameter of the primaries of Archaeopteryx and modern birds in relation to body mass. Extended Data Figure 7 Phylogenetic hypothesis used for tracing plumage characters. Supplementary information Supplementary Information PowerPoint slides PowerPoint slide for Fig. 1 PowerPoint slide for Fig. 2 PowerPoint slide for Fig. 3 Rights and permissions About this article Cite this article This article is cited by Escape behaviors in prey and the evolution of pennaceous plumage in dinosaurs Reinterpretation of purported molting evidence in the Thermopolis Archaeopteryx Reply to: Reinterpretation of purported molting evidence in the Thermopolis Archaeopteryx Scaling trends of bird’s alular feathers in connection to leading-edge vortex flow over hand-wing Archaeopteryx feather sheaths reveal sequential center-out flight-related molting strategy Comments Editorial Summary Feathers prominent on latest Archaeopteryx fossil References
  • Letter
  • Published:
  • Christian Foth1,2,
  • Helmut Tischlinger3 &
  • Oliver W. M. Rauhut1,2

Nature volume511,pages 79–82 (2014)Cite this article

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  • Palaeontology

Abstract

Discoveries of bird-like theropod dinosaurs and basal avialans in recent decades have helped to put the iconic ‘Urvogel’ Archaeopteryx1 into context2,3,4,5,6 and have yielded important new data on the origin and early evolution of feathers7. However, the biological context under which pennaceous feathers evolved is still debated. Here we describe a new specimen of Archaeopteryx with extensive feather preservation, not only on the wings and tail, but also on the body and legs. The new specimen shows that the entire body was covered in pennaceous feathers, and that the hindlimbs had long, symmetrical feathers along the tibiotarsus but short feathers on the tarsometatarsus. Furthermore, the wing plumage demonstrates that several recent interpretations8,9 are problematic. An analysis of the phylogenetic distribution of pennaceous feathers on the tail, hindlimb and arms of advanced maniraptorans and basal avialans strongly indicates that these structures evolved in a functional context other than flight, most probably in relation to display, as suggested by some previous studies10,11,12. Pennaceous feathers thus represented an exaptation and were later, in several lineages and following different patterns, recruited for aerodynamic functions. This indicates that the origin of flight in avialans was more complex than previously thought and might have involved several convergent achievements of aerial abilities.

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New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (1)
New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (2)
New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (3)

Similar content being viewed by others

New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (4)

Evidence corroborates identity of isolated fossil feather as a wing covert of Archaeopteryx

Article Open access 30 September 2020

New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (5)

New insects feeding on dinosaur feathers in mid-Cretaceous amber

Article Open access 10 December 2019

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Acknowledgements

We thank B. Pohl for making the specimen available for study, C. Keilmann and R. Albersdörfer for assistance, Xu X. for access to material, and R. Carney, G. Mayr and A. López-Arbarello for discussions. This study was supported by the Volkswagen Foundation under grant I/84 640 (to O.W.M.R.).

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Authors and Affiliations

  1. Staatliche Naturwissenschaftliche Sammlungen Bayerns, Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straße 10, 80333 Munich, Germany,

    Christian Foth&Oliver W. M. Rauhut

  2. Department of Earth and Environmental Sciences and GeoBioCenter, Ludwig-Maximilians-Universität München, Richard-Wagner-Straße 10, 80333 Munich, Germany,

    Christian Foth&Oliver W. M. Rauhut

  3. Tannenweg 16, 85134 Stammham, Germany,

    Helmut Tischlinger

Authors

  1. Christian Foth

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  3. Oliver W. M. Rauhut

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Contributions

C.F. and O.W.M.R. designed the study, collected and analysed the data and wrote the paper; H.T. did all the photography and helped with discussions.

Corresponding author

Correspondence to Oliver W. M. Rauhut.

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Competing interests

The authors declare no competing financial interests.

Additional information

The data matrix for the phylogenetic analysis has been deposited in MorphoBank (http://www.morphobank.org) as project 1126.

Extended data figures and tables

Extended Data Figure 1 The 11th specimen of Archaeopteryx under ultraviolet light.

a, Overview photograph of the 11th skeletal specimen of Archaeopteryx. Scale bar, 5cm. b, Presacral vertebral column. Scale bar, 2cm. c, Right forelimb. Scale bar, 5cm.

Extended Data Figure 2 Anatomical details of the 11th skeletal specimen of Archaeopteryx.

a, Preserved cranial remains under ultraviolet light. Scale bar, 1cm. b, Enlargement of the tooth row of the left premaxilla in medial view under normal light. c, Pelvis under normal light. Arrow points to the impression of the (broken) ‘intermediate process’ of the ischium. Scale bar, 1cm. Abbreviations: ar, articular; il, ilium; in, incision in posterior end of jugal; is, ischium; ld, left dentary; lf, left femur; lj, left jugal; lpm, left premaxilla; pu, pubis; qjp, quadratojugal process of the jugal; rd, right dentary; rpm, right premaxilla; sa, surangular; sp, splenial.

Extended Data Figure 3 Overview the plumage in the 11th specimen of Archaeopteryx.

Colour code: yellow, body feathers from different body regions, which cannot be assigned to a certain body region; light blue, heckle feathers; sky blue, body feathers; dark blue, tibial feathers; red, femoral feathers; black, metatarsal feathers; light green, rectrices; green, remiges. Scale bar, 5cm.

Extended Data Figure 4 Details of the plumage of the 11th specimen of Archaeopteryx.

a, Primary wing feathers under ultraviolet light. b, First and second primary and first secondary wing feathers under ultraviolet light. c, Close up of the primary feathers showing the rhachides and the barbs. d, Close up of the metatarsal feathers. Scale bar, 1cm.

Extended Data Figure 5 Wing morphology of the 11th specimen of Archaeopteryx in dorsal view.

a, Rhachides of the primaries shown as yellow dashed lines. b, Imprints of the dorsal coverts marked by yellow arrows. Scale bars, 1cm.

Extended Data Figure 6 The relative rhachis diameter of the primaries of Archaeopteryx and modern birds in relation to body mass.

a, Measurements of primaries of the 11th specimen of Archaeopteryx. b, Plot of the ratio of rhachis diameter to feather length against body weight (both log transformed). Yellow dots represent feathers of the 11th specimen of Archaeopteryx; black dots represent data of modern birds; red rectangles represent data of Confuciusornithidae. See Supplementary Information for details.

Extended Data Figure 7 Phylogenetic hypothesis used for tracing plumage characters.

a, Strict consensus tree of 3,020 most parsimonious trees (tree length = 2,612; consistency index = 0.275; retention index = 0.730). b, Reduced consensus tree of the pruned data matrix after the exclusion of Shenzhousaurus, Segnosaurus, Erliansaurus, Albinykus, Saurornitholestes, Harygryphus, Tianyuraptor, Hesperonychus, Pyroraptor, Lithornis, Liaoningornis and Limneavis.

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Supplementary information

Supplementary Information

This file contains Supplementary Text 1-6, Supplementary Tables 1-2, a list of Characters 1-356 and additional References. (PDF 1909 kb)

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New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (7)

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Foth, C., Tischlinger, H. & Rauhut, O. New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers. Nature 511, 79–82 (2014). https://doi.org/10.1038/nature13467

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Editorial Summary

Feathers prominent on latest Archaeopteryx fossil

The discovery of numerous feathered dinosaurs and early birds has set the iconic 'Urvogel' (or 'first bird') Archaeopteryx in a broader context. But this venerable taxon still has the capacity to surprise. A newly discovered specimen from the Solnhofen limestone in Bavaria — only the eleventh since 1861 — shows a generous covering of feathers all over the body. Of particular note is a hindlimb covering resembling feathered 'trousers'. Analysis of feather distribution on the limbs and tail strongly suggests that pennaceous feathers — the type we are familiar with on birds today — evolved for reasons other than flight, perhaps for display.

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New specimen of Archaeopteryx provides insights into the evolution of pennaceous feathers (2024)

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