specimen of Archaeopteryx possesses a character suite that robustly constrains it as a basal avialan (primitive bird). The specimen, which comes from the Mörnsheim Formation and is thus younger than the other specimens from the underlying Solnhofen Formation, is distinctive enough to merit designation as a new species, Archaeopteryx albersdoerferi sp. nov., but is recovered in close phylogenetic proximity to Archaeopteryx lithographica. Skeletal innovations of the Daiting specimen, such as fusion and pneumatization of the cranial bones, well vascularized pectoral girdle and wing elements, and a reinforced configuration of carpals and metacarpals, suggest that it may have had more characters seen in flying birds than the older Archaeopteryx lithographica. These innovations appear to be convergent on those of more crownward avialans, suggesting that Bavarian archaeopterygids independently acquired increasingly bird-like traits over time. Such mosaic evolution and iterative exploration of adaptive space may be typical for major functional transitions like the origin of
|Journal||Historical Biology: an international journal of paleobiology|
|Early online date||24 Oct 2018|
|Publication status||Published - 2019|
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Garwood, R., Wogelius, R., Sansom, R., Buckley, M., Chamberlain, A., Manning, P., Egerton, V., Sellers, W., Nudds, J., Bulot, L. G., Brocklehurst, R., Brassey, C. A., Keating, J., La Porta, A., Brocklehurst, R., Callender-Crowe, L., Wallace, E., Chester, J., Davenport, J., Tuley, K., Lomax, D., Reeves, J., Smart, C., Ferro, C., Karoullas, C., Heath, J., Dickson, A., Austin Sydes, L., McLean, C., Harvey, V. & Jones, K.