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Linyiornis, new enantiornithine bird from Lower Cretaceous of China
A new paper:
Yan Wang, Min Wang, Jingmai K. O'connor, Xiaoli Wang, Xiaoting Zheng &
Xiaomei Zhang (2016)
A new Jehol enantiornithine bird with three-dimensional preservation
and ovarian follicles.
Journal of Vertebrate Paleontology (advance online publication)
We report a new enantiornithine bird, Linyiornis amoena gen. et sp.
nov., from the Lower Cretaceous Jiufotang Formation in northeastern
China. Traces of ovarian follicles indicate that the specimen
represents a female individual. The nearly three-dimensional
preservation of the new specimen reveals morphological details rarely
visible in other Early Cretaceous enantiornithines, allowing more
detailed comparison with Late Cretaceous enantiornithines. Differences
in the preserved morphology of the right and left coracoids suggest
that the appearance of some features is strongly affected by
preservation, indicating that the distribution of these features in
compressed specimens may need to be reevaluated. Like Late Cretaceous
enantiornithine specimens, the holotype of Linyiornis amoena preserves
a hypertrophied pit for muscle attachment on the bicipital crest but
clearly did not preserve a fossa for the capital ligament, present in
Late Cretaceous taxa; we discuss the functional morphology and
implications of these features in Linyiornis amoena.