现生鸟类和孔子鸟(Confuciusornis)叉骨软骨的研究：初步分析以及对中生代鸟类飞行方式的启示

吴倩, 邹晶梅, 李志恒, 艾莉达

Cartilage on the furculae of living birds and the extinct bird Confuciusornis: a preliminary analysis and implications for flight style inferences in Mesozoic birds

WU Qian, Jingmai K. O’CONNOR, LI Zhi-Heng, Alida M. BAILLEUL

Fig. 1 Histology of the furcula-coracoid joint in the Spotted dove, the Eurasian tree sparrow and the Common swift with paraffin slides stained with a modified Masson’s trichrome A, D, G. images of the joint in the Spotted dove; B, E, H. images of the joint in the Eurasian tree sparrow; C, F, I. images of the joint in the Common swift. A-C. show the synovial joints at low resolution; D-F. close-ups on the primary cartilage on the coracoid; G-I. close-ups on the secondary cartilage on the furcula Abbreviations: CO. coracoid; CSC. calcified secondary cartilage; FT. fibrous tissue; FU. furcula; PC. primary cartilage; SC. secondary cartilage; syc. synovial cavity; sym. synovial membrane