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Yixianornis

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on each wing, the longest measuring about 6.7 cm (2.6 in). Unlike in many more basal species, the feathers did not become narrower or more pointed at the tip. Rather, the feathers were very broad and rounded. There were eight tail feathers, up to 9.2 cm (3.6 in) long, anchored to
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are unique among those preserved in other Mesozoic bird specimens, and have allowed scientists to infer its probable lifestyle. The wings were broad and rounded, with similarly large, rounded feathers. The tail feathers were arranged in a graduated series, with the outer feathers anchored closer to
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was moderately sized compared to other yanornithiformes, at about the size of a chicken. IVPP V12631 was measured approximately 19 to 20 centimetres (7.5 to 7.9 in) long (excluding feathers), 11.5 centimetres (4.5 in) tall at the hips, with a wingspan of about 40 cm (16 in). Its
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These adaptations are rare among Mesozoic birds, many of which are known to have had long, pointed wings and very few, if any, long tail feathers. The rectrical bulb and plough-shaped pygostyle allowing for tail fanning is also a unique characteristic of ornithurine birds, of which
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The breastbone bore a strong keel for the attachment of flight muscles, and contained a distinct opening or fenestra, a unique characteristic of yanornithiformes. The upper and lower arm were about the same length. Like other ornithurines,
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Jingmai K. O’connor, Xuri Wang, Luis M. Chiappe, Chunling Gao, Qingjin Meng,Xiaodong Cheng, And Jinyuan Liu (2009). "Phylogenetic support for a specialized clade of Cretaceous enantiornithine birds with information from a new species"
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The hips and hind limbs preserved more primitive features than the forelimbs, supporting the idea that the modern adaptations in the locomotion seen in modern birds evolved after the many specializations needed for flight. The
495:, Zhou Zhonghe and Zhang Fucheng found that the ability to fan the tail, along with the broad wings, show that it probably preferred environments with dense vegetation, where high maneuverability in flight would be necessary. 407:
the tips of the jaws were toothless and pockmarked with small pits and grooves, possibly indicating the presence of a beak. The teeth were small and peg-like, and lacked any serrations. The lower jaw was thin and delicate.
424:, or reversed, perching toe of modern birds, is noticeably pointed backward in the fossil. However, there is no clear evidence that the bone itself was twisted, which would indicate that the toe was permanently reversed. 741:
Xu, L.; Wang, M.; Chen, R.; Dong, L.; Lin, M.; Xu, X.; Tang, J.; You, H.; Zhou, G.; Wang, L.; He, W.; Li, Y.; Zhang, C.; Zhou, Z. (2023). "A new avialan theropod from an emerging Jurassic terrestrial fauna".
376:. It is nearly complete and, unlike many other fossils, the bones are mostly uncrushed and were not split in half when the stone slabs were initially separated. It is also one of the few known Mesozoic 369: 2534: 4124: 578: 4078: 479:
the base of the tail. This would have given the tail a slightly rounded silhouette. Additionally, carbonized tissue impressions show that it had a
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was more narrow than in its relatives, and its shoulder blade was much shorter, only half the length of the upper arm bone (
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differed from related birds only in small skeletal characteristics. For example, the teeth in the lower jaw of
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Schmitz, L.; Motani, R. (2011). "Nocturnality in Dinosaurs Inferred from Scleral Ring and Orbit Morphology".
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were confined to a smaller space, while they lined more of the jaw in related species. The wishbone (
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was found to have a fan tail as well, though it may have evolved independently of modern birds.
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had a highly fused hand, with many wrist bones joined that are free in more primitive birds.
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Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages
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body weight has been estimated to have been 200 to 350 grams (0.44 to 0.77 lb).
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He, H.Y.; Wang, X.L.; Zhou, Z.H.; Wang, F.; Boven, A.; Shi, G.H.; Zhu, R.X. (2004).
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bird specimens that preserve clear impressions of the wing and tail feathers.
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29(1):188–204, March 2009# 2009 by the Society of Vertebrate Paleontology
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are well preserved in the only known specimen. There were about five
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Dinosaurs Facts and Figures: The Theropods and Other Dinosauriformes
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was the most primitive bird to display an essentially modern
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and modern birds and reptiles indicate that it may have been
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and fan of tail feathers. Later, an enantiornithine called
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Institute of Vertebrate Paleontology and Paleoanthropology
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Clarke, Julia A.; Zhou, Zhonghe; Zhang, Fucheng (2006).
368:, catalog number IVPP V12631 in the collections of the 3763: 3724: 3680: 3664: 3654: 3644: 3415: 3361: 3240: 3210: 3195: 3185: 3175: 3165: 3155: 3145: 3135: 3125: 3114: 3059: 3004: 2953: 2914: 2876: 2846: 2831: 2821: 2811: 2800: 2790: 2780: 2770: 2760: 2750: 2740: 2730: 2720: 2710: 2700: 2690: 2679: 2669: 2659: 2649: 2639: 2629: 2619: 2609: 2599: 2589: 2461: 2415: 2371: 2340: 2323: 2252: 2236: 2225: 2214: 2204: 2194: 2183: 2173: 2163: 2152: 2141: 2131: 2083: 2057: 2011: 1917: 1872: 1857: 1847: 1836: 1826: 1704: 1509: 1182: 1165: 1155: 1144: 1133: 1122: 4012: 3762: 3723: 3679: 3629: 3598: 3575: 3566: 3542: 3519: 3452: 3414: 3360: 3308: 3239: 3209: 3099: 3058: 3003: 2952: 2913: 2875: 2845: 2570: 2486: 2460: 2451: 2414: 2370: 2339: 2308: 2251: 2112: 2082: 2056: 2010: 1916: 1871: 1807: 1729: 1703: 1694: 1617: 1565: 1508: 1451: 1417: 1336: 1267: 1180: 1107: 1054: 1027: 1000: 711: 709: 707: 534:of early modern birds. Clarke et al. found that 352:, who surveyed China in the early 20th century. 491:is among the earliest known. In a 2006 study, 919: 8: 653: 651: 649: 647: 645: 643: 641: 639: 637: 635: 334:age, around 120 million years ago. Only one 720:. Princeton University Press. p. 282. 563: 561: 391:was grossly similar to its close relatives 318:period. Its remains have been found in the 4000: 3637: 3572: 3548: 3516: 3503: 3248: 3107: 2582: 2578: 2567: 2554: 2457: 2316: 2124: 2120: 1819: 1815: 1804: 1791: 1700: 1571: 1517: 1505: 1342: 1273: 1191: 1115: 1104: 1091: 1033: 1006: 997: 942: 926: 912: 904: 658:Clarke, J.A.; Zhou, Z.; Zhang, F. (2006). 344:, is known at present. The specific name, 116: 20: 857: 716:Molina-Pérez, R.; Larramendi, A. (2019). 687: 623: 348:, is named after American paleontologist 557: 584:from the original on October 2, 2022. 364:(and only specimen found to date) of 7: 4125:Early Cretaceous dinosaurs of Asia 883:Journal of Vertebrate Paleontology 14: 403:. All three had teeth, though in 3984: 3983: 3929: 3923: 3489: 3484: 2540: 2533: 2526: 1777: 1771: 1765: 850:10.1111/j.1469-7580.2006.00534.x 680:10.1111/j.1469-7580.2006.00534.x 510:, similar to most modern birds. 466:(see below) as in modern birds. 137: 896:(2004): The Theropod Database: 127:Paleozoological Museum of China 1: 4135:Fossil taxa described in 2001 568:Holtz, Thomas R. Jr. (2012). 604:Geophysical Research Letters 524:and together with this and 518:It was a close relative of 4151: 756:10.1038/s41586-023-06513-7 328:People's Republic of China 16:Extinct genus of dinosaurs 3943: 3921: 3640: 3551: 3515: 3502: 3482: 3251: 3110: 2585: 2581: 2566: 2553: 2524: 2319: 2127: 2123: 1822: 1818: 1803: 1790: 1763: 1574: 1520: 1504: 1345: 1276: 1194: 1118: 1103: 1090: 1036: 1009: 996: 941: 278: 271: 134:Scientific classification 132: 124: 115: 23: 900:. Retrieved 2013-MAR-02. 498:Comparisons between the 799:10.1126/science.1200043 449:The flight feathers of 350:Amadeus William Grabau 291:Zhou & Zhang, 2001 4092:Paleobiology Database 1663:Paralitherizinosaurus 330:) dated to the early 625:10.1029/2004GL019790 586:Winter 2011 Appendix 2880:Patagopterygiformes 2375:Confuciusornithidae 2241:Scansoriopterygidae 1876:Scansoriopterygidae 832:Yixianornis grabaui 791:2011Sci...332..705S 662:Yixianornis grabaui 616:2004GeoRL..3112605H 470:Biology and ecology 341:Yixianornis grabaui 320:Jiufotang Formation 285:Yixianornis grabaui 3008:Songlingornithidae 2957:Hongshanornithidae 2344:Omnivoropterygidae 2256:Jeholornithiformes 1567:Therizinosauroidea 838:Journal of Anatomy 668:Journal of Anatomy 236:Songlingornithidae 4107: 4106: 4006:Taxon identifiers 3997: 3996: 3939: 3938: 3919: 3918: 3915: 3914: 3819:Lutetodontopteris 3728:Gastornithiformes 3625: 3624: 3621: 3620: 3509:Aves / Neornithes 3498: 3497: 3480: 3479: 3476: 3475: 3472: 3471: 3454:Aves / Neornithes 3356: 3355: 3095: 3094: 2987:Parahongshanornis 2549: 2548: 2522: 2521: 2518: 2517: 2514: 2513: 2510: 2509: 2506: 2505: 2304: 2303: 2230:Archaeopterygidae 2108: 2107: 2015:Archaeopterygidae 1786: 1785: 1761: 1760: 1757: 1756: 1753: 1752: 1749: 1748: 1690: 1689: 1686: 1685: 1619:Therizinosauridae 1500: 1499: 1496: 1495: 1492: 1491: 1086: 1085: 1082: 1081: 1078: 1077: 1074: 1073: 986:Maniraptoriformes 898:Phylogeny of taxa 894:Mortimer, Michael 750:(7978): 336–343. 727:978-0-691-18031-1 296: 295: 4142: 4100: 4099: 4087: 4086: 4074: 4073: 4061: 4060: 4058:7EAF67B1B46DEE82 4048: 4047: 4046: 4033: 4032: 4031: 4001: 3987: 3986: 3959:Deinonychosauria 3934: 3933: 3927: 3884:Protodontopteryx 3826:Macrodontopteryx 3765: 3726: 3682: 3666: 3656: 3646: 3638: 3573: 3549: 3517: 3504: 3493: 3488: 3419:Cimolopterygidae 3417: 3363: 3310:Hesperornithidae 3249: 3242: 3212: 3197: 3187: 3177: 3167: 3157: 3147: 3137: 3127: 3116: 3108: 3061: 3006: 2955: 2916: 2878: 2848: 2833: 2823: 2813: 2802: 2792: 2782: 2772: 2762: 2752: 2742: 2732: 2722: 2712: 2702: 2692: 2681: 2671: 2661: 2651: 2641: 2631: 2621: 2611: 2601: 2591: 2583: 2579: 2568: 2555: 2544: 2538: 2537: 2530: 2463: 2458: 2419:Jinguofortisidae 2417: 2398:Eoconfuciusornis 2373: 2342: 2325: 2317: 2254: 2238: 2227: 2216: 2206: 2196: 2185: 2175: 2165: 2154: 2143: 2133: 2125: 2121: 2085: 2059: 2013: 1919: 1874: 1859: 1849: 1838: 1828: 1820: 1816: 1805: 1792: 1781: 1775: 1769: 1719:Oviraptorosauria 1708:Oviraptorosauria 1706: 1701: 1642:Nanshiungosaurus 1572: 1549:Jianchangosaurus 1518: 1511: 1506: 1343: 1274: 1192: 1186:Alvarezsauroidea 1184: 1167: 1157: 1146: 1135: 1124: 1116: 1105: 1092: 1034: 1007: 998: 991: 990: 943: 928: 921: 914: 905: 895: 886: 878: 872: 871: 861: 825: 819: 818: 774: 768: 767: 738: 732: 731: 713: 702: 701: 691: 655: 630: 629: 627: 595: 589: 588: 583: 576: 565: 474:The feathers of 455:primary feathers 305:Yixian Formation 287: 283: 247: 234: 142: 141: 120: 110: 40: 31:Early Cretaceous 29:Temporal range: 21: 4150: 4149: 4145: 4144: 4143: 4141: 4140: 4139: 4130:Jiufotang fauna 4110: 4109: 4108: 4103: 4095: 4090: 4082: 4077: 4069: 4064: 4056: 4051: 4042: 4041: 4036: 4027: 4026: 4021: 4008: 3998: 3993: 3935: 3928: 3911: 3906:Tympanonesiotes 3899:Pseudodontornis 3862:Palaeochenoides 3783:Caspiodontornis 3767:Pelagornithidae 3758: 3719: 3675: 3617: 3594: 3562: 3538: 3511: 3494: 3468: 3448: 3410: 3352: 3347:Parahesperornis 3319:Asiahesperornis 3304: 3235: 3205: 3104: 3091: 3054: 2999: 2966:Archaeornithura 2948: 2909: 2871: 2841: 2594:Archaeorhynchus 2575: 2562: 2545: 2532: 2502: 2482: 2453:Ornithothoraces 2447: 2410: 2384:Changchengornis 2366: 2335: 2313: 2300: 2247: 2219:Anchiornithidae 2117: 2104: 2078: 2072:Dromaeosauridae 2061:Dromaeosauridae 2052: 2046:Anchiornithidae 2006: 1965:Liaoningvenator 1921:Anchiornithidae 1912: 1900:Scansoriopteryx 1867: 1812: 1799: 1782: 1745: 1725: 1682: 1677:Therizinosaurus 1613: 1561: 1556:Lingyuanosaurus 1513:Therizinosauria 1488: 1447: 1413: 1338:Parvicursorinae 1332: 1269:Alvarezsauridae 1263: 1188: 1176: 1112: 1099: 1070: 1050: 1023: 1017:Avemetatarsalia 1002:Avemetatarsalia 992: 948: 947: 937: 932: 893: 890: 889: 879: 875: 827: 826: 822: 785:(6030): 705–8. 776: 775: 771: 740: 739: 735: 728: 715: 714: 705: 657: 656: 633: 597: 596: 592: 581: 574: 567: 566: 559: 554: 516: 472: 358: 314:from the early 292: 289: 281: 280: 267: 264:Y. grabaui 245: 232: 136: 125:Type specimen, 111: 109: 108: 107: 106: 101: 96: 91: 86: 81: 76: 71: 66: 61: 56: 51: 46: 35: 34: 27: 17: 12: 11: 5: 4148: 4146: 4138: 4137: 4132: 4127: 4122: 4112: 4111: 4105: 4104: 4102: 4101: 4088: 4075: 4062: 4049: 4034: 4018: 4016: 4010: 4009: 4004: 3995: 3994: 3992: 3991: 3981: 3976: 3971: 3966: 3961: 3956: 3951: 3949:Archaeornithes 3944: 3941: 3940: 3937: 3936: 3922: 3920: 3917: 3916: 3913: 3912: 3910: 3909: 3902: 3895: 3891:Protopelicanus 3887: 3880: 3872: 3865: 3858: 3855:Osteodontornis 3851: 3844: 3837: 3829: 3822: 3815: 3807: 3800: 3793: 3786: 3779: 3771: 3769: 3760: 3759: 3757: 3756: 3752:Dromornithidae 3748: 3741: 3732: 3730: 3721: 3720: 3718: 3717: 3710: 3703: 3696: 3688: 3686: 3684:Dromornithidae 3677: 3676: 3674: 3673: 3662: 3659:Perplexicervix 3652: 3641: 3635: 3632:Incertae sedis 3627: 3626: 3623: 3622: 3619: 3618: 3616: 3615: 3614: 3613: 3611:Pangalliformes 3604: 3602: 3600:Pangalliformes 3596: 3595: 3593: 3592: 3591: 3590: 3581: 3579: 3570: 3564: 3563: 3561: 3560: 3552: 3546: 3540: 3539: 3537: 3536: 3535: 3534: 3525: 3523: 3513: 3512: 3507: 3500: 3499: 3496: 3495: 3483: 3481: 3478: 3477: 3474: 3473: 3470: 3469: 3467: 3466: 3465: 3464: 3458: 3456: 3450: 3449: 3447: 3446: 3438: 3431: 3423: 3421: 3412: 3411: 3409: 3408: 3401: 3394: 3386: 3378: 3369: 3367: 3358: 3357: 3354: 3353: 3351: 3350: 3343: 3336: 3329: 3322: 3314: 3312: 3306: 3305: 3303: 3302: 3295: 3288: 3281: 3274: 3267: 3260: 3252: 3246: 3244:Hesperornithes 3237: 3236: 3234: 3233: 3226: 3218: 3216: 3214:Ichthyornithes 3207: 3206: 3204: 3203: 3193: 3183: 3173: 3163: 3153: 3143: 3133: 3123: 3111: 3105: 3100: 3097: 3096: 3093: 3092: 3090: 3089: 3082: 3079:Similiyanornis 3075: 3067: 3065: 3056: 3055: 3053: 3052: 3044: 3036: 3029: 3021: 3012: 3010: 3001: 3000: 2998: 2997: 2990: 2983: 2976: 2969: 2961: 2959: 2950: 2949: 2947: 2946: 2938: 2930: 2922: 2920: 2918:Ambiortiformes 2911: 2910: 2908: 2907: 2900: 2892: 2884: 2882: 2873: 2872: 2870: 2869: 2862: 2854: 2852: 2843: 2842: 2840: 2839: 2836:Zhongjianornis 2829: 2819: 2809: 2798: 2788: 2778: 2768: 2758: 2748: 2738: 2728: 2725:Jianchangornis 2718: 2708: 2698: 2688: 2677: 2667: 2657: 2647: 2637: 2627: 2617: 2607: 2597: 2586: 2576: 2571: 2564: 2563: 2558: 2551: 2550: 2547: 2546: 2525: 2523: 2520: 2519: 2516: 2515: 2512: 2511: 2508: 2507: 2504: 2503: 2501: 2500: 2499: 2498: 2492: 2490: 2484: 2483: 2481: 2480: 2479: 2478: 2476:Enantiornithes 2469: 2467: 2465:Enantiornithes 2455: 2449: 2448: 2446: 2445: 2438: 2431: 2423: 2421: 2412: 2411: 2409: 2408: 2401: 2394: 2391:Confuciusornis 2387: 2379: 2377: 2368: 2367: 2365: 2364: 2357: 2354:Omnivoropteryx 2349: 2347: 2337: 2336: 2334: 2333: 2320: 2314: 2309: 2306: 2305: 2302: 2301: 2299: 2298: 2291: 2284: 2276: 2269: 2260: 2258: 2249: 2248: 2246: 2245: 2234: 2223: 2212: 2202: 2192: 2181: 2171: 2161: 2150: 2139: 2128: 2118: 2113: 2110: 2109: 2106: 2105: 2103: 2102: 2101: 2100: 2091: 2089: 2080: 2079: 2077: 2076: 2075: 2074: 2065: 2063: 2054: 2053: 2051: 2050: 2042: 2035: 2028: 2019: 2017: 2008: 2007: 2005: 2004: 1997: 1990: 1983: 1976: 1969: 1961: 1954: 1947: 1940: 1933: 1925: 1923: 1914: 1913: 1911: 1910: 1903: 1896: 1889: 1881: 1879: 1869: 1868: 1866: 1865: 1855: 1852:Pneumatoraptor 1845: 1834: 1823: 1813: 1808: 1801: 1800: 1795: 1788: 1787: 1784: 1783: 1764: 1762: 1759: 1758: 1755: 1754: 1751: 1750: 1747: 1746: 1744: 1743: 1742: 1741: 1735: 1733: 1727: 1726: 1724: 1723: 1722: 1721: 1712: 1710: 1698: 1692: 1691: 1688: 1687: 1684: 1683: 1681: 1680: 1673: 1666: 1659: 1652: 1649:Neimongosaurus 1645: 1638: 1631: 1623: 1621: 1615: 1614: 1612: 1611: 1604: 1597: 1590: 1583: 1575: 1569: 1563: 1562: 1560: 1559: 1552: 1545: 1537: 1530: 1521: 1515: 1502: 1501: 1498: 1497: 1494: 1493: 1490: 1489: 1487: 1486: 1479: 1472: 1465: 1457: 1455: 1449: 1448: 1446: 1445: 1438: 1431: 1423: 1421: 1415: 1414: 1412: 1411: 1408:Trierarchuncus 1404: 1397: 1390: 1383: 1376: 1368: 1361: 1354: 1346: 1340: 1334: 1333: 1331: 1330: 1322: 1315: 1308: 1304:Bonapartenykus 1300: 1293: 1286: 1277: 1271: 1265: 1264: 1262: 1261: 1254: 1246: 1243:Shishugounykus 1239: 1232: 1225: 1222:Bonapartenykus 1218: 1211: 1203: 1195: 1189: 1181: 1178: 1177: 1175: 1174: 1163: 1153: 1142: 1131: 1119: 1113: 1108: 1101: 1100: 1095: 1088: 1087: 1084: 1083: 1080: 1079: 1076: 1075: 1072: 1071: 1069: 1068: 1067: 1066: 1060: 1058: 1052: 1051: 1049: 1048: 1047: 1046: 1037: 1031: 1025: 1024: 1022: 1021: 1020: 1019: 1010: 1004: 994: 993: 989: 988: 979: 970: 961: 955: 946: 939: 938: 933: 931: 930: 923: 916: 908: 902: 901: 888: 887: 873: 844:(3): 287–308. 820: 769: 733: 726: 703: 674:(3): 287–308. 631: 590: 556: 555: 553: 550: 515: 514:Classification 512: 481:rectrical bulb 471: 468: 464:rectrical bulb 357: 354: 294: 293: 290: 276: 275: 269: 268: 260: 258: 254: 253: 243: 239: 238: 230: 226: 225: 220: 213: 212: 207: 200: 199: 194: 187: 186: 181: 174: 173: 168: 164: 163: 158: 154: 153: 148: 144: 143: 130: 129: 122: 121: 113: 112: 104: 103: 102: 97: 92: 87: 82: 77: 72: 67: 62: 57: 52: 47: 42: 41: 28: 15: 13: 10: 9: 6: 4: 3: 2: 4147: 4136: 4133: 4131: 4128: 4126: 4123: 4121: 4118: 4117: 4115: 4098: 4093: 4089: 4085: 4080: 4076: 4072: 4067: 4063: 4059: 4054: 4050: 4045: 4039: 4035: 4030: 4024: 4020: 4019: 4017: 4015: 4011: 4007: 4002: 3990: 3982: 3980: 3977: 3975: 3972: 3970: 3969:Odontornithes 3967: 3965: 3964:Odontognathae 3962: 3960: 3957: 3955: 3952: 3950: 3946: 3945: 3942: 3932: 3926: 3908: 3907: 3903: 3901: 3900: 3896: 3893: 3892: 3888: 3886: 3885: 3881: 3878: 3877: 3873: 3871: 3870: 3866: 3864: 3863: 3859: 3857: 3856: 3852: 3850: 3849: 3845: 3843: 3842: 3838: 3835: 3834: 3830: 3828: 3827: 3823: 3821: 3820: 3816: 3813: 3812: 3808: 3806: 3805: 3801: 3799: 3798: 3794: 3792: 3791: 3787: 3785: 3784: 3780: 3778: 3777: 3773: 3772: 3770: 3768: 3761: 3754: 3753: 3749: 3747: 3746: 3742: 3739: 3738: 3734: 3733: 3731: 3729: 3722: 3716: 3715: 3711: 3709: 3708: 3704: 3702: 3701: 3697: 3695: 3694: 3693:Barawertornis 3690: 3689: 3687: 3685: 3678: 3671: 3670: 3663: 3661: 3660: 3653: 3651: 3650: 3643: 3642: 3639: 3636: 3634: 3633: 3628: 3612: 3608: 3607: 3606: 3605: 3603: 3601: 3597: 3589: 3588:Anserimorphae 3585: 3584: 3583: 3582: 3580: 3578: 3577:Anserimorphae 3574: 3571: 3569: 3565: 3559: 3558: 3554: 3553: 3550: 3547: 3545: 3541: 3533: 3532:Palaeognathae 3529: 3528: 3527: 3526: 3524: 3522: 3521:Palaeognathae 3518: 3514: 3510: 3505: 3501: 3492: 3487: 3462: 3461: 3460: 3459: 3457: 3455: 3451: 3444: 3443: 3439: 3437: 3436: 3432: 3430: 3429: 3425: 3424: 3422: 3420: 3413: 3407: 3406: 3402: 3400: 3399: 3395: 3392: 3391: 3387: 3384: 3383: 3379: 3376: 3375: 3371: 3370: 3368: 3366: 3359: 3349: 3348: 3344: 3342: 3341: 3337: 3335: 3334: 3330: 3328: 3327: 3323: 3321: 3320: 3316: 3315: 3313: 3311: 3307: 3301: 3300: 3296: 3294: 3293: 3289: 3287: 3286: 3282: 3280: 3279: 3275: 3273: 3272: 3268: 3266: 3265: 3261: 3259: 3258: 3254: 3253: 3250: 3247: 3245: 3238: 3232: 3231: 3227: 3225: 3224: 3220: 3219: 3217: 3215: 3208: 3202: 3201: 3200:Tingmiatornis 3194: 3192: 3191: 3184: 3182: 3181: 3174: 3172: 3171: 3164: 3162: 3161: 3154: 3152: 3151: 3144: 3142: 3141: 3134: 3132: 3131: 3124: 3121: 3120: 3119:Antarcticavis 3113: 3112: 3109: 3106: 3103: 3098: 3088: 3087: 3083: 3081: 3080: 3076: 3074: 3073: 3069: 3068: 3066: 3064: 3063:Yanornithidae 3057: 3050: 3049: 3045: 3042: 3041: 3037: 3035: 3034: 3033:Songlingornis 3030: 3027: 3026: 3022: 3019: 3018: 3014: 3013: 3011: 3009: 3002: 2996: 2995: 2991: 2989: 2988: 2984: 2982: 2981: 2980:Longicrusavis 2977: 2975: 2974: 2973:Hongshanornis 2970: 2968: 2967: 2963: 2962: 2960: 2958: 2951: 2944: 2943: 2939: 2936: 2935: 2931: 2929: 2928: 2924: 2923: 2921: 2919: 2912: 2906: 2905: 2901: 2898: 2897: 2893: 2891: 2890: 2886: 2885: 2883: 2881: 2874: 2868: 2867: 2863: 2861: 2860: 2859:Mengciusornis 2856: 2855: 2853: 2851: 2850:Schizoouridae 2844: 2838: 2837: 2830: 2828: 2827: 2820: 2818: 2817: 2810: 2807: 2806: 2799: 2797: 2796: 2789: 2787: 2786: 2779: 2777: 2776: 2769: 2767: 2766: 2759: 2757: 2756: 2749: 2747: 2746: 2739: 2737: 2736: 2729: 2727: 2726: 2719: 2717: 2716: 2709: 2707: 2706: 2699: 2697: 2696: 2689: 2686: 2685: 2678: 2676: 2675: 2668: 2666: 2665: 2658: 2656: 2655: 2648: 2646: 2645: 2638: 2636: 2635: 2634:Changzuiornis 2628: 2626: 2625: 2618: 2616: 2615: 2614:Brevidentavis 2608: 2606: 2605: 2598: 2596: 2595: 2588: 2587: 2584: 2580: 2577: 2574: 2569: 2565: 2561: 2556: 2552: 2543: 2539: 2536: 2529: 2496: 2495: 2494: 2493: 2491: 2489: 2485: 2477: 2473: 2472: 2471: 2470: 2468: 2466: 2459: 2456: 2454: 2450: 2444: 2443: 2439: 2437: 2436: 2432: 2430: 2429: 2425: 2424: 2422: 2420: 2413: 2407: 2406: 2402: 2400: 2399: 2395: 2393: 2392: 2388: 2386: 2385: 2381: 2380: 2378: 2376: 2369: 2363: 2362: 2358: 2356: 2355: 2351: 2350: 2348: 2345: 2338: 2332: 2330: 2322: 2321: 2318: 2315: 2312: 2307: 2297: 2296: 2292: 2290: 2289: 2285: 2282: 2281: 2277: 2275: 2274: 2270: 2267: 2266: 2262: 2261: 2259: 2257: 2250: 2243: 2242: 2235: 2232: 2231: 2224: 2221: 2220: 2213: 2211: 2210: 2203: 2201: 2200: 2193: 2190: 2189: 2182: 2180: 2179: 2172: 2170: 2169: 2162: 2159: 2158: 2157:Cretaaviculus 2151: 2148: 2147: 2140: 2138: 2137: 2130: 2129: 2126: 2122: 2119: 2116: 2111: 2099: 2095: 2094: 2093: 2092: 2090: 2088: 2081: 2073: 2069: 2068: 2067: 2066: 2064: 2062: 2055: 2048: 2047: 2043: 2041: 2040: 2036: 2034: 2033: 2032:Archaeopteryx 2029: 2026: 2025: 2021: 2020: 2018: 2016: 2009: 2003: 2002: 2001:Yixianosaurus 1998: 1996: 1995: 1991: 1989: 1988: 1984: 1982: 1981: 1977: 1975: 1974: 1970: 1967: 1966: 1962: 1960: 1959: 1958:Fujianvenator 1955: 1953: 1952: 1948: 1946: 1945: 1941: 1939: 1938: 1934: 1932: 1931: 1927: 1926: 1924: 1922: 1915: 1909: 1908: 1904: 1902: 1901: 1897: 1895: 1894: 1893:Epidexipteryx 1890: 1888: 1887: 1883: 1882: 1880: 1877: 1870: 1864: 1863: 1856: 1854: 1853: 1846: 1843: 1842: 1835: 1833: 1832: 1825: 1824: 1821: 1817: 1814: 1811: 1806: 1802: 1798: 1793: 1789: 1780: 1776: 1774: 1768: 1739: 1738: 1737: 1736: 1734: 1732: 1728: 1720: 1716: 1715: 1714: 1713: 1711: 1709: 1702: 1699: 1697: 1693: 1679: 1678: 1674: 1672: 1671: 1667: 1665: 1664: 1660: 1658: 1657: 1653: 1651: 1650: 1646: 1644: 1643: 1639: 1637: 1636: 1632: 1630: 1629: 1625: 1624: 1622: 1620: 1616: 1610: 1609: 1605: 1603: 1602: 1598: 1596: 1595: 1591: 1589: 1588: 1587:Beipiaosaurus 1584: 1582: 1581: 1577: 1576: 1573: 1570: 1568: 1564: 1558: 1557: 1553: 1551: 1550: 1546: 1543: 1542: 1538: 1536: 1535: 1531: 1528: 1527: 1523: 1522: 1519: 1516: 1514: 1507: 1503: 1485: 1484: 1480: 1478: 1477: 1473: 1471: 1470: 1466: 1464: 1463: 1459: 1458: 1456: 1454: 1450: 1444: 1443: 1439: 1437: 1436: 1432: 1430: 1429: 1425: 1424: 1422: 1420: 1416: 1410: 1409: 1405: 1403: 1402: 1398: 1396: 1395: 1391: 1389: 1388: 1384: 1382: 1381: 1377: 1374: 1373: 1369: 1367: 1366: 1362: 1360: 1359: 1355: 1353: 1352: 1348: 1347: 1344: 1341: 1339: 1335: 1328: 1327: 1323: 1321: 1320: 1319:Heptasteornis 1316: 1314: 1313: 1309: 1306: 1305: 1301: 1299: 1298: 1297:Alvarezsaurus 1294: 1292: 1291: 1287: 1284: 1283: 1282:Achillesaurus 1279: 1278: 1275: 1272: 1270: 1266: 1260: 1259: 1255: 1252: 1251: 1247: 1245: 1244: 1240: 1238: 1237: 1233: 1231: 1230: 1226: 1224: 1223: 1219: 1217: 1216: 1212: 1209: 1208: 1204: 1202: 1201: 1200:Achillesaurus 1197: 1196: 1193: 1190: 1187: 1179: 1172: 1171: 1164: 1162: 1161: 1154: 1151: 1150: 1143: 1140: 1139: 1132: 1129: 1128: 1121: 1120: 1117: 1114: 1111: 1106: 1102: 1098: 1093: 1089: 1064: 1063: 1062: 1061: 1059: 1057: 1053: 1045: 1041: 1040: 1039: 1038: 1035: 1032: 1030: 1026: 1018: 1014: 1013: 1012: 1011: 1008: 1005: 1003: 999: 995: 987: 983: 980: 978: 974: 971: 969: 965: 962: 960: 956: 954: 950: 949: 944: 940: 936: 929: 924: 922: 917: 915: 910: 909: 906: 899: 892: 891: 884: 877: 874: 869: 865: 860: 855: 851: 847: 843: 839: 835: 833: 824: 821: 816: 812: 808: 804: 800: 796: 792: 788: 784: 780: 773: 770: 765: 761: 757: 753: 749: 745: 737: 734: 729: 723: 719: 712: 710: 708: 704: 699: 695: 690: 685: 681: 677: 673: 669: 665: 663: 654: 652: 650: 648: 646: 644: 642: 640: 638: 636: 632: 626: 621: 617: 613: 609: 605: 601: 594: 591: 587: 580: 573: 572: 564: 562: 558: 551: 549: 547: 546: 541: 537: 533: 529: 528: 527:Songlingornis 523: 522: 513: 511: 509: 505: 501: 500:scleral rings 496: 494: 490: 484: 482: 477: 469: 467: 465: 461: 456: 452: 447: 445: 441: 437: 433: 429: 425: 423: 417: 415: 409: 406: 402: 401: 400:Songlingornis 396: 395: 390: 385: 381: 379: 375: 371: 367: 363: 362:type specimen 355: 353: 351: 347: 343: 342: 337: 333: 329: 325: 321: 317: 313: 310: 306: 302: 301: 288: 286: 277: 274: 273:Binomial name 270: 266: 265: 259: 256: 255: 252: 251: 244: 241: 240: 237: 231: 228: 227: 224: 221: 218: 215: 214: 211: 208: 205: 202: 201: 198: 195: 192: 189: 188: 185: 182: 179: 176: 175: 172: 169: 166: 165: 162: 159: 156: 155: 152: 149: 146: 145: 140: 135: 131: 128: 123: 119: 114: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 50: 45: 39: 32: 26: 22: 19: 4120:Euornitheans 4013: 3979:Unenlagiidae 3904: 3897: 3889: 3882: 3874: 3867: 3860: 3853: 3846: 3841:Odontopteryx 3839: 3831: 3824: 3817: 3809: 3802: 3795: 3788: 3781: 3774: 3750: 3743: 3735: 3712: 3705: 3698: 3691: 3667: 3657: 3647: 3630: 3568:Galloanserae 3555: 3442:Lamarqueavis 3440: 3435:Cimolopteryx 3433: 3426: 3403: 3396: 3388: 3380: 3374:Australornis 3372: 3345: 3338: 3331: 3324: 3317: 3297: 3292:Pasquiaornis 3290: 3283: 3276: 3269: 3262: 3255: 3228: 3221: 3198: 3188: 3178: 3168: 3158: 3148: 3138: 3128: 3117: 3084: 3077: 3070: 3047: 3046: 3038: 3031: 3025:Piscivoravis 3023: 3015: 2992: 2985: 2978: 2971: 2964: 2940: 2932: 2925: 2904:Patagopteryx 2902: 2894: 2887: 2864: 2857: 2834: 2824: 2816:Xinghaiornis 2814: 2803: 2793: 2783: 2773: 2765:Khinganornis 2763: 2753: 2743: 2735:Jiuquanornis 2733: 2723: 2713: 2703: 2693: 2684:Gargantuavis 2682: 2672: 2662: 2652: 2642: 2632: 2624:Changmaornis 2622: 2612: 2602: 2592: 2531: 2442:Jinguofortis 2440: 2433: 2426: 2403: 2396: 2389: 2382: 2359: 2352: 2326: 2295:Neimengornis 2293: 2286: 2280:Jixiangornis 2278: 2271: 2265:Dalianraptor 2263: 2239: 2228: 2217: 2207: 2199:Yandangornis 2197: 2186: 2176: 2166: 2155: 2144: 2134: 2098:Troodontidae 2087:Troodontidae 2044: 2039:Wellnhoferia 2037: 2030: 2022: 1999: 1992: 1985: 1978: 1971: 1963: 1956: 1951:Eosinopteryx 1949: 1942: 1935: 1928: 1905: 1898: 1891: 1884: 1860: 1850: 1841:Palaeopteryx 1839: 1829: 1770: 1696:Pennaraptora 1675: 1668: 1661: 1656:Nothronychus 1654: 1647: 1640: 1635:Erlikosaurus 1633: 1628:Erliansaurus 1626: 1608:Suzhousaurus 1606: 1601:Martharaptor 1599: 1594:Enigmosaurus 1592: 1585: 1578: 1554: 1547: 1541:Fukuivenator 1539: 1532: 1526:Eshanosaurus 1524: 1481: 1474: 1467: 1462:Albertonykus 1460: 1440: 1433: 1426: 1419:Ceratonykini 1406: 1399: 1392: 1385: 1380:Nemegtonykus 1378: 1370: 1363: 1356: 1349: 1324: 1317: 1310: 1302: 1295: 1288: 1280: 1256: 1250:Tugulusaurus 1248: 1241: 1234: 1229:Haplocheirus 1227: 1220: 1213: 1205: 1198: 1168: 1160:Migmanychion 1158: 1147: 1138:Fukuivenator 1136: 1125: 981: 972: 963: 882: 876: 841: 837: 831: 823: 782: 778: 772: 747: 743: 736: 717: 671: 667: 661: 610:(13): 1709. 607: 603: 593: 585: 570: 543: 535: 525: 519: 517: 503: 497: 493:Julia Clarke 488: 485: 480: 475: 473: 463: 450: 448: 443: 439: 435: 431: 427: 426: 421: 418: 413: 410: 404: 398: 392: 388: 383: 382: 365: 359: 345: 340: 339: 307:bird") is a 299: 298: 297: 284: 279: 263: 262: 249: 248: 216: 203: 190: 177: 24: 18: 4044:Yixianornis 4038:Wikispecies 4014:Yixianornis 3876:Proceriavis 3848:Odontoptila 3804:Gigantornis 3714:Ilbandornis 3649:Asteriornis 3390:Neogaeornis 3340:Hesperornis 3271:Chupkaornis 3223:Ichthyornis 3048:Yixianornis 2994:Tianyuornis 2942:Palintropus 2889:Alamitornis 2775:Meemannavis 2745:Juehuaornis 2664:Eogranivora 2604:Bellulornis 2428:Chongmingia 2178:Overoraptor 2168:Fukuipteryx 1831:Imperobator 1670:Segnosaurus 1435:Ceratonykus 1394:Parvicursor 1365:Khulsanurus 1358:Jaculinykus 1326:Patagonykus 1236:Patagonykus 1170:Yaverlandia 1110:Maniraptora 1097:Maniraptora 1056:Maniraptora 935:Maniraptora 545:Shanweiniao 536:Yixianornis 504:Yixianornis 489:Yixianornis 476:Yixianornis 451:Yixianornis 440:Yixianornis 432:Yixianornis 428:Yixianornis 414:Yixianornis 405:Yixianornis 389:Yixianornis 384:Yixianornis 374:Jehol group 366:Yixianornis 356:Description 300:Yixianornis 250:Yixianornis 25:Yixianornis 4114:Categories 3947:See also: 3869:Pelagornis 3737:Brontornis 3544:Neognathae 3463:see below↓ 3428:Ceramornis 3398:Polarornis 3365:Vegaviidae 3333:Fumicollis 3299:Potamornis 3285:Judinornis 3278:Enaliornis 3102:Ornithurae 3072:Abitusavis 2866:Schizooura 2826:Yumenornis 2785:Platanavis 2755:Kaririavis 2705:Horezmavis 2644:Chaoyangia 2573:Euornithes 2560:Euornithes 2497:see below↓ 2488:Euornithes 2435:Cratonavis 2311:Pygostylia 2288:Kompsornis 2273:Jeholornis 2209:Zhongornis 2136:Alcmonavis 2024:Alcmonavis 1994:Xiaotingia 1987:Serikornis 1930:Anchiornis 1886:Ambopteryx 1740:see below↓ 1580:Alxasaurus 1469:Linhenykus 1453:Mononykini 1442:Xixianykus 1401:Qiupanykus 1387:Ondogurvel 1351:Dzharaonyx 1312:Bradycneme 1290:Alnashetri 1065:see below↓ 968:Dinosauria 552:References 378:ornithuran 316:Cretaceous 303:(meaning " 197:Saurischia 184:Dinosauria 3974:Sauriurae 3954:Carinatae 3790:Cyphornis 3776:Aequornis 3745:Gastornis 3707:Genyornis 3700:Dromornis 3257:Baptornis 3190:Limenavis 3170:Iaceornis 3160:Guildavis 3150:Gallornis 3140:Cerebavis 3130:Apatornis 2934:Apsaravis 2927:Ambiortus 2896:Kuszholia 2361:Sapeornis 2188:Rahonavis 1980:Pedopenna 1862:Rahonavis 1534:Falcarius 1476:Mononykus 1428:Albinykus 1258:Xiyunykus 1127:Elopteryx 1044:Theropoda 1029:Theropoda 977:Theropoda 951:Kingdom: 764:1476-4687 540:pygostyle 460:pygostyle 257:Species: 210:Theropoda 157:Kingdom: 151:Eukaryota 36:120  4071:52571607 4023:Wikidata 3989:Category 3797:Dasornis 3669:Qinornis 3326:Canadaga 3264:Brodavis 3086:Yanornis 3040:Yanornis 3017:Hollanda 2715:Iteravis 2695:Hollanda 2654:Dingavis 2405:Yangavis 2329:Proornis 1973:Ostromia 1937:Aurornis 1483:Shuvuuia 1215:Bannykus 959:Chordata 957:Phylum: 953:Animalia 868:16533313 815:33253407 807:21493820 698:16533313 579:Archived 530:forms a 521:Yanornis 394:Yanornis 324:Chaoyang 229:Family: 171:Chordata 167:Phylum: 161:Animalia 147:Domain: 4084:4849268 4053:Avibase 4029:Q310304 3811:Laornis 3557:Neoaves 3405:Vegavis 3230:Janavis 2805:Wyleyia 2115:Avialae 1944:Caihong 1810:Paraves 1797:Paraves 1731:Paraves 859:2100246 787:Bibcode 779:Science 689:2100246 612:Bibcode 508:diurnal 444:humerus 436:furcula 346:grabaui 336:species 282:† 261:† 242:Genus: 223:Avialae 105:↓ 4097:119338 3382:Maaqwi 3180:Kookne 2795:Vorona 2674:Gansus 2146:Balaur 1149:Kakuru 866:  856:  813:  805:  762:  744:Nature 724:  696:  686:  422:hallux 332:Aptian 1207:Aorun 982:Clade 973:Clade 964:Clade 811:S2CID 582:(PDF) 575:(PDF) 532:clade 438:) of 312:genus 217:Clade 204:Clade 191:Clade 178:Clade 4079:GBIF 3833:Manu 3609:see 3586:see 3530:see 2474:see 2096:see 2070:see 1717:see 1042:see 1015:see 864:PMID 803:PMID 760:ISSN 722:ISBN 694:PMID 462:and 397:and 360:The 309:bird 44:PreꞒ 4066:EoL 1372:Kol 854:PMC 846:doi 842:208 795:doi 783:332 752:doi 748:621 684:PMC 676:doi 672:208 620:doi 502:of 446:). 322:at 4116:: 4094:: 4081:: 4068:: 4055:: 4040:: 4025:: 1907:Yi 984:: 975:: 966:: 862:. 852:. 840:. 836:. 809:. 801:. 793:. 781:. 758:. 746:. 706:^ 692:. 682:. 670:. 666:. 634:^ 618:. 608:31 606:. 602:. 577:. 560:^ 458:a 338:, 219:: 206:: 193:: 180:: 94:Pg 38:Ma 33:, 3894:? 3879:? 3836:? 3814:? 3764:† 3755:? 3740:? 3725:† 3681:† 3672:? 3665:† 3655:† 3645:† 3445:? 3416:† 3393:? 3385:? 3377:? 3362:† 3241:† 3211:† 3196:† 3186:† 3176:† 3166:† 3156:† 3146:† 3136:† 3126:† 3122:? 3115:† 3060:† 3051:? 3043:? 3028:? 3020:? 3005:† 2954:† 2945:? 2937:? 2915:† 2899:? 2877:† 2847:† 2832:† 2822:† 2812:† 2808:? 2801:† 2791:† 2781:† 2771:† 2761:† 2751:† 2741:† 2731:† 2721:† 2711:† 2701:† 2691:† 2687:? 2680:† 2670:† 2660:† 2650:† 2640:† 2630:† 2620:† 2610:† 2600:† 2590:† 2462:† 2416:† 2372:† 2346:? 2341:† 2331:" 2327:" 2324:† 2283:? 2268:? 2253:† 2244:? 2237:† 2233:? 2226:† 2222:? 2215:† 2205:† 2195:† 2191:? 2184:† 2174:† 2164:† 2160:? 2153:† 2149:? 2142:† 2132:† 2084:† 2058:† 2049:? 2027:? 2012:† 1968:? 1918:† 1878:? 1873:† 1858:† 1848:† 1844:? 1837:† 1827:† 1705:† 1544:? 1529:? 1510:† 1375:? 1329:? 1307:? 1285:? 1253:? 1210:? 1183:† 1173:? 1166:† 1156:† 1152:? 1145:† 1141:? 1134:† 1130:? 1123:† 927:e 920:t 913:v 870:. 848:: 834:" 817:. 797:: 789:: 766:. 754:: 730:. 700:. 678:: 664:" 628:. 622:: 614:: 326:( 246:† 233:† 99:N 89:K 84:J 79:T 74:P 69:C 64:D 59:S 54:O 49:Ꞓ

Index

Early Cretaceous
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Paleozoological Museum of China
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Dinosauria
Saurischia
Theropoda
Avialae
Songlingornithidae
Yixianornis
Binomial name
Yixian Formation
bird

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