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Chasmosaurinae

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Chasmosaurines evolved in western North America (Laramidia). They are currently known definitively from rocks in western Canada, the western United States, and northern Mexico. They were highly diverse and among the most species-rich groups of dinosaurs, with new species frequently described. This
1320:" lineage with a pinched shut indentation in the heart-shaped frill margin. According to the cladogram below, the Triceratopsini may have derived from this later lineage. To improve resolution, certain species based on partial or immature remains ( 1760:". Triceratopsins were the largest of the chasmosaurines; suggesting that gigantism had evolved in the Ceratopsidae once. In addition there is an evolutionary trend in the solidification of the frills, the most extreme being in 1311:
The findings of a phylogenetic study done by Fowler and Freedman in 2020 are given below. The authors proposed that two distinct and roughly contemporaneous lineages of chasmosaurines existed in the late Cretaceous: a northern
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high diversity of named species is likely a result of the frill. The distinctive shape of the frill with the hornlets on its edges (epoccipitals) make it possible to recognize species from incomplete or fragmentary remains.
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being misclassified, and possibly referable to other species pending further study. The authors also noted that some newer species included in the previous analysis by Mallon et al. (
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gen. et sp. nov., a Boldly Audacious New Chasmosaurine Ceratopsid (Dinosauria: Ornithischia) from the Judith River Formation (Upper Cretaceous: Campanian) of Montana, USA"
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lineage," was not recovered by this revised analysis as they had predicted based on frill shape, the authors speculated that this may be due to some specimens included as
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were removed because it was found that they decrease resolution in the analysis because of the authors' new interpretation of epiparietal configurations.
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generally had short brow horns and relatively shorter frills, and often had long spines projecting from their frills.
1874:"Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico" 1756: 1648: 1517: 1444: 1083: 1059: 832: 763: 2068: 1970: 1576: 3342: 2186: 1427: 780: 3262: 1733: 1141: 915: 3309: 3245: 2095: 1750: 1624: 1377: 1158: 1042: 956: 671: 3217: 3337: 1826: 1744: 1600: 1316:" lineage with a heart-shaped frill margin that flattens and curls over onto itself, and a southern " 1233: 806: 676: 299: 273: 3300: 2351: 1963: 1500: 1328:) were excluded, as in the Mallon et al. study above. While this new study did not yield a single " 1216: 1124: 858: 674:
by Mallon et al., following the traditional epiparietal homology scheme from their description of
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Jordan C. Mallon; Christopher J. Ott; Peter L. Larson; Edward M. Iuliano; David C. Evans (2016).
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of their time. Chasmosaurines appeared in the early
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They were one of the most successful groups of 646:, and became extinct, along with all other non- 1971: 1742:, which he defined as "all species closer to 8: 3257: 3108: 2967: 2757: 2698: 2687: 2674: 2576: 2525: 2397: 2267: 2263: 2171: 2167: 2156: 2143: 2085: 2058: 2049: 1994: 1978: 1964: 1956: 118: 31: 1899: 1889: 1848: 1838: 1801: 1872:Fowler DW, Freedman Fowler EA (2020). 652:Cretaceous–Paleogene extinction event 134:Royal Tyrrell Museum of Palaeontology 7: 1951:http://paleodb.org/cgi-bin/bridge.pl 698:was not resolved as a member of the 1640: 1616: 1592: 1568: 1492: 1485: 1478: 1419: 1369: 1362: 1355: 1347: 1208: 1116: 1109: 1099: 1075: 1034: 931: 907: 883: 755: 748: 741: 734: 727: 720: 713: 705: 25: 3241: 3240: 3216: 3210: 2660: 2654: 1790:Timeline of ceratopsian research 1774: 144: 1736:in 2011 for the description of 27:Extinct subfamily of dinosaurs 1: 1933:10.1016/j.cretres.2010.12.007 1840:10.1371/journal.pone.0154218 1732:Triceratopsini was named by 1544:Coahuilaceratops magnacuerna 1010:Coahuilaceratops magnacuerna 608:Marsh, 1888 sensu Abel, 1919 892:Agujaceratops mariscalensis 3359: 3230: 3208: 2970: 2760: 2701: 2686: 2673: 2651: 2579: 2400: 2270: 2266: 2174: 2170: 2155: 2142: 2088: 2061: 2048: 1993: 1757:Arrhinoceratops brachyops 1662: 1649:Arrhinoceratops brachyops 1645: 1638: 1621: 1614: 1597: 1590: 1573: 1566: 1540: 1518:Pentaceratops sternbergii 1514: 1497: 1490: 1483: 1476: 1445:Kosmoceratops richardsoni 1441: 1424: 1417: 1391: 1374: 1367: 1360: 1353: 1334:Pentaceratops sternbergii 1230: 1213: 1206: 1189: 1172: 1155: 1138: 1121: 1114: 1107: 1097: 1084:Arrhinoceratops brachyops 1080: 1073: 1060:Regaliceratops peterhewsi 1056: 1039: 1032: 1006: 953: 936: 929: 912: 905: 888: 881: 855: 833:Pentaceratops sternbergii 829: 803: 777: 764:Kosmoceratops richardsoni 760: 753: 746: 739: 732: 725: 718: 711: 670:Below is the result of a 599: 592: 311: 306: 287: 280: 141:Scientific classification 139: 126: 117: 34: 1915:Longrich, N.R. (2011). " 1577:Navajoceratops sullivani 2187:Micropachycephalosaurus 1428:Vagaceratops irvinensis 781:Vagaceratops irvinensis 1917:Titanoceratops ouranos 1193:"Torosaurus" utahensis 1142:Titanoceratops ouranos 916:Mojoceratops perifania 650:dinosaurs, during the 3310:Paleobiology Database 1751:Anchiceratops ornatus 1625:Anchiceratops ornatus 1378:Chasmosaurus russelli 1159:Nedoceratops hatcheri 1043:Anchiceratops ornatus 957:Chasmosaurus russelli 672:phylogenetic analysis 1813:Spiclypeus shipporum 1745:Triceratops horridus 1734:Nicholas R. Longrich 1601:Terminocavus sealeyi 1234:Triceratops horridus 807:Spiclypeus shipporum 677:Spiclypeus shipporum 2352:Archaeoceratopsidae 1921:Cretaceous Research 1831:2016PLoSO..1154218M 1501:Utahceratops gettyi 1217:Triceratops prorsus 1125:Ojoceratops fowleri 859:Utahceratops gettyi 3072:Crittendenceratops 3022:Albertaceratopsini 1891:10.7717/peerj.9251 1395:Chasmosaurus belli 940:Chasmosaurus belli 293:Chasmosaurus belli 129:Chasmosaurus belli 3325: 3324: 3263:Taxon identifiers 3254: 3253: 3226: 3225: 3206: 3205: 3202: 3201: 3198: 3197: 3194: 3193: 3155:Pachyrhinosaurini 3093:Yehuecauhceratops 3056:Nasutoceratopsini 2957: 2956: 2669: 2668: 2649: 2648: 2645: 2644: 2641: 2640: 2637: 2636: 2633: 2632: 2629: 2628: 2530:Protoceratopsidae 2417:Leptoceratopsidae 2385: 2384: 2251: 2250: 2138: 2137: 2134: 2133: 2130: 2129: 2126: 2125: 1729: 1728: 1720: 1719: 1711: 1710: 1702: 1701: 1693: 1692: 1684: 1683: 1675: 1674: 1555: 1554: 1529: 1528: 1465: 1464: 1456: 1455: 1406: 1405: 1308: 1307: 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416: 406: 396: 386: 379:Coahuilaceratops 376: 366: 356: 346: 336: 326: 316: 290: 268: 263: 250: 237: 221: 205: 149: 148: 122: 112: 49: 38:Temporal range: 32: 21: 3358: 3357: 3353: 3352: 3351: 3349: 3348: 3347: 3328: 3327: 3326: 3321: 3313: 3308: 3299: 3298: 3293: 3284: 3283: 3278: 3265: 3255: 3250: 3222: 3215: 3190: 3149: 3098: 3079:Furcatoceratops 3050: 3031:Albertaceratops 3016: 2990:Menefeeceratops 2953: 2926:Tatankaceratops 2883: 2829:Mercuriceratops 2780:Arrhinoceratops 2747: 2695: 2682: 2665: 2653: 2625: 2605: 2566: 2515: 2482:Montanoceratops 2411: 2406:Graciliceratops 2394: 2381: 2361:Archaeoceratops 2346: 2260: 2247: 2235:Xuanhuaceratops 2221:Hualianceratops 2199: 2180:Albalophosaurus 2164: 2151: 2122: 2102: 2075: 2069:Avemetatarsalia 2054:Avemetatarsalia 2044: 2038:Marginocephalia 2000: 1999: 1989: 1984: 1946: 1941: 1940: 1914: 1913: 1909: 1871: 1870: 1866: 1825:(5): e0154218. 1808: 1807: 1803: 1798: 1780: 1775: 1773: 1770: 1730: 1721: 1712: 1703: 1694: 1685: 1676: 1556: 1530: 1466: 1457: 1407: 1351:Chasmosaurinae 1309: 1300: 1291: 1282: 1273: 1264: 1255: 1246: 1022: 996: 987: 978: 969: 871: 845: 819: 793: 709:Chasmosaurinae 668: 613: 612:Eoceratopsinae 606: 522:Tatankaceratops 409:Mercuriceratops 339:Arrhinoceratops 302: 296: 267: 261: 248: 235: 219: 203: 143: 113: 111: 110: 105: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 44: 43: 40:Late Cretaceous 36: 28: 23: 22: 15: 12: 11: 5: 3356: 3354: 3346: 3345: 3343:Chasmosaurines 3340: 3330: 3329: 3323: 3322: 3320: 3319: 3306: 3301:Chasmosaurinae 3291: 3275: 3273: 3271:Chasmosaurinae 3267: 3266: 3261: 3252: 3251: 3249: 3248: 3238: 3231: 3228: 3227: 3224: 3223: 3209: 3207: 3204: 3203: 3200: 3199: 3196: 3195: 3192: 3191: 3189: 3188: 3181: 3174: 3167: 3159: 3157: 3151: 3150: 3148: 3147: 3139: 3132: 3125: 3117: 3115: 3106: 3100: 3099: 3097: 3096: 3089: 3086:Nasutoceratops 3082: 3075: 3068: 3060: 3058: 3052: 3051: 3049: 3048: 3045:Medusaceratops 3041: 3034: 3026: 3024: 3018: 3017: 3015: 3014: 3007: 3000: 2993: 2986: 2979: 2976:Diabloceratops 2971: 2965: 2963:Centrosaurinae 2959: 2958: 2955: 2954: 2952: 2951: 2944: 2937: 2934:Titanoceratops 2930: 2922: 2919:Regaliceratops 2915: 2908: 2901: 2893: 2891: 2889:Triceratopsini 2885: 2884: 2882: 2881: 2874: 2867: 2860: 2853: 2850:Sierraceratops 2846: 2839: 2836:Navajoceratops 2832: 2825: 2818: 2811: 2804: 2797: 2790: 2783: 2776: 2769: 2761: 2755: 2753:Chasmosaurinae 2749: 2748: 2746: 2745: 2738: 2731: 2724: 2717: 2714:Brachyceratops 2710: 2702: 2696: 2691: 2684: 2683: 2678: 2671: 2670: 2667: 2666: 2652: 2650: 2647: 2646: 2643: 2642: 2639: 2638: 2635: 2634: 2631: 2630: 2627: 2626: 2624: 2623: 2622: 2621: 2615: 2613: 2607: 2606: 2604: 2603: 2596: 2593:Turanoceratops 2589: 2580: 2574: 2568: 2567: 2565: 2564: 2557: 2550: 2543: 2534: 2532: 2523: 2517: 2516: 2514: 2513: 2506: 2503:Unescoceratops 2499: 2492: 2485: 2478: 2471: 2468:Ischioceratops 2464: 2461:Gryphoceratops 2457: 2450: 2443: 2436: 2429: 2421: 2419: 2413: 2412: 2410: 2409: 2401: 2395: 2390: 2387: 2386: 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499:Triceratopsini 493: 483: 473: 469:Titanoceratops 462: 452: 442: 439:Sierraceratops 432: 422: 419:Navajoceratops 412: 402: 392: 382: 372: 362: 352: 342: 332: 322: 309: 308: 304: 303: 297: 285: 284: 278: 277: 265:Chasmosaurinae 259: 255: 254: 246: 242: 241: 233: 226: 225: 223:Neornithischia 217: 210: 209: 201: 194: 193: 188: 181: 180: 175: 171: 170: 165: 161: 160: 155: 151: 150: 137: 136: 124: 123: 115: 114: 106: 101: 96: 91: 86: 81: 76: 71: 66: 61: 56: 51: 50: 37: 35:Chasmosaurines 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 3355: 3344: 3341: 3339: 3336: 3335: 3333: 3316: 3311: 3307: 3302: 3296: 3292: 3287: 3281: 3277: 3276: 3274: 3272: 3268: 3264: 3259: 3247: 3239: 3237: 3233: 3232: 3229: 3219: 3213: 3187: 3186: 3182: 3180: 3179: 3175: 3173: 3172: 3168: 3166: 3165: 3164:Achelousaurus 3161: 3160: 3158: 3156: 3152: 3145: 3144: 3143:Styracosaurus 3140: 3138: 3137: 3133: 3131: 3130: 3126: 3124: 3123: 3119: 3118: 3116: 3114: 3113:Centrosaurini 3110: 3107: 3105: 3104:Eucentrosaura 3101: 3095: 3094: 3090: 3088: 3087: 3083: 3081: 3080: 3076: 3074: 3073: 3069: 3067: 3066: 3062: 3061: 3059: 3057: 3053: 3047: 3046: 3042: 3040: 3039: 3035: 3033: 3032: 3028: 3027: 3025: 3023: 3019: 3013: 3012: 3008: 3006: 3005: 3004:Wendiceratops 3001: 2999: 2998: 2994: 2992: 2991: 2987: 2985: 2984: 2980: 2978: 2977: 2973: 2972: 2969: 2966: 2964: 2960: 2950: 2949: 2945: 2943: 2942: 2938: 2936: 2935: 2931: 2928: 2927: 2923: 2921: 2920: 2916: 2914: 2913: 2909: 2907: 2906: 2902: 2900: 2899: 2898:Eotriceratops 2895: 2894: 2892: 2890: 2886: 2880: 2879: 2875: 2873: 2872: 2868: 2866: 2865: 2861: 2859: 2858: 2854: 2852: 2851: 2847: 2845: 2844: 2843:Pentaceratops 2840: 2838: 2837: 2833: 2831: 2830: 2826: 2824: 2823: 2822:Kosmoceratops 2819: 2817: 2816: 2812: 2810: 2809: 2805: 2803: 2802: 2798: 2796: 2795: 2794:Bravoceratops 2791: 2789: 2788: 2787:Bisticeratops 2784: 2782: 2781: 2777: 2775: 2774: 2773:Anchiceratops 2770: 2768: 2767: 2766:Agujaceratops 2763: 2762: 2759: 2756: 2754: 2750: 2744: 2743: 2739: 2737: 2736: 2732: 2730: 2729: 2725: 2723: 2722: 2718: 2716: 2715: 2711: 2709: 2708: 2704: 2703: 2700: 2697: 2694: 2689: 2685: 2681: 2676: 2672: 2663: 2657: 2619: 2618: 2617: 2616: 2614: 2612: 2608: 2602: 2601: 2597: 2595: 2594: 2590: 2587: 2586: 2582: 2581: 2578: 2575: 2573: 2572:Ceratopsoidea 2569: 2563: 2562: 2561:Protoceratops 2558: 2556: 2555: 2554:Breviceratops 2551: 2549: 2548: 2544: 2541: 2540: 2536: 2535: 2533: 2531: 2527: 2524: 2522: 2518: 2512: 2511: 2507: 2505: 2504: 2500: 2498: 2497: 2496:Udanoceratops 2493: 2491: 2490: 2489:Prenoceratops 2486: 2484: 2483: 2479: 2477: 2476: 2475:Leptoceratops 2472: 2470: 2469: 2465: 2463: 2462: 2458: 2456: 2455: 2451: 2449: 2448: 2444: 2442: 2441: 2437: 2435: 2434: 2433:Bainoceratops 2430: 2428: 2427: 2423: 2422: 2420: 2418: 2414: 2408: 2407: 2403: 2402: 2399: 2396: 2393: 2388: 2377: 2376: 2372: 2370: 2369: 2368:Helioceratops 2365: 2363: 2362: 2358: 2357: 2355: 2353: 2349: 2343: 2342: 2338: 2336: 2335: 2334:Mosaiceratops 2331: 2329: 2328: 2324: 2322: 2321: 2317: 2314: 2313: 2309: 2307: 2306: 2305:Koreaceratops 2302: 2300: 2299: 2295: 2293: 2292: 2288: 2286: 2285: 2281: 2278: 2277: 2273: 2272: 2269: 2265: 2262: 2259: 2258:Neoceratopsia 2254: 2244: 2243: 2239: 2237: 2236: 2232: 2230: 2229: 2225: 2223: 2222: 2218: 2216: 2215: 2211: 2210: 2208: 2206: 2202: 2196: 2195: 2191: 2189: 2188: 2184: 2182: 2181: 2177: 2176: 2173: 2169: 2166: 2163: 2158: 2154: 2150: 2145: 2141: 2116: 2115: 2114: 2113: 2111: 2109: 2105: 2097: 2093: 2092: 2091: 2090: 2087: 2084: 2082: 2078: 2070: 2066: 2065: 2064: 2063: 2060: 2057: 2055: 2051: 2047: 2039: 2035: 2032: 2030: 2026: 2023: 2021: 2017: 2014: 2012: 2008: 2006: 2002: 2001: 1996: 1992: 1988: 1981: 1976: 1974: 1969: 1967: 1962: 1961: 1958: 1952: 1948: 1947: 1943: 1934: 1930: 1926: 1922: 1918: 1911: 1908: 1902: 1897: 1892: 1887: 1883: 1879: 1875: 1868: 1865: 1860: 1856: 1851: 1846: 1841: 1836: 1832: 1828: 1824: 1820: 1816: 1814: 1805: 1802: 1795: 1791: 1788: 1787: 1783: 1772: 1767: 1765: 1763: 1759: 1758: 1753: 1752: 1747: 1746: 1741: 1740: 1735: 1725: 1724: 1716: 1715: 1707: 1706: 1698: 1697: 1689: 1688: 1680: 1679: 1671: 1670: 1667: 1666: 1660: 1659: 1656: 1655: 1652: 1651: 1650: 1643: 1642: 1636: 1635: 1632: 1631: 1628: 1627: 1626: 1619: 1618: 1612: 1611: 1608: 1607: 1604: 1603: 1602: 1595: 1594: 1588: 1587: 1584: 1583: 1580: 1579: 1578: 1571: 1570: 1564: 1563: 1560: 1559: 1551: 1550: 1547: 1546: 1545: 1538: 1537: 1534: 1533: 1525: 1524: 1521: 1520: 1519: 1512: 1511: 1508: 1507: 1504: 1503: 1502: 1495: 1494: 1488: 1487: 1481: 1480: 1474: 1473: 1470: 1469: 1461: 1460: 1452: 1451: 1448: 1447: 1446: 1439: 1438: 1435: 1434: 1431: 1430: 1429: 1422: 1421: 1415: 1414: 1411: 1410: 1402: 1401: 1398: 1397: 1396: 1389: 1388: 1385: 1384: 1381: 1380: 1379: 1372: 1371: 1365: 1364: 1358: 1357: 1350: 1349: 1345: 1343: 1339: 1335: 1331: 1330:Pentaceratops 1327: 1326:Agujaceratops 1323: 1322:Bravoceratops 1319: 1318:Pentaceratops 1315: 1304: 1303: 1295: 1294: 1286: 1285: 1277: 1276: 1268: 1267: 1259: 1258: 1250: 1249: 1241: 1240: 1237: 1236: 1235: 1228: 1227: 1224: 1223: 1220: 1219: 1218: 1211: 1210: 1204: 1203: 1200: 1199: 1196: 1195: 1194: 1187: 1186: 1183: 1182: 1179: 1178: 1177: 1170: 1169: 1166: 1165: 1162: 1161: 1160: 1153: 1152: 1149: 1148: 1145: 1144: 1143: 1136: 1135: 1132: 1131: 1128: 1127: 1126: 1119: 1118: 1112: 1111: 1105: 1102: 1101: 1095: 1094: 1091: 1090: 1087: 1086: 1085: 1078: 1077: 1071: 1070: 1067: 1066: 1063: 1062: 1061: 1054: 1053: 1050: 1049: 1046: 1045: 1044: 1037: 1036: 1030: 1029: 1026: 1025: 1017: 1016: 1013: 1012: 1011: 1004: 1003: 1000: 999: 991: 990: 982: 981: 973: 972: 964: 963: 960: 959: 958: 951: 950: 947: 946: 943: 942: 941: 934: 933: 927: 926: 923: 922: 919: 918: 917: 910: 909: 903: 902: 899: 898: 895: 894: 893: 886: 885: 879: 878: 875: 874: 866: 865: 862: 861: 860: 853: 852: 849: 848: 840: 839: 836: 835: 834: 827: 826: 823: 822: 814: 813: 810: 809: 808: 801: 800: 797: 796: 788: 787: 784: 783: 782: 775: 774: 771: 770: 767: 766: 765: 758: 757: 751: 750: 744: 743: 737: 736: 730: 729: 723: 722: 716: 715: 708: 707: 703: 701: 697: 696: 691: 690: 689:Eotriceratops 685: 684: 683:Bravoceratops 679: 678: 673: 665: 663: 659: 657: 653: 649: 645: 641: 637: 634: 630: 626: 611: 604: 601: 600: 598: 595: 591: 584: 583: 576: 574: 573: 566: 564: 563: 556: 554: 553: 546: 544: 543: 542:Eotriceratops 536: 534: 533: 526: 524: 523: 516: 513: 512: 505: 504: 500: 494: 492: 491: 484: 482: 481: 474: 471: 470: 463: 461: 460: 453: 451: 450: 443: 441: 440: 433: 431: 430: 429:Pentaceratops 423: 421: 420: 413: 411: 410: 403: 401: 400: 399:Kosmoceratops 393: 391: 390: 383: 381: 380: 373: 371: 370: 363: 361: 360: 359:Bravoceratops 353: 351: 350: 349:Bisticeratops 343: 341: 340: 333: 331: 330: 329:Anchiceratops 323: 321: 320: 319:Agujaceratops 313: 312: 310: 305: 301: 295: 294: 286: 283: 279: 275: 271: 266: 260: 257: 256: 253: 247: 244: 243: 240: 234: 231: 228: 227: 224: 218: 215: 212: 211: 208: 202: 199: 196: 195: 192: 189: 186: 183: 182: 179: 176: 173: 172: 169: 166: 163: 162: 159: 156: 153: 152: 147: 142: 138: 135: 131: 130: 125: 121: 116: 109: 104: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 48: 41: 33: 30: 19: 18:Triceratopsin 3270: 3183: 3178:Stellasaurus 3176: 3169: 3162: 3141: 3134: 3129:Coronosaurus 3127: 3122:Centrosaurus 3120: 3091: 3084: 3077: 3070: 3063: 3043: 3038:Lokiceratops 3036: 3029: 3011:Xenoceratops 3009: 3002: 2997:Sinoceratops 2995: 2988: 2981: 2974: 2946: 2939: 2932: 2924: 2917: 2910: 2905:Nedoceratops 2903: 2896: 2878:Vagaceratops 2876: 2871:Utahceratops 2869: 2864:Terminocavus 2862: 2855: 2848: 2841: 2834: 2827: 2820: 2815:Judiceratops 2813: 2806: 2801:Chasmosaurus 2799: 2792: 2785: 2778: 2771: 2764: 2752: 2740: 2733: 2726: 2719: 2712: 2705: 2693:Ceratopsidae 2680:Ceratopsidae 2611:Ceratopsidae 2600:Zuniceratops 2598: 2591: 2585:Ajkaceratops 2583: 2559: 2552: 2547:Bagaceratops 2545: 2539:Ajkaceratops 2537: 2521:Coronosauria 2508: 2501: 2494: 2487: 2480: 2473: 2466: 2459: 2452: 2445: 2438: 2431: 2426:Asiaceratops 2424: 2404: 2392:Euceratopsia 2375:Yamaceratops 2373: 2366: 2359: 2339: 2332: 2327:Microceratus 2325: 2320:Liaoceratops 2318: 2310: 2303: 2296: 2289: 2282: 2276:Ajkaceratops 2274: 2240: 2233: 2226: 2219: 2212: 2192: 2185: 2178: 2096:Ornithischia 2081:Ornithischia 2033: 2029:Ornithischia 2024: 2015: 1924: 1920: 1916: 1910: 1881: 1877: 1867: 1822: 1818: 1812: 1804: 1761: 1755: 1749: 1743: 1737: 1731: 1663: 1647: 1646: 1623: 1622: 1599: 1598: 1575: 1574: 1542: 1541: 1516: 1515: 1499: 1498: 1443: 1442: 1426: 1425: 1393: 1392: 1376: 1375: 1341: 1337: 1333: 1329: 1325: 1321: 1317: 1314:Chasmosaurus 1313: 1310: 1232: 1231: 1215: 1214: 1191: 1190: 1174: 1173: 1157: 1156: 1140: 1139: 1123: 1122: 1082: 1081: 1058: 1057: 1041: 1040: 1008: 1007: 955: 954: 938: 937: 914: 913: 890: 889: 857: 856: 831: 830: 805: 804: 779: 778: 762: 761: 693: 687: 681: 675: 669: 660: 624: 623: 603:Ceratopsinae 580: 570: 560: 550: 540: 532:Nedoceratops 530: 520: 509: 498: 490:Vagaceratops 488: 480:Utahceratops 478: 467: 459:Terminocavus 457: 447: 437: 427: 417: 407: 397: 389:Judiceratops 387: 377: 369:Chasmosaurus 367: 357: 347: 337: 327: 317: 291: 282:Type species 264: 252:Ceratopsidae 229: 213: 207:Ornithischia 197: 184: 127: 29: 3338:Ceratopsids 3295:Wikispecies 3171:Einiosaurus 3065:Avaceratops 2948:Triceratops 2912:Ojoceratops 2735:Monoclonius 2447:Ferrisaurus 2312:Kulceratops 1762:Triceratops 615:Lambe, 1915 582:Triceratops 552:Ojoceratops 502:Marsh, 1889 258:Subfamily: 45:78–66  3332:Categories 3234:See also: 2941:Torosaurus 2857:Spiclypeus 2707:Agathaumas 2620:see below↓ 2440:Cerasinops 2228:Stenopelix 2162:Ceratopsia 2149:Ceratopsia 2117:see below↓ 2108:Ceratopsia 2020:Dinosauria 1987:Ceratopsia 1796:References 1338:Spiclypeus 640:herbivores 633:ceratopsid 572:Torosaurus 449:Spiclypeus 307:Subgroups 239:Ceratopsia 191:Dinosauria 132:skeleton, 2003:Kingdom: 1884:. e9251. 644:Campanian 636:dinosaurs 629:subfamily 164:Kingdom: 158:Eukaryota 3280:Wikidata 3246:Category 3236:Timeline 2742:Polyonax 2728:Dysganus 2721:Ceratops 2284:Aquilops 2011:Chordata 2009:Phylum: 2005:Animalia 1859:27191389 1819:PLOS ONE 1768:See also 1748:than to 594:Synonyms 245:Family: 178:Chordata 174:Phylum: 168:Animalia 154:Domain: 3286:Q137441 3136:Spinops 2454:Gremlin 2242:Yinlong 1901:7278894 1850:4871577 1827:Bibcode 298:Lambe, 1898:  1857:  1847:  3315:52773 2034:Clade 2025:Clade 2016:Clade 1878:PeerJ 648:avian 627:is a 270:Lambe 230:Clade 214:Clade 198:Clade 185:Clade 2094:see 2067:see 1855:PMID 1324:and 686:and 300:1902 274:1915 53:PreꞒ 2298:Beg 1929:doi 1896:PMC 1886:doi 1845:PMC 1835:doi 1754:or 631:of 3334:: 3312:: 3297:: 3282:: 2036:: 2027:: 2018:: 1949:1. 1925:32 1923:. 1894:. 1880:. 1876:. 1853:. 1843:. 1833:. 1823:11 1821:. 1817:. 1764:. 1340:, 702:. 680:. 605:? 272:, 232:: 216:: 200:: 187:: 103:Pg 47:Ma 42:, 3146:? 2929:? 2588:? 2542:? 2378:? 2315:? 2279:? 1979:e 1972:t 1965:v 1935:. 1931:: 1904:. 1888:: 1882:8 1861:. 1837:: 1829:: 1811:" 1312:" 578:† 568:† 558:† 548:† 538:† 528:† 518:† 514:? 507:† 496:† 486:† 476:† 472:? 465:† 455:† 445:† 435:† 425:† 415:† 405:† 395:† 385:† 375:† 365:† 355:† 345:† 335:† 325:† 315:† 289:† 262:† 249:† 236:† 220:† 204:† 108:N 98:K 93:J 88:T 83:P 78:C 73:D 68:S 63:O 58:Ꞓ 20:)

Index

Triceratopsin
Late Cretaceous
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Chasmosaurus belli
Royal Tyrrell Museum of Palaeontology
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Dinosauria
Ornithischia
Neornithischia
Ceratopsia
Ceratopsidae
Chasmosaurinae
Lambe

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