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Ajkaceratops

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differs markedly from the rostral morphology of other ceratopsians, possessing a sub-circular cross section, pitted texture instead of grooves, and a lack of lateral slicing edges. Furthermore, the proposed rostral bone appears to have fully fused with the premaxilla, a feature that is only seen in
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estimated a body length of 1 m (3.3 ft). Other material includes four predentary bones, cataloged as MTM V2009.193.1, V2009.194.1, V2009.195.1, and V2009.196.1; these are also believed to have belonged to
379:, cataloged as MTM V2009.192.1, consists only of a few skull fragments, including snout with proposed rostral bone, fused premaxillae, and maxillae fragments (beak and jaw fragments). These fossils are kept in the 500:
possesses a rostral bone in the first place, a defining feature of the ceratopsian group, and instead the hooked beak represents a highly derived, hypertrophied premaxilla. While there is the possibility
521:, which is interpreted as a floodplain and channel deposit formed by variegated clay, silt with interbedded grey and brown sand, and sandstone beds. This strata dates to the 2129: 673:
Czepiński, Łukasz; Madzia, Daniel (2024). "Osteology, phylogenetic affinities, and palaeobiogeographic significance of the bizarre ornithischian dinosaur
2144: 2139: 1452: 774: 622:Ősi, Attila; Butler, R.J.; Weishampel, David B. (2010-05-27). "A Late Cretaceous ceratopsian dinosaur from Europe with Asian affinities". 1458: 2032: 578: 380: 2149: 2008: 142: 2134: 505:
is a highly unique ceratopsian, it is currently referred to as an enigmatic ornithischian of uncertain affinities.
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When first described, the fossils were stated to most closely resemble those of the Asian
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However, more recent research has questioned this referral. The proposed rostral bone of
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where the fossils were first discovered, combined with the given greek nomination
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Scale bar 10 cm. Reconstruction based on initial ceratopsian identity
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related to the protoceratopsids, but more primitive than the
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Although the fossils are fragmentary, the paper describing
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shared its environment with other dinosaurs such as
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Weishampel 2038: 2037: 2013: 2007: 1457: 1451: 579:Timeline of ceratopsian research 381:Hungarian Natural History Museum 351:, was originally described as a 141: 466:. Those similarities indicate 1: 2140:Fossil taxa described in 2010 129:proposed rostral fused with 2166: 687:10.1093/zoolinnean/zlae048 16:Extinct genus of dinosaurs 2027: 2005: 1767: 1557: 1498: 1483: 1470: 1448: 1376: 1197: 1067: 1063: 971: 967: 952: 939: 885: 858: 845: 790: 289: 282: 138:Scientific classification 136: 125: 116: 23: 984:Micropachycephalosaurus 517:were discovered in the 409:, honors KĂĄroly Kozma. 454: 429: 2092:Paleobiology Database 452: 420: 2150:Ornithischian genera 589:2010 in paleontology 387:. The generic name, 2068:Ajkaceratops kozmai 1149:Archaeoceratopsidae 721:10.1038/nature09019 675:Ajkaceratops kozmai 644:10.1038/nature09019 636:2010Natur.465..466O 519:CsehbĂĄnya Formation 337:Tethyan archipelago 296:Ajkaceratops kozmai 2135:Fossils of Hungary 1869:Crittendenceratops 1819:Albertaceratopsini 679:Zoological Journal 550:birds, as well as 542:, other non-avian 455: 430: 2107: 2106: 2060:Taxon identifiers 2051: 2050: 2023: 2022: 2003: 2002: 1999: 1998: 1995: 1994: 1991: 1990: 1952:Pachyrhinosaurini 1890:Yehuecauhceratops 1853:Nasutoceratopsini 1754: 1753: 1466: 1465: 1446: 1445: 1442: 1441: 1438: 1437: 1434: 1433: 1430: 1429: 1426: 1425: 1327:Protoceratopsidae 1214:Leptoceratopsidae 1182: 1181: 1048: 1047: 935: 934: 931: 930: 927: 926: 923: 922: 715:(7297): 466–468. 630:(7297): 466–468. 584:List of dinosaurs 509:Palaeoenvironment 424:based on initial 339:, in what is now 313: 312: 263: 2157: 2100: 2099: 2087: 2086: 2085: 2055: 2041: 2040: 2018: 2017: 2011: 1982:Pachyrhinosaurus 1906: 1780:Machairoceratops 1765: 1605:Coahuilaceratops 1555: 1496: 1485: 1472: 1461: 1456: 1455: 1374: 1323: 1307:Zhuchengceratops 1195: 1065: 1061: 1002:Chaoyangsauridae 969: 965: 954: 941: 883: 856: 847: 840: 839: 792: 777: 770: 763: 754: 747: 746: 744: 743: 706: 697: 691: 690: 670: 664: 663: 619: 422:Life restoration 298: 294: 254: 247: 234: 218: 202: 146: 145: 121: 111: 41: 29:Temporal range: 21: 2165: 2164: 2160: 2159: 2158: 2156: 2155: 2154: 2110: 2109: 2108: 2103: 2095: 2090: 2081: 2080: 2075: 2062: 2052: 2047: 2019: 2012: 1987: 1946: 1895: 1876:Furcatoceratops 1847: 1828:Albertaceratops 1813: 1787:Menefeeceratops 1750: 1723:Tatankaceratops 1680: 1626:Mercuriceratops 1577:Arrhinoceratops 1544: 1492: 1479: 1462: 1450: 1422: 1402: 1363: 1312: 1279:Montanoceratops 1208: 1203:Graciliceratops 1191: 1178: 1158:Archaeoceratops 1143: 1057: 1044: 1032:Xuanhuaceratops 1018:Hualianceratops 996: 977:Albalophosaurus 961: 948: 919: 899: 872: 866:Avemetatarsalia 851:Avemetatarsalia 841: 835:Marginocephalia 797: 796: 786: 781: 751: 750: 741: 739: 704: 699: 698: 694: 672: 671: 667: 621: 620: 607: 602: 575: 548:enantiornithine 513:The fossils of 511: 459:protoceratopsid 447: 415: 373: 335:in the western 333:Late Cretaceous 309: 300: 292: 291: 278: 253: 245: 232: 216: 200: 140: 112: 110: 109: 108: 107: 102: 97: 92: 87: 82: 77: 72: 67: 62: 57: 52: 47: 36: 35: 33: 27: 17: 12: 11: 5: 2163: 2161: 2153: 2152: 2147: 2142: 2137: 2132: 2127: 2125:Santonian life 2122: 2112: 2111: 2105: 2104: 2102: 2101: 2088: 2072: 2070: 2064: 2063: 2058: 2049: 2048: 2046: 2045: 2035: 2028: 2025: 2024: 2021: 2020: 2006: 2004: 2001: 2000: 1997: 1996: 1993: 1992: 1989: 1988: 1986: 1985: 1978: 1971: 1964: 1956: 1954: 1948: 1947: 1945: 1944: 1936: 1929: 1922: 1914: 1912: 1903: 1897: 1896: 1894: 1893: 1886: 1883:Nasutoceratops 1879: 1872: 1865: 1857: 1855: 1849: 1848: 1846: 1845: 1842:Medusaceratops 1838: 1831: 1823: 1821: 1815: 1814: 1812: 1811: 1804: 1797: 1790: 1783: 1776: 1773:Diabloceratops 1768: 1762: 1760:Centrosaurinae 1756: 1755: 1752: 1751: 1749: 1748: 1741: 1734: 1731:Titanoceratops 1727: 1719: 1716:Regaliceratops 1712: 1705: 1698: 1690: 1688: 1686:Triceratopsini 1682: 1681: 1679: 1678: 1671: 1664: 1657: 1650: 1647:Sierraceratops 1643: 1636: 1633:Navajoceratops 1629: 1622: 1615: 1608: 1601: 1594: 1587: 1580: 1573: 1566: 1558: 1552: 1550:Chasmosaurinae 1546: 1545: 1543: 1542: 1535: 1528: 1521: 1514: 1511:Brachyceratops 1507: 1499: 1493: 1488: 1481: 1480: 1475: 1468: 1467: 1464: 1463: 1449: 1447: 1444: 1443: 1440: 1439: 1436: 1435: 1432: 1431: 1428: 1427: 1424: 1423: 1421: 1420: 1419: 1418: 1412: 1410: 1404: 1403: 1401: 1400: 1393: 1390:Turanoceratops 1386: 1377: 1371: 1365: 1364: 1362: 1361: 1354: 1347: 1340: 1331: 1329: 1320: 1314: 1313: 1311: 1310: 1303: 1300:Unescoceratops 1296: 1289: 1282: 1275: 1268: 1265:Ischioceratops 1261: 1258:Gryphoceratops 1254: 1247: 1240: 1233: 1226: 1218: 1216: 1210: 1209: 1207: 1206: 1198: 1192: 1187: 1184: 1183: 1180: 1179: 1177: 1176: 1168: 1161: 1153: 1151: 1145: 1144: 1142: 1141: 1138:Sasayamagnomus 1134: 1127: 1120: 1113: 1105: 1098: 1091: 1088:Auroraceratops 1084: 1077: 1068: 1058: 1053: 1050: 1049: 1046: 1045: 1043: 1042: 1035: 1028: 1021: 1014: 1011:Chaoyangsaurus 1006: 1004: 998: 997: 995: 994: 991:Psittacosaurus 987: 980: 972: 962: 957: 950: 949: 944: 937: 936: 933: 932: 929: 928: 925: 924: 921: 920: 918: 917: 916: 915: 909: 907: 901: 900: 898: 897: 896: 895: 886: 880: 874: 873: 871: 870: 869: 868: 859: 853: 843: 842: 838: 837: 828: 819: 810: 804: 795: 788: 787: 782: 780: 779: 772: 765: 757: 749: 748: 692: 665: 604: 603: 601: 598: 597: 596: 591: 586: 581: 574: 571: 510: 507: 446: 445:Classification 443: 414: 411: 372: 369: 361:island-hopping 311: 310: 301: 287: 286: 280: 279: 275:A. kozmai 271: 269: 265: 264: 243: 239: 238: 230: 223: 222: 220:Neornithischia 214: 207: 206: 198: 191: 190: 185: 178: 177: 172: 168: 167: 162: 158: 157: 152: 148: 147: 134: 133: 123: 122: 114: 113: 105: 104: 103: 98: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 43: 42: 28: 15: 13: 10: 9: 6: 4: 3: 2: 2162: 2151: 2148: 2146: 2143: 2141: 2138: 2136: 2133: 2131: 2128: 2126: 2123: 2121: 2118: 2117: 2115: 2098: 2093: 2089: 2084: 2078: 2074: 2073: 2071: 2069: 2065: 2061: 2056: 2044: 2036: 2034: 2030: 2029: 2026: 2016: 2010: 1984: 1983: 1979: 1977: 1976: 1972: 1970: 1969: 1965: 1963: 1962: 1961:Achelousaurus 1958: 1957: 1955: 1953: 1949: 1942: 1941: 1940:Styracosaurus 1937: 1935: 1934: 1930: 1928: 1927: 1923: 1921: 1920: 1916: 1915: 1913: 1911: 1910:Centrosaurini 1907: 1904: 1902: 1901:Eucentrosaura 1898: 1892: 1891: 1887: 1885: 1884: 1880: 1878: 1877: 1873: 1871: 1870: 1866: 1864: 1863: 1859: 1858: 1856: 1854: 1850: 1844: 1843: 1839: 1837: 1836: 1832: 1830: 1829: 1825: 1824: 1822: 1820: 1816: 1810: 1809: 1805: 1803: 1802: 1801:Wendiceratops 1798: 1796: 1795: 1791: 1789: 1788: 1784: 1782: 1781: 1777: 1775: 1774: 1770: 1769: 1766: 1763: 1761: 1757: 1747: 1746: 1742: 1740: 1739: 1735: 1733: 1732: 1728: 1725: 1724: 1720: 1718: 1717: 1713: 1711: 1710: 1706: 1704: 1703: 1699: 1697: 1696: 1695:Eotriceratops 1692: 1691: 1689: 1687: 1683: 1677: 1676: 1672: 1670: 1669: 1665: 1663: 1662: 1658: 1656: 1655: 1651: 1649: 1648: 1644: 1642: 1641: 1640:Pentaceratops 1637: 1635: 1634: 1630: 1628: 1627: 1623: 1621: 1620: 1619:Kosmoceratops 1616: 1614: 1613: 1609: 1607: 1606: 1602: 1600: 1599: 1595: 1593: 1592: 1591:Bravoceratops 1588: 1586: 1585: 1584:Bisticeratops 1581: 1579: 1578: 1574: 1572: 1571: 1570:Anchiceratops 1567: 1565: 1564: 1563:Agujaceratops 1560: 1559: 1556: 1553: 1551: 1547: 1541: 1540: 1536: 1534: 1533: 1529: 1527: 1526: 1522: 1520: 1519: 1515: 1513: 1512: 1508: 1506: 1505: 1501: 1500: 1497: 1494: 1491: 1486: 1482: 1478: 1473: 1469: 1460: 1454: 1416: 1415: 1414: 1413: 1411: 1409: 1405: 1399: 1398: 1394: 1392: 1391: 1387: 1384: 1383: 1379: 1378: 1375: 1372: 1370: 1369:Ceratopsoidea 1366: 1360: 1359: 1358:Protoceratops 1355: 1353: 1352: 1351:Breviceratops 1348: 1346: 1345: 1341: 1338: 1337: 1333: 1332: 1330: 1328: 1324: 1321: 1319: 1315: 1309: 1308: 1304: 1302: 1301: 1297: 1295: 1294: 1293:Udanoceratops 1290: 1288: 1287: 1286:Prenoceratops 1283: 1281: 1280: 1276: 1274: 1273: 1272:Leptoceratops 1269: 1267: 1266: 1262: 1260: 1259: 1255: 1253: 1252: 1248: 1246: 1245: 1241: 1239: 1238: 1234: 1232: 1231: 1230:Bainoceratops 1227: 1225: 1224: 1220: 1219: 1217: 1215: 1211: 1205: 1204: 1200: 1199: 1196: 1193: 1190: 1185: 1174: 1173: 1169: 1167: 1166: 1165:Helioceratops 1162: 1160: 1159: 1155: 1154: 1152: 1150: 1146: 1140: 1139: 1135: 1133: 1132: 1131:Mosaiceratops 1128: 1126: 1125: 1121: 1119: 1118: 1114: 1111: 1110: 1106: 1104: 1103: 1102:Koreaceratops 1099: 1097: 1096: 1092: 1090: 1089: 1085: 1083: 1082: 1078: 1075: 1074: 1070: 1069: 1066: 1062: 1059: 1056: 1055:Neoceratopsia 1051: 1041: 1040: 1036: 1034: 1033: 1029: 1027: 1026: 1022: 1020: 1019: 1015: 1013: 1012: 1008: 1007: 1005: 1003: 999: 993: 992: 988: 986: 985: 981: 979: 978: 974: 973: 970: 966: 963: 960: 955: 951: 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1277: 1270: 1263: 1256: 1249: 1242: 1235: 1228: 1223:Asiaceratops 1221: 1201: 1189:Euceratopsia 1172:Yamaceratops 1170: 1163: 1156: 1136: 1129: 1124:Microceratus 1122: 1117:Liaoceratops 1115: 1107: 1100: 1093: 1086: 1079: 1073:Ajkaceratops 1072: 1071: 1037: 1030: 1023: 1016: 1009: 989: 982: 975: 893:Ornithischia 878:Ornithischia 830: 826:Ornithischia 821: 812: 740:. Retrieved 712: 708: 695: 678: 674: 668: 627: 623: 594:HaĹŁeg Island 565:turtles and 554:crocodiles, 530: 527:Ajkaceratops 526: 515:Ajkaceratops 514: 512: 503:Ajkaceratops 502: 498:Ajkaceratops 497: 489:Ajkaceratops 488: 486: 482:Ceratopsidae 477:Zuniceratops 475: 468:Ajkaceratops 467: 463:Bagaceratops 461: 456: 439:Ajkaceratops 438: 434:Ajkaceratops 433: 431: 406: 400: 395:, a town in 389:Ajkaceratops 388: 374: 365:Ajkaceratops 364: 348: 345:type species 317:Ajkaceratops 316: 315: 314: 305: 295: 290: 274: 273: 256: 250:Ajkaceratops 249: 248: 226: 210: 204:Ornithischia 194: 181: 25:Ajkaceratops 24: 18: 1968:Einiosaurus 1862:Avaceratops 1745:Triceratops 1709:Ojoceratops 1532:Monoclonius 1244:Ferrisaurus 1109:Kulceratops 563:bothremydid 540:ankylosaurs 494:ceratopsids 472:ceratopsian 426:ceratopsian 413:Description 353:ceratopsian 131:premaxillae 2114:Categories 2031:See also: 1738:Torosaurus 1654:Spiclypeus 1504:Agathaumas 1417:see below↓ 1237:Cerasinops 1025:Stenopelix 959:Ceratopsia 946:Ceratopsia 914:see below↓ 905:Ceratopsia 817:Dinosauria 784:Ceratopsia 742:2010-05-29 600:References 559:pterosaurs 556:azhdarchid 537:nodosaurid 236:Ceratopsia 188:Dinosauria 800:Kingdom: 737:205220451 660:205220451 569:lizards. 552:eusuchian 544:theropods 532:Mochlodon 523:Santonian 391:, honors 371:Discovery 349:A. kozmai 268:Species: 161:Kingdom: 155:Eukaryota 31:Santonian 2077:Wikidata 2043:Category 2033:Timeline 1539:Polyonax 1525:Dysganus 1518:Ceratops 1081:Aquilops 808:Chordata 806:Phylum: 802:Animalia 729:20505726 652:20505726 573:See also 480:and the 428:identity 402:ceratops 385:Budapest 377:holotype 329:dinosaur 175:Chordata 171:Phylum: 165:Animalia 151:Domain: 127:Holotype 37:85  2083:Q516014 1933:Spinops 1251:Gremlin 1039:Yinlong 632:Bibcode 407:kozmai" 397:Hungary 293:† 272:† 242:Genus: 106:↓ 2097:167127 735:  727:  709:Nature 658:  650:  624:Nature 535:, the 343:. The 341:Europe 308:, 2010 306:et al. 257:et al. 831:Clade 822:Clade 813:Clade 733:S2CID 705:(PDF) 656:S2CID 567:teiid 470:is a 383:, in 322:genus 227:Clade 211:Clade 195:Clade 182:Clade 891:see 864:see 725:PMID 648:PMID 546:and 393:Ajka 375:The 357:Asia 261:2010 255:Ősi 45:PreꞒ 1095:Beg 717:doi 713:465 683:doi 640:doi 628:465 324:of 303:Ősi 2116:: 2094:: 2079:: 833:: 824:: 815:: 731:. 723:. 711:. 707:. 681:. 654:. 646:. 638:. 626:. 608:^ 561:, 484:. 347:, 259:, 229:: 213:: 197:: 184:: 95:Pg 39:Ma 1943:? 1726:? 1385:? 1339:? 1175:? 1112:? 1076:? 776:e 769:t 762:v 745:. 719:: 689:. 685:: 662:. 642:: 634:: 246:† 233:† 217:† 201:† 100:N 90:K 85:J 80:T 75:P 70:C 65:D 60:S 55:O 50:Ꞓ 34:~

Index

Santonian
Ma
PreꞒ
Ꞓ
O
S
D
C
P
T
J
K
Pg
N

Holotype
premaxillae
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Dinosauria
Ornithischia
Neornithischia
Ceratopsia
Ajkaceratops
2010
Binomial name
Ősi

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