Knowledge (XXG)

Chondrosteus

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Egerton, 1858 (Acipenseriformes, †Chondrosteidae) from the lower Lias of Lyme Regis (Dorset, England), with comments on the early evolution of sturgeons and paddlefishes".
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were free from the rest of the skull (projectile jaw system). Its scale cover was reduced to the upper lobe of the
1688: 756: 109: 735: 1420: 1475: 250: 374:, and is one of the earliest known definitive members of the group. Similar to sturgeons, the jaws of 1356: 749: 616: 570: 1322: 1312: 1282: 1061: 1349: 1252: 498: 934: 1272: 1179: 1026: 966: 956: 632: 586: 285: 132: 1012: 945: 1564: 1499: 1480: 1193: 1165: 1054: 1033: 988: 977: 708: 690: 607:
Bemis, William E.; Findeis, Eric K.; Grande, Lance (1997). "An overview of Acipenseriformes".
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only in size and ossification of plates, and likely only represent ontogenic growth stages of
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in a private collection, which represents the oldest record of the genus.
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specimens outside of Lyme Regis are a poorly-preserved specimen from
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in 1834, but was not officially described until 24 years later by
327: 470:, there are no recent comparative studies on these two genera. 1635: 1329: 1418: 783: 745: 741: 407:, who used Agassiz's original name for the taxon. The species 557:
Hilton, Eric J.; Forey, Peter L. (2009). "Redescription of †
1643: 1583: 1523: 552: 550: 1345: 1335: 1318: 1308: 1278: 1268: 1258: 1241: 1231: 1221: 1153: 1116: 1101: 1090: 1000: 984: 973: 962: 952: 941: 930: 919: 305: 294: 1427: 1292: 1212: 1203: 1152: 1115: 1075: 999: 900: 853: 826: 602: 600: 437:and a Hettangian-aged post-cranial skeleton from 1663: 1603: 1543: 757: 8: 667:Hornung, Jahn J.; Sachs, Sven (2020-01-22). 1670: 1656: 1610: 1596: 1550: 1536: 1415: 1209: 1083: 912: 908: 897: 832: 823: 780: 764: 750: 742: 108: 20: 702: 684: 656:(in French). Imprimerie de Petitpierre. 520: 385:It is represented by a single species, 399:. This species was first mentioned by 7: 1621: 1619: 1561: 1559: 1496: 1494: 653:Recherches sur les poissons fossiles 563:Journal of Systematic Palaeontology 1714:Hettangian genus first appearances 1694:Prehistoric ray-finned fish genera 1642:. You can help Knowledge (XXG) by 1582:. You can help Knowledge (XXG) by 1522:. You can help Knowledge (XXG) by 14: 336:actinopterygian (ray-finned fish) 1623: 1563: 1498: 1399: 1393: 1386: 729: 505: 491: 136: 609:Environmental Biology of Fishes 1: 1734:Prehistoric Chondrostei stubs 1724:Fossil taxa described in 1858 460:was reallocated to the genus 1719:Sinemurian genus extinctions 559:Chondrosteus acipenseroides 479:Chondrosteus acipenseroides 263:Chondrosteus acipenseroides 118:Chondrosteus acipenseroides 1755: 1631:This article related to a 1618: 1558: 1493: 1383: 1086: 915: 911: 896: 877: 835: 822: 779: 583:10.1017/S1477201909002740 291: 284: 256: 249: 133:Scientific classification 131: 116: 107: 23: 446:Chondrosteus hindenburgi 338:belonging to the family 1704:Jurassic fish of Europe 1518:) related article is a 650:Agassiz, Louis (1833). 629:10.1023/A:1007370213924 535:. Paleobiology Database 16:Extinct genus of fishes 481: 342:. It lived during the 242:C. acipenseroides 1571:This article about a 1476:Paleobiology Database 476: 370:as part of the clade 1357:Pseudoscaphirhynchus 738:at Wikimedia Commons 382:like in paddlefish. 1739:Jurassic fish stubs 1350:Protoscaphirhynchus 621:1997EnvBF..48...25B 575:2009JSPal...7..427H 499:Paleontology portal 405:Philip Grey Egerton 1709:Jurassic bony fish 1699:Fossils of England 967:Bobasatraniiformes 686:10.7717/peerj.8400 482: 1729:Chondrostei stubs 1651: 1650: 1591: 1590: 1531: 1530: 1491: 1490: 1421:Taxon identifiers 1412: 1411: 1408: 1407: 1381: 1380: 1377: 1376: 1373: 1372: 1071: 1070: 989:Saurichthyiformes 978:Guildayichthyidae 892: 891: 888: 887: 873: 872: 734:Media related to 429:. The only known 427:C. acipenseroides 423:C. acipenseroides 420: 413: 388:C. acipenseroides 354:) in what is now 319: 318: 313: 302: 230: 193:Chondrosteiformes 1746: 1689:Acipenseriformes 1672: 1665: 1658: 1627: 1620: 1612: 1605: 1598: 1567: 1560: 1552: 1545: 1538: 1508:Acipenseriformes 1502: 1495: 1484: 1483: 1471: 1470: 1458: 1457: 1448: 1447: 1446: 1416: 1403: 1397: 1391: 1390: 1347: 1337: 1320: 1310: 1280: 1270: 1260: 1243: 1233: 1223: 1210: 1155: 1118: 1103: 1092: 1084: 1078:Acipenseriformes 1048:Plesiococcolepis 1002: 986: 975: 964: 954: 943: 932: 921: 913: 909: 898: 833: 824: 817: 816: 781: 766: 759: 752: 743: 733: 717: 716: 706: 688: 664: 658: 657: 647: 641: 640: 604: 595: 594: 554: 545: 544: 542: 540: 525: 515: 510: 509: 508: 501: 496: 495: 494: 418: 411: 372:Acipenseriformes 311: 307: 300: 296: 265: 261: 224: 217: 204: 191: 141: 140: 112: 102: 39: 29:Temporal range: 21: 1754: 1753: 1749: 1748: 1747: 1745: 1744: 1743: 1679: 1678: 1677: 1676: 1617: 1616: 1557: 1556: 1492: 1487: 1479: 1474: 1466: 1461: 1453: 1451: 1442: 1441: 1436: 1423: 1413: 1404: 1385: 1369: 1288: 1199: 1148: 1111: 1095:Cylindracanthus 1080: 1067: 995: 905: 884: 869: 849: 818: 786: 785: 775: 770: 726: 721: 720: 666: 665: 661: 649: 648: 644: 606: 605: 598: 556: 555: 548: 538: 536: 527: 526: 522: 511: 506: 504: 497: 492: 490: 487: 477:Restoration of 280: 267: 259: 258: 245: 225:Egerton, 1858 ( 223: 215: 202: 189: 135: 103: 101: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 50: 45: 31: 30: 27: 17: 12: 11: 5: 1752: 1750: 1742: 1741: 1736: 1731: 1726: 1721: 1716: 1711: 1706: 1701: 1696: 1691: 1681: 1680: 1675: 1674: 1667: 1660: 1652: 1649: 1648: 1628: 1615: 1614: 1607: 1600: 1592: 1589: 1588: 1568: 1555: 1554: 1547: 1540: 1532: 1529: 1528: 1503: 1489: 1488: 1486: 1485: 1472: 1459: 1449: 1433: 1431: 1425: 1424: 1419: 1410: 1409: 1406: 1405: 1384: 1382: 1379: 1378: 1375: 1374: 1371: 1370: 1368: 1367: 1364:Scaphirhynchus 1360: 1353: 1343: 1333: 1326: 1323:Engdahlichthys 1316: 1313:Anchiacipenser 1306: 1298: 1296: 1290: 1289: 1287: 1286: 1283:Pugiopsephurus 1276: 1266: 1263:Protopsephurus 1256: 1249: 1239: 1236:Paleopsephurus 1229: 1218: 1216: 1207: 1205:Acipenseroidei 1201: 1200: 1198: 1197: 1190: 1183: 1176: 1169: 1161: 1159: 1157:Peipiaosteidae 1150: 1149: 1147: 1146: 1143:Strongylosteus 1139: 1132: 1124: 1122: 1120:Chondrosteidae 1113: 1112: 1110: 1109: 1106:Eochondrosteus 1099: 1087: 1081: 1076: 1073: 1072: 1069: 1068: 1066: 1065: 1062:Toarcocephalus 1058: 1051: 1044: 1037: 1030: 1023: 1016: 1008: 1006: 1004:Coccolepididae 997: 996: 994: 993: 982: 971: 960: 950: 939: 928: 916: 906: 901: 894: 893: 890: 889: 886: 885: 878: 875: 874: 871: 870: 868: 867: 866: 865: 859: 857: 851: 850: 848: 847: 846: 845: 843:Actinopterygii 836: 830: 828:Actinopterygii 820: 819: 815: 814: 805: 803:Actinopterygii 799: 793: 784: 777: 776: 771: 769: 768: 761: 754: 746: 740: 739: 725: 724:External links 722: 719: 718: 659: 642: 615:(1–4): 25–71. 596: 569:(4): 427–453. 546: 519: 518: 517: 516: 502: 486: 483: 463:Strongylosteus 454:Early Jurassic 435:Barrow-on-Soar 362:is related to 352:Early Jurassic 340:Chondrosteidae 317: 316: 315: 314: 303: 289: 288: 282: 281: 268: 254: 253: 247: 246: 238: 236: 232: 231: 229:Agassiz, 1834) 213: 209: 208: 206:Chondrosteidae 200: 196: 195: 187: 183: 182: 180:Actinopterygii 177: 173: 172: 167: 163: 162: 157: 153: 152: 147: 143: 142: 129: 128: 122:Teylers Museum 114: 113: 105: 104: 96: 91: 86: 81: 76: 71: 66: 61: 56: 51: 46: 41: 40: 28: 15: 13: 10: 9: 6: 4: 3: 2: 1751: 1740: 1737: 1735: 1732: 1730: 1727: 1725: 1722: 1720: 1717: 1715: 1712: 1710: 1707: 1705: 1702: 1700: 1697: 1695: 1692: 1690: 1687: 1686: 1684: 1673: 1668: 1666: 1661: 1659: 1654: 1653: 1647: 1645: 1641: 1637: 1634: 1629: 1626: 1622: 1613: 1608: 1606: 1601: 1599: 1594: 1593: 1587: 1585: 1581: 1577: 1574: 1569: 1566: 1562: 1553: 1548: 1546: 1541: 1539: 1534: 1533: 1527: 1525: 1521: 1517: 1513: 1509: 1504: 1501: 1497: 1482: 1477: 1473: 1469: 1464: 1460: 1456: 1450: 1445: 1439: 1435: 1434: 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178: 175: 174: 171: 168: 165: 164: 161: 158: 155: 154: 151: 148: 145: 144: 139: 134: 130: 127: 123: 119: 115: 111: 106: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 44: 38: 34: 26: 22: 19: 1644:expanding it 1630: 1584:expanding it 1570: 1524:expanding it 1505: 1429:Chondrosteus 1428: 1392: 1362: 1355: 1348: 1338: 1328: 1321: 1311: 1301: 1281: 1271: 1261: 1251: 1244: 1234: 1226:Crossopholis 1224: 1192: 1187:Stichopterus 1185: 1178: 1173:Peipiaosteus 1171: 1164: 1141: 1134: 1129:Chondrosteus 1128: 1127: 1104: 1093: 1060: 1053: 1046: 1039: 1032: 1025: 1018: 1011: 987: 976: 965: 955: 944: 935:Errolichthys 933: 922: 879: 807: 736:Chondrosteus 676: 672: 662: 652: 645: 612: 608: 566: 562: 558: 537:. Retrieved 531:Chondrosteus 530: 523: 478: 468:Chondrosteus 467: 461: 445: 444:The species 443: 431:Chondrosteus 430: 426: 422: 421:differ from 416:C. pachyurus 415: 408: 387: 386: 384: 376:Chondrosteus 375: 368:paddlefishes 360:Chondrosteus 359: 323:Chondrosteus 322: 321: 320: 309:C. pachyurus 308: 297: 273: 262: 257: 241: 240: 226: 220:Chondrosteus 219: 218: 120:fossil from 117: 25:Chondrosteus 24: 18: 1576:Chondrostei 1573:prehistoric 1506:This order 1180:Spherosteus 1027:Condorlepis 957:Neochallaia 903:Chondrostei 881:Chondrostei 855:Chondrostei 812:Actinopteri 773:Chondrostei 513:fish portal 409:C. crassior 391:, from the 298:C. crassior 1683:Categories 1578:fish is a 1516:Paddlefish 1041:Morrolepis 1020:Coccolepis 1013:Barbalepis 946:Gualolepis 864:see below↓ 485:References 397:Lyme Regis 380:caudal fin 348:Sinemurian 344:Hettangian 37:Sinemurian 33:Hettangian 1303:Acipenser 1273:Psephurus 1194:Yanosteus 1166:Liaosteus 1136:Gyrosteus 1055:Sunolepis 789:Kingdom: 695:2167-8359 679:: e8400. 539:March 16, 448:from the 393:Blue Lias 364:sturgeons 235:Species: 156:Kingdom: 150:Eukaryota 1633:Jurassic 1512:Sturgeon 1452:BioLib: 1444:Q3675399 1438:Wikidata 1253:Polyodon 1034:Iyalepis 924:Birgeria 797:Chordata 795:Phylum: 791:Animalia 713:32002331 637:24961905 591:86821521 450:Toarcian 286:Synonyms 272:, 1858 ( 199:Family: 170:Chordata 166:Phylum: 160:Animalia 146:Domain: 1468:4839343 801:Class: 704:6982408 617:Bibcode 571:Bibcode 458:Germany 439:Watchet 356:England 350:(early 334:marine 332:extinct 279:, 1834) 277:Agassiz 270:Egerton 260:† 239:† 212:Genus: 186:Order: 176:Class: 126:Haarlem 1455:828670 711:  701:  693:  635:  589:  452:(late 1638:is a 1481:34988 808:Clade 673:PeerJ 633:S2CID 587:S2CID 456:) of 328:genus 326:is a 1640:stub 1636:fish 1580:stub 1520:stub 1514:and 1463:GBIF 1330:Huso 841:see 709:PMID 691:ISSN 541:2012 414:and 366:and 346:and 43:PreꞒ 699:PMC 681:doi 625:doi 579:doi 395:of 330:of 35:to 1685:: 1478:: 1465:: 1440:: 810:: 707:. 697:. 689:. 675:. 671:. 631:. 623:. 613:48 611:. 599:^ 585:. 577:. 565:. 549:^ 358:. 274:ex 227:ex 124:, 93:Pg 1671:e 1664:t 1657:v 1646:. 1611:e 1604:t 1597:v 1586:. 1551:e 1544:t 1537:v 1526:. 1510:( 1346:† 1336:† 1319:† 1309:† 1279:† 1269:† 1259:† 1242:† 1232:† 1222:† 1154:† 1117:† 1102:† 1098:? 1091:† 1001:† 992:? 985:† 981:? 974:† 970:? 963:† 953:† 949:? 942:† 938:? 931:† 927:? 920:† 765:e 758:t 751:v 715:. 683:: 677:8 639:. 627:: 619:: 593:. 581:: 573:: 567:7 543:. 533:" 529:" 306:† 295:† 216:† 203:† 190:† 98:N 88:K 83:J 78:T 73:P 68:C 63:D 58:S 53:O 48:Ꞓ

Index

Hettangian
Sinemurian
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Teylers Museum
Haarlem
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Actinopterygii
Chondrosteiformes
Chondrosteidae
Chondrosteus
Binomial name
Egerton
Agassiz
Synonyms

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