Knowledge (XXG)

Ptychodus

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jaw contains many teeth, up to 550 teeth, 220 of which are on the lower jaw and 260 in the upper jaw. These teeth were very large as well—Paleontologists believe that the largest tooth plate measured 55 centimeters in length and 45 centimeters in width. There are two distinct formations of tooth
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was a large shark, previously estimated at 10 meters (33 feet) long based on extrapolation from tooth. The subadult specimen with the largest vertebra showed that it could reach lengths of 4.3–7.07 m (14.1–23.2 ft), so a 10 m (33 ft) length is possible, but more analysis is
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teeth have long been identified as palates of diodon, or porcupinefish (Osteichthyes, Diodontidae), well-known for their ability to inflate their bodies in defense. At the beginning of the 19th century, several authors including Swiss paleontologist Louis Agassiz eventually demonstrated the
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Shimada, K., Everhart, M. J., Decker, R., & Decker, P. D. (2010). A new skeletal remain of the durophagous shark, Ptychodus mortoni, from the Upper Cretaceous of North America: an indication of gigantic body size. Cretaceous Research, 31(2), 249–254.
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body, with a large and elongate head, the primarily dorsal fin was large and placed forward on the body while the second posterior dorsal fin was much smaller, with a small anal fin being present. The overall body form closely resembles that of the
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Fossils of species within this genus have been found in the marine strata of United States, Brazil, Canada, the Czech Republic, France, Germany, India, Israel, Japan, Jordan, Mexico, Sweden, and the United Kingdom. The fact that so many fossils of
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is well represented in the fossil record; many fossils have been uncovered such as isolated teeth, fragments of dentition, calcified vertebral centra, denticles, and associated fragments of calcified cartilage. The very first remains of
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Shimada, K., Rigsby, C. K., & Kim, S. H. (2009). Partial skull of Late Cretaceous durophagous shark,Ptychodus occidentalis(Elasmobranchii: Ptychodontidae), from Nebraska, U.S.A.. Journal of Vertebrate Paleontology, 29(2), 336–349.
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Vullo, Romain; Villalobos-Segura, Eduardo; Amadori, Manuel; Kriwet, Jürgen; Frey, Eberhard; González González, Margarito A.; Padilla Gutiérrez, José M.; Ifrim, Christina; Stinnesbeck, Eva S.; Stinnesbeck, Wolfgang (2024-04-30).
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teeth in Kansas came in 1868 when Leidy reported and described a damaged tooth near Fort Hays, Kansas. After, many more teeth were uncovered in almost perfect conditions and other species within the genus were identified.
1283:"Articulated remains of the extinct shark Ptychodus (Elasmobranchii, Ptychodontidae) from the Upper Cretaceous of Spain provide insights into gigantism, growth rate and life history of ptychodontid sharks" 1127:
Agassiz, 1835 (Elasmobranchii) based on teeth from the Bohemian Cretaceous Basin (the Czech Republic). Acta Musei Nationalis Pragae, Series B – Historia Naturalis, 71(1–2): 5–14
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At least 16 species are considered valid, with the largest members of the genus suggested to have grown up to 10 meters (33 feet) long. The youngest remains date to around 75
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Hoffman, Brian L.; Hageman, Scott A.; Claycomb, Gregory D. (July 2016). "Scanning electron microscope examination of the dental enameloid of the Cretaceous durophagous shark
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Everhart, Michael; Caggiano, Tom (2004). "An associated dentition and calcified vertebral centra of the Late Cretaceous elasmobranch, Ptychodus anonymus Williston 1900".
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It is believed that the shape coincides with the diet of the species and their geographic locations, but the time it lived has a big part as well.
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Verma, Omkar; et al. (February 1, 2012). "Ptychodus decurrens Agassiz (Elasmobranchii: Ptychodontidae) from the Upper Cretaceous of India".
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A historical and mechanical description of Ptychodus (Chondrichthyes) dententions with notes on the distribution and systematics of the genus
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have been found in different regions of the world provides evidence of a distribution of species during the Albian-Turonian time.
967:"Exceptionally preserved shark fossils from Mexico elucidate the long-standing enigma of the Cretaceous elasmobranch Ptychodus" 1348:
Shimada, Kenshu (October 31, 2012). "Dentition of Late Cretaceous shark, Ptychodus mortoni (Elasmobranchii, Ptychodontidae)".
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University Geological Survey of Kansas, Volume VI: Paleontology part II, (Carboniferous invertebrates and Cretaceous fish)
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plates between the genus; one being juxtaposed, non-overlapping tooth rows, and another being imbricated tooth rows.
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Hamm, Shawn (May 2010). "The Late Cretaceous shark Ptychodus marginalis in the Western Interior Seaway, USA".
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has long been accepted, the exact position in the group was long uncertain. A 2016 publication found that
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Le diodon devenu requin : l'histoire des premières dĂ©couvertes du genre Ptychodus (Chondrichthyes)
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lived relatively long lives and were slow growing and produced large offspring and small litters.
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as previously thought. A 2024 study of a complete skeleton concluded that they belong to the
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was in the Middle Cenomanian to Middle Turonian deposits in the English Chalk, while
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An etymological and explanatory dictionary of the terms and language of geology
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teeth with those of elasmobranchs (rays and sharks). The first discovery of
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Based on analysis of vertebrae from Spain, it is suggested that species of
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were found in England and Germany in the first half of the 18th century.
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teeth are found in many Late Cretaceous marine sediments worldwide.
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species compared to an 1.8 m (5.9 ft) tall human
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Proceedings of the Royal Society B: Biological Sciences
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had a massive arrangement of crushing plate teeth. A
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was in the Late Santonian-Early Campanian deposits.
1509: 1169: 1167: 1165: 507: 494: 1281:Jambura, Patrick L.; Kriwet, JĂĽrgen (2020-04-22). 823:The only known complete body remains are from the 1276: 1274: 1267:https://doi.org/10.1016/j.cretres.2009.11.005 8: 1497: 705:Unlike the colossal nektonic planktivores 119: 31: 1324: 1306: 1007:The paleobioloy Database Ptychodus entry 1209:supports neoselachian classification". 1080: 1078: 1076: 922: 297: 1652:Taxa named by Charles Lucien Bonaparte 1119:Brignon, A., 2015, Senior synonyms of 1062: 1051: 1002: 1000: 512:'tooth') is a genus of extinct large 7: 1254:https://doi.org/10.1671/039.029.0226 959: 957: 955: 953: 951: 652:are likely true sharks belonging to 1350:Journal of Vertebrate Paleontology 25: 1632:Cretaceous fish of North America 1475: 1460: 1446: 782: 766: 749: 733: 144: 562:1822 illustration of the first 827:in Mexico, which suggest that 1: 1642:Fossil taxa described in 1835 1107:10.1016/j.cretres.2011.09.014 570:Due to a global distribution 1370:10.1080/02724634.2012.707997 1308:10.1371/journal.pone.0231544 913:, rather than benthic prey. 697:Tooth morphology of several 616: 610: 1647:Taxa named by Louis Agassiz 685:required for verification. 608:comes from the Greek words 508: 495: 40:Temporal range: Early-Late 1668: 632:Size estimates of several 527:period, spanning from the 391:Chiplonkar and Ghare, 1977 1432:Williston, Samuel (1900) 773:(a) head and (b) tail of 504: 491: 290: 285: 272: 265: 141:Scientific classification 139: 132:sp. (MMSP CPC 3064) from 127: 118: 34: 1622:Prehistoric shark genera 930:Roberts, George (1839). 885:fed on bottom dwelling ( 877:is thought to have been 1393:Journal of Paleontology 1211:Journal of Paleontology 548:Western Interior Seaway 436:Ptychodus paucisulcatus 420:Ptychodus multistriatus 27:Extinct genus of sharks 1061:Cite journal requires 983:10.1098/rspb.2024.0262 702: 640:While the affinity of 637: 567: 388:Ptychodus mahakalensis 348:Ptychodus concentricus 335:Carrillo-Briceno, 2013 1589:Paleobiology Database 1125:Ptychodus mammillaris 696: 631: 561: 396:Ptychodus mammillaris 324:Ptychodus articulatus 128:Complete specimen of 1484:at Wikimedia Commons 1468:Palaeontology portal 1121:Ptychodus latissimus 846:(which includes the 825:Agua Nueva Formation 801:Ptychodus marginalis 740:Vertebral centra of 668:(mackerel sharks). 460:Ptychodus spectabili 404:Ptychodus marginalis 372:Ptychodus gibberulus 275:Ptychodus latissimus 134:Agua Nueva Formation 1405:2010JPal...84..538H 1362:2012JVPal..32.1271S 1299:2020PLoSO..1531544J 1231:10.1017/jpa.2016.64 1223:2016JPal...90..741H 1136:Brignon, A., 2019, 1099:2012CrRes..33..183V 1087:Cretaceous Research 1021:"Ptychodus mortoni" 1009:accessed on 8/23/09 805:Ptychodus polygyrus 744:sp. EMRG-Chond-SK-1 711:(whale sharks) and 444:Ptychodus polygyrus 380:Ptychodus janewayii 356:Ptychodus decurrens 340:Ptychodus belluccii 332:Ptychodus atcoensis 1123:Agassiz, 1835 and 803:teeth differ from 703: 646:cartilaginous fish 638: 568: 468:Ptychodus whipplei 364:Ptychodus elevatus 316:Ptychodus arcuatus 308:Ptychodus anonymus 18:Ptychodus anonymus 1627:Cretaceous sharks 1604: 1603: 1576:Open Tree of Life 1503:Taxon identifiers 1490:Ptychodus mortoni 1480:Media related to 838:great white shark 792:sp. MMSP CPC 3066 777:sp. MMSP CPC 3068 759:sp. MMSP CPC 3067 614:(fold/layer) and 604:The generic name 544:million years ago 516:(shell-crushing) 479: 478: 472: 464: 456: 452:Ptychodus rugosus 448: 440: 432: 424: 416: 412:Ptychodus mortoni 408: 400: 392: 384: 376: 368: 360: 352: 344: 336: 328: 320: 312: 304: 261: 239: 16:(Redirected from 1659: 1637:Mooreville Chalk 1597: 1596: 1584: 1583: 1571: 1570: 1558: 1557: 1545: 1544: 1543: 1530: 1529: 1528: 1498: 1479: 1470: 1465: 1464: 1463: 1456: 1451: 1450: 1425: 1424: 1413:10.1666/09-154.1 1388: 1382: 1381: 1356:(6): 1271–1284. 1345: 1339: 1338: 1328: 1310: 1278: 1269: 1262: 1256: 1249: 1243: 1242: 1202: 1196: 1192:David, Michelle 1190: 1184: 1183: 1171: 1160: 1159: 1150:Everhard, Mike. 1147: 1141: 1134: 1128: 1117: 1111: 1110: 1082: 1071: 1070: 1064: 1059: 1057: 1049: 1043: 1035: 1029: 1028: 1019:Everhart, Mike. 1016: 1010: 1004: 995: 994: 961: 946: 945: 943: 941: 927: 786: 770: 753: 737: 644:as some kind of 619: 613: 511: 506: 498: 493: 470: 462: 454: 446: 438: 430: 422: 414: 406: 398: 390: 382: 374: 366: 358: 350: 342: 334: 326: 318: 310: 302: 300:Ptychodus altior 256: 249: 234: 229: 149: 148: 123: 113: 50: 32: 21: 1667: 1666: 1662: 1661: 1660: 1658: 1657: 1656: 1607: 1606: 1605: 1600: 1592: 1587: 1579: 1574: 1566: 1561: 1553: 1548: 1539: 1538: 1533: 1524: 1523: 1518: 1505: 1466: 1461: 1459: 1452: 1445: 1442: 1429: 1428: 1390: 1389: 1385: 1347: 1346: 1342: 1293:(4): e0231544. 1280: 1279: 1272: 1263: 1259: 1250: 1246: 1204: 1203: 1199: 1191: 1187: 1173: 1172: 1163: 1156:Ocean of Kansas 1149: 1148: 1144: 1135: 1131: 1118: 1114: 1084: 1083: 1074: 1060: 1050: 1041: 1037: 1036: 1032: 1025:Ocean of Kansas 1018: 1017: 1013: 1005: 998: 963: 962: 949: 939: 937: 929: 928: 924: 919: 872: 860: 821: 797: 796: 795: 794: 793: 787: 779: 778: 771: 762: 761: 760: 754: 746: 745: 738: 691: 679: 674: 626: 556: 475: 428:Ptychodus oweni 343:Bonarelli, 1899 311:Williston, 1900 296: 295: 281: 278: 255: 247: 233: 227: 143: 114: 112: 111: 106: 101: 96: 91: 86: 81: 76: 71: 66: 61: 56: 45: 44: 38: 28: 23: 22: 15: 12: 11: 5: 1665: 1663: 1655: 1654: 1649: 1644: 1639: 1634: 1629: 1624: 1619: 1609: 1608: 1602: 1601: 1599: 1598: 1585: 1572: 1559: 1546: 1531: 1515: 1513: 1507: 1506: 1501: 1495: 1494: 1485: 1472: 1471: 1457: 1441: 1440:External links 1438: 1437: 1436: 1427: 1426: 1399:(3): 538–548. 1383: 1340: 1270: 1257: 1244: 1217:(4): 741–762. 1197: 1185: 1161: 1142: 1129: 1112: 1093:(1): 183–188. 1072: 1063:|journal= 1030: 1011: 996: 947: 921: 920: 918: 915: 911:marine turtles 893:(particularly 871: 868: 859: 856: 820: 817: 788: 781: 780: 772: 765: 764: 763: 755: 748: 747: 739: 732: 731: 730: 729: 728: 690: 687: 678: 675: 673: 670: 656:, rather than 625: 622: 584:affinities of 555: 552: 477: 476: 474: 473: 465: 457: 449: 441: 433: 425: 423:Woodward, 1889 417: 409: 401: 393: 385: 377: 369: 361: 353: 345: 337: 329: 321: 313: 305: 293: 292: 291: 288: 287: 286:Other species 283: 282: 279: 270: 269: 263: 262: 245: 241: 240: 231:Ptychodontidae 225: 221: 220: 215: 211: 210: 205: 201: 200: 198:Elasmobranchii 195: 191: 190: 188:Chondrichthyes 185: 181: 180: 175: 171: 170: 165: 161: 160: 155: 151: 150: 137: 136: 125: 124: 116: 115: 107: 102: 97: 92: 87: 82: 77: 72: 67: 62: 57: 52: 51: 39: 26: 24: 14: 13: 10: 9: 6: 4: 3: 2: 1664: 1653: 1650: 1648: 1645: 1643: 1640: 1638: 1635: 1633: 1630: 1628: 1625: 1623: 1620: 1618: 1615: 1614: 1612: 1595: 1590: 1586: 1582: 1577: 1573: 1569: 1564: 1560: 1556: 1551: 1547: 1542: 1536: 1532: 1527: 1521: 1517: 1516: 1514: 1512: 1508: 1504: 1499: 1493: 1491: 1486: 1483: 1478: 1474: 1473: 1469: 1458: 1455: 1454:Sharks portal 1449: 1444: 1439: 1435: 1431: 1430: 1422: 1418: 1414: 1410: 1406: 1402: 1398: 1394: 1387: 1384: 1379: 1375: 1371: 1367: 1363: 1359: 1355: 1351: 1344: 1341: 1336: 1332: 1327: 1322: 1318: 1314: 1309: 1304: 1300: 1296: 1292: 1288: 1284: 1277: 1275: 1271: 1268: 1261: 1258: 1255: 1248: 1245: 1240: 1236: 1232: 1228: 1224: 1220: 1216: 1212: 1208: 1201: 1198: 1195: 1189: 1186: 1182:(4): 125–136. 1181: 1177: 1170: 1168: 1166: 1162: 1157: 1153: 1146: 1143: 1139: 1133: 1130: 1126: 1122: 1116: 1113: 1108: 1104: 1100: 1096: 1092: 1088: 1081: 1079: 1077: 1073: 1068: 1055: 1047: 1040: 1034: 1031: 1026: 1022: 1015: 1012: 1008: 1003: 1001: 997: 992: 988: 984: 980: 976: 972: 968: 960: 958: 956: 954: 952: 948: 935: 934: 926: 923: 916: 914: 912: 908: 904: 900: 896: 892: 888: 884: 880: 876: 869: 867: 865: 857: 855: 853: 849: 845: 844: 839: 834: 830: 826: 818: 816: 814: 810: 806: 802: 791: 785: 776: 769: 758: 752: 743: 736: 727: 724: 720: 716: 715: 710: 709: 701:sp. specimens 700: 695: 688: 686: 683: 676: 671: 669: 667: 663: 659: 655: 654:Selachimorpha 651: 647: 643: 635: 630: 623: 621: 618: 612: 607: 602: 600: 594: 591: 587: 582: 578: 573: 565: 560: 553: 551: 549: 545: 540: 538: 535:. Fossils of 534: 530: 526: 522: 519: 515: 510: 502: 497: 489: 485: 484: 469: 466: 463:Agassiz, 1837 461: 458: 453: 450: 447:Agassiz, 1839 445: 442: 437: 434: 429: 426: 421: 418: 415:Agassiz, 1843 413: 410: 407:Agassiz, 1839 405: 402: 399:Agassiz, 1839 397: 394: 389: 386: 381: 378: 375:Agassiz, 1837 373: 370: 367:Leriche, 1929 365: 362: 359:Agassiz, 1839 357: 354: 351:Agassiz, 1839 349: 346: 341: 338: 333: 330: 327:Agassiz, 1837 325: 322: 319:Agassiz, 1837 317: 314: 309: 306: 303:Agassiz, 1839 301: 298: 289: 284: 280:Agassiz, 1835 277: 276: 271: 268: 264: 259: 254: 253: 246: 243: 242: 237: 232: 226: 223: 222: 219: 216: 213: 212: 209: 208:Selachimorpha 206: 204:Subdivision: 203: 202: 199: 196: 193: 192: 189: 186: 183: 182: 179: 176: 173: 172: 169: 166: 163: 162: 159: 156: 153: 152: 147: 142: 138: 135: 131: 126: 122: 117: 110: 105: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 49: 43: 37: 33: 30: 19: 1510: 1489: 1488:BBC page on 1433: 1396: 1392: 1386: 1353: 1349: 1343: 1290: 1286: 1260: 1247: 1214: 1210: 1206: 1200: 1188: 1179: 1175: 1155: 1145: 1137: 1132: 1124: 1120: 1115: 1090: 1086: 1054:cite journal 1045: 1033: 1024: 1014: 974: 970: 938:. Retrieved 932: 925: 889:) prey like 882: 874: 873: 863: 861: 858:Paleobiology 852:salmon shark 841: 828: 822: 813:P. polygyrus 812: 809:P marginalis 808: 804: 800: 798: 789: 774: 756: 741: 722: 718: 712: 706: 704: 698: 681: 680: 649: 641: 639: 633: 605: 603: 598: 595: 589: 585: 580: 576: 571: 569: 563: 541: 536: 482: 481: 480: 471:Marcou, 1858 467: 459: 451: 443: 435: 427: 419: 411: 403: 395: 387: 379: 371: 363: 355: 347: 339: 331: 323: 315: 307: 299: 274: 273: 267:Type species 251: 250: 230: 129: 46:105–75  35: 29: 1617:Lamniformes 1535:Wikispecies 940:31 December 899:crustaceans 895:inoceramids 879:durophagous 672:Description 666:Lamniformes 514:durophagous 499:'fold' and 455:Dixon, 1850 439:Dixon, 1850 431:Dixon, 1850 218:Lamniformes 1611:Categories 1176:Paludicola 1048:(7). 1970. 917:References 714:Cetorhinus 525:Cretaceous 383:Cope, 1874 194:Subclass: 42:Cretaceous 1541:Ptychodus 1511:Ptychodus 1482:Ptychodus 1421:130948112 1317:1932-6203 1239:132252846 1207:Ptychodus 991:0962-8452 907:ammonites 883:Ptychodus 875:Ptychodus 864:Ptychodus 848:porbeagle 829:Ptychodus 790:Ptychodus 775:Ptychodus 757:Ptychodus 742:Ptychodus 723:Ptychodus 719:Ptychodus 708:Rhincodon 699:Ptychodus 689:Dentition 682:Ptychodus 658:hybodonts 650:Ptychodus 642:Ptychodus 634:Ptychodus 606:Ptychodus 599:Ptychodus 590:Ptychodus 586:Ptychodus 581:Ptychodus 577:Ptychodus 572:Ptychodus 564:Ptychodus 554:Discovery 537:Ptychodus 533:Campanian 523:from the 518:lamniform 483:Ptychodus 252:Ptychodus 164:Kingdom: 158:Eukaryota 130:Ptychodus 36:Ptychodus 1520:Wikidata 1378:85133916 1335:32320430 1287:PLOS ONE 977:(2021). 891:bivalves 833:fusiform 624:Taxonomy 224:Family: 178:Chordata 174:Phylum: 168:Animalia 154:Domain: 1581:4143148 1568:4825164 1555:4655374 1526:Q648806 1401:Bibcode 1358:Bibcode 1326:7176087 1295:Bibcode 1219:Bibcode 1095:Bibcode 903:pelagic 887:benthic 662:batoids 611:ptychos 531:to the 258:Agassiz 244:Genus: 214:Order: 184:Class: 1419:  1376:  1333:  1323:  1315:  1237:  989:  897:) and 831:had a 566:teeth. 529:Albian 521:sharks 496:ptyche 486:(from 260:, 1835 238:, 1898 236:Jaekel 1594:34513 1417:S2CID 1374:S2CID 1235:S2CID 1042:(PDF) 843:Lamna 509:odoĂşs 505:ὀδούς 501:Greek 492:πτυχή 488:Greek 1563:GBIF 1331:PMID 1313:ISSN 1067:help 987:ISSN 942:2021 909:and 870:Diet 850:and 840:and 819:Body 677:Size 617:odon 294:List 54:Preęž’ 1550:EoL 1409:doi 1366:doi 1321:PMC 1303:doi 1227:doi 1103:doi 979:doi 975:291 854:). 660:or 1613:: 1591:: 1578:: 1565:: 1552:: 1537:: 1522:: 1415:. 1407:. 1397:84 1395:. 1372:. 1364:. 1354:32 1352:. 1329:. 1319:. 1311:. 1301:. 1291:15 1289:. 1285:. 1273:^ 1233:. 1225:. 1215:90 1213:. 1178:. 1164:^ 1154:. 1101:. 1091:33 1089:. 1075:^ 1058:: 1056:}} 1052:{{ 1044:. 1023:. 999:^ 985:. 973:. 969:. 950:^ 807:. 550:. 503:: 490:: 104:Pg 48:Ma 1423:. 1411:: 1403:: 1380:. 1368:: 1360:: 1337:. 1305:: 1297:: 1241:. 1229:: 1221:: 1180:4 1158:. 1109:. 1105:: 1097:: 1069:) 1065:( 1046:3 1027:. 993:. 981:: 944:. 248:† 228:† 109:N 99:K 94:J 89:T 84:P 79:C 74:D 69:S 64:O 59:ęž’ 20:)

Index

Ptychodus anonymus
Cretaceous
Ma
Preęž’
ęž’
O
S
D
C
P
T
J
K
Pg
N

Agua Nueva Formation
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Chondrichthyes
Elasmobranchii
Selachimorpha
Lamniformes
Ptychodontidae
Jaekel
Ptychodus
Agassiz

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