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.
1272:"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" 1116:
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.
956:"Exceptionally preserved shark fossils from Mexico elucidate the long-standing enigma of the Cretaceous elasmobranch Ptychodus" 1337:
Shimada, Kenshu (October 31, 2012). "Dentition of Late Cretaceous shark, Ptychodus mortoni (Elasmobranchii, Ptychodontidae)".
1129:. Published by the author, Bourg-la-Reine, France, 100 pp., ISBN : 978-2-9565479-2-1 (printed), 978-2-9565479-3-8 (ebook) 894:). A 2024 study suggested that based on its body morphology, the species likely primarily consumed pelagic hard prey, like 1423:
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.
1498: 1158: 1156: 1154: 496: 483: 1270:Jambura, Patrick L.; Kriwet, JĂĽrgen (2020-04-22). 812:The only known complete body remains are from the 1265: 1263: 1256:https://doi.org/10.1016/j.cretres.2009.11.005 8: 1486: 694:Unlike the colossal nektonic planktivores 108: 20: 1313: 1295: 996:The paleobioloy Database Ptychodus entry 1198:supports neoselachian classification". 1069: 1067: 1065: 911: 286: 1641:Taxa named by Charles Lucien Bonaparte 1108:Brignon, A., 2015, Senior synonyms of 1051: 1040: 991: 989: 501:'tooth') is a genus of extinct large 7: 1243:https://doi.org/10.1671/039.029.0226 948: 946: 944: 942: 940: 641:are likely true sharks belonging to 1339:Journal of Vertebrate Paleontology 14: 1621:Cretaceous fish of North America 1464: 1449: 1435: 771: 755: 738: 722: 133: 551:1822 illustration of the first 816:in Mexico, which suggest that 1: 1631:Fossil taxa described in 1835 1096:10.1016/j.cretres.2011.09.014 559:Due to a global distribution 1359:10.1080/02724634.2012.707997 1297:10.1371/journal.pone.0231544 902:, rather than benthic prey. 686:Tooth morphology of several 605: 599: 1636:Taxa named by Louis Agassiz 674:required for verification. 597:comes from the Greek words 497: 484: 29:Temporal range: Early-Late 1657: 621:Size estimates of several 516:period, spanning from the 380:Chiplonkar and Ghare, 1977 1421:Williston, Samuel (1900) 762:(a) head and (b) tail of 493: 480: 279: 274: 261: 254: 130:Scientific classification 128: 121:sp. (MMSP CPC 3064) from 116: 107: 23: 1611:Prehistoric shark genera 919:Roberts, George (1839). 874:fed on bottom dwelling ( 866:is thought to have been 1382:Journal of Paleontology 1200:Journal of Paleontology 537:Western Interior Seaway 425:Ptychodus paucisulcatus 409:Ptychodus multistriatus 16:Extinct genus of sharks 1050:Cite journal requires 972:10.1098/rspb.2024.0262 691: 629:While the affinity of 626: 556: 377:Ptychodus mahakalensis 337:Ptychodus concentricus 324:Carrillo-Briceno, 2013 1578:Paleobiology Database 1114:Ptychodus mammillaris 685: 620: 550: 385:Ptychodus mammillaris 313:Ptychodus articulatus 117:Complete specimen of 1473:at Wikimedia Commons 1457:Palaeontology portal 1110:Ptychodus latissimus 835:(which includes the 814:Agua Nueva Formation 790:Ptychodus marginalis 729:Vertebral centra of 657:(mackerel sharks). 449:Ptychodus spectabili 393:Ptychodus marginalis 361:Ptychodus gibberulus 264:Ptychodus latissimus 123:Agua Nueva Formation 1394:2010JPal...84..538H 1351:2012JVPal..32.1271S 1288:2020PLoSO..1531544J 1220:10.1017/jpa.2016.64 1212:2016JPal...90..741H 1125:Brignon, A., 2019, 1088:2012CrRes..33..183V 1076:Cretaceous Research 1010:"Ptychodus mortoni" 998:accessed on 8/23/09 794:Ptychodus polygyrus 733:sp. EMRG-Chond-SK-1 700:(whale sharks) and 433:Ptychodus polygyrus 369:Ptychodus janewayii 345:Ptychodus decurrens 329:Ptychodus belluccii 321:Ptychodus atcoensis 1112:Agassiz, 1835 and 792:teeth differ from 692: 635:cartilaginous fish 627: 557: 457:Ptychodus whipplei 353:Ptychodus elevatus 305:Ptychodus arcuatus 297:Ptychodus anonymus 1616:Cretaceous sharks 1593: 1592: 1565:Open Tree of Life 1492:Taxon identifiers 1479:Ptychodus mortoni 1469:Media related to 827:great white shark 781:sp. MMSP CPC 3066 766:sp. MMSP CPC 3068 748:sp. MMSP CPC 3067 603:(fold/layer) and 593:The generic name 533:million years ago 505:(shell-crushing) 468: 467: 461: 453: 445: 441:Ptychodus rugosus 437: 429: 421: 413: 405: 401:Ptychodus mortoni 397: 389: 381: 373: 365: 357: 349: 341: 333: 325: 317: 309: 301: 293: 250: 228: 1648: 1626:Mooreville Chalk 1586: 1585: 1573: 1572: 1560: 1559: 1547: 1546: 1534: 1533: 1532: 1519: 1518: 1517: 1487: 1468: 1459: 1454: 1453: 1452: 1445: 1440: 1439: 1414: 1413: 1402:10.1666/09-154.1 1377: 1371: 1370: 1345:(6): 1271–1284. 1334: 1328: 1327: 1317: 1299: 1267: 1258: 1251: 1245: 1238: 1232: 1231: 1191: 1185: 1181:David, Michelle 1179: 1173: 1172: 1160: 1149: 1148: 1139:Everhard, Mike. 1136: 1130: 1123: 1117: 1106: 1100: 1099: 1071: 1060: 1059: 1053: 1048: 1046: 1038: 1032: 1024: 1018: 1017: 1008:Everhart, Mike. 1005: 999: 993: 984: 983: 950: 935: 934: 932: 930: 916: 775: 759: 742: 726: 633:as some kind of 608: 602: 500: 495: 487: 482: 459: 451: 443: 435: 427: 419: 411: 403: 395: 387: 379: 371: 363: 355: 347: 339: 331: 323: 315: 307: 299: 291: 289:Ptychodus altior 245: 238: 223: 218: 138: 137: 112: 102: 39: 21: 1656: 1655: 1651: 1650: 1649: 1647: 1646: 1645: 1596: 1595: 1594: 1589: 1581: 1576: 1568: 1563: 1555: 1550: 1542: 1537: 1528: 1527: 1522: 1513: 1512: 1507: 1494: 1455: 1450: 1448: 1441: 1434: 1431: 1418: 1417: 1379: 1378: 1374: 1336: 1335: 1331: 1282:(4): e0231544. 1269: 1268: 1261: 1252: 1248: 1239: 1235: 1193: 1192: 1188: 1180: 1176: 1162: 1161: 1152: 1145:Ocean of Kansas 1138: 1137: 1133: 1124: 1120: 1107: 1103: 1073: 1072: 1063: 1049: 1039: 1030: 1026: 1025: 1021: 1014:Ocean of Kansas 1007: 1006: 1002: 994: 987: 952: 951: 938: 928: 926: 918: 917: 913: 908: 861: 849: 810: 786: 785: 784: 783: 782: 776: 768: 767: 760: 751: 750: 749: 743: 735: 734: 727: 680: 668: 663: 615: 545: 464: 417:Ptychodus oweni 332:Bonarelli, 1899 300:Williston, 1900 285: 284: 270: 267: 244: 236: 222: 216: 132: 103: 101: 100: 95: 90: 85: 80: 75: 70: 65: 60: 55: 50: 45: 34: 33: 27: 17: 12: 11: 5: 1654: 1652: 1644: 1643: 1638: 1633: 1628: 1623: 1618: 1613: 1608: 1598: 1597: 1591: 1590: 1588: 1587: 1574: 1561: 1548: 1535: 1520: 1504: 1502: 1496: 1495: 1490: 1484: 1483: 1474: 1461: 1460: 1446: 1430: 1429:External links 1427: 1426: 1425: 1416: 1415: 1388:(3): 538–548. 1372: 1329: 1259: 1246: 1233: 1206:(4): 741–762. 1186: 1174: 1150: 1131: 1118: 1101: 1082:(1): 183–188. 1061: 1052:|journal= 1019: 1000: 985: 936: 910: 909: 907: 904: 900:marine turtles 882:(particularly 860: 857: 848: 845: 809: 806: 777: 770: 769: 761: 754: 753: 752: 744: 737: 736: 728: 721: 720: 719: 718: 717: 679: 676: 667: 664: 662: 659: 645:, rather than 614: 611: 573:affinities of 544: 541: 466: 465: 463: 462: 454: 446: 438: 430: 422: 414: 412:Woodward, 1889 406: 398: 390: 382: 374: 366: 358: 350: 342: 334: 326: 318: 310: 302: 294: 282: 281: 280: 277: 276: 275:Other species 272: 271: 268: 259: 258: 252: 251: 234: 230: 229: 220:Ptychodontidae 214: 210: 209: 204: 200: 199: 194: 190: 189: 187:Elasmobranchii 184: 180: 179: 177:Chondrichthyes 174: 170: 169: 164: 160: 159: 154: 150: 149: 144: 140: 139: 126: 125: 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: 1653: 1642: 1639: 1637: 1634: 1632: 1629: 1627: 1624: 1622: 1619: 1617: 1614: 1612: 1609: 1607: 1604: 1603: 1601: 1584: 1579: 1575: 1571: 1566: 1562: 1558: 1553: 1549: 1545: 1540: 1536: 1531: 1525: 1521: 1516: 1510: 1506: 1505: 1503: 1501: 1497: 1493: 1488: 1482: 1480: 1475: 1472: 1467: 1463: 1462: 1458: 1447: 1444: 1443:Sharks portal 1438: 1433: 1428: 1424: 1420: 1419: 1411: 1407: 1403: 1399: 1395: 1391: 1387: 1383: 1376: 1373: 1368: 1364: 1360: 1356: 1352: 1348: 1344: 1340: 1333: 1330: 1325: 1321: 1316: 1311: 1307: 1303: 1298: 1293: 1289: 1285: 1281: 1277: 1273: 1266: 1264: 1260: 1257: 1250: 1247: 1244: 1237: 1234: 1229: 1225: 1221: 1217: 1213: 1209: 1205: 1201: 1197: 1190: 1187: 1184: 1178: 1175: 1171:(4): 125–136. 1170: 1166: 1159: 1157: 1155: 1151: 1146: 1142: 1135: 1132: 1128: 1122: 1119: 1115: 1111: 1105: 1102: 1097: 1093: 1089: 1085: 1081: 1077: 1070: 1068: 1066: 1062: 1057: 1044: 1036: 1029: 1023: 1020: 1015: 1011: 1004: 1001: 997: 992: 990: 986: 981: 977: 973: 969: 965: 961: 957: 949: 947: 945: 943: 941: 937: 924: 923: 915: 912: 905: 903: 901: 897: 893: 889: 885: 881: 877: 873: 869: 865: 858: 856: 854: 846: 844: 842: 838: 834: 833: 828: 823: 819: 815: 807: 805: 803: 799: 795: 791: 780: 774: 765: 758: 747: 741: 732: 725: 716: 713: 709: 705: 704: 699: 698: 690:sp. specimens 689: 684: 677: 675: 672: 665: 660: 658: 656: 652: 648: 644: 643:Selachimorpha 640: 636: 632: 624: 619: 612: 610: 607: 601: 596: 591: 589: 583: 580: 576: 571: 567: 562: 554: 549: 542: 540: 538: 534: 529: 527: 524:. Fossils of 523: 519: 515: 511: 508: 504: 499: 491: 486: 478: 474: 473: 458: 455: 452:Agassiz, 1837 450: 447: 442: 439: 436:Agassiz, 1839 434: 431: 426: 423: 418: 415: 410: 407: 404:Agassiz, 1843 402: 399: 396:Agassiz, 1839 394: 391: 388:Agassiz, 1839 386: 383: 378: 375: 370: 367: 364:Agassiz, 1837 362: 359: 356:Leriche, 1929 354: 351: 348:Agassiz, 1839 346: 343: 340:Agassiz, 1839 338: 335: 330: 327: 322: 319: 316:Agassiz, 1837 314: 311: 308:Agassiz, 1837 306: 303: 298: 295: 292:Agassiz, 1839 290: 287: 278: 273: 269:Agassiz, 1835 266: 265: 260: 257: 253: 248: 243: 242: 235: 232: 231: 226: 221: 215: 212: 211: 208: 205: 202: 201: 198: 197:Selachimorpha 195: 193:Subdivision: 192: 191: 188: 185: 182: 181: 178: 175: 172: 171: 168: 165: 162: 161: 158: 155: 152: 151: 148: 145: 142: 141: 136: 131: 127: 124: 120: 115: 111: 106: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 44: 38: 32: 26: 22: 19: 1499: 1478: 1477:BBC page on 1422: 1385: 1381: 1375: 1342: 1338: 1332: 1279: 1275: 1249: 1236: 1203: 1199: 1195: 1189: 1177: 1168: 1164: 1144: 1134: 1126: 1121: 1113: 1109: 1104: 1079: 1075: 1043:cite journal 1034: 1022: 1013: 1003: 963: 959: 927:. Retrieved 921: 914: 878:) prey like 871: 863: 862: 852: 850: 847:Paleobiology 841:salmon shark 830: 817: 811: 802:P. polygyrus 801: 798:P marginalis 797: 793: 789: 787: 778: 763: 745: 730: 711: 707: 701: 695: 693: 687: 670: 669: 638: 630: 628: 622: 594: 592: 587: 584: 578: 574: 569: 565: 560: 558: 552: 530: 525: 471: 470: 469: 460:Marcou, 1858 456: 448: 440: 432: 424: 416: 408: 400: 392: 384: 376: 368: 360: 352: 344: 336: 328: 320: 312: 304: 296: 288: 263: 262: 256:Type species 240: 239: 219: 118: 35:105–75  24: 18: 1606:Lamniformes 1524:Wikispecies 929:31 December 888:crustaceans 884:inoceramids 868:durophagous 661:Description 655:Lamniformes 503:durophagous 488:'fold' and 444:Dixon, 1850 428:Dixon, 1850 420:Dixon, 1850 207:Lamniformes 1600:Categories 1165:Paludicola 1037:(7). 1970. 906:References 703:Cetorhinus 514:Cretaceous 372:Cope, 1874 183:Subclass: 31:Cretaceous 1530:Ptychodus 1500:Ptychodus 1471:Ptychodus 1410:130948112 1306:1932-6203 1228:132252846 1196:Ptychodus 980:0962-8452 896:ammonites 872:Ptychodus 864:Ptychodus 853:Ptychodus 837:porbeagle 818:Ptychodus 779:Ptychodus 764:Ptychodus 746:Ptychodus 731:Ptychodus 712:Ptychodus 708:Ptychodus 697:Rhincodon 688:Ptychodus 678:Dentition 671:Ptychodus 647:hybodonts 639:Ptychodus 631:Ptychodus 623:Ptychodus 595:Ptychodus 588:Ptychodus 579:Ptychodus 575:Ptychodus 570:Ptychodus 566:Ptychodus 561:Ptychodus 553:Ptychodus 543:Discovery 526:Ptychodus 522:Campanian 512:from the 507:lamniform 472:Ptychodus 241:Ptychodus 153:Kingdom: 147:Eukaryota 119:Ptychodus 25:Ptychodus 1509:Wikidata 1367:85133916 1324:32320430 1276:PLOS ONE 966:(2021). 880:bivalves 822:fusiform 613:Taxonomy 213:Family: 167:Chordata 163:Phylum: 157:Animalia 143:Domain: 1570:4143148 1557:4825164 1544:4655374 1515:Q648806 1390:Bibcode 1347:Bibcode 1315:7176087 1284:Bibcode 1208:Bibcode 1084:Bibcode 892:pelagic 876:benthic 651:batoids 600:ptychos 520:to the 247:Agassiz 233:Genus: 203:Order: 173:Class: 1408:  1365:  1322:  1312:  1304:  1226:  978:  886:) and 820:had a 555:teeth. 518:Albian 510:sharks 485:ptyche 475:(from 249:, 1835 227:, 1898 225:Jaekel 1583:34513 1406:S2CID 1363:S2CID 1224:S2CID 1031:(PDF) 832:Lamna 498:odoĂşs 494:ὀδούς 490:Greek 481:πτυχή 477:Greek 1552:GBIF 1320:PMID 1302:ISSN 1056:help 976:ISSN 931:2021 898:and 859:Diet 839:and 829:and 808:Body 666:Size 606:odon 283:List 43:Preęž’ 1539:EoL 1398:doi 1355:doi 1310:PMC 1292:doi 1216:doi 1092:doi 968:doi 964:291 843:). 649:or 1602:: 1580:: 1567:: 1554:: 1541:: 1526:: 1511:: 1404:. 1396:. 1386:84 1384:. 1361:. 1353:. 1343:32 1341:. 1318:. 1308:. 1300:. 1290:. 1280:15 1278:. 1274:. 1262:^ 1222:. 1214:. 1204:90 1202:. 1167:. 1153:^ 1143:. 1090:. 1080:33 1078:. 1064:^ 1047:: 1045:}} 1041:{{ 1033:. 1012:. 988:^ 974:. 962:. 958:. 939:^ 796:. 539:. 492:: 479:: 93:Pg 37:Ma 1412:. 1400:: 1392:: 1369:. 1357:: 1349:: 1326:. 1294:: 1286:: 1230:. 1218:: 1210:: 1169:4 1147:. 1098:. 1094:: 1086:: 1058:) 1054:( 1035:3 1016:. 982:. 970:: 933:. 237:† 217:† 98:N 88:K 83:J 78:T 73:P 68:C 63:D 58:S 53:O 48:ęž’

Index

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
Type species

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