Knowledge (XXG)

Macroelongatoolithus

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and thus laid two eggs simultaneously. The nests have unusually large volume of eggs compared to the body size of the parents, which could mean that multiple females would contribute to a single nest. Association of other oviraptorids with their eggs suggests extensive parental care was typical for
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of almost certainly all oviraptorosaurs were exposed in the nest without an external covering. Though most oviraptorosaur nests have eggs arranged in a circular fashion, the morphology of the nest is different in smaller and larger species in that the center of the nest is highly reduced in the
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eggs are most notable for their large size. They are at least 34 centimetres (13 in) long, but the largest specimens are over 60 centimetres (24 in) long. They are also very elongated, usually roughly three times longer than they are wide. They are often found in large
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specimens are extremely variable in size, shape, and microstructure, even in eggs laid by a single individual. For example, within a single clutch, the egg lengths can vary by several centimeters. The high amount of variability is probably due to their large size.
946:, oogen. nov. from the Lower Cretaceous Cedar Mountain Formation of Utah; pp. 221–223 in S. G. Lucas, J. I. Kirkland, and J. W. Estep (eds.), Lower and Middle Cretaceous Terrestrial Ecosystems. New Mexico Museum of Natural History and Science Bulletin No. 14. 1309:
Wang Qiang, Zhao Zikui, Wang Xiaolin, Jiang Yangen, and Zhang Shukang. (2010) "A New Oogenus Of Macroelongatoolithid Eggs From The Upper Cretaceous Chichengshan Formation Of The Tiantai Basin, Zhejiang Province And A Revision Of The Macroelongatoolithids"
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The surface ornamentation of the eggshells is variable, even on a single egg. It is usually lineartuberculate (nodes forming linear ridges), ramotuberculate (nodes forming irregular, meandering chains), or dispersituberculate (scattered nodes).
725:-sized animal likely sat on the area devoid of eggs. Tanaka and colleagues pointed out that this adaption was beneficial to avoid egg-crushing and could have allowed some body-contact during incubation in these giant oviraptorosaurs. 530:, the boundary between the continuous layer and the mammillary layer (the inner layer of the eggshell, also called the cone layer) is wavy, but clearly defined. The ratio of the thickness of the two layers varies from 2:1 to 8:1. 1355:
Huh, M., Kim, B. S., Woo, Y., Simon, D. J., Paik, I. S., & Kim, H. J. (2014). First record of a complete giant theropod egg clutch from Upper Cretaceous deposits, South Korea. Historical Biology, 26(2), 218–228.
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Simon, D. J.; Varricchio, D. J.; Jin, X.; Robinson, S. F. (2019). "Microstructural overlap of Macroelongatoolithus eggs from Asia and North America expands the occurrence of colossal oviraptorosaurs".
560:. While it is occasionally classified into a separate oofamily, Macroelongatoolithidae, the general consensus is that it is a member of Elongatoolithidae. Two other oospecies have also been described: 1029:
Zelenitsky DK, Carpenter K, Currie PJ. (2000) "First record of Elongatoolithid theropod eggshell from North America: the Asian oogenus Macroelongatoolithus from the lower Cretaceous of Utah."
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former species, and becomes significantly larger in the latter species. This nest configuration suggest that whereas smallest oviraptorosaurs probably sat directly on the eggs, a large,
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Li Y, Yin Z, Liu Y. (1995) "The discovery of a new genus of dinosaur egg from Xixia, Henan, China." Journal of Wuhan Institute of Chemical Technology 17(1): 38-41. (In Chinese)
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s eggshell is divided up into two structural layers, and the outer layer (called the continuous layer) is not divided up into distinct shell units, unlike other oofamilies. In
994:"Giant Dinosaur (theropod) Eggs of the Oogenus Macroelongatoolithus (Elongatoolithidae) from Southeastern Idaho: Taxonomic, Paleobiogeographic, and Reproductive Implications" 1327:
The spinicaudatan Tylestheria and biostratigraphic significance for the age of dinosaur eggs in the Upper Cretaceous Majiacun Formation, Xixia Basin, Henan Province, China.
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Qian, M. P., Jiang, Y., Jiang, Y. G., Zhang, Y. J., Chen, R., Li, L. M., and Xing, G. F. (2008). "New evidence on fossil eggs of Cretaceous Tyrannosaurs in eastern China."
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Kim, J. Y., Yang, S. Y., Choi, H. I., Seo, S. J., & Kim, K. S. (2011). Dinosaur eggs from the Cretaceous Goseong formation of Tongyeong City, southern coast of Korea.
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Pu, H.; Zelenitsky, D. K.; Lü, J.; Currie, P. J.; Carpenter, K.; Xu, L.; Koppelhus, E. B.; Jia, S.; Xiao, L.; Chuang, H.; Li, T.; Kundrát, M.; Shen, C. (2017).
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of up to 26 eggs, with the eggs forming a ring 2–3.3 metres (6.6–10.8 ft) in diameter. The shell is typically between 1.38 mm and 4.75 mm thick.
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GSA Field Guide 11: Field Guide to Plutons, Volcanoes, Faults, Reefs, Dinosaurs, and Possible Glaciation in Selected Areas of Arizona, California, and Nevada
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Carpenter, K. 1999. Eggs, Nests, and Baby Dinosaurs: A Look at Dinosaur Reproduction (Life of the Past). Indiana University Press, Bloomington, Indiana.
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X. Jin, Y. Azuma, F. D. Jackson and D. J. Varricchio. (2007) "Giant dinosaur eggs from the Tiantai basin, Zhejiang province, China."
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Tanaka, K.; Zelenitsky, D. K.; Lü, J.; DeBuhr, C. L.; Yi, L.; Jia, S.; Ding, F.; Xia, M.; Liu, D.; Shen, C.; Chen, R. (2018).
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Bonde, Varricchio and Jackson, Loope, Shirk, Joshua W., Frankie D. and David J., David B., and Aubrey M. (January 2008).
1480: 1490: 905: 1312: 993: 1391: 762: 595: 616:) on the basis of their huge size, egg shape and microstructural evidence suggests they are eggs of gigantic 810: 1405: 806: 459:, which they placed into a new oofamily, Macroelongatoolithidae. These three oospecies are now considered 374:. They are known from Asia and from North America. Historically, several oospecies have been assigned to 1437: 798: 794: 468: 846: 455:. It was classified in the oofamily Elongatoolithidae. Later in the same year, Wang and Zhou described 1246:"Dinosaurs and dunes! Sedimentology and paleontology of the Mesozoic in the Valley of Fire State Park" 1465: 1072: 444: 424: 416: 339: 324: 277: 249: 234: 223: 398: 834: 786: 1275: 1142: 830: 569: 460: 201: 1442: 860:
in the United States indicates that there was likely a giant oviraptorosaur present during the
1261: 1226: 1100: 1061:"Perinate and eggs of a giant caenagnathid dinosaur from the Late Cretaceous of central China" 818: 641: 519: 175: 1253: 1216: 1206: 1134: 1090: 1080: 897: 822: 770: 766: 754: 556:. Several oospecies have been described, but currently they are all considered synonyms of 861: 826: 778: 652:
was described, based on an embryonic specimen (named "Baby Louie") associated with 6 to 8
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nests were buried in vegetation or sediments. Like other elongatoolithids,
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Brigham Young University research studies. Geology Series. Geology Studies
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Grellet-Tinner, G., Chiappe, L., Norell, M., and Bottjer, D. (2006). "
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Dinosaur eggs and nesting behaviors: a paleobiological investigation.
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of numerous oviraptorosaur specimens, including egg clutches of
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was laid by large oviraptorosaurs, in this case caenagnathids.
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eggs are laid in pairs because the parents had two functional
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Jensen J. 1970. Fossil eggs in the lower cretaceous of Utah.
761:. More specifically, it is known in North America from the 1325:
Li, G., Chen, P., Wang, D., & Batten, D. J. (2009). "
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and from Aphae-do in Shinan-gun, Jeollanam-do Province.
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While they were once considered to be the eggs of large
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remains, and unique nests. In 2017 the caenagnathid
1412: 868:. Also, the fact that they have been found in both 667:The gas conductance of the eggshells indicate that 1181:Palaeogeography, Palaeoclimatology, Palaeoecology, 880:interchange of fauna between the two continents. 1344:Journal of the Paleontological Society of Korea 1001:Doctoral Dissertation, Montana State University 913:, the avian dinosaur that laid the largest egg. 494:Eggshell surface (a) and microstructure (b) of 987: 985: 983: 981: 8: 1358:https://doi.org/10.1080/08912963.2014.894998 1280:: CS1 maint: multiple names: authors list ( 979: 977: 975: 973: 971: 969: 967: 965: 963: 961: 700:In 2018, Kohei Tanaka and team examined the 1120: 1118: 1116: 1114: 1400: 109: 20: 1220: 1210: 1094: 1084: 1054: 1052: 1050: 656:eggs and partial nest. The discovery of 922: 264: 216: 1273: 845:. It is known in South Korea from the 367:eggs, representing the eggs of giant 7: 1010:from the original on 11 August 2021. 942:Bray, E. S. 1998. Dinosaur eggshell 872:and North America is evidence of an 660:further concludes that the oogenus 1297:Canadian Journal of Earth Sciences 1252:. Vol. 11. pp. 249–262. 1127:Journal of Vertebrate Paleontology 1032:Journal of Vertebrate Paleontology 695:American Museum of Natural History 14: 1476:Fossil parataxa described in 1995 805:. In China, it is known from the 435:, which was then classified as a 331:Macroelongatoolithus goseongensis 1385: 1371: 890: 471:, but the name was corrected to 133: 712:configuration and body size to 636:eggs closely resemble those of 552:has a convoluted parataxonomic 304:Macroelongatoolithus xixiaensis 586:Macroelongatoolithus carlylei. 568:, but both are now considered 1: 1139:10.1080/02724634.2018.1553046 457:Longiteresoolithus xixiaensis 296:Longiteresoolithus xixiaensis 123:Naturhistorisches Museum Wien 741:eggs have been found in the 708:, in order to correlate the 578:Megafusoolithus qiaoxiaensis 576:. The oogenus and oospecies 553: 431:was moved to a new oogenus, 284:Megafusoolithus qiaoxiaensis 602:(41HV003-16) nest with eggs 451:, with a single oospecies: 397:nest (MNHM-nat201153) from 316:Macroelongatoolithus zhangi 1507: 1486:Dinosaurs of North America 1313:Acta Paleontologica Sinica 944:Boletuoolithus carlylensis 906:List of dinosaur oogenera 207: 200: 130:Egg fossil classification 128: 117: 108: 23: 467:was named first, it has 1258:10.1130/2008.fld011(11) 811:Chichengshan Formations 443:was first described in 16:Oogenus of dinosaur egg 1212:10.1098/rsbl.2018.0135 753:, ranging in age from 697: 603: 504: 405: 1471:Dinosaur reproduction 1438:Paleobiology Database 1065:Nature Communications 992:Simon, D. J. (2014). 799:Willow Tank Formation 795:Thomas Fork Formation 686: 598: 524:Macroelongatoolithus' 498:eggs associated with 493: 393: 1414:Macroelongatoolithus 1393:Macroelongatoolithus 1382:at Wikimedia Commons 1379:Macroelongatoolithus 858:Macroelongatoolithus 835:Zoumagang Formations 797:of Wyoming, and the 739:Macroelongatoolithus 714:incubation behaviour 706:Macroelongatoolithus 673:Macroelongatoolithus 669:Macroelongatoolithus 662:Macroelongatoolithus 654:Macroelongatoolithus 634:Macroelongatoolithus 600:Macroelongatoolithus 550:Macroelongatoolithus 538:Macroelongatoolithus 528:Macroelongatoolithus 508:Macroelongatoolithus 496:Macroelongatoolithus 441:Macroelongatoolithus 395:Macroelongatoolithus 386:History of discovery 376:Macroelongatoolithus 353:Macroelongatoolithus 190:Macroelongatoolithus 119:Macroelongatoolithus 25:Macroelongatoolithus 1331:Cretaceous Research 1086:10.1038/ncomms14952 1077:2017NatCo...814952P 787:Blackleaf Formation 299:Wang and Zhou, 1995 698: 680:elongatoolithids. 604: 505: 406: 260:Oospecies synonymy 230:Longiteresoolithus 1481:Dinosaurs of Asia 1453: 1452: 1406:Taxon identifiers 1376:Media related to 1333:, 30(2): 477-482. 1267:978-0-8137-0011-3 847:Goseong Formation 819:Zhejiang Province 771:Kelvin Formations 642:Elongatoolithidae 415:was described in 349: 348: 342: 327: 312: 300: 292: 280: 261: 252: 237: 226: 213: 196: 176:Elongatoolithidae 1498: 1491:Elongatoolithids 1446: 1445: 1433: 1432: 1431: 1401: 1390:Data related to 1389: 1375: 1360: 1353: 1347: 1340: 1334: 1323: 1317: 1307: 1301: 1292: 1286: 1285: 1279: 1271: 1241: 1235: 1234: 1224: 1214: 1190: 1184: 1183:232(2): 294-321. 1173: 1164: 1157: 1151: 1150: 1122: 1109: 1108: 1098: 1088: 1071:(14952): 14952. 1056: 1045: 1042: 1036: 1027: 1012: 1011: 1009: 998: 989: 956: 953: 947: 940: 934: 927: 900: 898:Dinosaurs portal 895: 894: 893: 856:The presence of 755:Early Cretaceous 520:elongatoolithids 333: 318: 306: 298: 286: 272: 259: 243: 232: 221: 212:Oogenus synonymy 211: 194: 187: 174: 163:Ornithoid-ratite 144:Basic shell type 138: 137: 113: 103: 40: 29:Temporal range: 21: 1506: 1505: 1501: 1500: 1499: 1497: 1496: 1495: 1456: 1455: 1454: 1449: 1441: 1436: 1427: 1426: 1421: 1408: 1368: 1363: 1354: 1350: 1341: 1337: 1324: 1320: 1308: 1304: 1293: 1289: 1272: 1268: 1243: 1242: 1238: 1205:(5): 20180135. 1199:Biology Letters 1192: 1191: 1187: 1174: 1167: 1161:Jiangsu Geology 1158: 1154: 1133:(6): e1553046. 1124: 1123: 1112: 1058: 1057: 1048: 1043: 1039: 1035:20(1): 130-138. 1028: 1015: 1007: 996: 991: 990: 959: 954: 950: 941: 937: 928: 924: 920: 896: 891: 889: 886: 862:Late Cretaceous 779:Wayan Formation 736: 731: 618:oviraptorosaurs 593: 566:M. goseongensis 547: 488: 388: 372:oviraptorosaurs 345: 263: 262: 255: 241:Megafusoolithus 233:Wang and Zhou, 215: 214: 195:Li et al., 1995 193: 185: 172: 132: 104: 102: 101: 96: 91: 86: 81: 76: 71: 66: 61: 56: 51: 46: 35: 34: 27: 17: 12: 11: 5: 1504: 1502: 1494: 1493: 1488: 1483: 1478: 1473: 1468: 1458: 1457: 1451: 1450: 1448: 1447: 1434: 1418: 1416: 1410: 1409: 1404: 1398: 1397: 1396:at Wikispecies 1383: 1367: 1366:External links 1364: 1362: 1361: 1348: 1335: 1318: 1302: 1287: 1266: 1236: 1185: 1165: 1152: 1110: 1046: 1037: 1013: 957: 948: 935: 921: 919: 916: 915: 914: 908: 902: 901: 885: 882: 839:Henan Province 815:Tiantai County 763:Cedar Mountain 735: 732: 730: 727: 687:Reconstructed 608:tyrannosaurids 592: 589: 582:junior synonym 574:M. carlylensis 546: 545:Classification 543: 487: 484: 465:M. carlylensis 433:Boletuoolithus 429:O. carlylensis 399:Aphaedo Island 387: 384: 380:M. carlylensis 347: 346: 344: 343: 328: 313: 301: 293: 281: 258: 257: 256: 254: 253: 238: 227: 219:Boletuoolithus 210: 209: 208: 205: 204: 198: 197: 183: 179: 178: 170: 166: 165: 160: 153: 152: 147: 140: 139: 126: 125: 115: 114: 106: 105: 97: 92: 87: 82: 77: 72: 67: 62: 57: 52: 47: 42: 41: 28: 15: 13: 10: 9: 6: 4: 3: 2: 1503: 1492: 1489: 1487: 1484: 1482: 1479: 1477: 1474: 1472: 1469: 1467: 1464: 1463: 1461: 1444: 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Bozeman. 821:, from the 751:South Korea 613:Tarbosaurus 558:M. carlylei 518:Like other 486:Description 403:South Korea 270:carlylensis 1460:Categories 933:17: 51-65. 918:References 878:Cenomanian 658:Beibeilong 650:Beibeilong 623:Beibeilong 580:is also a 570:synonymous 501:Beibeilong 478:to follow 461:synonymous 169:Oofamily: 157:Morphotype 31:Cretaceous 1300:44:81-88. 1276:cite book 1147:191155027 851:Tongyeong 646:embryonic 562:M. zhangi 360:of large 182:Oogenus: 150:Ornithoid 1429:Q6725267 1423:Wikidata 1231:29769301 1105:28486442 1005:Archived 884:See also 831:Majiacun 677:oviducts 513:clutches 476:carlylei 469:priority 411:Oolithes 365:dinosaur 362:theropod 268:Oolithes 202:Synonyms 1222:6012691 1096:5477524 1073:Bibcode 791:Montana 554:history 358:oogenus 1264:  1229:  1219:  1145:  1103:  1093:  874:Albian 833:, and 823:Gaogou 803:Nevada 793:, the 785:, the 777:, the 769:, and 767:Dakota 749:, and 693:nest, 620:(like 610:(like 449:et al. 447:by Li 356:is an 311:, 1995 291:, 2010 274:Jensen 222:Bray, 1443:98798 1143:S2CID 1008:(PDF) 997:(PDF) 849:near 843:China 827:Sigou 783:Idaho 747:China 572:with 423:. In 336:et al 321:et al 319:Fang 309:et al 289:et al 287:Wang 246:et al 244:Wang 1282:link 1262:ISBN 1227:PMID 1101:PMID 870:Asia 809:and 775:Utah 718:eggs 710:nest 564:and 480:ICZN 445:1995 425:1998 417:1970 340:2011 334:Kim 325:2000 278:1970 250:2010 235:1995 224:1998 44:PreꞒ 1254:doi 1217:PMC 1207:doi 1135:doi 1091:PMC 1081:doi 864:in 837:in 813:in 801:of 789:of 781:of 773:of 757:to 632:). 626:or 584:of 419:by 307:Li 1462:: 1440:: 1425:: 1329:" 1278:}} 1274:{{ 1260:. 1248:. 1225:. 1215:. 1203:14 1201:. 1197:. 1179:" 1168:^ 1141:. 1131:38 1129:. 1113:^ 1099:. 1089:. 1079:. 1067:. 1063:. 1049:^ 1016:^ 999:. 960:^ 841:, 829:, 825:, 817:, 765:, 745:, 522:, 473:M. 439:. 427:, 401:, 382:. 338:, 323:, 276:, 248:, 159:: 146:: 94:Pg 38:Ma 33:, 1284:) 1270:. 1256:: 1233:. 1209:: 1149:. 1137:: 1107:. 1083:: 1075:: 1069:8 876:- 640:( 409:" 186:† 173:† 99:N 89:K 84:J 79:T 74:P 69:C 64:D 59:S 54:O 49:Ꞓ

Index

Cretaceous
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Naturhistorisches Museum Wien
Egg fossil classification
Edit this classification
Ornithoid
Ornithoid-ratite
Elongatoolithidae
Macroelongatoolithus
Synonyms
1998
1995
2010
Oolithes
Jensen
1970
2000

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