609:
889:
766:
808:
726:
688:
265:
253:
563:
365:
Numerous fossils are known from the unit, mostly ammonites and bivalves, but also marine vertebrates such as mosasaurs, plesiosaurs and marine turtles. Dinosaur remains are among the fossils that have been recovered from the group. These include a partial
2962:"3D models related to the publication: Interacting with the inaccessible: utilization of multimedia-based visual contents of Japan's National Monument, the Taniwhasaurus mikasaensis (Mosasauridae) holotype for educational workshops at Mikasa City Museum"
2307:
Takashima, Reishi; Kawabe, Fumihisa; Nishi, Hiroshi; Moriya, Kazuyoshi; Wani, Ryoji; Ando, Hisao (June 2004). "Geology and stratigraphy of forearc basin sediments in
Hokkaido, Japan: Cretaceous environmental events on the north-west Pacific margin".
2517:
Weishampel, David B; et al. (2004). "Dinosaur distribution (Late
Cretaceous, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 593-600.
3055:
3102:
3460:
2472:
Murakami, Mizuki; Hirayama, Ren; Hikida, Yoshinori; Hirano, Hiromichi (December 2008). "A theropod dinosaur (Saurischia: Maniraptora) from the Upper
Cretaceous Yezo Group of Hokkaido, Northern Japan".
2540:
Sakurai, Kazuhiko; Sato, Tamaki; Chinzorig, Tsogtbaatar; Tanaka, Kohei; Fiorillo, Anthony R.; Chiba, Kentaro; Takasaki, Ryuji; Nishimura, Tomohiro; Kobayashi, Yoshitsugu (September 5, 2019).
3690:"A Multicarpellary Apocarpous Gynoecium from the Late Cretaceous (Coniacian–Santonian) of the Upper Yezo Group of Obira, Hokkaido, Japan: Obirafructus kokubunii gen. & sp. nov"
2831:"A new halisaurine mosasaur (Squamata: Halisaurinae) from Japan: the first record in the western Pacific realm and the first documented insights into binocular vision in mosasaurs"
2609:
127:
119:
2409:"New therizinosaurid dinosaur from the marine Osoushinai Formation (Upper Cretaceous, Japan) provides insight for function and evolution of therizinosaur claws"
383:
147:
143:
123:
1687:
139:
2605:, an unusual land turtle of family Nanhsiungchelyidae (Superfamily Treionychoidea; Order Testudines) from the Upper Cretaceous of Hokkaido, North Japan"
135:
2884:
3555:"Mikasapteris rothwellii gen. et sp. nov., a Permineralized Fertile Pinnule of a Probable Stem Polypod from the Late Cretaceous of Hokkaido, Japan"
2186:
1596:
161:
131:
3414:"New records of coleoid cephalopod jaws from the Upper Cretaceous of Hokkaido, Japan, and their paleobiogeographic and evolutionary implications"
2078:
1758:
1042:
351:
180:
165:
2145:
2038:
1847:
1349:
1316:
1159:
1082:
2913:"Pliosaurid (Reptilia: Sauropterygia) remains from the Upper Cretaceous of Japan, and their biostratigraphic and paleogeographic significance"
3103:"A Second Specimen of the Crossognathiform Fish Apsopelix miyazakii from the Cretaceous Yezo Group of Mikasa Area, Central Hokkaido, Japan"
1121:
3879:
2542:"A New Hadrosaurine (Dinosauria: Hadrosauridae) from the Marine Deposits of the Late Cretaceous Hakobuchi Formation, Yezo Group, Japan"
3342:"Late Cretaceous record of large soft-bodied coleoids based on lower jaw remains from Hokkaido, Japan - Acta Palaeontologica Polonica"
1479:
1414:
3844:
3829:
2261:
1991:
2634:"The oldest Asian hesperornithiform from the Upper Cretaceous of Japan, and the phylogenetic reassessment of Hesperornithiformes"
3824:
3819:
3503:"Anatomically preserved fossil cornalean fruits from the Upper Cretaceous of Hokkaido: Eydeia hokkaidoensis gen. et sp. nov"
2723:"Mesodermochelys (Testudines; Chelonioidea; Dermochelyidae) from the Late Cretaceous of Nakagawa-cho, Hokkaido, North Japan"
2600:
3605:"Evolutionary diversification of taiwanioid conifers: evidence from a new Upper Cretaceous seed cone from Hokkaido, Japan"
2688:
2407:
Kobayashi, Yoshitsugu; Takasaki, Ryuji; Fiorillo, Anthony R.; Chinzorig, Tsogtbaatar; Hikida, Yoshinori (2022-05-03).
3884:
2523:
323:
3909:
3814:
3761:"Structurally preserved Zamites bayeri Kvaček from the Coniacian Kashima Formation (Yezo Group) of Hokkaido, Japan"
3056:"Apsopelix miyazakii, a New Species of Crossognathid Fish (Teleostei) from the Upper Cretaceous of Hokkaido, Japan"
2911:
Sato, Tamaki; Nagai, Katsuhisa; Echizenya, Hiroki; Shinmura, Tatsuya; Hikida, Yoshinori; Soeda, Yuji (2023-05-26).
608:
3919:
3476:
3369:
3914:
314:). It is exposed as roughly north–south trending belt extending 1,500 kilometres through central Hokkaido from
3370:"The Upper Cretaceous Hakobuchi Formation of the Yezo Group in the Kotanbetsu area, Hokkaido, northeast Japan"
2632:
Tanaka, Tomonori; Kobayashi, Yoshitsugu; Kurihara, Ken'ichi; Fiorillo, Anthony R.; Kano, Manabu (2018-06-21).
3899:
3894:
3874:
2829:
Konishi, Takuya; Caldwell, Michael W.; Nishimura, Tomohiro; Sakurai, Kazuhiko; Tanoue, Kyo (2016-10-02).
2779:"Discovery of chemosynthesis-based association on the Cretaceous basal leatherback sea turtle from Japan"
1066:"One nodal and two pluricolumnals, associated on a bedding plane, so probably from a single individual".
2282:
3101:
Miyata, Shinya; Yabumoto, Yoshitaka; Nakajima, Yasuhisa; Ito, Yasuhiro; Sasaki, Takenori (April 2022).
2353:
Kaim, Andrzej; Kobayashi, Yoshitsugu; Echizenya, Hiroki; Jenkins, Robert G.; Tanabe, Kazushige (2008).
3760:
3553:
Nishida, Harufumi; Stockey, Ruth A.; Takebe, Yusuke; Legrand, Julien; Yamada, Toshihiro (2022-07-25).
3216:
2777:
Jenkins, Robert; Kaim, Andrzej; Sato, Kei; Moriya, Kazuhiro; Hikida, Yoshinori; Hirayama, Ren (2017).
3849:
3008:
3904:
3869:
3864:
3859:
3854:
2689:"1022 Family Dermochelyidae (Superfamily Chelonioidea) from the Upper Cretaceous of North Japan"
3720:
gen. nov. (Cupressaceae), and the evolutionary diversification of sequoioid conifer seed cones"
3009:"Redescription of the first pterosaur remains from Japan: the largest flying reptile from Asia"
221:
3889:
3839:
3834:
2067:
736:
375:
3663:
Nilssonia yezoensis, sp. nov., from the Upper
Cretaceous Hakobuchi group, in Hokkaido, Japan
3412:
Tanabe, Kazushige; Misaki, Akihiro; Hikida, Yoshinori; Nishimura, Tomohiro (February 2017).
3772:
3616:
3554:
3425:
3228:
3020:
2924:
2842:
2645:
2598:
2553:
2420:
2317:
8:
2125:
2089:
2026:
787:
668:
584:
541:
410:
393:
359:
283:
151:
109:
3776:
3620:
3429:
3341:
3232:
3024:
2928:
2846:
2649:
2557:
2424:
2321:
880:
also known from New
Zealand, Antarctica, and South Africa; originally informally named '
3637:
3604:
3582:
3391:
3316:
3252:
3130:
3083:
2989:
2866:
2808:
2669:
2576:
2541:
2497:
2449:
2408:
2384:
971:
367:
2599:
Ren
Hirayama; Kazuhiko Sakurai; Tsutomu Chitoku; Gentaro Kawakami; Norio Kito (2001).
3788:
3741:
3715:
3689:
3667:
3642:
3586:
3574:
3532:
3524:
3480:
3441:
3395:
3320:
3308:
3284:
3256:
3244:
3192:
3165:"Crinoid diversity in the Upper Cretaceous Yezo Supergroup, Hokkaido, northern Japan"
3164:
3134:
3122:
3087:
3075:
3036:
2993:
2981:
2961:
2942:
2870:
2858:
2800:
2778:
2722:
2673:
2661:
2581:
2519:
2501:
2489:
2454:
2436:
2388:
2376:
2114:
844:
519:
371:
343:
339:
315:
3007:
Kellner, Alexander W.A.; R. Costa, Fabiana; Wang, Xiaolin; Cheng, Xin (2016-02-17).
2812:
2704:
888:
765:
3780:
3731:
3632:
3624:
3566:
3514:
3472:
3433:
3413:
3381:
3300:
3236:
3184:
3176:
3114:
3067:
3028:
2973:
2932:
2850:
2790:
2700:
2653:
2571:
2561:
2481:
2444:
2428:
2366:
2333:
2325:
1744:
1228:
975:
898:
483:
3784:
3437:
3240:
3217:"Aptian ammonite fauna from the Yezo Group of the Urakawa area in Hokkaido, Japan"
3032:
2937:
2912:
2854:
2657:
2329:
338:
mudstones and sandstones with subordinate conglomerate primarily deposited on the
2618:
1928:
1895:
1736:
1705:
1676:
1669:
1647:
1618:
1499:
1432:
1297:
1271:
1240:
989:
776:
758:
573:
303:
2830:
2633:
807:
3628:
3304:
3180:
3071:
2566:
2432:
2168:
2064:
2053:
2014:
643:
598:
3188:
2290:
The
Cretaceous System in the Makarov Area, Southern Sakhalin, Russian Far East
3808:
3792:
3745:
3671:
3578:
3528:
3484:
3445:
3312:
3248:
3196:
3126:
3079:
3040:
2985:
2946:
2862:
2804:
2665:
2493:
2440:
2380:
2244:
1446:
1285:
856:
839:
718:
698:
555:
466:
407:
388:
327:
66:
31:
2977:
3646:
3536:
3386:
2795:
2585:
2458:
2212:
2175:
2103:
874:
817:
797:
677:
335:
3736:
3501:
Stockey, Ruth A.; Nishida, Harufumi; Atkinson, Brian A. (September 2016).
2371:
319:
2485:
1914:
1381:
725:
687:
530:
494:
402:
41:
3519:
3502:
3054:
Yabumoto, Yoshitaka; Hikida, Yoshinori; Nishino, Takanobu (April 2012).
2355:"Chemosynthesis-Based Associations on Cretaceous Plesiosaurid Carcasses"
911:
Large sized form with an estimated wingspan of 6.8 metres (22 ft).
1868:
1836:
1811:
1790:
1747:
1513:
1402:
1305:
1248:
1009:
826:
657:
347:
331:
86:
51:
17:
2338:
3661:
3118:
2235:
2202:
2198:
2161:
2157:
2096:
2007:
2003:
1935:
1638:
1634:
1608:
1550:
1525:
1458:
1171:
1138:
1100:
1096:
1060:
1056:
960:
510:
506:
397:
380:
355:
311:
207:
91:
2171:
reproductive axis bearing at least 42 spirally arranged follicles."
1055:
Unknown locality, possibly in south-central
Hokkaido, thought to be
3570:
3289:(Coleoidea: Vampyromorphida) from the Tuironian of Hokkaido, Japan"
2354:
2021:
1903:
1879:
1859:
1827:
1802:
1779:
1716:
1663:
1585:
1575:
1559:
1534:
1393:
1370:
1338:
1258:
1196:
1134:
979:
877:
830:
800:
751:
709:
680:
636:
632:
628:
548:
414:
295:
287:
240:
236:
203:
81:
76:
61:
56:
46:
3688:
Kajita, Yui; Suzuki, Mayumi Hanari; Nishida, Harufumi (May 2020).
2406:
1662:
Satonosawa Creek and
Gakkonosawa Creek, Hokkaido (middle and late
2223:
2057:
1468:
1148:
1110:
1070:
591:
434:
217:
169:
96:
71:
3461:"Two coleoid jaws from the Upper Cretaceous of Hokkaido, Japan"
2828:
2631:
1893:
2 articulated specimens found associated with the remains of a
1770:
1549:
Uppermost
Haborogawa Formation (middle-upper part of the lower
1524:
Uppermost Haborogawa Formation (middle-upper part of the lower
1361:
1329:
646:
601:
307:
299:
270:
3603:
Stockey, Ruth A.; Nishida, Harufumi; Rothwell, Gar W. (2020).
1614:"KMNH IvP 902,001, a lower jaw, the only specimen available."
562:
2352:
2134:
1959:
291:
258:
3459:
Tanabe, Kazushige; Hikida, Yoshinori; Iba, Yasuhiro (2006).
2471:
1177:
One pluricolumnal and five very poorly preserved columnals.
358:. The sequence gradually shallows upwards with the terminal
3552:
3477:
10.1666/0022-3360(2006)080[0138:TCJFTU]2.0.CO;2
3411:
928:
2910:
2539:
2306:
870:
A fragmentary skull, not diagnostic to the species level.
3100:
1497:
A single specimen found associated with the remains of a
1430:
A single specimen found associated with the remains of a
1295:
A single specimen found associated with the remains of a
1269:
A single specimen found associated with the remains of a
1238:
A single specimen found associated with the remains of a
3006:
2513:
2511:
793:
A well-preserved skull with some associated vertebrae.
350:. It forms a continuous depositional sequence with the
3602:
3500:
803:
with proportionately large eyes and binocular vision.
3053:
2776:
2508:
2283:"Yezo Group Research in Sakhalin—A Historical Review"
3687:
1734:3 specimens found associated with the remains of a
3714:Rothwell, Gar W.; Ohana, Tamiko (September 2016).
3283:Tanabe, Kazushige; Hikida, Yoshinori (June 2010).
2727:Bulletin of the Nakagawa Museum of Natural History
908:Fragmentary femur, phalanx, and cervical vertebra
3806:
392:is known from an unnamed unit of the group from
362:representing a fluvial-inner shelf environment.
3458:
2960:Matsui, Kumiko; Karasawa, Tomoki (2020-10-18).
2721:Hirayama, Ren; Hikida, Yoshinori (March 1998).
2686:
547:"A nearly complete skeleton with the skull and
417:, was also discovered in layers of this group.
3374:The Journal of the Geological Society of Japan
2959:
2720:
2535:
2533:
2531:
3713:
842:remains, some with skull sizes comparable to
3282:
2281:Shigeta, Yasunari; Maeda, Haruyoshi (2005).
2280:
587:and upper part of the Osoushinai Formation.
2528:
2296:. National Science Museum Monographs: 1–24.
3735:
3636:
3518:
3385:
2936:
2794:
2575:
2565:
2448:
2370:
2337:
1699:Hokkaido (Santonian to lower Campanian).
3214:
2687:Hirayama, Ren; Chitoku, Tsutomu (1996).
2262:List of dinosaur-bearing rock formations
1957:
1194:
1007:
926:
432:
3559:International Journal of Plant Sciences
3367:
1103:portions of the Haborogawa Formation).
3807:
3758:
3496:
3494:
3407:
3405:
3363:
3361:
3336:
3334:
3332:
3330:
3278:
3276:
3274:
3272:
3270:
3268:
3266:
3162:
2906:
2904:
2772:
2770:
2768:
2766:
2764:
2762:
2760:
1607:Uppermost Haborogawa Formation (lower
3709:
3707:
3683:
3681:
3598:
3596:
3548:
3546:
3210:
3208:
3206:
3158:
3156:
3154:
3152:
3150:
3148:
3146:
3144:
2824:
2822:
2758:
2756:
2754:
2752:
2750:
2748:
2746:
2744:
2742:
2740:
2716:
2714:
322:and Sakhalin from the south coast to
2402:
2400:
2398:
477:Hobetsu-cho, Hokkaido. (Cenomanian)
3694:Acta Phytotaxonomica et Geobotanica
3491:
3452:
3402:
3358:
3327:
3263:
2901:
2835:Journal of Systematic Palaeontology
2638:Journal of Systematic Palaeontology
1858:Satonosawa Creek, Hokkaido (middle
1826:Satonosawa Creek, Hokkaido (middle
1392:Satonosawa Creek, Hokkaido (middle
13:
3704:
3678:
3593:
3543:
3203:
3141:
2819:
2737:
2711:
1801:Gakkonosawa Creek, Hokkaido (late
1574:Gakkonosawa Creek, Hokkaido (late
1457:Upper Haborogawa Formation (Upper
887:
806:
764:
724:
686:
607:
561:
14:
3931:
3659:
2395:
1464:"KMNH IvP 902,002, a lower jaw."
590:-NMV-3, a proximal half of right
420:
324:Alexandrovsk-Sakhalinsky District
3759:Yamada, Toshihiro (2009-10-01).
406:, which is known from the early
263:
251:
39:
3845:Upper Cretaceous Series of Asia
3830:Lower Cretaceous Series of Asia
3752:
3653:
3163:HUNTER, AARON W. (2012-12-12).
3094:
3047:
3000:
2953:
2877:
2705:10.14825/prpsj1951.1996.184_597
2680:
1954:
1191:
1004:
923:
429:
354:, which overlies the Horokanai
3215:Futakami, Masao (2018-09-01).
2625:
2610:Russian Journal of Herpetology
2592:
2465:
2346:
2300:
2274:
1000:
190:10,000 metres (32,810 ft)
1:
3880:Cretaceous–Paleogene boundary
3825:Geologic formations of Russia
3785:10.1016/j.cretres.2009.07.007
3438:10.1016/j.cretres.2016.10.009
3241:10.1016/j.cretres.2018.03.025
3033:10.1080/08912963.2015.1028929
2938:10.1016/j.cretres.2023.105593
2855:10.1080/14772019.2015.1113447
2783:Acta Palaeontologica Polonica
2658:10.1080/14772019.2017.1341960
2359:Acta Palaeontologica Polonica
2330:10.1016/j.cretres.2004.02.004
2267:
1950:
1520:I. (Sphenoceramus) orientalis
3820:Geologic formations of Japan
2617:(2): 127–138. Archived from
1962:reported from the Yezo Group
1199:reported from the Yezo Group
1133:Haborogawa Formation (upper
1012:reported from the Yezo Group
931:reported from the Yezo Group
437:reported from the Yezo Group
7:
2255:
1545:I. (Sphenoceramus) schmidti
1187:
635:, and associated with many
425:
400:or early Campanian in age.
10:
3936:
3629:10.1007/s10265-020-01214-y
3507:American Journal of Botany
3368:Tsujino, Yasuyuki (2009).
3305:10.2517/1342-8144-14.2.145
3181:10.11646/zoosymposia.7.1.7
3072:10.2517/1342-8144-16.1.037
2567:10.1038/s41598-019-48607-1
2433:10.1038/s41598-022-11063-5
15:
3609:Journal of Plant Research
3285:"Jaws of a New Species of
2889:eprints.lib.hokudai.ac.jp
2099:2 cm long, 1.1 cm wide."
1788:
1594:
1511:
836:4 indeterminate remains.
571:
246:
232:
227:
213:
199:
194:
186:
176:
157:
115:
105:
30:
25:
3885:Paleogene System of Asia
3293:Paleontological Research
3107:Paleontological Research
3060:Paleontological Research
2474:Paleontological Research
833:localities in Hokkaido.
754:and partial right hand.
594:(Osoushinai Formation).
386:from northern Hokkaido.
370:and right hand from the
326:. It consists of marine
16:Not to be confused with
3910:Conglomerate formations
3815:Geologic groups of Asia
3465:Journal of Paleontology
2978:10.18563/journal.m3.106
1581:Disarticulated valves.
919:
882:Yezosaurus mikasaensis'
3920:Paleontology in Russia
3387:10.5575/geosoc.115.122
2796:10.4202/app.00405.2017
2603:Anomalochelys angulata
2197:Hoborogawa Formation (
2156:Haborogawa Formation (
2095:"A single cylindrical
2024:similar to the extant
2002:Haborogawa Formation (
1925:Osoushinai Formation.
1890:Osoushinai Formation.
1731:Osoushinai Formation.
1494:Osoushinai Formation.
1427:Osoushinai Formation.
1292:Osoushinai Formation.
1266:Osoushinai Formation.
1235:Osoushinai Formation.
892:
811:
769:
747:Osoushinai Formation.
729:
691:
624:Osoushinai Formation.
612:
566:
128:Hikagenosawa Formation
3915:Paleontology in Japan
3737:10.1139/cjb-2016-0025
2372:10.4202/app.2008.0106
2068:leptosporangiate fern
891:
810:
768:
737:Paralitherizinosaurus
728:
690:
611:
565:
376:Paralitherizinosaurus
330:sediments, typically
120:Shuparogawa Formation
3900:Sandstone formations
2486:10.2517/prpsj.12.421
1769:Tsukenai Formation (
1360:Tsukenai Formation (
1328:Tsukenai Formation (
820:gen. et. sp. indet.
384:Osoushinai Formation
346:of the ancient Yezo
148:Osoushinai Formation
144:Haborogawa Formation
3895:Mudstone formations
3875:Maastrichtian Stage
3777:2009CrRes..30.1301Y
3765:Cretaceous Research
3621:2020JPlR..133..681S
3520:10.3732/ajb.1600151
3430:2017CrRes..70..128T
3418:Cretaceous Research
3233:2018CrRes..89..224F
3221:Cretaceous Research
3025:2016HBio...28..304K
2929:2023CrRes.15005593S
2917:Cretaceous Research
2847:2016JSPal..14..809K
2650:2018JSPal..16..689T
2558:2019NatSR...912389K
2425:2022NatSR..12.7207K
2322:2004CrRes..25..365T
2310:Cretaceous Research
2234:Kashima Formation (
2126:Hakobuchi Formation
2090:Hakobuchi Formation
2027:Davidia involucrata
1144:One pluricolumnal.
1106:One pluricolumnal.
867:Kashima Formation.
788:Hakobuchi Formation
669:Hakobuchi Formation
585:Hakobuchi Formation
542:Hakobuchi Formation
505:Kashima Formation (
411:Hakobuchi Formation
360:Hakobuchi Formation
302:which is primarily
284:stratigraphic group
152:Hakobuchi Formation
110:Stratigraphic group
32:Stratigraphic range
3189:20.500.11937/60598
3013:Historical Biology
2546:Scientific Reports
2413:Scientific Reports
1174:upper Yezo Group.
893:
812:
770:
730:
692:
613:
567:
124:Maruyama Formation
2253:
2252:
2049:Mikasa Locality.
1948:
1947:
1688:Paleocirroteuthis
1185:
1184:
998:
997:
917:
916:
845:Megacephalosaurus
520:hesperornithiform
394:Southern Sakhalin
368:cervical vertebra
348:subduction margin
340:continental shelf
276:
275:
140:Kashima Formation
3927:
3850:Cenomanian Stage
3797:
3796:
3771:(5): 1301–1306.
3756:
3750:
3749:
3739:
3711:
3702:
3701:
3685:
3676:
3675:
3660:Okubo, Atsushi.
3657:
3651:
3650:
3640:
3600:
3591:
3590:
3550:
3541:
3540:
3522:
3513:(9): 1642–1656.
3498:
3489:
3488:
3456:
3450:
3449:
3409:
3400:
3399:
3389:
3365:
3356:
3355:
3353:
3352:
3338:
3325:
3324:
3280:
3261:
3260:
3212:
3201:
3200:
3160:
3139:
3138:
3119:10.2517/PR200024
3098:
3092:
3091:
3051:
3045:
3044:
3019:(1–2): 304–309.
3004:
2998:
2997:
2957:
2951:
2950:
2940:
2908:
2899:
2898:
2896:
2895:
2885:"HUSCAP journal"
2881:
2875:
2874:
2826:
2817:
2816:
2798:
2774:
2735:
2734:
2718:
2709:
2708:
2699:(184): 597–622.
2684:
2678:
2677:
2629:
2623:
2622:
2596:
2590:
2589:
2579:
2569:
2537:
2526:
2515:
2506:
2505:
2469:
2463:
2462:
2452:
2404:
2393:
2392:
2374:
2350:
2344:
2343:
2341:
2304:
2298:
2297:
2287:
2278:
2193:S. interdigitata
2063:A probable stem
1998:E. hokkaidoensis
1955:
1388:G. denseplicatum
1229:Abyssochrysoidea
1192:
1005:
978:area, Hokkaido (
924:
899:Pterodactyloidea
783:P. ponpetelegans
705:N. sachalinensis
627:A carapace with
484:nanhsiungchelyid
430:
396:, probably late
269:
267:
266:
257:
255:
254:
136:Mikasa Formation
101:
38:
37:Aptian–Paleocene
23:
22:
3935:
3934:
3930:
3929:
3928:
3926:
3925:
3924:
3905:Tuff formations
3870:Campanian Stage
3865:Santonian Stage
3860:Coniacian Stage
3805:
3804:
3801:
3800:
3757:
3753:
3712:
3705:
3686:
3679:
3658:
3654:
3601:
3594:
3551:
3544:
3499:
3492:
3457:
3453:
3410:
3403:
3366:
3359:
3350:
3348:
3340:
3339:
3328:
3281:
3264:
3213:
3204:
3161:
3142:
3099:
3095:
3052:
3048:
3005:
3001:
2958:
2954:
2909:
2902:
2893:
2891:
2883:
2882:
2878:
2841:(10): 809–839.
2827:
2820:
2775:
2738:
2719:
2712:
2693:日本古生物学會報告・紀事 新編
2685:
2681:
2630:
2626:
2597:
2593:
2538:
2529:
2516:
2509:
2470:
2466:
2405:
2396:
2351:
2347:
2305:
2301:
2285:
2279:
2275:
2270:
2258:
2015:perimineralized
1953:
1896:Mesodermochelys
1737:Mesodermochelys
1500:Mesodermochelys
1433:Mesodermochelys
1298:Mesodermochelys
1272:Mesodermochelys
1241:Mesodermochelys
1190:
1003:
922:
777:Phosphorosaurus
664:M. hobetsuensis
631:likely made by
574:Mesodermochelys
428:
423:
372:therizinosaurid
304:Late Cretaceous
264:
262:
261:
252:
250:
239:
100:
99:
94:
89:
84:
79:
74:
69:
64:
59:
54:
49:
44:
36:
35:
21:
12:
11:
5:
3933:
3923:
3922:
3917:
3912:
3907:
3902:
3897:
3892:
3887:
3882:
3877:
3872:
3867:
3862:
3857:
3855:Turonian Stage
3852:
3847:
3842:
3837:
3832:
3827:
3822:
3817:
3799:
3798:
3751:
3730:(9): 847–861.
3718:Stockeystrobus
3703:
3677:
3652:
3615:(5): 681–692.
3592:
3571:10.1086/721262
3565:(7): 576–586.
3542:
3490:
3471:(1): 138–145.
3451:
3401:
3380:(3): 122–129.
3357:
3346:www.app.pan.pl
3326:
3299:(2): 145–150.
3287:Nanaimoteuthis
3262:
3202:
3140:
3113:(2): 213–223.
3093:
3046:
2999:
2952:
2900:
2876:
2818:
2736:
2710:
2679:
2644:(8): 689–709.
2624:
2621:on 2011-08-26.
2591:
2527:
2507:
2480:(4): 421–425.
2464:
2394:
2345:
2316:(3): 365–390.
2299:
2272:
2271:
2269:
2266:
2265:
2264:
2257:
2254:
2251:
2250:
2248:
2241:
2239:
2232:
2227:
2219:
2218:
2216:
2209:
2206:
2195:
2190:
2187:Stockeystrobus
2182:
2181:
2179:
2172:
2169:permineralized
2165:
2154:
2149:
2141:
2140:
2138:
2131:
2129:
2123:
2118:
2110:
2109:
2107:
2100:
2093:
2087:
2082:
2074:
2073:
2071:
2061:
2054:permineralized
2050:
2047:
2042:
2034:
2033:
2031:
2018:
2011:
2000:
1995:
1987:
1986:
1983:
1980:
1975:
1972:
1969:
1965:
1964:
1952:
1949:
1946:
1945:
1942:
1941:
1939:
1932:
1926:
1923:
1918:
1910:
1909:
1907:
1900:
1891:
1888:
1883:
1875:
1874:
1872:
1865:
1863:
1856:
1851:
1843:
1842:
1840:
1833:
1831:
1824:
1818:
1817:
1815:
1808:
1806:
1799:
1794:
1786:
1785:
1783:
1776:
1774:
1767:
1762:
1754:
1753:
1751:
1745:abyssochrysoid
1741:
1732:
1729:
1720:
1712:
1711:
1709:
1702:
1700:
1697:
1691:
1683:
1682:
1680:
1673:
1667:
1660:
1654:
1653:
1651:
1644:
1642:
1631:
1625:
1624:
1622:
1615:
1612:
1605:
1600:
1597:Nanaimoteuthis
1592:
1591:
1589:
1582:
1579:
1572:
1570:I. teshioensis
1566:
1565:
1563:
1556:
1554:
1547:
1541:
1540:
1538:
1531:
1529:
1522:
1517:
1509:
1508:
1506:
1504:
1495:
1492:
1483:
1475:
1474:
1472:
1465:
1462:
1455:
1450:
1442:
1441:
1439:
1437:
1428:
1425:
1418:
1409:
1408:
1406:
1399:
1397:
1390:
1385:
1377:
1376:
1374:
1367:
1365:
1358:
1353:
1345:
1344:
1342:
1335:
1333:
1326:
1320:
1312:
1311:
1309:
1302:
1293:
1290:
1288:
1281:
1280:
1278:
1276:
1267:
1264:
1263:Unidentified.
1261:
1255:
1254:
1252:
1245:
1236:
1233:
1231:
1224:
1223:
1220:
1217:
1212:
1209:
1206:
1202:
1201:
1189:
1186:
1183:
1182:
1180:
1178:
1175:
1169:
1163:
1155:
1154:
1152:
1145:
1142:
1131:
1125:
1117:
1116:
1114:
1107:
1104:
1093:
1086:
1077:
1076:
1074:
1067:
1064:
1053:
1046:
1037:
1036:
1033:
1030:
1025:
1022:
1019:
1015:
1014:
1002:
999:
996:
995:
993:
986:
983:
969:
964:
956:
955:
952:
949:
944:
941:
938:
934:
933:
921:
918:
915:
914:
912:
909:
906:
904:
903:Indeterminate
901:
895:
894:
885:
871:
868:
865:
860:
852:
851:
849:
837:
834:
824:
823:Indeterminate
821:
814:
813:
804:
794:
791:
785:
780:
772:
771:
762:
755:
748:
745:
740:
732:
731:
722:
715:
713:
707:
702:
694:
693:
684:
674:
672:
666:
661:
653:
652:
650:
640:
625:
622:
615:
614:
605:
595:
588:
582:
577:
569:
568:
559:
552:
545:
539:
534:
526:
525:
523:
516:
514:
503:
498:
490:
489:
487:
480:
478:
475:
470:
462:
461:
458:
455:
450:
447:
444:
440:
439:
427:
424:
422:
421:Fossil content
419:
274:
273:
248:
244:
243:
234:
230:
229:
225:
224:
215:
211:
210:
201:
197:
196:
192:
191:
188:
184:
183:
178:
174:
173:
162:Ishikari Group
159:
155:
154:
132:Saku Formation
117:
113:
112:
107:
103:
102:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
45:
40:
28:
27:
9:
6:
4:
3:
2:
3932:
3921:
3918:
3916:
3913:
3911:
3908:
3906:
3903:
3901:
3898:
3896:
3893:
3891:
3888:
3886:
3883:
3881:
3878:
3876:
3873:
3871:
3868:
3866:
3863:
3861:
3858:
3856:
3853:
3851:
3848:
3846:
3843:
3841:
3838:
3836:
3833:
3831:
3828:
3826:
3823:
3821:
3818:
3816:
3813:
3812:
3810:
3803:
3794:
3790:
3786:
3782:
3778:
3774:
3770:
3766:
3762:
3755:
3747:
3743:
3738:
3733:
3729:
3725:
3721:
3719:
3710:
3708:
3699:
3695:
3691:
3684:
3682:
3673:
3669:
3665:
3664:
3656:
3648:
3644:
3639:
3634:
3630:
3626:
3622:
3618:
3614:
3610:
3606:
3599:
3597:
3588:
3584:
3580:
3576:
3572:
3568:
3564:
3560:
3556:
3549:
3547:
3538:
3534:
3530:
3526:
3521:
3516:
3512:
3508:
3504:
3497:
3495:
3486:
3482:
3478:
3474:
3470:
3466:
3462:
3455:
3447:
3443:
3439:
3435:
3431:
3427:
3423:
3419:
3415:
3408:
3406:
3397:
3393:
3388:
3383:
3379:
3375:
3371:
3364:
3362:
3347:
3343:
3337:
3335:
3333:
3331:
3322:
3318:
3314:
3310:
3306:
3302:
3298:
3294:
3290:
3288:
3279:
3277:
3275:
3273:
3271:
3269:
3267:
3258:
3254:
3250:
3246:
3242:
3238:
3234:
3230:
3226:
3222:
3218:
3211:
3209:
3207:
3198:
3194:
3190:
3186:
3182:
3178:
3174:
3170:
3166:
3159:
3157:
3155:
3153:
3151:
3149:
3147:
3145:
3136:
3132:
3128:
3124:
3120:
3116:
3112:
3108:
3104:
3097:
3089:
3085:
3081:
3077:
3073:
3069:
3065:
3061:
3057:
3050:
3042:
3038:
3034:
3030:
3026:
3022:
3018:
3014:
3010:
3003:
2995:
2991:
2987:
2983:
2979:
2975:
2971:
2967:
2963:
2956:
2948:
2944:
2939:
2934:
2930:
2926:
2922:
2918:
2914:
2907:
2905:
2890:
2886:
2880:
2872:
2868:
2864:
2860:
2856:
2852:
2848:
2844:
2840:
2836:
2832:
2825:
2823:
2814:
2810:
2806:
2802:
2797:
2792:
2788:
2784:
2780:
2773:
2771:
2769:
2767:
2765:
2763:
2761:
2759:
2757:
2755:
2753:
2751:
2749:
2747:
2745:
2743:
2741:
2732:
2728:
2724:
2717:
2715:
2706:
2702:
2698:
2694:
2690:
2683:
2675:
2671:
2667:
2663:
2659:
2655:
2651:
2647:
2643:
2639:
2635:
2628:
2620:
2616:
2612:
2611:
2606:
2604:
2595:
2587:
2583:
2578:
2573:
2568:
2563:
2559:
2555:
2551:
2547:
2543:
2536:
2534:
2532:
2525:
2524:0-520-24209-2
2521:
2514:
2512:
2503:
2499:
2495:
2491:
2487:
2483:
2479:
2475:
2468:
2460:
2456:
2451:
2446:
2442:
2438:
2434:
2430:
2426:
2422:
2418:
2414:
2410:
2403:
2401:
2399:
2390:
2386:
2382:
2378:
2373:
2368:
2365:(1): 97–104.
2364:
2360:
2356:
2349:
2340:
2335:
2331:
2327:
2323:
2319:
2315:
2311:
2303:
2295:
2291:
2284:
2277:
2273:
2263:
2260:
2259:
2249:
2246:
2242:
2240:
2237:
2233:
2231:
2228:
2226:
2225:
2221:
2220:
2217:
2214:
2210:
2208:A seed cone.
2207:
2204:
2200:
2196:
2194:
2191:
2189:
2188:
2184:
2183:
2180:
2177:
2173:
2170:
2166:
2163:
2159:
2155:
2153:
2150:
2148:
2147:
2143:
2142:
2139:
2136:
2132:
2130:
2127:
2124:
2122:
2119:
2117:
2116:
2112:
2111:
2108:
2105:
2101:
2098:
2094:
2091:
2088:
2086:
2083:
2081:
2080:
2079:Mukawastrobus
2076:
2075:
2072:
2069:
2066:
2062:
2059:
2055:
2051:
2048:
2046:
2045:M. rothwellii
2043:
2041:
2040:
2036:
2035:
2032:
2029:
2028:
2023:
2019:
2016:
2012:
2009:
2005:
2001:
1999:
1996:
1994:
1993:
1989:
1988:
1984:
1981:
1979:
1976:
1973:
1970:
1967:
1966:
1963:
1961:
1956:
1944:
1943:
1940:
1937:
1934:A very large
1933:
1930:
1927:
1924:
1922:
1919:
1917:
1916:
1912:
1911:
1908:
1905:
1901:
1898:
1897:
1892:
1889:
1887:
1884:
1882:
1881:
1877:
1876:
1873:
1870:
1866:
1864:
1861:
1857:
1855:
1852:
1850:
1849:
1845:
1844:
1841:
1838:
1834:
1832:
1829:
1825:
1823:
1820:
1819:
1816:
1813:
1809:
1807:
1804:
1800:
1798:
1795:
1793:
1792:
1787:
1784:
1781:
1777:
1775:
1772:
1768:
1766:
1763:
1761:
1760:
1759:Rhytidoplites
1756:
1755:
1752:
1749:
1746:
1742:
1739:
1738:
1733:
1730:
1728:
1724:
1721:
1719:
1718:
1714:
1713:
1710:
1707:
1706:cirroctopodid
1703:
1701:
1698:
1695:
1692:
1690:
1689:
1685:
1684:
1681:
1678:
1674:
1671:
1668:
1665:
1661:
1659:
1656:
1655:
1652:
1649:
1645:
1643:
1640:
1636:
1632:
1630:
1627:
1626:
1623:
1620:
1616:
1613:
1610:
1606:
1604:
1601:
1599:
1598:
1593:
1590:
1587:
1583:
1580:
1577:
1573:
1571:
1568:
1567:
1564:
1561:
1557:
1555:
1552:
1548:
1546:
1543:
1542:
1539:
1536:
1532:
1530:
1527:
1523:
1521:
1518:
1516:
1515:
1510:
1507:
1505:
1502:
1501:
1496:
1493:
1491:
1487:
1484:
1482:
1481:
1477:
1476:
1473:
1470:
1466:
1463:
1460:
1456:
1454:
1451:
1449:
1448:
1447:Haboroteuthis
1444:
1443:
1440:
1438:
1435:
1434:
1429:
1426:
1423:
1419:
1417:
1416:
1411:
1410:
1407:
1404:
1400:
1398:
1395:
1391:
1389:
1386:
1384:
1383:
1379:
1378:
1375:
1372:
1368:
1366:
1363:
1359:
1357:
1354:
1352:
1351:
1347:
1346:
1343:
1340:
1336:
1334:
1331:
1327:
1324:
1321:
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972:Nakagawa Town
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551:(HMG-1219)".
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389:Nipponosaurus
385:
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379:, from Early
378:
377:
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352:Sorachi Group
349:
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3890:Danian Stage
3840:Albian Stage
3835:Aptian Stage
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3754:
3727:
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3377:
3373:
3349:. Retrieved
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3220:
3175:(1): 71–80.
3172:
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3110:
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3096:
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2838:
2834:
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2229:
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2152:O. kokubunii
2151:
2146:Obirafructus
2144:
2121:N. yezoensis
2120:
2113:
2084:
2077:
2044:
2039:Mikasapteris
2037:
2025:
1997:
1990:
1977:
1958:
1921:Y. giganteus
1920:
1913:
1894:
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1878:
1853:
1848:Tetragonites
1846:
1821:
1797:S. mihoensis
1796:
1789:
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1735:
1727:nakagawensis
1726:
1722:
1715:
1693:
1686:
1677:vampyromorph
1657:
1648:vampyromorph
1629:N. jeletzkyi
1628:
1619:vampyromorph
1602:
1595:
1569:
1544:
1519:
1512:
1498:
1490:yasukawensis
1489:
1485:
1478:
1452:
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1431:
1421:
1413:
1387:
1380:
1355:
1350:Colombiceras
1348:
1322:
1317:Cheloniceras
1315:
1296:
1270:
1239:
1214:
1195:
1165:
1160:Isselicrinus
1158:
1127:
1120:
1089:
1083:Balanocrinus
1081:
1049:
1041:
1027:
1008:
967:A. miyazakii
966:
959:
946:
927:
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855:
843:
818:Pliosauridae
782:
775:
743:P. japonicus
742:
735:
704:
697:
663:
656:
644:dermochelyid
618:
599:dermochelyid
580:M. undulatus
579:
572:
537:K. japonicus
536:
529:
500:
493:
472:
465:
452:
433:
413:of southern
401:
387:
374:
364:
310:to Earliest
279:
277:
222:conglomerate
3424:: 128–141.
3227:: 224–234.
3169:Zoosymposia
2972:(5): e106.
2733:: 69 to 76.
2419:(1): 7207.
2176:saxifragale
2065:polypodioid
1915:Yezoteuthis
1822:S. scalaris
1453:H. poseidon
1382:Gaudryceras
1010:Echinoderms
1001:Echinoderms
875:tylosaurine
798:halisaurine
678:mosasaurine
531:Kamuysaurus
501:C. keraorum
495:Chupkaornis
473:A. angulata
403:Kamuysaurus
336:bioturbated
3809:Categories
3700:(1): 1–21.
3351:2022-08-18
2923:: 105593.
2894:2022-08-15
2339:2115/17182
2268:References
1951:Paleoflora
1886:T. tanabei
1854:T. glabrus
1791:Scalarites
1765:R. adkinsi
1658:N. yokotai
1633:Hokkaido (
1603:N. hikidai
1514:Inoceramus
827:Cenomanian
658:Mosasaurus
332:turbiditic
280:Yezo Group
26:Yezo Group
18:Yeso Group
3793:0195-6671
3746:1916-2790
3672:249459457
3587:251086117
3579:1058-5893
3529:0002-9122
3485:0022-3360
3446:0195-6671
3396:130346354
3321:128429338
3313:1342-8144
3257:133625463
3249:0195-6671
3197:1178-9913
3135:247958614
3127:1342-8144
3088:129122259
3080:1342-8144
3041:0891-2963
2994:241798505
2986:2274-0422
2947:0195-6671
2871:130644927
2863:1477-2019
2805:0567-7920
2674:134930629
2666:1477-2019
2502:128744799
2494:1342-8144
2441:2045-2322
2389:128406537
2381:0567-7920
2236:Coniacian
2230:Z. bayeri
2213:sequoioid
2203:Santonian
2199:Coniacian
2162:Santonian
2158:Coniacian
2115:Nilssonia
2097:seed cone
2008:Santonian
2004:Coniacian
1974:Presence
1931:fossils.
1748:gastropod
1672:fossils.
1639:Campanian
1637:to lower
1635:Santonian
1609:Campanian
1551:Campanian
1526:Campanian
1459:Santonian
1356:C. spathi
1306:gastropod
1249:gastropod
1211:Presence
1172:Campanian
1139:Coniacian
1122:Isocrinus
1101:Campanian
1097:Coniacian
1061:Campanian
1057:Santonian
1024:Presence
961:Apsopelix
943:Presence
719:hadrosaur
639:remains.
629:boreholes
556:hadrosaur
511:Santonian
507:Coniacian
449:Presence
398:Santonian
381:Campanian
356:Ophiolite
320:Cape Sōya
312:Paleocene
208:sandstone
195:Lithology
187:Thickness
158:Underlies
116:Sub-units
3647:32686035
3537:27589935
2813:76651553
2586:31488887
2459:35504901
2256:See also
2085:M. satoi
2056:fertile
2017:fruits.
1978:Material
1936:oegopsid
1880:Thyasira
1869:ammonoid
1860:Turonian
1837:ammonoid
1828:Turonian
1812:ammonoid
1803:Turonian
1780:ammonite
1717:Provanna
1664:Turonian
1576:Turonian
1403:ammonoid
1394:Turonian
1371:ammonite
1339:ammonite
1259:Bivalvia
1215:Material
1197:Molluscs
1188:Molluscs
1135:Turonian
1028:Material
980:Turonian
947:Material
878:mosasaur
840:Pliosaur
831:Turonian
801:mosasaur
752:vertebra
750:Partial
710:Sakhalin
681:mosasaur
633:bivalves
549:mandible
453:Material
435:Reptiles
426:Reptiles
415:Hokkaido
306:in age (
296:Sakhalin
288:Hokkaido
241:Sakhalin
237:Hokkaido
228:Location
204:Mudstone
177:Overlies
172:deposits
3773:Bibcode
3638:7429551
3617:Bibcode
3426:Bibcode
3229:Bibcode
3021:Bibcode
2925:Bibcode
2843:Bibcode
2646:Bibcode
2577:6728324
2554:Bibcode
2450:9065154
2421:Bibcode
2318:Bibcode
2224:Zamites
2104:cypress
2058:pinnule
2022:cornale
1985:Images
1971:Species
1904:bivalve
1586:bivalve
1560:bivalve
1535:bivalve
1480:Hikidea
1469:teuthid
1415:Gyrodes
1222:Images
1208:Species
1149:crinoid
1111:crinoid
1071:crinoid
1035:Images
1021:Species
954:Images
940:Species
637:mollusc
592:humerus
460:Images
446:Species
316:Urakawa
247:Country
218:Tuffite
200:Primary
170:Neogene
3791:
3744:
3724:Botany
3670:
3645:
3635:
3585:
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2522:
2500:
2492:
2457:
2447:
2439:
2387:
2379:
1992:Eydeia
1960:Plants
1771:Aptian
1362:Aptian
1330:Aptian
1095:Upper
976:Mikasa
863:T. sp.
647:turtle
602:turtle
308:Aptian
300:Russia
271:Russia
268:
256:
233:Region
3583:S2CID
3392:S2CID
3317:S2CID
3253:S2CID
3131:S2CID
3084:S2CID
2990:S2CID
2867:S2CID
2809:S2CID
2670:S2CID
2498:S2CID
2385:S2CID
2286:(PDF)
2135:cycad
1982:Notes
1968:Genus
1219:Notes
1205:Genus
1032:Notes
1018:Genus
951:Notes
937:Genus
457:Notes
443:Genus
344:slope
292:Japan
282:is a
259:Japan
214:Other
3789:ISSN
3742:ISSN
3668:OCLC
3643:PMID
3575:ISSN
3533:PMID
3525:ISSN
3481:ISSN
3442:ISSN
3309:ISSN
3245:ISSN
3193:ISSN
3123:ISSN
3076:ISSN
3037:ISSN
2982:ISSN
2943:ISSN
2859:ISSN
2801:ISSN
2697:1996
2662:ISSN
2582:PMID
2520:ISBN
2490:ISSN
2455:PMID
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920:Fish
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334:and
294:and
278:The
106:Type
42:PreꞒ
3781:doi
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3633:PMC
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3567:doi
3563:183
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3185:hdl
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3115:doi
3068:doi
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2791:doi
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