294:
566:
115:
1203:
140:
2177:
519:
1213:
531:
953:
2027:
928:
604:
wash them out from the sediments it could simply roll up and be carried along. Enrollment protects the softer body parts below the exoskeleton, while the spherical shape offers the least resistance to wave action.
406:
is a large trilobite, reaching a length of 6 in (15 cm). The body is oblong-oval, about twice as long as it is wide, It had a strongly convex profile, giving it its distinctive globular appearance.
495:- that is, the pygidium is about the same size as the cephalon. The pygidium completely lacks any visible trilobation. It is usually semicircular in shape but can be pointed in some species like
554:
of its cephalon, is believed to have been an adaptation for burrowing. The presence of well-developed eyes also suggest that it may have kept them above the substrate by burrowing into
825:
because of the size, shape, and almost featureless cephalon. But he noted the almost absent trilobation of body and the difference in the number of segments in the thorax (10 in
2981:
819:
Murchison first believed that the specimens he discovered (including a large 5 in (13 cm) by 3.5 in (8.9 cm) specimen) belonged to the genus
3075:
3045:
414:(singular: tagma), which in turn are divided into three lobes - the central lobe (axial) and two lateral lobes (pleural). Aside from faint depressions in the
907:, roughly meaning "of Barr", comes from its common name among collectors. It was then known as the "Barr trilobite" referring to the plentiful occurrence of
351:
period. They were relatively large trilobites, reaching a length of 6 in (15 cm). They were distinctive for their highly globular, smooth-surfaced
3060:
2185:
1267:
596:
could also curl up (known as enrollment) into a ball-like shape. This is believed to indicate that its habitat might have been the shallow waters of the
3105:
2968:
1651:
3070:
2555:
2007:
1894:
1823:
1796:
1763:
1717:
1588:
1535:
1495:
1429:
1397:
1322:
1283:
1690:
3080:
2070:
1339:
3095:
3090:
3100:
2824:
2819:
2779:
2769:
2754:
2739:
2213:
449:
434:
3055:
966:
293:
3050:
2198:
355:. They possessed well-developed, large compound eyes and were believed to have dwelled in shallow-water sediments in life.
3065:
3040:
2764:
2208:
2203:
2193:
477:
2218:
2444:
1944:
565:
3085:
2590:
452:
of the cephalon - the edges where the lateral and rear margins of the cephalon meet - are rounded. The cephalon is
2804:
2774:
2759:
2701:
2419:
430:
139:
1289:
2463:
2162:
2063:
805:
2645:
2635:
2473:
2424:
1011:
900:
601:
508:
are large and peculiarly well-developed. This, along with the rounded contours of their body, suggests that
114:
2508:
2921:
2749:
2404:
1630:
2273:
1663:
3007:
2794:
2414:
2513:
2384:
2252:
877:
2615:
2577:
2518:
2493:
2468:
2031:
1477:
962:
932:
743:
497:
438:
2503:
1970:
3035:
2906:
2660:
2056:
1481:
1207:
797:
298:
260:
2453:
1999:
Catalogue of type, figured and cited fossils in the
National Museum of Wales: Supplement 1971-1994
1724:
2630:
2536:
2498:
2429:
2259:
1843:
788:
693:
266:
243:
134:
2369:
2298:
2244:
1813:
1578:
1485:
1387:
1354:
223:
3012:
2994:
2986:
2610:
2291:
2003:
1890:
1884:
1858:
1819:
1792:
1788:
1759:
1584:
1531:
1491:
1425:
1393:
1318:
1279:
1217:
558:
backward. They are situated in such a way that they provide the trilobite with a semicircular
2999:
422:
is unusual in that the three lobes are barely discernible from each other. The axial lobe of
2409:
2326:
977:
885:
382:
344:
1235:
869:
2693:
2625:
2439:
2305:
2096:
984:
755:
747:
646:
559:
411:
389:
2959:
2665:
2640:
2567:
2488:
2478:
2458:
2319:
2266:
957:
866:
839:, but ultimately classified it as a new genus based on the extremely advanced state of
705:
673:
314:
3029:
2655:
2650:
2600:
2595:
2483:
2434:
2144:
2114:
1886:
The Medals of
Creation: Or, First Lessons in Geology and the Study of Organic Remains
1781:
1353:. Ohio Department of Natural Resources, Division of Geological Survey. Archived from
991:
987:
916:
809:
802:
739:
732:
709:
639:
612:
597:
468:
442:
392:
366:
362:
334:
306:
197:
72:
927:
616:
2721:
2620:
2549:
2528:
2448:
2396:
1212:
792:
650:
586:
518:
505:
252:
2176:
2039:
1911:
1997:
1928:
1753:
1634:
1525:
1449:
1419:
1312:
515:
The surface of the exoskeleton of most species is studded with minute punctures.
410:
Like all trilobites, the body is divided into three functional segments known as
17:
2953:
2124:
1718:"Systematic Relationships and Chronological Extent of the nine Trilobite Orders"
620:
352:
47:
530:
2716:
2605:
2585:
2561:
1490:. Dover books on animals. Courier Dover Publications. pp. 198, 201, 210.
980:
912:
736:
685:
385:
341:
210:
92:
57:
1862:
512:
may have spent most of its time buried in sediment with its eyes protruding.
2891:
2886:
2881:
2876:
2871:
2866:
2861:
2853:
2834:
2829:
2744:
2731:
2684:
2675:
2134:
2119:
2104:
2087:
2079:
952:
941:
937:
840:
784:
762:
716:
681:
665:
624:
623:, feeding on decomposing organic material drifting down in the currents, or
555:
551:
457:
453:
378:
337:
184:
171:
151:
97:
2944:
1605:
2026:
850:
The genus is so named because of its curious resemblance to a large round
2938:
2839:
2814:
2809:
2799:
2789:
2784:
2711:
2542:
2362:
2344:
2312:
2139:
2109:
1779:
Arthur Clive Bishop; Alan Robert
Woolley; William Roger Hamilton (1999).
1552:
945:
893:
835:
821:
781:
582:
570:
492:
488:
481:
462:
348:
303:
123:
87:
82:
67:
62:
52:
2973:
2129:
1003:
813:
766:
701:
677:
327:
275:
102:
77:
653:
of the Late
Silurian period (approximately 478.6 ± 1.7 to 418.7 ± 2.8
2706:
2228:
889:
751:
720:
697:
689:
669:
658:
643:
415:
370:
310:
161:
2915:
2154:
951:
926:
862:
855:
851:
728:
724:
654:
564:
529:
330:
292:
888:
during
Murchison's time, being a word encountered in book two of
1930:
Opera, or, The works of Virgil: with copious notes, mythological
539:
446:
374:
2919:
2052:
1268:"A compendium of fossil marine animal genera (Trilobita entry)"
437:(the divisions by which the cephalon splits when the trilobite
2043:
2048:
1028:- Estonia, Kazakhstan, Ukraine, United Kingdom, United States
833:). He also recognized its close relationship with the genus
445:, with the suture ending along the hind cephalic margin. The
1636:
Handbook of geological terms, geology and physical geography
1530:(2 ed.). Cambridge University Press. pp. 151–152.
517:
1580:
The
Paleozoic Era: Diversification of Plant and Animal Life
562:
on each side, keeping them aware of movements near them.
1421:
Colossal cataract: the geologic history of
Niagara Falls
715:
They can also be found in the
Ordovician formations of
426:
is also very broad in comparison to the pleural lobes.
480:(the central lobe of the head) is almost fused to the
433:(head segment) is very large and strongly convex. The
1723:. A Guide to the Orders of Trilobites. Archived from
1652:"Trilobites of Iowa and some Related Paleozoic Forms"
1913:
The history of the arts and sciences of the ancients
1084:- Canada, United States (Synonym (biology)|synonym?:
983:
by P.A. Jell and J.M. Adrain in 2003, and under the
2928:
2852:
2730:
2692:
2683:
2674:
2576:
2527:
2395:
2379:
2354:
2336:
2283:
2236:
2227:
2184:
2153:
2095:
2086:
1314:
Academic Press dictionary of science and technology
1812:Wen-tang Zhang; Pei-ji Chen; A. R. Palmer (2003).
1780:
664:Specimens have been recorded from the Silurian of
581:were believed to have burrowed backwards into the
534:Side and ventral views of an enrolled specimen of
1062:Bumastus cuniculus|Bumastus cuniculus vieillensis
1014:. The list is incomplete and may be inaccurate.
727:, the Czech Republic, the Russian Federation,
2064:
1487:The fossil book: a record of prehistoric life
1317:. Gulf Professional Publishing. p. 325.
1278:. Paleontological Research Institution: 560.
491:(the tail) is smooth and very rounded. It is
487:The thorax has ten narrow segments while the
8:
1418:Irving H. Tesmer; Jerold C. Bastedo (1981).
1583:. The Rosen Publishing Group. p. 119.
2916:
2689:
2680:
2233:
2092:
2071:
2057:
2049:
1977:. Global Biodiversity Information Facility
1685:
1683:
1681:
1577:Britannica Educational Publishing (2010).
1261:
1259:
1257:
113:
31:
2002:. National Museum Wales. pp. 44–45.
1747:
1745:
1662:. Iowa Geiological Survey. Archived from
1572:
1570:
1392:. Harvard University Press. p. 143.
884:- breasts). The word was familiar in the
1844:"Available generic names for trilobites"
1413:
1411:
1409:
1381:
1379:
1377:
1375:
1837:
1835:
1716:Samuel M. Gon III & Enrico Bonino.
1625:
1623:
1604:Samuel M. Gon III (November 12, 2009).
1551:Samuel M. Gon III (November 12, 2009).
1519:
1517:
1515:
1513:
1511:
1509:
1507:
1443:
1441:
1386:Paul D. Taylor; David N. Lewis (2007).
1227:
1787:. Cambridge University Press. p.
1471:
1469:
649:of the Early Ordovician period to the
472:, though not as pronounced as that of
1639:. W. Blackwood and sons. p. 121.
1608:. A Guide to the Orders of Trilobites
1555:. A Guide to the Orders of Trilobites
765:, though they are sometimes found in
735:; with specific occurrences from the
7:
3076:Silurian trilobites of North America
3046:Silurian trilobites of South America
1842:P.A. Jell & J.M. Adrain (2002).
1783:Guide to minerals, rocks and fossils
1656:Iowa Geological Survey Annual Report
1010:and the countries of their recorded
619:) trilobite. It was probably either
585:, leaving only their well-developed
456:(smooth and mostly featureless), an
2044:A Guide to the Orders of Trilobites
865:of a cow), which in turn came from
3061:Early Ordovician first appearances
1272:Bulletins of American Paleontology
1154:- Estonia, Ukraine, United Kingdom
25:
2556:Permian–Triassic extinction event
1951:. Louisville Fossils. 2 June 2010
1448:Roderick Impey Murchison (1839).
550:, as well as the almost complete
43:Early Ordovician to Late Silurian
3106:Taxa named by Roderick Murchison
2175:
2025:
1851:Memoirs of the Queensland Museum
1211:
1201:
861:(large grapes that resemble the
381:. They are classified under the
138:
1818:. Elsevier. pp. 198, 221.
1112:- United Kingdom, United States
967:Field Museum of Natural History
911:in the limestone formations of
1927:Joab Goldsmith Cooper (1866).
1454:. Vol. Part II. J. Murray
1311:Christopher G. Morris (1992).
1:
3071:Silurian trilobites of Europe
1996:Robert Maurice Owens (1995).
1650:Otto Theodore Walter (1924).
1527:The elements of palaeontology
1484:; Thomas Hewitt Rich (1989).
340:which existed from the Early
789:Sir Roderick Impey Murchison
761:They are typically found in
758:stage of the United States.
546:The rounded smooth shape of
284:
3081:Silurian trilobites of Asia
1889:. H. G. Bohn. p. 537.
780:was first described by the
361:fossils have been found in
27:Extinct genus of trilobites
3122:
1971:"Classification of Genus:
1883:Gideon A. Mantell (1854).
1553:"Trilobite Facial Sutures"
1338:Douglas L. Shrake (2005).
573:of several individuals of
3096:Paleozoic life of Nunavut
3091:Paleozoic life of Ontario
2904:
2420:Charles Doolittle Walcott
2267:Profallotaspis jakutensis
2173:
1755:Silurian reefs of Gotland
1242:. Encyclopædia Britannica
1158:Bumastus springfieldensis
1046:- Czech Republic, Ukraine
281:
274:
258:
251:
135:Scientific classification
133:
121:
112:
34:
3101:Paleozoic life of Quebec
2397:Notable trilobitologists
1857:(2). Queensland Museum.
1815:Biostratigraphy of China
976:is classified under the
661:can be found worldwide.
2591:Beecher's Trilobite Bed
2464:George Frederic Matthew
2425:Charles Emerson Beecher
1910:Charles Rollin (1829).
1697:. Paleobiology Database
1524:Rhona M. Black (1988).
1266:J. J. Sepkoski (2002).
1208:Paleontology portal
1148:- Canada, United States
1104:Bumastus indeterminatus
801:was recovered from the
571:artist's reconstruction
124:artist's reconstruction
3056:Wenlock series fossils
2636:Silica Shale Formation
2474:Brian D. E. Chatterton
2405:Alexander von Humboldt
1182:Bumastus transversalis
970:
949:
590:
543:
522:
318:
3051:Ordovician trilobites
3008:Paleobiology Database
2509:Gerhard K. B. Alberti
2415:Alfred Russel Wallace
1916:. Blackie, Fullarton.
1752:A. A. Manten (1971).
1218:Arthropods portal
1188:Bumastus trentonensis
1170:Bumastus tenuirugosus
1146:Bumastus orbicaudatus
1092:Bumastus graftonensis
1050:Bumastus chicagoensis
1002:Listed below are the
955:
944:, has a more pointed
930:
903:of the type species,
568:
533:
521:
296:
3066:Silurian extinctions
3041:Corynexochida genera
2586:Anti-Atlas Mountains
2578:Notable fossil sites
2519:Johan Wilhelm Dalman
2494:Gregory D. Edgecombe
2469:Harry B. Whittington
2036:at Wikimedia Commons
1947:Bumastus niagarensis
1478:Mildred Adams Fenton
1389:Fossil Invertebrates
1292:on September 5, 2006
1140:Bumastus niagarensis
963:Middleport, New York
933:Bumastus niagarensis
2907:Category:Trilobites
2646:Walcott–Rust quarry
2274:Serrania gordaensis
2040:Order Corynexochida
1933:. Sheldon & co.
1482:Carroll Lane Fenton
1451:The Silurian System
1026:Bumastus barriensis
843:in the cephalon of
798:Bumastus barriensis
638:existed during the
299:Bumastus barriensis
261:Bumastus barriensis
2631:Maotianshan Shales
2537:Cambrian explosion
2499:Bruce S. Lieberman
2430:Roderick Murchison
2163:List of trilobites
1730:on August 23, 2011
1693:Bumastus Murchison
1666:on October 6, 2011
1476:Pat Vickers Rich;
1056:Bumastus cuniculus
1044:Bumastus bouchardi
1038:Bumastus bellmanni
971:
950:
750:age) of China and
694:Russian Federation
591:
577:in shallow water.
544:
523:
458:evolutionary trend
319:
3086:Bromide Formation
3023:
3022:
2995:Open Tree of Life
2922:Taxon identifiers
2913:
2912:
2900:
2899:
2848:
2847:
2514:Teiichi Kobayashi
2391:
2390:
2171:
2170:
2030:Media related to
2009:978-0-7200-0422-9
1896:978-0-405-12718-2
1825:978-7-03-011314-6
1798:978-0-521-77881-7
1765:978-0-444-40706-1
1695:1839 (trilobite)"
1590:978-1-61530-196-6
1537:978-0-521-34836-2
1497:978-0-486-29371-4
1431:978-0-87395-522-5
1399:978-0-674-02574-5
1340:"Ohio Trilobites"
1324:978-0-12-200400-1
1285:978-0-87710-450-6
1164:Bumastus sulcatus
1128:Bumastus limbatus
1110:Bumastus insignis
1086:Illaenus globosus
1082:Bumastus globosus
1076:Bumastus erastusi
1006:classified under
990:of trilobites by
655:million years ago
291:
290:
247:
18:Bumastus insignis
16:(Redirected from
3113:
3016:
3015:
3003:
3002:
2990:
2989:
2977:
2976:
2964:
2963:
2962:
2949:
2948:
2947:
2917:
2690:
2681:
2606:Gees, Gerolstein
2410:Joachim Barrande
2385:Acanthopluerella
2327:Pseudophillipsia
2253:Hupetina antiqua
2234:
2179:
2093:
2073:
2066:
2059:
2050:
2029:
2014:
2013:
1993:
1987:
1986:
1984:
1982:
1967:
1961:
1960:
1958:
1956:
1941:
1935:
1934:
1924:
1918:
1917:
1907:
1901:
1900:
1880:
1874:
1873:
1871:
1869:
1848:
1839:
1830:
1829:
1809:
1803:
1802:
1786:
1776:
1770:
1769:
1749:
1740:
1739:
1737:
1735:
1729:
1722:
1713:
1707:
1706:
1704:
1702:
1687:
1676:
1675:
1673:
1671:
1647:
1641:
1640:
1627:
1618:
1617:
1615:
1613:
1601:
1595:
1594:
1574:
1565:
1564:
1562:
1560:
1548:
1542:
1541:
1521:
1502:
1501:
1473:
1464:
1463:
1461:
1459:
1445:
1436:
1435:
1415:
1404:
1403:
1383:
1370:
1369:
1367:
1365:
1359:
1344:
1335:
1329:
1328:
1308:
1302:
1301:
1299:
1297:
1288:. Archived from
1263:
1252:
1251:
1249:
1247:
1232:
1216:
1215:
1206:
1205:
1204:
1134:Bumastus milleri
1100:- Czech Republic
1058:- United States
1032:Bumastus beckeri
1020:Bumastus armatus
886:English language
854:. It comes from
536:Bumastus beckeri
242:
235:
222:
209:
196:
183:
143:
142:
117:
107:
44:
40:Temporal range:
32:
21:
3121:
3120:
3116:
3115:
3114:
3112:
3111:
3110:
3026:
3025:
3024:
3019:
3011:
3006:
2998:
2993:
2985:
2980:
2972:
2967:
2958:
2957:
2952:
2943:
2942:
2937:
2924:
2914:
2909:
2896:
2872:Internal organs
2867:Digestive tract
2854:Soft body parts
2844:
2726:
2670:
2626:Llandeilo Group
2616:Jince Formation
2572:
2523:
2440:Rudolf Kaufmann
2387:
2375:
2350:
2337:First described
2332:
2306:Carniphillipsia
2279:
2229:Notable fossils
2223:
2180:
2167:
2149:
2082:
2077:
2022:
2017:
2010:
1995:
1994:
1990:
1980:
1978:
1969:
1968:
1964:
1954:
1952:
1943:
1942:
1938:
1926:
1925:
1921:
1909:
1908:
1904:
1897:
1882:
1881:
1877:
1867:
1865:
1846:
1841:
1840:
1833:
1826:
1811:
1810:
1806:
1799:
1778:
1777:
1773:
1766:
1751:
1750:
1743:
1733:
1731:
1727:
1720:
1715:
1714:
1710:
1700:
1698:
1689:
1688:
1679:
1669:
1667:
1649:
1648:
1644:
1629:
1628:
1621:
1611:
1609:
1603:
1602:
1598:
1591:
1576:
1575:
1568:
1558:
1556:
1550:
1549:
1545:
1538:
1523:
1522:
1505:
1498:
1475:
1474:
1467:
1457:
1455:
1447:
1446:
1439:
1432:
1417:
1416:
1407:
1400:
1385:
1384:
1373:
1363:
1361:
1357:
1342:
1337:
1336:
1332:
1325:
1310:
1309:
1305:
1295:
1293:
1286:
1265:
1264:
1255:
1245:
1243:
1234:
1233:
1229:
1225:
1210:
1202:
1200:
1198:
1193:
1190:- United States
1184:- United States
1178:- United States
1176:Bumastus tenuis
1160:- United States
1142:- United States
1136:- United States
1130:- United States
1118:- United States
1098:Bumastus hornyi
1094:- United States
1072:- United States
1052:- United States
1034:- United States
1022:- United States
1012:type localities
1000:
925:
775:
633:
613:bottom-dwelling
560:field of vision
528:
401:
270:
264:
241:
233:
220:
207:
194:
181:
137:
108:
106:
105:
100:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
42:
41:
38:
28:
23:
22:
15:
12:
11:
5:
3119:
3117:
3109:
3108:
3103:
3098:
3093:
3088:
3083:
3078:
3073:
3068:
3063:
3058:
3053:
3048:
3043:
3038:
3028:
3027:
3021:
3020:
3018:
3017:
3004:
2991:
2978:
2965:
2950:
2934:
2932:
2926:
2925:
2920:
2911:
2910:
2905:
2902:
2901:
2898:
2897:
2895:
2894:
2889:
2884:
2879:
2874:
2869:
2864:
2858:
2856:
2850:
2849:
2846:
2845:
2843:
2842:
2837:
2832:
2827:
2822:
2817:
2812:
2807:
2802:
2797:
2792:
2787:
2782:
2777:
2772:
2767:
2762:
2757:
2755:Facial sutures
2752:
2747:
2742:
2736:
2734:
2728:
2727:
2725:
2724:
2719:
2714:
2709:
2704:
2698:
2696:
2687:
2678:
2672:
2671:
2669:
2668:
2663:
2658:
2653:
2648:
2643:
2641:Takaka Terrane
2638:
2633:
2628:
2623:
2618:
2613:
2611:Hunsrück Slate
2608:
2603:
2598:
2593:
2588:
2582:
2580:
2574:
2573:
2571:
2570:
2568:Trilobite zone
2565:
2558:
2553:
2546:
2539:
2533:
2531:
2525:
2524:
2522:
2521:
2516:
2511:
2506:
2504:Gerald J. Kloc
2501:
2496:
2491:
2489:Franco Rasetti
2486:
2481:
2479:Richard Fortey
2476:
2471:
2466:
2461:
2459:Niles Eldredge
2456:
2451:
2445:Rudolf Richter
2442:
2437:
2432:
2427:
2422:
2417:
2412:
2407:
2401:
2399:
2393:
2392:
2389:
2388:
2383:
2381:
2377:
2376:
2374:
2373:
2366:
2358:
2356:
2352:
2351:
2349:
2348:
2340:
2338:
2334:
2333:
2331:
2330:
2323:
2320:Paraphillipsia
2316:
2309:
2302:
2295:
2287:
2285:
2281:
2280:
2278:
2277:
2270:
2263:
2256:
2249:
2240:
2238:
2231:
2225:
2224:
2222:
2221:
2216:
2211:
2206:
2201:
2196:
2190:
2188:
2182:
2181:
2174:
2172:
2169:
2168:
2166:
2165:
2159:
2157:
2151:
2150:
2148:
2147:
2142:
2137:
2132:
2127:
2122:
2117:
2112:
2107:
2101:
2099:
2090:
2084:
2083:
2078:
2076:
2075:
2068:
2061:
2053:
2047:
2046:
2037:
2021:
2020:External links
2018:
2016:
2015:
2008:
1988:
1962:
1936:
1919:
1902:
1895:
1875:
1831:
1824:
1804:
1797:
1771:
1764:
1741:
1708:
1677:
1642:
1619:
1606:"The Pygidium"
1596:
1589:
1566:
1543:
1536:
1503:
1496:
1465:
1437:
1430:
1424:. SUNY Press.
1405:
1398:
1371:
1330:
1323:
1303:
1284:
1253:
1226:
1224:
1221:
1197:
1194:
1192:
1191:
1185:
1179:
1173:
1167:
1161:
1155:
1152:Bumastus phrix
1149:
1143:
1137:
1131:
1125:
1122:Bumastus lenzi
1119:
1116:Bumastus ioxus
1113:
1107:
1101:
1095:
1089:
1079:
1073:
1067:
1066:
1065:
1053:
1047:
1041:
1035:
1029:
1023:
1016:
999:
996:
958:Bumastus ioxus
924:
921:
774:
771:
763:reef limestone
706:United Kingdom
674:Czech Republic
632:
629:
527:
524:
498:B. niagarensis
435:facial sutures
400:
397:
315:Worcestershire
307:Wenlock series
289:
288:
279:
278:
272:
271:
265:
256:
255:
249:
248:
231:
227:
226:
218:
214:
213:
205:
201:
200:
192:
188:
187:
179:
175:
174:
169:
165:
164:
159:
155:
154:
149:
145:
144:
131:
130:
119:
118:
110:
109:
101:
96:
91:
86:
81:
76:
71:
66:
61:
56:
51:
46:
45:
39:
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
3118:
3107:
3104:
3102:
3099:
3097:
3094:
3092:
3089:
3087:
3084:
3082:
3079:
3077:
3074:
3072:
3069:
3067:
3064:
3062:
3059:
3057:
3054:
3052:
3049:
3047:
3044:
3042:
3039:
3037:
3034:
3033:
3031:
3014:
3009:
3005:
3001:
2996:
2992:
2988:
2983:
2979:
2975:
2970:
2966:
2961:
2955:
2951:
2946:
2940:
2936:
2935:
2933:
2931:
2927:
2923:
2918:
2908:
2903:
2893:
2890:
2888:
2885:
2883:
2880:
2878:
2875:
2873:
2870:
2868:
2865:
2863:
2860:
2859:
2857:
2855:
2851:
2841:
2838:
2836:
2833:
2831:
2828:
2826:
2823:
2821:
2820:Opisthoparian
2818:
2816:
2813:
2811:
2808:
2806:
2803:
2801:
2798:
2796:
2793:
2791:
2788:
2786:
2783:
2781:
2778:
2776:
2773:
2771:
2768:
2766:
2763:
2761:
2758:
2756:
2753:
2751:
2748:
2746:
2743:
2741:
2738:
2737:
2735:
2733:
2729:
2723:
2720:
2718:
2715:
2713:
2710:
2708:
2705:
2703:
2700:
2699:
2697:
2695:
2691:
2688:
2686:
2682:
2679:
2677:
2673:
2667:
2664:
2662:
2661:Wolchov River
2659:
2657:
2656:Wheeler Shale
2654:
2652:
2651:Wenlock Group
2649:
2647:
2644:
2642:
2639:
2637:
2634:
2632:
2629:
2627:
2624:
2622:
2619:
2617:
2614:
2612:
2609:
2607:
2604:
2602:
2601:Emu Bay Shale
2599:
2597:
2596:Burgess Shale
2594:
2592:
2589:
2587:
2584:
2583:
2581:
2579:
2575:
2569:
2566:
2564:
2563:
2559:
2557:
2554:
2552:
2551:
2547:
2545:
2544:
2540:
2538:
2535:
2534:
2532:
2530:
2526:
2520:
2517:
2515:
2512:
2510:
2507:
2505:
2502:
2500:
2497:
2495:
2492:
2490:
2487:
2485:
2484:Euan Clarkson
2482:
2480:
2477:
2475:
2472:
2470:
2467:
2465:
2462:
2460:
2457:
2455:
2452:
2450:
2446:
2443:
2441:
2438:
2436:
2435:Adam Sedgwick
2433:
2431:
2428:
2426:
2423:
2421:
2418:
2416:
2413:
2411:
2408:
2406:
2403:
2402:
2400:
2398:
2394:
2386:
2382:
2378:
2372:
2371:
2367:
2365:
2364:
2360:
2359:
2357:
2353:
2347:
2346:
2342:
2341:
2339:
2335:
2329:
2328:
2324:
2322:
2321:
2317:
2315:
2314:
2310:
2308:
2307:
2303:
2301:
2300:
2296:
2294:
2293:
2289:
2288:
2286:
2282:
2276:
2275:
2271:
2269:
2268:
2264:
2262:
2261:
2257:
2255:
2254:
2250:
2248:
2246:
2242:
2241:
2239:
2235:
2232:
2230:
2226:
2220:
2217:
2215:
2214:Carboniferous
2212:
2210:
2207:
2205:
2202:
2200:
2197:
2195:
2192:
2191:
2189:
2187:
2186:Geochronology
2183:
2178:
2164:
2161:
2160:
2158:
2156:
2152:
2146:
2145:Ptychopariida
2143:
2141:
2138:
2136:
2133:
2131:
2128:
2126:
2123:
2121:
2118:
2116:
2115:Corynexochida
2113:
2111:
2108:
2106:
2103:
2102:
2100:
2098:
2094:
2091:
2089:
2085:
2081:
2074:
2069:
2067:
2062:
2060:
2055:
2054:
2051:
2045:
2041:
2038:
2035:
2034:
2028:
2024:
2023:
2019:
2011:
2005:
2001:
2000:
1992:
1989:
1976:
1974:
1966:
1963:
1950:
1948:
1940:
1937:
1932:
1931:
1923:
1920:
1915:
1914:
1906:
1903:
1898:
1892:
1888:
1887:
1879:
1876:
1864:
1860:
1856:
1852:
1845:
1838:
1836:
1832:
1827:
1821:
1817:
1816:
1808:
1805:
1800:
1794:
1790:
1785:
1784:
1775:
1772:
1767:
1761:
1757:
1756:
1748:
1746:
1742:
1726:
1719:
1712:
1709:
1696:
1694:
1686:
1684:
1682:
1678:
1665:
1661:
1657:
1653:
1646:
1643:
1638:
1637:
1632:
1626:
1624:
1620:
1607:
1600:
1597:
1592:
1586:
1582:
1581:
1573:
1571:
1567:
1554:
1547:
1544:
1539:
1533:
1529:
1528:
1520:
1518:
1516:
1514:
1512:
1510:
1508:
1504:
1499:
1493:
1489:
1488:
1483:
1479:
1472:
1470:
1466:
1453:
1452:
1444:
1442:
1438:
1433:
1427:
1423:
1422:
1414:
1412:
1410:
1406:
1401:
1395:
1391:
1390:
1382:
1380:
1378:
1376:
1372:
1360:on 2011-06-28
1356:
1352:
1348:
1341:
1334:
1331:
1326:
1320:
1316:
1315:
1307:
1304:
1291:
1287:
1281:
1277:
1273:
1269:
1262:
1260:
1258:
1254:
1241:
1239:
1231:
1228:
1222:
1220:
1219:
1214:
1209:
1195:
1189:
1186:
1183:
1180:
1177:
1174:
1171:
1168:
1165:
1162:
1159:
1156:
1153:
1150:
1147:
1144:
1141:
1138:
1135:
1132:
1129:
1126:
1123:
1120:
1117:
1114:
1111:
1108:
1105:
1102:
1099:
1096:
1093:
1090:
1087:
1083:
1080:
1077:
1074:
1071:
1070:Bumastus dayi
1068:
1063:
1060:
1059:
1057:
1054:
1051:
1048:
1045:
1042:
1039:
1036:
1033:
1030:
1027:
1024:
1021:
1018:
1017:
1015:
1013:
1009:
1005:
997:
995:
993:
992:Jack Sepkoski
989:
988:Corynexochida
986:
982:
979:
975:
968:
964:
960:
959:
954:
947:
943:
939:
935:
934:
929:
922:
920:
918:
917:Staffordshire
914:
910:
909:B. barriensis
906:
902:
901:specific name
897:
895:
891:
887:
883:
879:
875:
871:
868:
864:
860:
857:
853:
848:
846:
842:
838:
837:
832:
828:
827:B. barriensis
824:
823:
817:
815:
811:
810:Wenlock Group
807:
804:
803:Coalbrookdale
800:
799:
794:
791:in 1839. The
790:
786:
783:
779:
772:
770:
768:
764:
759:
757:
753:
749:
745:
741:
738:
734:
733:United States
730:
726:
722:
718:
713:
711:
710:United States
707:
703:
699:
695:
691:
687:
683:
679:
675:
671:
667:
662:
660:
656:
652:
648:
645:
641:
640:Paleozoic era
637:
630:
628:
626:
622:
621:detritivorous
618:
614:
610:
606:
603:
599:
598:Littoral zone
595:
588:
587:compound eyes
584:
580:
576:
572:
567:
563:
561:
557:
553:
549:
541:
537:
532:
525:
520:
516:
513:
511:
507:
506:compound eyes
502:
500:
499:
494:
490:
485:
483:
479:
475:
471:
470:
465:
464:
460:also seen in
459:
455:
451:
448:
444:
443:opisthoparian
440:
436:
432:
427:
425:
421:
417:
413:
408:
405:
398:
396:
394:
393:Corynexochida
391:
387:
384:
380:
376:
372:
368:
367:South America
364:
360:
356:
354:
350:
346:
343:
339:
336:
332:
329:
325:
324:
316:
312:
308:
305:
301:
300:
295:
287:
286:
280:
277:
273:
268:
263:
262:
257:
254:
250:
245:
240:
239:
232:
229:
228:
225:
219:
216:
215:
212:
206:
203:
202:
199:
198:Corynexochida
193:
190:
189:
186:
180:
177:
176:
173:
170:
167:
166:
163:
160:
157:
156:
153:
150:
147:
146:
141:
136:
132:
129:
125:
120:
116:
111:
104:
99:
94:
89:
84:
79:
74:
69:
64:
59:
54:
49:
37:
33:
30:
19:
2929:
2892:Sensory pits
2840:Subisopygous
2785:Heteronomous
2780:Gonatoparian
2722:Pleural lobe
2621:Latham Shale
2560:
2550:Diplichnites
2548:
2541:
2529:Paleobiology
2454:Martin Basse
2449:Emma Richter
2368:
2361:
2343:
2325:
2318:
2311:
2304:
2297:
2290:
2272:
2265:
2258:
2251:
2243:
2032:
1998:
1991:
1979:. Retrieved
1972:
1965:
1953:. Retrieved
1946:
1939:
1929:
1922:
1912:
1905:
1885:
1878:
1866:. Retrieved
1854:
1850:
1814:
1807:
1782:
1774:
1758:. Elsevier.
1754:
1732:. Retrieved
1725:the original
1711:
1699:. Retrieved
1692:
1668:. Retrieved
1664:the original
1659:
1655:
1645:
1635:
1610:. Retrieved
1599:
1579:
1557:. Retrieved
1546:
1526:
1486:
1456:. Retrieved
1450:
1420:
1388:
1362:. Retrieved
1355:the original
1350:
1346:
1333:
1313:
1306:
1294:. Retrieved
1290:the original
1275:
1271:
1244:. Retrieved
1237:
1230:
1199:
1187:
1181:
1175:
1169:
1163:
1157:
1151:
1145:
1139:
1133:
1127:
1121:
1115:
1109:
1103:
1097:
1091:
1085:
1081:
1075:
1069:
1061:
1055:
1049:
1043:
1037:
1031:
1025:
1019:
1007:
1001:
973:
972:
956:
931:
908:
904:
898:
881:
873:
858:
849:
844:
834:
830:
826:
820:
818:
796:
793:type species
777:
776:
760:
756:Whiterockian
714:
663:
651:Ludlow epoch
635:
634:
617:nektobenthic
608:
607:
593:
592:
578:
574:
547:
545:
535:
526:Paleoecology
514:
509:
503:
496:
486:
473:
467:
461:
428:
423:
419:
409:
403:
402:
358:
357:
347:to the Late
335:corynexochid
322:
321:
320:
297:
282:
259:
253:Type species
237:
236:
127:
35:
29:
2954:Wikispecies
2877:Musculature
2815:Micropygous
2810:Macropygous
2770:Genal angle
2732:Terminology
2685:Exoskeleton
2666:Wren's Nest
2260:Lunagraulos
2125:Redlichiida
1040:- Argentina
876:- cow) and
769:limestone.
737:Dobrotivian
642:, from the
625:carnivorous
504:The smooth
399:Description
353:exoskeleton
309:, found at
302:, from the
217:Subfamily:
3036:Styginidae
3030:Categories
2862:Appendages
2790:Homonomous
2750:Enrollment
2745:Effacement
2717:Axial lobe
2676:Morphology
2562:Rusophycus
2370:Hungioides
2299:Cheiropyge
2245:Fritzapsis
2199:Ordovician
2080:Trilobites
1949:Trilobite"
1631:David Page
1223:References
981:Styginidae
913:Great Barr
905:barriensis
841:effacement
754:, and the
708:, and the
686:Kazakhstan
631:Occurrence
552:effacement
386:Styginidae
342:Ordovician
338:trilobites
224:Bumastinae
211:Styginidae
172:Arthropoda
2835:Spinosity
2825:Proparian
2805:Librigena
2800:Isopygous
2795:Hypostome
2740:Cranidium
2135:Phacopida
2120:Harpetida
2105:Agnostida
1981:April 12,
1955:April 12,
1868:April 12,
1863:0079-8835
1734:April 12,
1701:April 12,
1670:April 12,
1612:April 12,
1559:April 12,
1458:April 12,
1364:April 12,
1296:April 13,
1246:April 11,
994:in 2002.
942:Wisconsin
938:Wauwatosa
829:and 8 in
806:Formation
785:geologist
773:Discovery
767:crinoidal
748:Llandeilo
717:Australia
682:Greenland
666:Argentina
657:). Their
644:Arenigian
556:sediments
493:isopygous
379:Australia
267:Murchison
244:Murchison
185:Trilobita
158:Kingdom:
152:Eukaryota
2960:Bumastus
2939:Wikidata
2930:Bumastus
2882:Antennae
2830:Prosopon
2775:Glabella
2760:Fixigena
2712:Pygidium
2702:Cephalon
2543:Cruziana
2380:Smallest
2363:Isotelus
2345:Calymene
2313:Kathwaia
2292:Acropyge
2237:Earliest
2209:Devonian
2204:Silurian
2194:Cambrian
2140:Proetida
2110:Asaphida
2088:Taxonomy
2033:Bumastus
1973:Bumastus
1633:(1865).
1347:Geofacts
1238:Bumastus
1196:See also
1172:- Canada
1166:- Sweden
1124:- Canada
1106:- Canada
1078:- Canada
1064:- Canada
1008:Bumastus
974:Bumastus
946:pygidium
923:Taxonomy
894:Georgics
859:būmastus
845:Bumastus
836:Illaenus
831:Isotelus
822:Isotelus
782:Scottish
778:Bumastus
636:Bumastus
609:Bumastus
594:Bumastus
589:exposed.
583:sediment
579:Bumastus
575:Bumastus
548:Bumastus
510:Bumastus
489:pygidium
482:fixigena
478:glabella
474:Bumastus
469:Trimerus
463:Illaenus
431:cephalon
424:Bumastus
420:Bumastus
404:Bumastus
359:Bumastus
349:Silurian
323:Bumastus
304:Silurian
238:Bumastus
204:Family:
168:Phylum:
162:Animalia
148:Domain:
128:Bumastus
36:Bumastus
3000:5128509
2987:1310548
2974:4636986
2694:Tagmata
2355:Largest
2219:Permian
2130:Lichida
1004:species
998:Species
965:in the
814:England
808:of the
702:Ukraine
678:Estonia
659:fossils
600:. When
454:effaced
412:tagmata
388:in the
328:extinct
276:Species
230:Genus:
191:Order:
178:Class:
2945:Q44049
2707:Thorax
2447:&
2284:Latest
2155:Genera
2097:Orders
2006:
1893:
1861:
1822:
1795:
1762:
1587:
1534:
1494:
1428:
1396:
1321:
1282:
978:family
890:Virgil
882:mastós
878:μαστός
863:udders
752:France
731:, the
721:Canada
704:, the
698:Sweden
692:, the
690:Norway
672:, the
670:Canada
476:. The
450:angles
416:thorax
383:family
377:, and
371:Europe
345:period
326:is an
311:Dudley
269:, 1839
246:, 1839
3013:19516
2982:IRMNG
2042:from
1847:(PDF)
1728:(PDF)
1721:(PDF)
1358:(PDF)
1343:(PDF)
985:order
961:from
936:from
867:Greek
856:Latin
852:grape
744:stage
729:Spain
725:China
647:epoch
611:is a
602:waves
538:from
447:genal
441:) is
439:molts
390:order
363:North
331:genus
2969:GBIF
2887:Eyes
2765:Gena
2247:spp.
2004:ISBN
1983:2011
1957:2011
1891:ISBN
1870:2011
1859:ISSN
1820:ISBN
1793:ISBN
1760:ISBN
1736:2011
1703:2011
1672:2011
1614:2011
1585:ISBN
1561:2011
1532:ISBN
1492:ISBN
1460:2011
1426:ISBN
1394:ISBN
1366:2011
1319:ISBN
1298:2011
1280:ISBN
1248:2011
899:The
874:bous
870:βοῦς
540:Iowa
466:and
429:The
375:Asia
365:and
285:text
283:See
48:PreꞒ
1789:276
1276:364
892:'s
812:in
740:age
569:An
333:of
126:of
122:An
3032::
3010::
2997::
2984::
2971::
2956::
2941::
1855:48
1853:.
1849:.
1834:^
1791:.
1744:^
1691:"†
1680:^
1660:31
1658:.
1654:.
1622:^
1569:^
1506:^
1480:;
1468:^
1440:^
1408:^
1374:^
1349:.
1345:.
1274:.
1270:.
1256:^
940:,
919:.
915:,
896:.
847:.
816:.
795:,
787:,
723:,
719:,
712:.
700:,
696:,
688:,
684:,
680:,
676:,
668:,
627:.
501:.
484:.
418:,
395:.
373:,
369:,
313:,
98:Pg
2072:e
2065:t
2058:v
2012:.
1985:.
1975:"
1959:.
1945:"
1899:.
1872:.
1828:.
1801:.
1768:.
1738:.
1705:.
1674:.
1616:.
1593:.
1563:.
1540:.
1500:.
1462:.
1434:.
1402:.
1368:.
1351:5
1327:.
1300:.
1250:.
1240:"
1236:"
1088:)
969:.
948:.
880:(
872:(
746:(
742:/
615:(
542:.
317:.
234:†
221:†
208:†
195:†
182:†
103:N
93:K
88:J
83:T
78:P
73:C
68:D
63:S
58:O
53:Ꞓ
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
