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Pterygotioidea

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870: 450: 461: 140: 3144: 624: 3447: 1286: 113: 1885:, which indicates that the group had spread significantly during their 70 million year existence. Pterygotioids appear to have been relatively abundant throughout the Silurian and Devonian world, with unusually (in terms of eurypterids, most groups being absent entirely) large numbers recovered from the ancient continent of 611:. These appendages are the only ones that appear before the mouth and take the form of small pincers used to feed in most eurypterid groups. This function is retained in the more basal Hughmilleriidae and Slimonidae, but pterygotid chelicerae were large and long with strong and well developed teeth on specialized 1315:
Though the Pterygotidae are accepted to clearly represent the most derived group within the pterygotioid superfamily, there has been an ongoing debate on whether the hughmilleriids or the slimonids are the most closely related to the pterygotids, and thus also which of the two families is the most
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Pterygotioidea is the most derived superfamily of the suborder and contains over 50 species (the exact number obscured by dubious species and possible synonyms), which accounts for more than a fifth of the approximately 250 known eurypterid species. The closest sister group of the Pterygotioidea,
403:
Among all currently recognized eurypterid clades, the Pterygotioidea is the most diverse, containing over 50 species in 10 genera. With the number of recognized eurypterid species being around 250, pterygotioids account for more than a fifth of all known eurypterid species. Though the group only
1935:
It remains unclear whether pterygotioids were capable of crossing oceans on a regular basis or if species recovered outside of Laurentia, Baltica and Avalonia represent isolated occurrences. Pterygotioids were, like the related adelophthalmoids, excellent swimmers which might help explain the
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Though several characteristic and diagnostic traits can be established for each of the families included within the Pterygotioidea, the group as a whole is primarily joined by the shared features of marginal eyes, that their compound eyes are placed near or on the margin of the
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The cladogram presented below, derived from a 2007 study by researcher O. Erik Tetlie, showcases the interrelationships between the pterygotioid eurypterids. Whilst Slimonidae and Pterygotidae form monophyletic (and thus valid) groups, Hughmilleriidae has been recovered as
399:
being the smallest of all pterygotioids at just 6 centimetres (2.4 in) in length, later members of the group, particularly in the Pterygotidae, would become the largest known arthropods to ever exist with several genera surpassing 2 metres (6.6 ft) in length.
672:, meaning "winged one". Agassiz mistakenly believed that the fossils were the remains of a large fish. Agassiz first recognized the true nature of the fossils as arthropod remains five years later in 1844 after having examined more complete fossils recovered in the 1928:. With the group already being widespread at this seemingly early stage in their evolution, it is difficult to pinpoint their exact geographical point of origin. The closest relatives and sister clade of the pterygotioids, the superfamily 2338:
The Silurian System, Founded on Geological Researches in the Counties of Salop, Hereford, Radnor, Montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worcester, and Stafford: With Descriptions of the Coalfields and Overlying
2029:
Olive, Sébastien; Pradel, Alan; Martinez-Pérez, Carlos; Janvier, Philippe; Lamsdell, James C.; Gueriau, Pierre; Rabet, Nicolas; Duranleau-Gagnon, Philippe; Cardenas-Rozo, Andres L.; Zapata Ramirez, Paula A.; Botella, Héctor (2019).
2526: 1337:, combined with the fact that the genus shares certain characteristics with basal adelophthalmids (in particular the triangular anterior margin of the carapace), places it as the most basal genus in the superfamily. 594:(the posteriormost segment of the body) was expanded and flattened, often with a spike protruding from its end. The telsons of the Hughmilleriidae were not flattened, instead being lanceolate (in the shape of a 1341:
also possessed far more gnathobasic (of the gnathobase, an appendage used in feeding) teeth than any other pterygotioid, possessing 18-20 whilst more derived pterygotioids (including related hughmilleriid
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The cladogram below is simplified from 2007 study by O. Erik Tetlie, showcasing the position of the pterygotioids within the suborder Eurypterina. Placement of Diploperculata follows Lamsdell
1932:, originated in Laurentia. Modern researchers assume that the case would be the same with the pterygotioids, which are thought to have originated within, or in close proximity to, Laurentia. 404:
existed for around 70 million years and during a time when most continents were separated by large expanses of water (in contrast with previous and later periods of time when there had been
579:(abdomen). The appendages were attached to the prosoma, and were characterized in pterygotids and slimonids by being small and slender and lacking spines. In contrast, the more 412:
of all eurypterid groups. Their fossils have been recovered from Europe, Africa, North America, South America, Asia and Australia, with the earliest remains being from the
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into a pterygotioid family of its own as it was considered distinct enough from other hughmilleriids to warrant a separate family, the Slimonidae.
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would later be raised to its own genus. American paleontologist Erik N. Kjellesvig-Waering emended the Pterygotidae in 1951, referring the genera
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and does thus not form an actually valid scientific grouping. Nevertheless, the family is retained and routinely used by eurypterid researchers.
1845:
Pterygotioid fossils have also been recovered from other parts of the world where fossils of other eurypterid groups are absent, including
741:. Its describer, the American geologist Clifton J. Sarle, considered the genus to represent an intermediate form between the more basal 2615:"A new Ordovician eurypterid (Arthropoda: Chelicerata) from southeast Turkey: Evidence for a cryptic Ordovician record of Eurypterida" 857:
and creating the superfamily Pterygotioidea, containing Hughmilleriidae and Pterygotidae. The same year, Novojilov also reclassified
1826:. During the Silurian and Devonian periods, when pterygotioids were alive, these regions and continents were part of the continents 900:
suborder of eurypterids. The infraorder Diploperculata contains the four most derived superfamilies of eurypterine eurypterids;
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Adelophthalmoidea, also contains a large amount of species, over 40, and is the second most diverse eurypterid superfamily.
3545: 1326:(especially within the appendages) and of more derived pterygotid eurypterids, revealing that Slimonidae was the closest 3175: 2036: 2032:"New insights into Late Devonian vertebrates and associated fauna from the Cuche Formation (Floresta Massif, Colombia)" 2425:
Kjellesvig-Waering, Erik N. (1964). "A Synopsis of the Family Pterygotidae Clarke and Ruedemann, 1912 (Eurypterida)".
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Tetlie, O. Erik; Briggs, Derek E. G. (2009-09-01). "The origin of pterygotid eurypterids (Chelicerata: Eurypterida)".
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raised the Eurypteracea and Pterygotidae to subordinal and superfamily status, Eurypteracea becoming the suborder
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Tollerton, V. P. (1989). "Morphology, taxonomy, and classification of the order Eurypterida Burmeister, 1843".
2091:"Cope's rule and Romer's theory: patterns of diversity and gigantism in eurypterids and Palaeozoic vertebrates" 3170: 3165: 3203: 3180: 139: 568: 850: 2836: 2728: 2279:
Plotnick, Roy E.; Baumiller, Tomasz K. (1988-01-01). "The pterygotid telson as a biological rudder".
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eurypterids by the placement of their eyes, being located near or in some cases on the margin of the
409: 3540: 3503: 1925: 1561: 587: 521: 127: 3517: 3465: 3143: 846: 711: 533: 336: 2575:. In Orlov, J. A. (ed.): Osnovy Paleontologii - volume 7, 404-423. Akademii Nauk SSSR, Moscow. 1936:
intercontinental dispersal patterns and wide-ranging distribution seen in both superfamilies.
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most apparently by the lack of large cheliceral claws, otherwise a defining characteristic of
3512: 1357: 580: 424:. The exact geographical origin of the group remains unknown, but is thought to have been in 371: 913: 509:(the "head" plate). Pterygotioids ranged in size from small eurypterids, the smallest being 3450: 2721: 2685: 2626: 2589: 2378: 2288: 2234: 2045: 1987: 493:
Pterygotioid eurypterids, whose fossils are recovered in deposits ranging in age from the
8: 2369:
Tetlie, O. Erik (2006). "Eurypterida (Chelicerata) from the Welsh Borderlands, England".
1839: 1537: 688: 628: 247: 2689: 2630: 2382: 2292: 2238: 2049: 1991: 2554: 2527:"Pterygotids (Chelicerata; Eurypterida) from the Silurian Vernon Formation of New York" 2481: 2434: 2402: 2300: 2258: 2180: 2153: 2125: 2071: 2011: 1479: 869: 291: 134: 122: 916:(the structure that contains the genital appendage) is made up of two fused segments. 3039: 2972: 2964: 2614: 2558: 2546: 2485: 2473: 2394: 2304: 2250: 2185: 2130: 2112: 2075: 2031: 2003: 1999: 1929: 1079: 1057: 1035: 905: 901: 761: 673: 367: 225: 2406: 2262: 2090: 2015: 1838:(most of eastern continental North America). It is around these continents, and the 449: 3379: 3093: 3085: 3075: 3067: 3047: 3018: 2934: 2883: 2693: 2634: 2538: 2465: 2386: 2336: 2296: 2242: 2175: 2167: 2120: 2104: 2061: 2053: 1995: 1917: 988: 765: 754: 738: 302: 229: 2057: 3408: 3254: 3111: 3052: 3008: 2911: 2898: 2697: 2158: 2095: 1455: 1344: 1129: 909: 561: 375: 270: 2500: 842: 311: 3488: 3324: 3282: 3240: 3030: 2990: 2982: 2906: 1815: 1022: 893: 494: 460: 413: 405: 359: 207: 28: 2390: 2246: 3534: 3331: 3303: 3296: 3268: 3247: 3000: 2939: 2929: 2921: 2875: 2865: 2857: 2813: 2777: 2638: 2550: 2477: 2398: 2308: 2254: 2116: 2007: 1898: 1874: 1823: 1819: 1010: 737:
was created based on fossils discovered in the Pittsford Shale Member of the
657: 612: 498: 352: 253: 70: 32: 2454:"III. On the Occurrence of Fossils in the Old Red Sandstone of Westmoreland" 845:
considered the pterygotid clade to represent a family within the eurypterid
3289: 3121: 3057: 3013: 2888: 2469: 2189: 2171: 2134: 2108: 1862: 1718: 1701: 1677: 1653: 1506: 1492: 1422: 1405: 1381: 1353: 1327: 1318: 1307: 1176: 1105: 875: 830: 812: 733: 704: 623: 549: 511: 479: 395: 383: 363: 282: 238: 3497: 3386: 3363: 3261: 2955: 2848: 2786: 2768: 1811: 1290: 975: 954: 934: 897: 854: 640: 576: 553: 529: 502: 421: 181: 45: 2501:"A new eurypterid fauna from the base of the Salina of western New York" 834:, to their own family within the Eurypteracea, Hughmilleriidae, leaving 3352: 3338: 3317: 3310: 3275: 3116: 2804: 2795: 2744: 2438: 2211:
Treatise on Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
2066: 1906: 1602: 1585: 1295: 692: 649: 633: 608: 600: 557: 483: 470: 387: 379: 356: 340: 331: 327: 276: 194: 112: 90: 55: 1842:(western and central Europe), that pterygotioids are the most common. 532:, and other arthropods in general, pterygotioid eurypterids possessed 3429: 3413: 3403: 2762: 1902: 1846: 1835: 1285: 791: 778: 665: 661: 598:
or spike) and similar to those of more primitive eurypterids such as
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was covered in a scale-like ornamentation but it was smooth within
506: 474: 433: 417: 85: 80: 65: 60: 50: 2669:"Distribution and dispersal history of Eurypterida (Chelicerata)" 1882: 1878: 1858: 1850: 1827: 648:
The first pterygotioid fossils to be uncovered were those of the
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Eurypterids are most commonly recovered from fossil deposits in
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10.1666/pleo0022-3360(2007)081[0725:PEFTSV]2.0.CO;2
1890: 591: 545: 161: 2713: 1920:
of the Silurian and appear around the same time in Laurentia,
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which might have reached lengths of 2.6 metres (8.5 ft).
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at just 6 centimetres (2.4 in) in length, to the largest
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as "winged fish", but there is no "fish" element in the name.
2152:
Braddy, Simon J.; Poschmann, Markus; Tetlie, O. Erik (2007).
1894: 1870: 1866: 1854: 595: 2613:
Lamsdell, James; Hoşgör, Izzet; Selden, Paul (2013-01-31).
1322:, a primitive pterygotid that clearly combines features of 714:
erected a new genus to contain the species. The new genus,
699:, were soon realized to be distinct from other species of 1912:
The earliest known pterygotioids, belonging to the genus
1316:
basal. This debate was resolved with the description of
1834:(Germany, Britain, parts of eastern North America) and 691:. The fossils referred to this species, recovered from 590:
members of the group, Slimonidae and Pterygotidae, the
583:
Hughmilleriids did possess spines on their appendages.
2590:"A summary list of fossil spiders and their relatives" 720:, could be differentiated from other known species of 2151: 393:
Though the more primitive hughmilleriids were small,
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is the most basal known genus in the Pterygotioidea.
668:, described the fossils in 1839 and named the genus 892:Pterygotioids are classified within the infraorder 536:bodies and jointed appendages (limbs) covered in a 2424: 2677:Palaeogeography, Palaeoclimatology, Palaeoecology 2587: 2278: 607:Like other chelicerates, pterygotioids possessed 3532: 2458:Transactions of the Edinburgh Geological Society 849:"Eurypteracea". In 1962, Russian paleontologist 841:In 1955, Norwegian paleontologist and geologist 2154:"Giant claw reveals the largest ever arthropod" 760:The family Pterygotidae was erected in 1912 by 2088: 2729: 2588:Dunlop, J. A.; Penney, D.; Jekel, D. (2018). 2089:Lamsdell, James C.; Braddy, Simon J. (2009). 386:which were equipped with robust and powerful 2524: 1977: 638:" in 1852. This species is now considered a 2525:Ciurca, Samuel J.; Tetlie, O. Erik (2007). 2344:Note that this work incorrectly translates 1333:The lack of ornamentation in the telson of 790:had also been designated as containing two 2736: 2722: 111: 2451: 2334: 2224: 2179: 2124: 2065: 567:The chelicerate body is divided into two 1284: 912:, united by the shared feature that the 868: 622: 2662: 2660: 2658: 2656: 2654: 2652: 2650: 2648: 2583: 2581: 2452:Nicholson, Henry Alleyne (1868-01-01). 2207: 1973: 1971: 1969: 1967: 1965: 3533: 2666: 2420: 2418: 2416: 2368: 2364: 2362: 2360: 2358: 2356: 2354: 1293:of each of the pterygotioid families, 618: 501:, can be distinguished from all other 3464: 3463: 2717: 2608: 2606: 2520: 2518: 2498: 2274: 2272: 2208:Størmer, Leif (1955). "Merostomata". 2145: 1280: 887: 768:to constitute a group for the genera 2645: 2578: 2321:Clarke, J. K., Ruedemann R. (1912) " 2203: 2201: 2199: 1962: 370:eurypterids. The group includes the 2413: 2351: 2022: 408:), the Pterygotioidea had the most 13: 2603: 2515: 2492: 2335:Murchison, Roderick Impey (1839). 2328: 2301:10.1111/j.1502-3931.1988.tb01746.x 2269: 2218: 2037:Journal of Vertebrate Paleontology 1830:(Scandinavia and Eastern Europe), 16:Extinct superfamily of eurypterids 14: 3567: 2315: 2196: 2082: 864: 3446: 3445: 3142: 2342:. Albemarle Street. p. 606. 2000:10.1111/j.1475-4983.2009.00907.x 519:to ever live, the largest being 459: 448: 138: 43: 3435:Timeline of eurypterid research 2743: 2565: 2445: 1951:Timeline of eurypterid research 1805: 710:) and that same year geologist 128:Senckenberg Museum of Frankfurt 2599:. Natural History Museum Bern. 2505:New York State Museum Bulletin 838:as the sole pterygotid genus. 439: 343:, an extinct group of aquatic 1: 2058:10.1080/02724634.2019.1620247 1956: 378:, the larger and specialized 335:, meaning "winged one") is a 2698:10.1016/j.palaeo.2007.05.011 326:(the name deriving from the 7: 3546:Paleozoic first appearances 2323:The Eurypterida of New York 1939: 552:, the outer surface of the 10: 3572: 2499:Sarle, Clifton J. (1902). 1719:Erettopterus waylandsmithi 1678:Erettopterus serricaudatus 851:Nestor Ivanovich Novojilov 3472: 3443: 3422: 3396: 3362: 3232: 3189: 3151: 3140: 3102: 3084: 3066: 3038: 3027: 2999: 2981: 2963: 2952: 2920: 2897: 2874: 2856: 2845: 2837:List of eurypterid genera 2829: 2822: 2751: 2391:10.1017/S0016756806002536 2247:10.1017/S0022336000041275 1946:List of eurypterid genera 1715: 1698: 1691: 1674: 1667: 1650: 1643: 1599: 1586:Acutiramus macrophthalmus 1582: 1575: 1558: 1551: 1534: 1527: 1520: 1503: 1496: 1476: 1469: 1452: 1445: 1419: 1402: 1395: 1378: 1371: 1174: 1167: 1150: 1143: 1126: 1119: 1102: 1095: 1077: 1070: 1055: 1048: 1033: 1026: 1008: 1001: 986: 979: 952: 945: 938: 908:, Pterygotioidea and the 410:cosmopolitan distribution 297: 290: 266: 261: 244: 237: 135:Scientific classification 133: 119: 110: 23: 2667:Tetlie, O. Erik (2007). 2639:10.1016/j.gr.2012.04.006 1507:Ciurcopterus ventricosus 1348:) possessed only 12–13. 571:(sections); the frontal 3556:Arthropod superfamilies 2531:Journal of Paleontology 2427:Journal of Paleontology 2227:Journal of Paleontology 1840:Rheno-Hercynian Terrane 1702:Erettopterus osiliensis 1562:Jaekelopterus rhenaniae 1456:Herefordopterus banksii 1423:Hughmilleria shawangunk 522:Jaekelopterus rhenaniae 2470:10.1144/transed.1.1.15 2172:10.1098/rsbl.2007.0491 2109:10.1098/rsbl.2009.0700 1312: 1311:, compared to a human. 884: 828:, and the newly named 645: 3551:Paleozoic extinctions 3513:Paleobiology Database 2139:Supplemental material 1406:Hughmilleria socialis 1358:phylogenetic analyses 1330:of the Pterygotidae. 1289:Largest sizes of the 1288: 876:Hughmilleria socialis 872: 683:In 1856, the species 627:Fossils described by 626: 575:(head) and posterior 2597:World Spider Catalog 2571:Novojilov, N. 1962: 1654:Erettopterus bilobus 1603:Acutiramus bohemicus 685:Pterygotus acuminata 436:(the "head" plate). 2690:2007PPP...252..557T 2631:2013GondR..23..354L 2383:2006GeoM..143..723T 2371:Geological Magazine 2293:1988Letha..21...13P 2239:1989JPal...63..642T 2050:2019JVPal..39E0247O 1992:2009Palgy..52.1141T 1538:Pterygotus anglicus 749:but did not assign 731:In 1903, the genus 689:John William Salter 660:, a Swiss-American 629:John William Salter 619:History of research 248:Pterygotus anglicus 2965:Onychopterelloidea 1480:Slimonia acuminata 1382:Hughmilleria wangi 1313: 1281:Internal phylogeny 888:External phylogeny 885: 873:Reconstruction of 753:to any particular 646: 512:Hughmilleria wangi 478:(top) and derived 396:Hughmilleria wangi 123:Slimonia acuminata 3528: 3527: 3466:Taxon identifiers 3457: 3456: 3138: 3137: 3134: 3133: 3130: 3129: 3086:Adelophthalmoidea 3068:Waeringopteroidea 3040:Carcinosomatoidea 2973:Onychopterellidae 2948: 2947: 2619:Gondwana Research 2573:Order Eurypterida 1930:Adelophthalmoidea 1802: 1801: 1793: 1792: 1784: 1783: 1775: 1774: 1766: 1765: 1757: 1756: 1748: 1747: 1739: 1738: 1730: 1729: 1632: 1631: 1623: 1622: 1614: 1613: 1434: 1433: 1277: 1276: 1268: 1267: 1259: 1258: 1250: 1249: 1241: 1240: 1232: 1231: 1223: 1222: 1214: 1213: 1205: 1204: 1196: 1195: 1187: 1186: 1080:Adelophthalmoidea 1058:Waeringopteroidea 1036:Carcinosomatoidea 965: 964: 914:genital operculum 906:Adelophthalmoidea 902:Carcinosomatoidea 762:John Mason Clarke 674:Old Red Sandstone 631:as belonging to " 321: 320: 315: 309:Hughmillerioidea 306: 233: 3563: 3521: 3520: 3508: 3507: 3506: 3493: 3492: 3491: 3461: 3460: 3449: 3448: 3423:Related articles 3380:Merostomichnites 3146: 3094:Adelophthalmidae 3076:Waeringopteridae 3048:Carcinosomatidae 3036: 3035: 3019:Strobilopteridae 2961: 2960: 2935:Hibbertopteridae 2884:Parastylonuridae 2854: 2853: 2827: 2826: 2738: 2731: 2724: 2715: 2714: 2709: 2708: 2706: 2700:. Archived from 2684:(3–4): 557–574. 2673: 2664: 2643: 2642: 2610: 2601: 2600: 2594: 2585: 2576: 2569: 2563: 2562: 2522: 2513: 2512: 2496: 2490: 2489: 2449: 2443: 2442: 2422: 2411: 2410: 2366: 2349: 2343: 2332: 2326: 2319: 2313: 2312: 2276: 2267: 2266: 2222: 2216: 2215: 2205: 2194: 2193: 2183: 2149: 2143: 2142: 2128: 2086: 2080: 2079: 2069: 2026: 2020: 2019: 1986:(5): 1141–1148. 1975: 1918:Llandovery epoch 1694: 1693: 1670: 1669: 1646: 1645: 1578: 1577: 1554: 1553: 1530: 1529: 1523: 1522: 1499: 1498: 1472: 1471: 1448: 1447: 1398: 1397: 1374: 1373: 1364: 1363: 1170: 1169: 1146: 1145: 1122: 1121: 1098: 1097: 1073: 1072: 1051: 1050: 1029: 1028: 1004: 1003: 989:Megalograptoidea 982: 981: 948: 947: 941: 940: 931: 930: 910:waeringopteroids 766:Rudolf Ruedemann 745:and the derived 739:Vernon Formation 469:Restorations of 463: 452: 310: 301: 224: 219: 206: 193: 143: 142: 115: 105: 42: 27:Temporal range: 21: 20: 3571: 3570: 3566: 3565: 3564: 3562: 3561: 3560: 3531: 3530: 3529: 3524: 3516: 3511: 3502: 3501: 3496: 3487: 3486: 3481: 3468: 3458: 3453: 3439: 3418: 3409:Chasmataspidida 3392: 3358: 3255:Campylocephalus 3228: 3185: 3147: 3126: 3112:Hughmilleriidae 3098: 3080: 3062: 3053:Megalograptidae 3029: 3023: 3009:Dolichopteridae 2995: 2983:Moselopteroidea 2977: 2954: 2944: 2930:Drepanopteridae 2916: 2912:Hardieopteridae 2899:Kokomopteroidea 2893: 2870: 2847: 2841: 2818: 2747: 2742: 2712: 2704: 2671: 2665: 2646: 2611: 2604: 2592: 2586: 2579: 2570: 2566: 2523: 2516: 2497: 2493: 2450: 2446: 2423: 2414: 2367: 2352: 2333: 2329: 2320: 2316: 2277: 2270: 2223: 2219: 2206: 2197: 2159:Biology Letters 2150: 2146: 2096:Biology Letters 2087: 2083: 2044:(3): e1620247. 2027: 2023: 1976: 1963: 1959: 1942: 1916:, are from the 1808: 1803: 1794: 1785: 1776: 1767: 1758: 1749: 1740: 1731: 1633: 1624: 1615: 1435: 1356:in a number of 1345:Herefordopterus 1283: 1278: 1269: 1260: 1251: 1242: 1233: 1224: 1215: 1206: 1197: 1188: 1130:Herefordopterus 966: 890: 867: 621: 562:Hughmilleriidae 528:Like all other 491: 490: 489: 488: 466: 465: 464: 455: 454: 453: 442: 406:supercontinents 382:and the famous 368:adelophthalmoid 355:members of the 271:Hughmilleriidae 257: 251: 223: 217: 204: 191: 137: 106: 104: 103: 98: 93: 88: 83: 78: 73: 68: 63: 58: 53: 48: 38:442–372.2  37: 36: 25: 17: 12: 11: 5: 3569: 3559: 3558: 3553: 3548: 3543: 3541:Pterygotioidea 3526: 3525: 3523: 3522: 3509: 3494: 3478: 3476: 3474:Pterygotioidea 3470: 3469: 3455: 3454: 3444: 3441: 3440: 3438: 3437: 3432: 3426: 3424: 3420: 3419: 3417: 3416: 3411: 3406: 3400: 3398: 3397:Related groups 3394: 3393: 3391: 3390: 3383: 3376: 3368: 3366: 3360: 3359: 3357: 3356: 3349: 3342: 3335: 3328: 3325:Onychopterella 3321: 3314: 3307: 3300: 3293: 3286: 3283:Hibbertopterus 3279: 3272: 3265: 3258: 3251: 3244: 3241:Adelophthalmus 3236: 3234: 3233:Notable genera 3230: 3229: 3227: 3226: 3221: 3216: 3211: 3206: 3201: 3195: 3193: 3187: 3186: 3184: 3183: 3178: 3173: 3168: 3163: 3157: 3155: 3149: 3148: 3141: 3139: 3136: 3135: 3132: 3131: 3128: 3127: 3125: 3124: 3119: 3114: 3108: 3106: 3104:Pterygotioidea 3100: 3099: 3097: 3096: 3090: 3088: 3082: 3081: 3079: 3078: 3072: 3070: 3064: 3063: 3061: 3060: 3055: 3050: 3044: 3042: 3033: 3031:Diploperculata 3025: 3024: 3022: 3021: 3016: 3011: 3005: 3003: 2997: 2996: 2994: 2993: 2991:Moselopteridae 2987: 2985: 2979: 2978: 2976: 2975: 2969: 2967: 2958: 2950: 2949: 2946: 2945: 2943: 2942: 2937: 2932: 2926: 2924: 2918: 2917: 2915: 2914: 2909: 2907:Kokomopteridae 2903: 2901: 2895: 2894: 2892: 2891: 2886: 2880: 2878: 2872: 2871: 2869: 2868: 2862: 2860: 2858:Rhenopteroidea 2851: 2843: 2842: 2840: 2839: 2833: 2831: 2824: 2820: 2819: 2817: 2816: 2807: 2798: 2789: 2780: 2771: 2765: 2759: 2752: 2749: 2748: 2741: 2740: 2733: 2726: 2718: 2711: 2710: 2707:on 2011-07-18. 2644: 2625:(1): 354–366. 2602: 2577: 2564: 2537:(4): 725–736. 2514: 2491: 2444: 2433:(2): 331–361. 2412: 2377:(5): 723–735. 2350: 2327: 2314: 2268: 2233:(5): 642–657. 2217: 2195: 2166:(1): 106–109. 2144: 2103:(2): 265–269. 2081: 2021: 1960: 1958: 1955: 1954: 1953: 1948: 1941: 1938: 1816:Eastern Europe 1807: 1804: 1800: 1799: 1796: 1795: 1791: 1790: 1787: 1786: 1782: 1781: 1778: 1777: 1773: 1772: 1769: 1768: 1764: 1763: 1760: 1759: 1755: 1754: 1751: 1750: 1746: 1745: 1742: 1741: 1737: 1736: 1733: 1732: 1728: 1727: 1724: 1723: 1714: 1711: 1710: 1707: 1706: 1697: 1692: 1690: 1687: 1686: 1683: 1682: 1673: 1668: 1666: 1663: 1662: 1659: 1658: 1649: 1644: 1642: 1639: 1638: 1635: 1634: 1630: 1629: 1626: 1625: 1621: 1620: 1617: 1616: 1612: 1611: 1608: 1607: 1598: 1595: 1594: 1591: 1590: 1581: 1576: 1574: 1571: 1570: 1567: 1566: 1557: 1552: 1550: 1547: 1546: 1543: 1542: 1533: 1528: 1526: 1521: 1519: 1516: 1515: 1512: 1511: 1502: 1497: 1495: 1489: 1488: 1485: 1484: 1475: 1470: 1468: 1465: 1464: 1461: 1460: 1451: 1446: 1444: 1441: 1440: 1437: 1436: 1432: 1431: 1428: 1427: 1418: 1415: 1414: 1411: 1410: 1401: 1396: 1394: 1391: 1390: 1387: 1386: 1377: 1372: 1370: 1368:Pterygotioidea 1362: 1282: 1279: 1275: 1274: 1271: 1270: 1266: 1265: 1262: 1261: 1257: 1256: 1253: 1252: 1248: 1247: 1244: 1243: 1239: 1238: 1235: 1234: 1230: 1229: 1226: 1225: 1221: 1220: 1217: 1216: 1212: 1211: 1208: 1207: 1203: 1202: 1199: 1198: 1194: 1193: 1190: 1189: 1185: 1184: 1181: 1180: 1173: 1168: 1166: 1163: 1162: 1159: 1158: 1149: 1144: 1142: 1139: 1138: 1135: 1134: 1125: 1120: 1118: 1115: 1114: 1111: 1110: 1101: 1096: 1094: 1092:Pterygotioidea 1088: 1087: 1084: 1083: 1076: 1071: 1069: 1066: 1065: 1062: 1061: 1054: 1049: 1047: 1044: 1043: 1040: 1039: 1032: 1027: 1025: 1023:Diploperculata 1019: 1018: 1015: 1014: 1007: 1002: 1000: 997: 996: 993: 992: 985: 980: 978: 972: 971: 968: 967: 963: 962: 959: 958: 951: 946: 944: 939: 937: 929: 894:Diploperculata 889: 886: 866: 865:Classification 863: 620: 617: 495:Early Silurian 468: 467: 458: 457: 456: 447: 446: 445: 444: 443: 441: 438: 414:Early Silurian 376:hughmilleriids 360:Diploperculata 351:were the most 324:Pterygotioidea 319: 318: 317: 316: 307: 295: 294: 288: 287: 286: 285: 279: 273: 264: 263: 259: 258: 252: 242: 241: 235: 234: 221:Pterygotioidea 215: 211: 210: 208:Diploperculata 202: 198: 197: 189: 185: 184: 179: 175: 174: 169: 165: 164: 159: 155: 154: 149: 145: 144: 131: 130: 126:housed at the 117: 116: 108: 107: 99: 94: 89: 84: 79: 74: 69: 64: 59: 54: 49: 44: 29:Early Silurian 26: 24:Pterygotioidea 15: 9: 6: 4: 3: 2: 3568: 3557: 3554: 3552: 3549: 3547: 3544: 3542: 3539: 3538: 3536: 3519: 3514: 3510: 3505: 3504:Pterygotoidea 3499: 3495: 3490: 3484: 3480: 3479: 3477: 3475: 3471: 3467: 3462: 3452: 3442: 3436: 3433: 3431: 3428: 3427: 3425: 3421: 3415: 3412: 3410: 3407: 3405: 3402: 3401: 3399: 3395: 3389: 3388: 3384: 3382: 3381: 3377: 3375: 3374: 3370: 3369: 3367: 3365: 3361: 3355: 3354: 3350: 3348: 3347: 3343: 3341: 3340: 3336: 3334: 3333: 3332:Pentecopterus 3329: 3327: 3326: 3322: 3320: 3319: 3315: 3313: 3312: 3308: 3306: 3305: 3304:Megalograptus 3301: 3299: 3298: 3297:Jaekelopterus 3294: 3292: 3291: 3287: 3285: 3284: 3280: 3278: 3277: 3273: 3271: 3270: 3269:Drepanopterus 3266: 3264: 3263: 3259: 3257: 3256: 3252: 3250: 3249: 3248:Brachyopterus 3245: 3243: 3242: 3238: 3237: 3235: 3231: 3225: 3224:South America 3222: 3220: 3217: 3215: 3214:North America 3212: 3210: 3207: 3205: 3202: 3200: 3197: 3196: 3194: 3192: 3188: 3182: 3179: 3177: 3176:Carboniferous 3174: 3172: 3169: 3167: 3164: 3162: 3159: 3158: 3156: 3154: 3153:Geochronology 3150: 3145: 3123: 3120: 3118: 3115: 3113: 3110: 3109: 3107: 3105: 3101: 3095: 3092: 3091: 3089: 3087: 3083: 3077: 3074: 3073: 3071: 3069: 3065: 3059: 3056: 3054: 3051: 3049: 3046: 3045: 3043: 3041: 3037: 3034: 3032: 3026: 3020: 3017: 3015: 3012: 3010: 3007: 3006: 3004: 3002: 3001:Eurypteroidea 2998: 2992: 2989: 2988: 2986: 2984: 2980: 2974: 2971: 2970: 2968: 2966: 2962: 2959: 2957: 2951: 2941: 2940:Mycteroptidae 2938: 2936: 2933: 2931: 2928: 2927: 2925: 2923: 2922:Mycteropoidea 2919: 2913: 2910: 2908: 2905: 2904: 2902: 2900: 2896: 2890: 2887: 2885: 2882: 2881: 2879: 2877: 2876:Stylonuroidea 2873: 2867: 2866:Rhenopteridae 2864: 2863: 2861: 2859: 2855: 2852: 2850: 2844: 2838: 2835: 2834: 2832: 2828: 2825: 2821: 2815: 2814:Sclerophorata 2811: 2808: 2806: 2802: 2799: 2797: 2793: 2790: 2788: 2784: 2781: 2779: 2778:Euchelicerata 2775: 2772: 2770: 2766: 2764: 2760: 2758: 2754: 2753: 2750: 2746: 2739: 2734: 2732: 2727: 2725: 2720: 2719: 2716: 2703: 2699: 2695: 2691: 2687: 2683: 2679: 2678: 2670: 2663: 2661: 2659: 2657: 2655: 2653: 2651: 2649: 2640: 2636: 2632: 2628: 2624: 2620: 2616: 2609: 2607: 2598: 2591: 2584: 2582: 2574: 2568: 2560: 2556: 2552: 2548: 2544: 2540: 2536: 2532: 2528: 2521: 2519: 2510: 2506: 2502: 2495: 2487: 2483: 2479: 2475: 2471: 2467: 2463: 2459: 2455: 2448: 2440: 2436: 2432: 2428: 2421: 2419: 2417: 2408: 2404: 2400: 2396: 2392: 2388: 2384: 2380: 2376: 2372: 2365: 2363: 2361: 2359: 2357: 2355: 2347: 2341: 2340: 2331: 2324: 2318: 2310: 2306: 2302: 2298: 2294: 2290: 2286: 2282: 2275: 2273: 2264: 2260: 2256: 2252: 2248: 2244: 2240: 2236: 2232: 2228: 2221: 2214:. p. 23. 2213: 2212: 2204: 2202: 2200: 2191: 2187: 2182: 2177: 2173: 2169: 2165: 2161: 2160: 2155: 2148: 2140: 2136: 2132: 2127: 2122: 2118: 2114: 2110: 2106: 2102: 2098: 2097: 2092: 2085: 2077: 2073: 2068: 2063: 2059: 2055: 2051: 2047: 2043: 2039: 2038: 2033: 2025: 2017: 2013: 2009: 2005: 2001: 1997: 1993: 1989: 1985: 1981: 1980:Palaeontology 1974: 1972: 1970: 1968: 1966: 1961: 1952: 1949: 1947: 1944: 1943: 1937: 1933: 1931: 1927: 1923: 1919: 1915: 1910: 1908: 1904: 1900: 1899:South America 1896: 1892: 1889:(composed of 1888: 1884: 1880: 1876: 1875:South America 1872: 1868: 1864: 1860: 1856: 1852: 1848: 1843: 1841: 1837: 1833: 1829: 1825: 1824:North America 1821: 1817: 1813: 1798: 1797: 1789: 1788: 1780: 1779: 1771: 1770: 1762: 1761: 1753: 1752: 1744: 1743: 1735: 1734: 1726: 1725: 1722: 1721: 1720: 1713: 1712: 1709: 1708: 1705: 1704: 1703: 1696: 1695: 1689: 1688: 1685: 1684: 1681: 1680: 1679: 1672: 1671: 1665: 1664: 1661: 1660: 1657: 1656: 1655: 1648: 1647: 1641: 1640: 1637: 1636: 1628: 1627: 1619: 1618: 1610: 1609: 1606: 1605: 1604: 1597: 1596: 1593: 1592: 1589: 1588: 1587: 1580: 1579: 1573: 1572: 1569: 1568: 1565: 1564: 1563: 1556: 1555: 1549: 1548: 1545: 1544: 1541: 1540: 1539: 1532: 1531: 1525: 1524: 1518: 1517: 1514: 1513: 1510: 1509: 1508: 1501: 1500: 1494: 1491: 1490: 1487: 1486: 1483: 1482: 1481: 1474: 1473: 1467: 1466: 1463: 1462: 1459: 1458: 1457: 1450: 1449: 1443: 1442: 1439: 1438: 1430: 1429: 1426: 1425: 1424: 1417: 1416: 1413: 1412: 1409: 1408: 1407: 1400: 1399: 1393: 1392: 1389: 1388: 1385: 1384: 1383: 1376: 1375: 1369: 1366: 1365: 1361: 1359: 1355: 1349: 1347: 1346: 1340: 1336: 1331: 1329: 1325: 1321: 1320: 1310: 1309: 1304: 1303: 1298: 1297: 1292: 1287: 1273: 1272: 1264: 1263: 1255: 1254: 1246: 1245: 1237: 1236: 1228: 1227: 1219: 1218: 1210: 1209: 1201: 1200: 1192: 1191: 1183: 1182: 1179: 1178: 1172: 1171: 1165: 1164: 1161: 1160: 1157: 1156: 1155: 1148: 1147: 1141: 1140: 1137: 1136: 1133: 1132: 1131: 1124: 1123: 1117: 1116: 1113: 1112: 1109: 1108: 1107: 1100: 1099: 1093: 1090: 1089: 1086: 1085: 1082: 1081: 1075: 1074: 1068: 1067: 1064: 1063: 1060: 1059: 1053: 1052: 1046: 1045: 1042: 1041: 1038: 1037: 1031: 1030: 1024: 1021: 1020: 1017: 1016: 1013: 1012: 1011:Eurypteroidea 1006: 1005: 999: 998: 995: 994: 991: 990: 984: 983: 977: 974: 973: 970: 969: 961: 960: 957: 956: 950: 949: 943: 942: 936: 933: 932: 928: 926: 921: 917: 915: 911: 907: 903: 899: 895: 882: 878: 877: 871: 862: 860: 856: 852: 848: 844: 839: 837: 833: 832: 827: 823: 819: 815: 814: 809: 805: 801: 797: 793: 789: 785: 781: 780: 775: 771: 767: 763: 758: 756: 752: 748: 744: 740: 736: 735: 729: 727: 723: 719: 718: 713: 709: 706: 703:(such as the 702: 698: 694: 690: 687:was named by 686: 681: 679: 675: 671: 667: 663: 659: 658:Louis Agassiz 655: 651: 643: 642: 637: 636:problematicus 635: 630: 625: 616: 614: 610: 605: 603: 602: 597: 593: 589: 584: 582: 578: 574: 570: 565: 563: 559: 555: 551: 547: 543: 539: 535: 531: 526: 524: 523: 518: 514: 513: 508: 504: 500: 499:Late Devonian 496: 486: 485: 481: 477: 476: 472: 462: 451: 437: 435: 429: 427: 423: 419: 415: 411: 407: 401: 398: 397: 391: 389: 385: 381: 377: 373: 369: 365: 361: 358: 354: 350: 349:Pterygotioids 346: 342: 338: 334: 333: 329: 325: 313: 308: 304: 300:Slimonioidea 299: 298: 296: 293: 289: 284: 280: 278: 274: 272: 268: 267: 265: 260: 255: 250: 249: 243: 240: 236: 231: 227: 222: 216: 214:Superfamily: 213: 212: 209: 203: 200: 199: 196: 190: 187: 186: 183: 180: 177: 176: 173: 170: 167: 166: 163: 160: 157: 156: 153: 150: 147: 146: 141: 136: 132: 129: 125: 124: 118: 114: 109: 102: 97: 92: 87: 82: 77: 72: 67: 62: 57: 52: 47: 41: 34: 33:Late Devonian 30: 22: 19: 3473: 3385: 3378: 3371: 3351: 3344: 3337: 3330: 3323: 3316: 3309: 3302: 3295: 3290:Hughmilleria 3288: 3281: 3274: 3267: 3260: 3253: 3246: 3239: 3122:Pterygotidae 3103: 3058:Mixopteridae 3014:Eurypteridae 2889:Stylonuridae 2809: 2800: 2791: 2782: 2773: 2702:the original 2681: 2675: 2622: 2618: 2596: 2572: 2567: 2534: 2530: 2511:: 1080–1108. 2508: 2504: 2494: 2464:(1): 15–18. 2461: 2457: 2447: 2430: 2426: 2374: 2370: 2345: 2337: 2330: 2317: 2287:(1): 13–27. 2284: 2280: 2230: 2226: 2220: 2210: 2163: 2157: 2147: 2100: 2094: 2084: 2041: 2035: 2024: 1983: 1979: 1934: 1914:Hughmilleria 1913: 1911: 1863:Saudi Arabia 1844: 1809: 1806:Distribution 1717: 1716: 1700: 1699: 1676: 1675: 1652: 1651: 1601: 1600: 1584: 1583: 1560: 1559: 1536: 1535: 1505: 1504: 1493:Pterygotidae 1478: 1477: 1454: 1453: 1421: 1420: 1404: 1403: 1380: 1379: 1367: 1354:paraphyletic 1350: 1343: 1339:Hughmilleria 1338: 1335:Hughmilleria 1334: 1332: 1328:sister-group 1323: 1319:Ciurcopterus 1317: 1314: 1308:Hughmilleria 1306: 1300: 1294: 1177:Pterygotidae 1175: 1152: 1151: 1128: 1127: 1106:Hughmilleria 1104: 1103: 1091: 1078: 1056: 1034: 1009: 987: 953: 924: 922: 918: 891: 881:Hughmilleria 880: 874: 858: 843:Leif Størmer 840: 835: 831:Grossopterus 829: 825: 822:Hughmilleria 821: 817: 813:Erettopterus 811: 808:Erettopterus 807: 803: 799: 795: 787: 784:Hughmilleria 783: 777: 773: 769: 759: 751:Hughmilleria 750: 746: 742: 734:Hughmilleria 732: 730: 725: 721: 715: 707: 705:type species 700: 684: 682: 669: 653: 647: 639: 632: 606: 599: 585: 566: 550:Pterygotidae 540:composed of 530:chelicerates 527: 520: 510: 492: 482: 473: 430: 402: 394: 392: 364:sister group 348: 330: 323: 322: 283:Pterygotidae 246: 239:Type species 220: 201:Infraorder: 121: 18: 3498:Wikispecies 3387:Palmichnium 3364:Ichnogenera 3262:Carcinosoma 2956:Eurypterina 2849:Stylonurina 2787:Prosomapoda 2769:Chelicerata 2767:Subphylum: 2745:Eurypterids 2067:10784/26939 1926:South China 1812:Scandinavia 1291:type genera 976:Eurypterina 955:Stylonurina 935:Eurypterida 898:Eurypterina 855:Eurypterina 847:superfamily 708:P. anglicus 641:nomen vanum 577:opisthosoma 554:exoskeleton 503:eurypterine 440:Description 422:South China 384:pterygotids 341:eurypterids 337:superfamily 195:Eurypterida 182:Chelicerata 178:Subphylum: 3535:Categories 3353:Stylonurus 3339:Pterygotus 3318:Mixopterus 3311:Megarachne 3276:Eurypterus 3161:Ordovician 3117:Slimonidae 3028:Infraorder 2805:Dekatriata 2796:Planaterga 2763:Arthropoda 2346:Pterygotus 2339:Formations 1957:References 1907:Antarctica 1296:Pterygotus 836:Pterygotus 804:Pterygotus 800:Curviramus 796:Pterygotus 788:Pterygotus 770:Pterygotus 747:Pterygotus 743:Eurypterus 726:Pterygotus 722:Pterygotus 712:David Page 701:Pterygotus 693:Lesmahagow 670:Pterygotus 654:Pterygotus 650:type genus 634:Pterygotus 609:chelicerae 601:Eurypterus 558:Slimonidae 517:arthropods 484:Pterygotus 480:pterygotid 388:cheliceral 374:and small 357:infraorder 345:arthropods 332:Pterygotus 328:type genus 277:Slimonidae 172:Arthropoda 120:Fossil of 3430:Metastoma 3414:Xiphosura 3404:Arachnida 3191:Geography 2755:Kingdom: 2559:140668235 2551:0022-3360 2486:131539776 2478:0371-6260 2399:1469-5081 2309:1502-3931 2255:0022-3360 2117:1744-9561 2076:198237241 2008:1475-4983 1903:Australia 1847:Australia 1836:Laurentia 896:, in the 818:Hastimima 792:subgenera 779:Hastimima 666:geologist 662:biologist 615:(claws). 548:. In the 534:segmented 487:(bottom). 426:Laurentia 380:slimonids 303:Novojilov 262:Families 230:Ruedemann 158:Kingdom: 152:Eukaryota 3489:Q7257013 3483:Wikidata 3451:Category 3373:Arcuites 3346:Slimonia 3171:Devonian 3166:Silurian 2953:Suborder 2846:Suborder 2823:Taxonomy 2761:Phylum: 2757:Animalia 2407:83835591 2263:46953627 2190:18029297 2135:19828493 2016:84268058 1940:See also 1922:Scotland 1887:Gondwana 1832:Avalonia 1324:Slimonia 1302:Slimonia 1154:Slimonia 859:Slimonia 826:Slimonia 774:Slimonia 717:Slimonia 697:Scotland 678:Scotland 542:proteins 507:carapace 475:Slimonia 471:slimonid 434:carapace 418:Scotland 362:and the 292:Synonyms 168:Phylum: 162:Animalia 148:Domain: 3219:Oceania 3181:Permian 2686:Bibcode 2627:Bibcode 2439:1301554 2379:Bibcode 2289:Bibcode 2281:Lethaia 2235:Bibcode 2181:2412931 2126:2865068 2046:Bibcode 1988:Bibcode 1883:Siberia 1879:Bohemia 1859:Florida 1851:Morocco 1828:Baltica 1820:Britain 810:), but 588:derived 573:prosoma 569:tagmata 538:cuticle 497:to the 390:claws. 366:of the 353:derived 312:Størmer 254:Agassiz 188:Order: 3518:286977 3209:Europe 3199:Africa 2830:Genera 2557:  2549:  2484:  2476:  2437:  2405:  2397:  2307:  2261:  2253:  2188:  2178:  2133:  2123:  2115:  2074:  2014:  2006:  1891:Africa 927:2013. 925:et al. 802:) and 755:family 613:chelae 592:telson 546:chitin 314:, 1974 305:, 1962 256:, 1844 232:, 1912 228:& 226:Clarke 2810:Clade 2801:Clade 2792:Clade 2783:Clade 2774:Clade 2705:(PDF) 2672:(PDF) 2593:(PDF) 2555:S2CID 2482:S2CID 2435:JSTOR 2403:S2CID 2259:S2CID 2072:S2CID 2012:S2CID 1895:India 1871:Paris 1867:China 1855:Libya 596:lance 581:basal 372:basal 3204:Asia 2547:ISSN 2474:ISSN 2395:ISSN 2305:ISSN 2251:ISSN 2186:PMID 2131:PMID 2113:ISSN 2004:ISSN 1924:and 1905:and 1881:and 1822:and 1305:and 824:and 782:and 764:and 664:and 560:and 544:and 420:and 46:PreꞒ 2694:doi 2682:252 2635:doi 2539:doi 2466:doi 2387:doi 2375:143 2297:doi 2243:doi 2176:PMC 2168:doi 2121:PMC 2105:doi 2062:hdl 2054:doi 1996:doi 1909:). 676:of 586:In 416:of 339:of 3537:: 3515:: 3500:: 3485:: 2812:: 2803:: 2794:: 2785:: 2776:: 2692:. 2680:. 2674:. 2647:^ 2633:. 2623:23 2621:. 2617:. 2605:^ 2595:. 2580:^ 2553:. 2545:. 2535:81 2533:. 2529:. 2517:^ 2509:69 2507:. 2503:. 2480:. 2472:. 2460:. 2456:. 2431:38 2429:. 2415:^ 2401:. 2393:. 2385:. 2373:. 2353:^ 2303:. 2295:. 2285:21 2283:. 2271:^ 2257:. 2249:. 2241:. 2231:63 2229:. 2198:^ 2184:. 2174:. 2162:. 2156:. 2137:. 2129:. 2119:. 2111:. 2099:. 2093:. 2070:. 2060:. 2052:. 2042:39 2040:. 2034:. 2010:. 2002:. 1994:. 1984:52 1982:. 1964:^ 1901:, 1897:, 1893:, 1877:, 1873:, 1869:, 1865:, 1861:, 1857:, 1853:, 1849:, 1818:, 1814:, 1299:, 904:, 879:. 820:, 794:; 786:. 776:, 772:, 757:. 728:. 695:, 680:. 656:. 652:, 604:. 564:. 428:. 347:. 96:Pg 40:Ma 35:, 31:– 2737:e 2730:t 2723:v 2696:: 2688:: 2641:. 2637:: 2629:: 2561:. 2541:: 2488:. 2468:: 2462:1 2441:. 2409:. 2389:: 2381:: 2325:" 2311:. 2299:: 2291:: 2265:. 2245:: 2237:: 2192:. 2170:: 2164:4 2141:. 2107:: 2101:6 2078:. 2064:: 2056:: 2048:: 2018:. 1998:: 1990:: 806:( 798:( 644:. 281:† 275:† 269:† 245:† 218:† 205:† 192:† 101:N 91:K 86:J 81:T 76:P 71:C 66:D 61:S 56:O 51:Ꞓ

Index

Early Silurian
Late Devonian
Ma
PreꞒ

O
S
D
C
P
T
J
K
Pg
N

Slimonia acuminata
Senckenberg Museum of Frankfurt
Scientific classification
Edit this classification
Eukaryota
Animalia
Arthropoda
Chelicerata
Eurypterida
Diploperculata
Pterygotioidea
Clarke
Ruedemann
Type species

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