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is distinguished by its small size, compound eyes with axes converging anteriorly on a subtrapezoid to subpentagonal prosoma (head). All of its legs are walking legs; the first three pairs are short with spines, except when modified into clasping organs; the last two pairs are moderately long, keeled
349:
Kjellesvig-Waering (1966) concluded that "there is no other genus that warrants comparison, or, indeed at our present state of knowledge, reveals any close affinities with this very unusual genus", though the genus was able to be classified as a
448:
Dunlop, J. A., Penney, D. & Jekel, D. 2015. A summary list of fossil spiders and their relatives. In World Spider
Catalog. Natural History Museum Bern, online at
1354:
329:
and tapering in width to terminal claws. The last leg falls short of the penultimate abdominal segment. The abdomen is narrow and ends in a short styliform
418:
James C. Lamsdell, Simon J. Braddy & O. Erik Tetlie (2010). "The systematics and phylogeny of the
Stylonurina (Arthropoda: Chelicerata: Eurypterida)".
1341:
1428:
1052:
1042:
564:
509:
420:
1004:
362:. Lamsdell et al. (2010) classified it as the most basal of the rhenopterids and a sister taxon to more derived rhenopterids (such as
1418:
1019:
479:
1408:
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1047:
989:
1423:
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1027:
981:
480:"Page:A Revision of the Families and Genera of the Stylonuracea (Eurypterida).djvu/17 - Wikisource, the free online library"
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505:"The systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida)"
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381:
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53:
1258:
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1232:
591:
170:
150:
93:
37:
285:. It is one of the earliest known eurypterids, having been recovered from
1311:
1201:
1174:
83:
78:
63:
58:
48:
1346:
467:
Treatise on
Invertebrate Paleontology, Part P Arthropoda 2, Chelicerata
98:
73:
585:
330:
160:
1288:
312:
294:
503:
James C. Lamsdell, Simon J. Braddy & O. Erik Tetlie (2010).
1292:
546:
354:. In later years, further similarities have been noted between
542:
297:. Though other species have been assigned to it in the past,
454:
http://www.wsc.nmbe.ch/resources/fossils/Fossils16.0.pdf
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301:
is today recognized as containing one valid species,
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7:
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510:Journal of Systematic Palaeontology
421:Journal of Systematic Palaeontology
14:
1275:
1274:
971:
384:
137:
1264:Timeline of eurypterid research
465:Størmer, L. 1955. Merostomata.
16:Extinct genus of sea scorpions
1:
1429:Fossil taxa described in 1951
260:Brachyopterus stubblefieldi
127:Brachyopterus stubblefieldi
1445:
277:is a genus of prehistoric
1272:
969:
666:List of eurypterid genera
580:
524:10.1080/14772011003603564
434:10.1080/14772011003603564
254:
247:
134:Scientific classification
132:
124:
115:
23:
1419:Fossils of Great Britain
1409:Ordovician eurypterids
322:
1424:Eurypterids of Europe
1381:Paleobiology Database
337:date from the Middle
316:
400:List of eurypterids
392:Paleontology portal
317:Size comparison of
794:Onychopterelloidea
450:http://wsc.nmbe.ch
323:
321:with a human hand.
125:Reconstruction of
1396:
1395:
1368:Open Tree of Life
1295:Taxon identifiers
1286:
1285:
967:
966:
963:
962:
959:
958:
915:Adelophthalmoidea
897:Waeringopteroidea
869:Carcinosomatoidea
802:Onychopterellidae
777:
776:
484:en.wikisource.org
287:Middle Ordovician
270:
269:
243:
31:Middle Ordovician
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1389:
1388:
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1252:Related articles
1209:Merostomichnites
975:
923:Adelophthalmidae
905:Waeringopteridae
877:Carcinosomatidae
865:
848:Strobilopteridae
790:
764:Hibbertopteridae
713:Parastylonuridae
683:
656:
567:
560:
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536:
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494:
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491:
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476:
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416:
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389:
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319:B. stubblefieldi
303:B. stubblefieldi
257:
238:
231:
218:
205:
192:
142:
141:
120:
110:
40:
29:Temporal range:
21:
1444:
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1331:
1330:
1325:
1316:
1315:
1310:
1297:
1287:
1282:
1268:
1247:
1238:Chasmataspidida
1221:
1187:
1084:Campylocephalus
1057:
1014:
976:
955:
941:Hughmilleriidae
927:
909:
891:
882:Megalograptidae
858:
852:
838:Dolichopteridae
824:
812:Moselopteroidea
806:
783:
773:
759:Drepanopteridae
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741:Hardieopteridae
728:Kokomopteroidea
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699:
676:
670:
647:
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541:
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452:, version 16.0
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27:
17:
12:
11:
5:
1442:
1440:
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1421:
1416:
1414:Rhenopteroidea
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1401:
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1323:
1307:
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1226:Related groups
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1222:
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1212:
1205:
1197:
1195:
1189:
1188:
1186:
1185:
1178:
1171:
1164:
1157:
1154:Onychopterella
1150:
1143:
1136:
1129:
1122:
1115:
1112:Hibbertopterus
1108:
1101:
1094:
1087:
1080:
1073:
1070:Adelophthalmus
1065:
1063:
1062:Notable genera
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1035:
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1024:
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1016:
1015:
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965:
964:
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960:
957:
956:
954:
953:
948:
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933:Pterygotioidea
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928:
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908:
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862:
860:Diploperculata
854:
853:
851:
850:
845:
840:
834:
832:
826:
825:
823:
822:
820:Moselopteridae
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814:
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779:
778:
775:
774:
772:
771:
766:
761:
755:
753:
747:
746:
744:
743:
738:
736:Kokomopteridae
732:
730:
724:
723:
721:
720:
715:
709:
707:
701:
700:
698:
697:
691:
689:
687:Rhenopteroidea
680:
672:
671:
669:
668:
662:
660:
653:
649:
648:
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645:
636:
627:
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409:
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346:
345:Classification
343:
310:
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281:of the family
268:
267:
264:
252:
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28:
15:
13:
10:
9:
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4:
3:
2:
1441:
1430:
1427:
1425:
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1417:
1415:
1412:
1410:
1407:
1406:
1404:
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1382:
1378:
1374:
1369:
1365:
1361:
1356:
1352:
1348:
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1339:
1334:
1333:Brachyopterus
1328:
1324:
1319:
1313:
1309:
1308:
1306:
1304:
1303:Brachyopterus
1300:
1296:
1291:
1281:
1271:
1265:
1262:
1260:
1257:
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1250:
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1236:
1234:
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1228:
1224:
1218:
1217:
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1204:
1203:
1199:
1198:
1196:
1194:
1190:
1184:
1183:
1179:
1177:
1176:
1172:
1170:
1169:
1165:
1163:
1162:
1161:Pentecopterus
1158:
1156:
1155:
1151:
1149:
1148:
1144:
1142:
1141:
1137:
1135:
1134:
1133:Megalograptus
1130:
1128:
1127:
1126:Jaekelopterus
1123:
1121:
1120:
1116:
1114:
1113:
1109:
1107:
1106:
1102:
1100:
1099:
1098:Drepanopterus
1095:
1093:
1092:
1088:
1086:
1085:
1081:
1079:
1078:
1077:Brachyopterus
1074:
1072:
1071:
1067:
1066:
1064:
1060:
1054:
1053:South America
1051:
1049:
1046:
1044:
1043:North America
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1039:
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1031:
1029:
1026:
1025:
1023:
1021:
1017:
1011:
1008:
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1005:Carboniferous
1003:
1001:
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863:
861:
855:
849:
846:
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841:
839:
836:
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833:
831:
830:Eurypteroidea
827:
821:
818:
817:
815:
813:
809:
803:
800:
799:
797:
795:
791:
788:
786:
780:
770:
769:Mycteroptidae
767:
765:
762:
760:
757:
756:
754:
752:
751:Mycteropoidea
748:
742:
739:
737:
734:
733:
731:
729:
725:
719:
716:
714:
711:
710:
708:
706:
705:Stylonuroidea
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696:
695:Rhenopteridae
693:
692:
690:
688:
684:
681:
679:
673:
667:
664:
663:
661:
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643:Sclerophorata
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637:
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631:
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619:
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613:
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607:Euchelicerata
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382:
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375:
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372:
367:
366:
361:
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356:Brachyopterus
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335:Brachyopterus
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326:Brachyopterus
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299:Brachyopterus
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284:
283:Rhenopteridae
280:
276:
275:
274:Brachyopterus
265:Størmer, 1951
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261:
253:
250:
246:
241:
236:
235:
234:Brachyopterus
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225:
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26:
25:Brachyopterus
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19:
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1119:Hughmilleria
1117:
1110:
1103:
1096:
1089:
1082:
1076:
1075:
1068:
951:Pterygotidae
887:Mixopteridae
843:Eurypteridae
718:Stylonuridae
638:
629:
620:
611:
602:
517:(1): 49–61.
514:
508:
498:
487:. Retrieved
483:
474:
469:, pp. 36–37.
466:
461:
428:(1): 49–61.
425:
419:
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369:
365:Kiaeropterus
363:
360:rhenopterids
355:
348:
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289:deposits in
273:
272:
271:
259:
258:
249:Type species
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232:
126:
24:
18:
1327:Wikispecies
1216:Palmichnium
1193:Ichnogenera
1091:Carcinosoma
785:Eurypterina
678:Stylonurina
616:Prosomapoda
598:Chelicerata
596:Subphylum:
574:Eurypterids
371:Rhenopterus
352:stylonurine
309:Description
194:Eurypterida
181:Chelicerata
177:Subphylum:
1403:Categories
1182:Stylonurus
1168:Pterygotus
1147:Mixopterus
1140:Megarachne
1105:Eurypterus
990:Ordovician
946:Slimonidae
857:Infraorder
634:Dekatriata
625:Planaterga
592:Arthropoda
489:2017-12-14
406:References
339:Ordovician
279:eurypterid
171:Arthropoda
1259:Metastoma
1243:Xiphosura
1233:Arachnida
1020:Geography
584:Kingdom:
157:Kingdom:
151:Eukaryota
36:460
1318:Q4953501
1312:Wikidata
1280:Category
1202:Arcuites
1175:Slimonia
1000:Devonian
995:Silurian
782:Suborder
675:Suborder
652:Taxonomy
590:Phylum:
586:Animalia
533:85398946
378:See also
358:and the
213:Family:
167:Phylum:
161:Animalia
147:Domain:
1373:3581720
1360:1443133
1347:4650072
1048:Oceania
1010:Permian
240:Størmer
226:Genus:
187:Order:
105:↓
1038:Europe
1028:Africa
659:Genera
531:
456:(PDF).
331:telson
242:, 1951
1386:18954
1355:IRMNG
639:Clade
630:Clade
621:Clade
612:Clade
603:Clade
529:S2CID
295:Wales
1342:GBIF
1033:Asia
368:and
44:PreꞒ
519:doi
430:doi
374:).
1405::
1383::
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441:^
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341:.
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305:.
293:,
94:Pg
38:Ma
33:,
566:e
559:t
552:v
535:.
521::
515:8
492:.
436:.
432::
426:8
256:†
230:†
217:†
204:†
191:†
99:N
89:K
84:J
79:T
74:P
69:C
64:D
59:S
54:O
49:Ꞓ
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