Knowledge (XXG)

Epigyne

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262: 198: 214: 475: 32: 230: 246: 24: 676: 382: 364: 99: 129:. In this species, the plate is depressed or furrowed longitudinally, and the depressed area is divided by a ridge-like elevation, which divides the depression into two furrows or channels, each of which leads to the opening of the spermatheca of the corresponding side. This ridge-like elevation is called the 78:
of the male during copulation. The various specific forms of epigynes are correlated, in each case, with corresponding specific differences in the palpus of the male. This specialization prevents individuals of different species from mating. The epigyne covers or accompanies the openings of the
133:, as its function "seems clearly to be that of a guide to the male embolus, controlling the course of the latter and facilitating its entrance to the spermatheca." In many cases the guide extends laterally on each side at its posterior end. This is true to a slight extent in the epigyne of 187:), where the ovipositor consists of two finger-like projections: first, the more common one, the scape, which arises from the atriolum, and consequently in front of the opening of the oviduct; and second, one which arises behind the opening of the oviduct; this is termed the 54:. As the epigyne varies greatly in form in different species, even in closely related ones, it often provides the most distinctive characteristic for recognizing species. It consists of a small, hardened portion of the 123:. It consists of a nearly plain plate, with the openings of the spermathacae near the posterior lateral corners. A somewhat more complicated form is illustrated by the epigyne of 83:, which are pouches for receiving and retaining sperm. Frequently, the openings of the spermathecae are on the outer face of the epigyne and can be easily seen. 261: 172:. The basal plate of the epigyne which bears the scape, and which forms a porch or hood that covers the opening of the oviduct is called the 414: 197: 516: 168:. When there is a well-developed scape, the tip of it is usually more or less spoon-shaped. This part of the scape is termed the 630: 213: 474: 511: 229: 245: 464: 407: 35:
The internal anatomy of a spider, with the reproductive system (purple) reaching the exoskeleton at the epigyne
705: 204: 55: 454: 125: 160:, where there is developed an appendage which is usually soft and flexible, and which is termed the 145:, where the lateral expansions often conceal the openings of the spermathecae, as in the epigyne of 700: 439: 400: 386: 220: 449: 348: 236: 63: 59: 679: 338: 330: 31: 23: 191:. Each of these projections may be grooved on the side facing the oviduct, forming a tube. 640: 609: 483: 459: 444: 274: 252: 147: 119: 661: 526: 17: 694: 625: 549: 534: 506: 501: 491: 368: 352: 343: 16:
This article is about the Epigynum in spiders. For use of Epigynous in botany, see
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A still more complicated form of epigyne is found in some of the sheet weavers (
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Chamberlin, R. V. (1904). "Notes on Generic Characters in the Lycosidae".
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A more complicated form of epigyne is found in spiders of the genus
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This article incorporates text from this source, which is in the
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The primary function of the epigyne is to receive and direct the
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The external anatomy of a spider, with the epigyne labeled
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located on the underside of the abdomen, in front of the
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An example of a comparatively simple epigyne is that of
649: 618: 525: 482: 430: 310:. Doubleday, Page & Company. pp. 129–132. 139:, but more markedly so in that of many species of 408: 86:A secondary function of the epigyne is as an 8: 50:is the external genital structure of female 39:External genital structure of female spiders 415: 401: 393: 301: 299: 297: 295: 293: 291: 342: 97: 287: 193: 102:Three different types of epigyne: (a) 7: 14: 675: 674: 473: 380: 362: 260: 244: 228: 212: 196: 306:Comstock, John Henry (1920) . 1: 512:List of families of spiders 722: 15: 670: 471: 517:Lists of spider species 344:2027/hvd.32044107169518 329:(5): 145–148, 173–178. 205:Paraphidippus aurantius 371:: The Spider Book 114: 36: 28: 323:Canadian Entomologist 101: 34: 26: 389:at Wikimedia Commons 126:Trabeops aurantiacus 108:Trabeops aurantiacus 631:Cultural depictions 221:Hakka himeshimensis 183:) and orb weavers ( 94:Differences in form 335:10.4039/Ent36145-5 115: 37: 29: 688: 687: 619:Human interaction 385:Media related to 237:Colonus puerperus 64:epigastric plates 60:epigastric furrow 713: 678: 677: 477: 417: 410: 403: 394: 384: 366: 365: 357: 356: 346: 318: 312: 311: 303: 264: 248: 232: 216: 200: 62:and between the 721: 720: 716: 715: 714: 712: 711: 710: 691: 690: 689: 684: 666: 662:Web decorations 645: 641:Spider fighting 614: 610:Urticating hair 560:Cheliceral fang 521: 478: 469: 426: 421: 377: 363: 360: 320: 319: 315: 308:The Spider Book 305: 304: 289: 285: 278: 275:Isopeda villosa 265: 256: 253:Hentzia chekika 249: 240: 233: 224: 217: 208: 201: 148:Geolycosa pikei 120:Pirata montanus 112:Geolycosa pikei 104:Pirata montanus 96: 72: 40: 21: 12: 11: 5: 719: 717: 709: 708: 706:Spider anatomy 703: 693: 692: 686: 685: 683: 682: 671: 668: 667: 665: 664: 659: 653: 651: 647: 646: 644: 643: 638: 633: 628: 622: 620: 616: 615: 613: 612: 607: 602: 597: 592: 587: 582: 577: 572: 567: 562: 557: 552: 547: 542: 537: 531: 529: 523: 522: 520: 519: 514: 509: 504: 499: 494: 488: 486: 480: 479: 472: 470: 468: 467: 462: 460:Classification 457: 452: 447: 442: 436: 434: 428: 427: 422: 420: 419: 412: 405: 397: 391: 390: 376: 375:External links 373: 359: 358: 313: 286: 284: 281: 280: 279: 272:sp., probably 266: 259: 257: 250: 243: 241: 234: 227: 225: 218: 211: 209: 202: 195: 95: 92: 71: 68: 38: 18:Ovary (botany) 13: 10: 9: 6: 4: 3: 2: 718: 707: 704: 702: 699: 698: 696: 681: 673: 672: 669: 663: 660: 658: 655: 654: 652: 648: 642: 639: 637: 634: 632: 629: 627: 626:Arachnophobia 624: 623: 621: 617: 611: 608: 606: 603: 601: 598: 596: 593: 591: 588: 586: 583: 581: 578: 576: 573: 571: 568: 566: 563: 561: 558: 556: 553: 551: 550:Cephalothorax 548: 546: 543: 541: 538: 536: 535:Arthropod leg 533: 532: 530: 528: 524: 518: 515: 513: 510: 508: 507:Opisthothelae 505: 503: 502:Mygalomorphae 500: 498: 495: 493: 492:Araneomorphae 490: 489: 487: 485: 481: 476: 466: 463: 461: 458: 456: 453: 451: 448: 446: 443: 441: 438: 437: 435: 433: 429: 425: 418: 413: 411: 406: 404: 399: 398: 395: 388: 383: 379: 378: 374: 372: 370: 369:public domain 354: 350: 345: 340: 336: 332: 328: 324: 317: 314: 309: 302: 300: 298: 296: 294: 292: 288: 282: 277: 276: 271: 270: 263: 258: 255: 254: 247: 242: 239: 238: 231: 226: 223: 222: 215: 210: 207: 206: 199: 194: 192: 190: 186: 182: 177: 175: 171: 167: 163: 159: 158: 152: 150: 149: 144: 143: 138: 137: 132: 128: 127: 122: 121: 113: 109: 105: 100: 93: 91: 89: 84: 82: 77: 69: 67: 65: 61: 57: 53: 49: 45: 33: 25: 19: 569: 361: 326: 322: 316: 307: 273: 267: 251: 235: 219: 203: 188: 178: 173: 169: 165: 161: 155: 153: 146: 140: 134: 130: 124: 118: 116: 111: 107: 103: 85: 81:spermathecae 76:palpal organ 73: 47: 43: 41: 636:Spider bite 590:Palpal bulb 580:Opisthosoma 545:Calamistrum 450:Cannibalism 432:Arachnology 181:Linyphiidae 56:exoskeleton 701:Sex organs 695:Categories 657:Spider web 555:Chelicerae 497:Mesothelae 440:Ballooning 283:References 166:ovipositor 88:ovipositor 605:Spinneret 565:Cribellum 540:Book lung 455:Evolution 185:Araneidae 142:Geolycosa 70:Functions 680:Category 595:Scopulae 585:Pedipalp 484:Taxonomy 465:Glossary 445:Behavior 353:86615684 174:atriolum 170:cochlear 136:Trabeops 48:epigynum 575:Exuviae 570:Epigyne 527:Anatomy 424:Spiders 387:Epigyne 269:Isopeda 189:parmula 157:Araneus 52:spiders 44:epigyne 351:  110:, (c) 106:, (b) 349:S2CID 162:scape 131:guide 650:Webs 600:Silk 42:The 339:hdl 331:doi 164:or 46:or 697:: 347:. 337:. 327:36 325:. 290:^ 176:. 151:. 90:. 66:. 416:e 409:t 402:v 355:. 341:: 333:: 20:.

Index

Ovary (botany)


spiders
exoskeleton
epigastric furrow
epigastric plates
palpal organ
spermathecae
ovipositor

Pirata montanus
Trabeops aurantiacus
Trabeops
Geolycosa
Geolycosa pikei
Araneus
Linyphiidae
Araneidae
Paraphidippus aurantius
Paraphidippus aurantius
Hakka himeshimensis
Hakka himeshimensis
Colonus puerperus
Colonus puerperus
Hentzia chekika
Hentzia chekika
Isopeda sp., probably Isopeda villosa
Isopeda
Isopeda villosa

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