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Dobsonfly

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579:; other courtship rituals remain unknown). Males compete with each other for females, aggressively fluttering the wings and trying to place their long mandibles underneath the body of the opponent in order to flip him into the air. Afterwards, the male approaches a female from the side and touches her with his antennae. At first the female reacts somewhat aggressively, moving the head from side to side with mandibles wide apart. However, she then allows the male to come closer and place his mandibles over her wings in a perpendicular position, a position he holds until the female signals reception to mating. 786: 71: 754: 770: 680: 738: 49: 803: 659:. When they have finally reached maturity, the larvae leave the water and find a rock, log, or anthropogenic debris, typically close to the stream but sometimes up to 40 m away. There they construct a chamber for pupation and spend several days to several weeks as prepupae before shedding the exoskeleton and spending about a week to two weeks as 391:
wrote in his 1897 book Insect Life, "In spite of its disagreeable appearance it is in some respects very interesting to students of Nature study." The larvae, commonly called hellgrammites, are perhaps better known than the adults due to their more readily findable nature. They are unusual in that
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due to their large size, endurance, and ferocious temperament. John Henry Comstock suggested securing a net or wire screen to the rocky bottom of a creek and disturbing the rocks just upstream of the screen as a method to catch the larvae. They often run for relatively high prices at bait shops,
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vary from a grayish to translucent shade, depending on the species, and the anal region of the hindwing is wide and folded at rest. Despite the large wings, adults are weak, fluttery fliers. The body is soft and coloration varies from yellow to dark shades of brown. The body typically does not
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that are eaten by the female partner after mating. This has been shown to be correlated to mandible size; in species where the males have large mandibles the "nuptial gift" is small or absent, while it is large in species where males lack the exaggerated mandibles. Two genera,
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during the daytime. However, they do sometimes form aggregations under bridges or other structures along streams. Since the adults live only about a week, they are not known to eat anything, although they have been reported to drink sweet solution in captivity.
663:. The pupae are yellow-orange with dark spots on the dorsum of the abdomen, covered in minute setae, and exarate (i.e. the developing appendages and mouthparts are attached only at their proximal ends). Although the males have a small tubercle on the 606: in) long and wide. The spermatophore consists of two parts: a large gelatinous mass, and a smaller seminal duct containing the sperm. After copulation, the female proceeds to spread her legs wide apart, curl the abdomen under the chest, and 377:(with exceptions in a few species): quadrate head with a postocular spine, ridge, and plane, non-pectinate antennae, four crossveins between the radius and the radial sector, and distinctive male terminalia with a well developed ninth 535:
midges. Although the larvae spend most of their lives under rocks below water, locals along Virginia and Pennsylvania rivers have reported emergences, known as "hellgrammite crawlings," during thunderstorms.
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sternum and a slightly wider head than the females, the mandibles are not as noticeably divergent as in the adults. Finally, the pupae emerge from the chamber, leaving behind the larval and pupal
322:, a particularly long-mandibled species, these can reach up to 4 cm (1.6 in) in length and are used in competition for females. It is possible that the mandibles may have been 847: 1064:
Borror, Donald; Triplehorn, Charles; and Norman Johnson. An Introduction to the Study of Insects. 6th ed. New York: Harcourt Brace College Publishers, 1989. 358-363.
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larvae either fall directly into the stream or if not, immediately search for water. There the larvae live for up to five years, going through 10-12 instar
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Xing Yue Liu; Ding Yang; Si Qin Ge; Xing Ke Yang (2005). "Phylogenetic review of the Chinese species of Acanthacorydalis (Megaloptera, Corydalidae)".
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which supply plenty of oxygen and stir up prey. They are generalist predators; dissections have revealed that they primarily eat aquatic immatures of
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Stange, Lionel. "Alderflies and Dobsonflies." Encyclopedia of Entomology. 2nd ed. New York: Springer Publishing, 2008.
769: 287: 974:"Is diversification in male reproductive traits driven by evolutionary trade-offs between weapons and nuptial gifts?" 334:. Males cannot use these mandibles to bite because they are too long; on the other hand, females have short, heavily 70: 644: in) wide. This mass is covered by a layer of a chalky, white substance, which probably protects the eggs from 242:
used the word "hellgrammite" for the aquatic larvae they used as bait, but the origin of this term is also unknown.
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Gullan, P. J., and P. S. Cranston. The Insects: An Outline of Entomology. Hoboken, NJ: Wiley Blackwell, 2004. 260.
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Latreille (Megaloptera: Corydalidae). Thomas Say Monographs, Entomological Society of America. Lanham, MD. 360pp.
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within Corydalinae, divided into four lineages. Working from "most basal" to "most derived" lineages, there are:
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mandibles which enable them to deliver powerful bites when threatened. Males of many species will also produce
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leading to over-exploitation in some areas and regulation of sale in certain states. Some anglers instead use
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and overheating. Females tend to deposit egg masses at relatively few sites, resulting in grouped egg masses.
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Although not to the same extent as the larvae of mayflies and caddisflies, hellgrammites are intolerant of
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such as the United States and Canada, with a wingspan of up to 18 cm (7.1 in) in some species of
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Simonsen, T. J., Dombroskie, J. J., and D. D. Lawrie (2008). Behavioral Observations on the Dobsonfly,
1276: 1563: 1300: 397: 1267: 744: 388: 231: 456: 419:. At the end of the abdomen is a pair of claw-like structures. Body color is black or dark brown. 349: 951: 792: 760: 723: 415:
with a pair of terminal hooks used to hold themselves to substrate, and also in that they lack a
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can have a wingspan of up to 21.6 cm (8.5 in), making it the largest dobsonfly and the
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masses containing on average one thousand grey, cylindrical eggs, each egg about 1.5 mm (
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Hall, Donald. Eastern Dobsonfly. Featured Creatures. University of Florida. April 2013.
998: 973: 568: 374: 343: 199: 1204:(Corydalidae: Megaloptera) along a Large River. Journal of Freshwater Ecology 9 57-62. 1086:
Hayashi, Fumio (1989). Radio Tracking and Activity Monitoring of the Dobsonfly Larva,
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Hayashi, Fumio (1992). Large spermatophore production and consumption in dobsonflies
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Adult males of many—but not all—species are easily recognized by their long, curving
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The adults are also nocturnal, and are seldom seen as they hide under leaves in the
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Contreras-Ramos, A. Corydalinae. Tree of Life Web Project. November 15, 1997.
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Comstock, John Henry (1897). Insect Life. Cornell University Library. Online.
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There are about sixty species of dobsonflies. Contreras-Ramos suggests nine
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The larvae of dobsonflies live along the rocky bottoms of streams. Chiefly
17: 1457: 802: 1465: 1425: 1388: 1361: 1178: 1157: 1146:, Megaloptera) on a Large River. American Midland Naturalist 127 348-354. 656: 551:, an indicator additive in natural gas and propane, and may behave as an 520: 471: 335: 211: 1470: 363:
of males are also noticeably elongated, even longer than the mandibles.
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surpass 7.5 cm (3.0 in) in length, although the largest Asian
30:"Corydalinae" redirects here. For the subtribe in the poppy family, see 688: 683:
Hellgrammite (larval form of the dobsonfly) found in a Tennessee stream
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occurs along rocky walls of streams at night, from May to September in
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Contreras-Ramos, Atilano (1998). Systematics of the dobsonfly genus
290:. Examples of species with large-mandibled males include the genera 407:
Larvae of dobsonflies differ from those of their sister clade, the
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Purdue Agriculture News Columns. Purdue Extension. August 8, 2013.
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One to two weeks after oviposition, the eggs hatch and the first
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from larva to adult in dobsonflies is one of the simplest of the
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orders, yet the life cycle begins with an intriguing ritualized
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Xingyue Liu; Fumio Hayashi; Laura C. Lavine; Ding Yang (2015).
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Hayashi, Fumio (1988). Prey selection by the dobsonfly larva,
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used the term in reference to these insects in his 1897 book
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that allow them to take in air directly when above water.
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The Chloroniella lineage, containing the monotypic genus
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although they are generally aquatic, taking in dissolved
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Mangan, Brian (1994). Pupation Ecology of the Dobsonfly
1103:(Megaloptera: Corydalidae). Freshwater Biology 20 19-29. 913:"World's largest aquatic insect specimen found in China" 978:
Proceedings of the Royal Society B: Biological Sciences
588:, during copulation the male attaches to the female's 481:, distributed from Northwest India to Southeast Asia. 1142:
Mangan, Brian (1992). Oviposition of the Dobsonfly (
1415: 707:and may have potential to be used as indicators of 1090:(Megaloptera: Corydalidae). Oecologia 78 468-472. 238:, but did not explain it. He also mentioned that 435:The Protohermes lineage, containing the genera 230:The origin of the word "dobsonfly" is unclear. 1264:. Aquatic Critters. Missouri Botanical Garden. 1055:. Tree of Life Web Project. November 15, 1997. 250:Adult dobsonflies are some of the largest non- 1308: 484:The Corydalus lineage, containing the genera 8: 608:eat the gelatinous part of the spermatophore 463:The Nevromus lineage, containing the genera 1403: 1315: 1301: 1293: 1128:. Japanese Journal of Entomology 60 59-66. 342:in the form of packages of nutrient-rich 47: 38: 1177: 997: 967: 965: 718:, entomologists and collectors often use 330:used by females to evaluate males during 1047: 1045: 1043: 1041: 1039: 1037: 1035: 1033: 839: 837: 396:through abdominal lateral filaments and 819: 733: 887:"Largest aquatic insect (by wingspan)" 369:is distinguished from closely related 283:may reach 10.5 cm (4.1 in). 274:in the world by this measurement. The 210:of dobsonflies are distributed in the 1138: 1136: 1134: 1111: 1109: 827: 825: 823: 7: 1019: 1017: 872: 870: 868: 866: 864: 862: 860: 515:, they ambush prey in the middle of 1156:Walsh, B. D.; Riley, C. V. (2004). 1249:10.1111/j.1365-3113.1981.tb00440.x 547:The dobsonfly may be attracted by 25: 1273:. Tree of Life Web Project. 1997. 948:10.1111/j.1463-6409.2005.00197.x 801: 784: 768: 752: 736: 687:Hellgrammites are popular among 634: in) long and 0.5 mm ( 620:. The females deposit coin-size 555:in the presence of these gases. 156: 69: 32:Papaveraceae § Fumarioideae 700:in the shape of hellgrammites. 451:to Indonesia, China, and Japan. 1: 460:, found only in South Africa. 328:secondary sex characteristics 267:Acanthacorydalis fruhstorferi 716:strongly attracted to lights 1580: 1051:Contreras-Ramos, Atilano. 384:In regards to the larvae, 318:the sexes are similar. In 29: 1376: 1332: 911:Li, Zoe (July 22, 2014). 845:Dobsonflies Look Vicious. 153: 148: 66:Scientific classification 64: 55: 46: 41: 1383:(dobsonflies, fishflies) 1158:"The Hellgrammite Fly ( 726:traps to capture them. 513:active during the night 1282:. Featured Creatures. 990:10.1098/rspb.2015.0247 891:Guinness World Records 777:Nevromus austroindicus 684: 272:largest aquatic insect 1531:Paleobiology Database 1241:Systematic Entomology 1235:Glorioso, M. (1981). 1166:American Entomologist 810:at Wikimedia Commons 682: 27:Subfamily of insects 1277:Eastern dobsonfly, 1101:Protohermes grandis 1088:Protohermes grandis 745:Protohermes grandis 724:mercury-vapor light 447:, distributed from 389:John Henry Comstock 232:John Henry Comstock 1279:Corydalus cornutus 1202:Corydalus cornutus 1179:10.1093/ae/50.1.50 1160:Corydalis cornutus 1144:Corydalus cornutus 1025:Corydalus cornutus 850:2014-10-06 at the 793:Corydalus cornutus 761:Corydalus cornutus 714:As the adults are 685: 592:a large, globular 320:Corydalus cornutus 58:Corydalus cornutus 1546: 1545: 1518:Open Tree of Life 1409:Taxon identifiers 1400: 1399: 1392: 1384: 984:(1807): 373–387. 936:Zoologica Scripta 806:Media related to 596:about 4 mm ( 573:courtship display 507:Diet and behavior 417:terminal filament 400:, they also have 373:by the following 194:(commonly called 163: 162: 16:(Redirected from 1571: 1539: 1538: 1526: 1525: 1513: 1512: 1500: 1499: 1487: 1486: 1474: 1473: 1461: 1460: 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Retrieved 906: 894:. Retrieved 890: 881: 800: 796:hellgrammite 791: 775: 759: 743: 713: 702: 686: 650: 617: 612: 583: 582:At least in 581: 576: 562: 546: 538: 510: 497: 491: 485: 476: 470: 464: 457:Chloroniella 455: 442: 436: 426: 406: 386:entomologist 383: 365: 354: 350:Chloroniella 348: 319: 315: 311: 307: 303: 299: 295: 291: 285: 280: 265: 264:. The Asian 259: 252:Lepidopteran 249: 235: 229: 220:South Africa 202:, living in 195: 182:Megalopteran 177: 165: 164: 154: 142: 56: 36: 1564:Corydalidae 1479:iNaturalist 1447:Corydalinae 1441:Wikispecies 1417:Corydalinae 1325:Megaloptera 1126:Protohermes 843:Turpin, T. 808:Corydalinae 720:black light 665:prothoracic 646:desiccation 614:Oviposition 585:Protohermes 525:caddisflies 478:Neoneuromus 444:Protohermes 423:Systematics 367:Corydalinae 336:sclerotized 316:Protohermes 304:Neoneuromus 302:, while in 254:insects of 246:Description 236:Insect Life 188:Corydalidae 178:Corydalinae 166:Dobsonflies 157:Systematics 143:Corydalinae 139:Subfamily: 133:Corydalidae 123:Megaloptera 18:Corydalinae 1553:Categories 1354:Subclass: 1344:Arthropoda 814:References 559:Life cycle 533:chironomid 529:stoneflies 438:Neurhermes 409:alderflies 379:gonostylus 312:Neurhermes 103:Arthropoda 42:Dobsonfly 1389:Sialidae 1356:Pterygota 1336:Kingdom: 1270:Corydalus 1262:Dobsonfly 1188:2155-9902 1162:, Linn.)" 1075:Corydalus 1053:Corydalus 618:Corydalus 590:genitalia 577:Corydalus 549:mercaptan 499:Corydalus 493:Chloronia 402:spiracles 356:Chloronia 332:courtship 296:Corydalus 288:mandibles 261:Corydalus 226:Etymology 170:subfamily 89:Kingdom: 83:Eukaryota 1466:BugGuide 1455:BioLib: 1432:Q2790845 1426:Wikidata 1362:Neoptera 1342:Phylum: 1338:Animalia 1327:families 1008:25925103 956:84988447 848:Archived 521:mayflies 472:Nevromus 361:antennae 324:selected 308:Nevromus 212:Americas 129:Family: 99:Phylum: 93:Animalia 79:Domain: 1350:Insecta 1348:Class: 1323:Extant 999:4424648 919:June 3, 896:4 April 730:Gallery 689:anglers 639:⁄ 629:⁄ 601:⁄ 517:riffles 413:prolegs 240:anglers 204:streams 200:aquatic 174:insects 149:Genera 119:Order: 113:Insecta 109:Class: 1536:284868 1523:779642 1497:666125 1484:319152 1471:742916 1458:535686 1268:Genus 1186:  1006:  996:  954:  653:instar 541:canopy 531:, and 496:, and 475:, and 429:genera 394:oxygen 371:clades 218:, and 208:genera 198:) are 192:larvae 190:. The 185:family 168:are a 1510:85815 952:S2CID 915:. CNN 698:lures 669:skins 661:pupae 657:molts 276:wings 1505:NCBI 1492:ITIS 1288:IFAS 1184:ISSN 1004:PMID 921:2016 898:2018 722:and 693:bait 675:Uses 563:The 441:and 353:and 314:and 298:and 216:Asia 155:See 1245:doi 1174:doi 994:PMC 986:doi 982:282 944:doi 691:as 622:egg 326:as 172:of 1555:: 1533:: 1520:: 1507:: 1494:: 1481:: 1468:: 1443:: 1428:: 1284:UF 1239:. 1182:. 1170:50 1168:. 1164:. 1133:^ 1108:^ 1032:^ 1016:^ 1002:. 992:. 980:. 976:. 964:^ 950:. 940:34 938:. 889:. 859:^ 836:^ 822:^ 711:. 671:. 641:32 631:16 610:. 527:, 523:, 490:, 469:, 381:. 310:, 306:, 294:, 222:. 214:, 176:, 1316:e 1309:t 1302:v 1286:/ 1251:. 1247:: 1190:. 1176:: 1010:. 988:: 958:. 946:: 923:. 900:. 637:1 627:1 603:8 599:1 34:. 20:)

Index

Corydalinae
Papaveraceae § Fumarioideae

Corydalus cornutus
Scientific classification
Edit this classification
Eukaryota
Animalia
Arthropoda
Insecta
Megaloptera
Corydalidae
Corydalinae
Systematics
subfamily
insects
Megalopteran
family
Corydalidae
larvae
aquatic
streams
genera
Americas
Asia
South Africa
John Henry Comstock
anglers
Lepidopteran
temperate zones

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