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New findings on life history traits of Xenos peckii (Strepsiptera: Xenidae)

  • M. Hrabar (a1), A. Danci (a1), S. McCann (a1), P.W. Schaefer (a2) and G. Gries (a1)...

We studied life history traits of Xenos peckii Kirby (Strepsiptera: Xenidae), a little-known parasite of the paper wasp Polistes fuscatus (Fabricus) (Hymenoptera: Vespidae) in North America. We field-collected 24 wasp nests in early July 2012, isolated parasitised wasps, tracked life history events of X. peckii, and recorded such behaviour as emergence of males and mating by normal-speed and high-speed cinematography. To emerge, males first cut the puparium with their mandibles along an ecdysial suture line, and then push aside the pupal cap during emergence. The endoparasitic females engage in active calling (pheromone release) behaviour by slowly inflating their cephalothorax, and then extruding it even farther out of, and tilting it away from, the host wasp abdomen. Seasonal and diel (afternoon) emergence periods of males coincide with seasonal and diel receptivity and calling periods of females. Males approach calling females in a swaying flight with smooth turns. They typically land on the anterior portion of the host wasp's abdomen, and then step backward until they make contact with the cephalothorax of the female. As soon as their mesothoracic legs contact the female's cephalothorax, they curl around it, and the male initiates mating. Thereafter, the female fully retreats and never re-mates.


Nous avons étudié des caractéristiques du cycle biologique de Xenos peckii Kirby (Strepsiptera: Xenidae), un parasite mal connu de la guêpe à papier Polistes fuscatus (Fabricius) (Hymenoptera: Vespidae) en Amérique du Nord. Nous avons récolté 24 nids de guêpes en nature au début de juillet 2012, isolé les guêpes parasitées, suivi les étapes du cycle biologique de X. peckii et enregistré certains comportements, tels que l’émergence des mâles et l'accouplement, par cinématographie à vitesse normale et à haute vitesse. À l’émergence, les mâles coupent d'abord le puparium avec leurs mandibules le long de la ligne de déhiscence et poussent ensuite de côté la calotte de la pupe. Les femelles endoparasites entreprennent des comportements actifs d'appel (par émission de phéromones) en gonflant lentement leur céphalothorax, l'extirpant encore plus vers l'extérieur et le faisant pivoter loin de l'abdomen de la guêpe hôte. Les périodes d’émergence saisonnières et journalières (en après-midi) des mâles coïncident avec les périodes saisonnières et journalières de réceptivité et d'appel des femelles. Les mâles s'approchent des femelles en appel en un vol sinueux à virages en douceur. Ils se posent typiquement sur la partie antérieure de l'abdomen de la guêpe hôte et reculent jusqu’à ce qu'ils entrent en contact avec le céphalothorax de la femelle. Dès que les pattes mésothoraciques du mâle touchent le céphalothorax de la femelle, elles se replient autour de lui et le mâle commence l'accouplement. Ensuite, la femelle se retire totalement et ne s'accouple plus.

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Beani L. 2006. Crazy wasps: when parasites manipulate the Polistes phenotype. Annales Zoologici Fennici, 43: 546574.
Beani L., Dallai R., Mercati D., Guisti F., Cappa F., Manfredini F. 2011. When a parasite breaks all the rules of a colony: morphology and fate of wasps infected by a Strepsipteran endoparasite. Animal Behaviour, 82: 13051312.
Beani L., Guisti F., Mercati D., Lupetti P., Paccagnini E., Turillazzi S., et al. 2005. Mating of Xenos vesparum (Rossi) (Strepsiptera, Insecta) revisited. Journal of Morphology, 265: 291303.
Beutel H.G., Pohl H., Hünfeld F. 2005. Strepsipteran brains and effects of miniaturization (Insecta). Arthropod Structure & Development, 34: 305313.
Bohart R.M. 1941. A revision of the Strepsiptera with special reference to the species of North America. Volume 7. University of California Publications in Entomology. Pp. 91–160.
Brues C.T. 1905. Notes on the life history of the Stylopidae. Biological Bulletin, 8: 290295.
Bushbeck E., Ehmer B., Hoy R. 1999. Chunk versus point sampling: visual imaging in a small insect. Science, 286: 11781180.
Bushbeck E., Ehmer B., Hoy R. 2003. The unusual visual system of the Strepsiptera: external eye and neuropils. Journal of Comparative Physiology A–Neuroethology, Sensory Neural, and Behavioral Physiology, 189: 617630.
Cvačka J., Jiroš P., Kalinová B., Straka J., Černá K., Šebesta P., et al . 2012. Stylopsal: the first identified female-produced sex pheromone of Strepsiptera. Journal of Chemical Ecology, 38: 14831491.
Dallai R., Lupetti P., Giusti F., Mercati E., Paccagnini E., Turillazzi S., et al . 2004. Fine structure of the Nassonow's gland in the neotenic endoparasite of female Xenos vesparum (Rossi) (Strepsiptera, Insecta). Tissue and Cell, 36: 211220.
Dapporto L., Cini A., Palagi M., Simonti A., Turillazzi S. 2007. Behaviour and chemical signature of pre-hibernating females of Polistes dominulus infected by the Strepsipteran Xenos vesparum . Parasitology, 134: 545552.
Dubitzky A. 2001. Die äußere Morphologie von Xenos vesparum im REM (Strepsiptera Stylopidae). Mitteilungen der Münchner Entomologischen Gesellschaft, 91: 7176.
Fitzpatrick S.M., Gries R., Khaskin G., Peach D.A.H., Iwanski J., Gries G. 2013. Populations of the gall midge Dasineura oxycoccana on cranberry and blueberry produce and respond to different sex pheromones. Journal of Chemical Ecology, 39: 3749.
Hayward A., McMahon D.P., Kathirithamby J. 2011. Cryptic diversity and female host specificity in a parasitoid where the sexes utilize hosts from separate orders. Molecular Ecology, 20: 15081528.
Henderickx H. 2008. Faunistische Bemerkingen over Strepsiptera met onderzoek van een populatie Halictophagus silwoodensis (Halictopagidae) in het Nationaal Park Hoge Kempen (Maasmechelen). Phegea, 36: 103107.
Hubbard H.G. 1892. The life history of Xenos . The Canadian Entomologist, 24: 257262.
Hughes H.G., Kathirithamby J., Turillazzi S., Beani L. 2004. Social wasps desert the colony and aggregate outside if parasitized: parasite manipulation? Behavioral Ecology, 6: 10371043.
Kathirithamby J. 1983. The mode of emergence of the adult male Elenchus tenuicornis (Kirby) (Strepsiptera, Elenchidae) from its puparium. Zoological Journal of the Linnean Society, 77: 97102.
Kathirithamby J. 1989. Review of the order Strepsiptera. Systematic Entomology, 14: 4192.
Kathirithamby J. 2005. Further homage to Santa Rosalia: discovery at last of the elusive females of a species of Myrmecolacidae (Strepsiptera: Insecta). In Narrow roads of gene land: collected papers by W.D. Hamilton. Volume III . Edited by M. Ridley, Oxford University Press, New York, United States of America. Pp. 117134.
Kathirithamby J. 2009. Host-parasitoid associations in Strepsiptera. Annual Review of Entomology, 54: 227249.
Kathirithamby J., Carcuypino M., Mazzini M. 1990. Ovarian structure in the order Strepsiptera. Frustula Entomologica, 13: 18.
Kathirithamby J., Hamilton W.D. 1992. More covert sex: the elusive females of Myrmecolacidae. Trends in Ecology & Evolution, 7: 349351.
Kathirithamby J., Hayward A., McMahon D.P., Ferreira R.S., Andreazze R., Almeida Andrade H.T.D., et al. 2010. Conspecifics of a heterotrophic heteronomous species of Strepsiptera (Insecta) are matched by molecular characterization. Systematic Entomology, 35: 234242.
Kathirithamby J., Hughes D. 2006. Description and biological notes of the first species of Xenos (Strepsiptera: Stylopidae) parasitic in Polistes carnifex F. (Hymenoptera: Vespidae) in Mexico. Zootaxa, 1104: 3545.
Kathirithamby J., Luke B.M., Neville C. 1990. The ultrastructure of the preformed ecdysial ‘line of weakness’ in the puparium cap of Elenchus tenuicornis (Kirby) (Insecta: Strepsiptera). Zoological Journal of the Linnean Society, 98: 229236.
Kinzelbach R.K. 1967. Zur Kopfmorphologie der Fächerflügler (Strepsiptera, Insecta). Zoologische Jahrbücher (Anatomie), 84: 559684.
Kinzelbach R.K. 1971. Comparative morphology of the Strepsiptera and its phylogenetic interpretation (Insecta, Strepsiptera). Zoologica (Stuttgart), 41 (Pts 1 and 2), 1256.
Lauterbach G. 1954. Begattung und Larvengeburt bei den Strepsipteren. Zugleich ein Beitrag zur Anatomie der Stylops-Weibchen. Zeitschrift für Parasitenkunde, 16: 255297.
Manfredini F., Guisti F., Beani L., Dallai L. 2007. Developmental strategy of the endoparasite Xenos vesparum (Strepsiptera: Insecta): invasion into the host and elusion of its defense reaction. Journal of Morphology, 268: 588601.
McNeil J.N. 1991. Behavioral ecology of pheromone-mediated communication in moths and its importance in the use of pheromone traps. Annual Review of Entomology, 36: 407430.
Muir F. 1906. Notes on some Fijian insects. Volume 2, Honolulu Experiment Station Hawaiian Sugar Planters’ Association. Division of Entomology. Pp. 1–11.
Nakase Y., Kato M. 2013. Cryptic diversity and host specificity in giant Xenos Strepsipterans parasitic in large Vespa hornets. Zoological Science, 30: 331336.
Nassonow N.V. 1892. Development of Xenos rossii (systematic position of the group). Congress of Zoology, 1: 174184.
Osswald J., Pohl H., Beutel R.G. 2010. Extremely miniaturized and highly complex: the thoracic morphology of the first instar larva of Mengenilla chbouti (Insecta, Strepsiptera). Arthropod Structure and Development, 39: 287304.
Pierce W.D. 1909. A monographic revision of the twisted winged insects comprising the order Strepsiptera Kirby. Bulletin of the United States National Museum, 66: 1232.
Pohl H., Beutel G. 2004. Fine structure of adhesive devices of Strepsiptera (Insecta). Arthropod Structure & Development, 33: 3143.
Pohl H., Beutel G. 2008. The evolution of Strepsiptera. Zoology, 111: 318338.
Reynolds S. 2013. Postembryonic development. In The insects: structure and function, 5th edition . Edited by S.J. Simpson and A.E. Douglas, Cambridge University Press, Cambridge, United Kingdom. Pp. 298454.
Ringo J. 1996. Sexual receptivity in insects. Annual Review of Entomology, 41: 473494.
Rösch P. 1913. Beiträge zur Kenntnis der Entwicklungsgeschichte der Strepsipteren. Jenaische Zeitschrift für Naturwissenchaften, 50: 97146.
Salt G. 1927. The effects of stylopization on Aculeate Hymenoptera. Journal of Experimental Zoology, 48: 223331.
Salt G. 1931. A further study of the effects of stylopization. Journal of Experimental Zoology, 59: 133166.
Schrader S.H. 1924. Reproduction of Achroschismus wheeleri Pierce. Journal of Morphology and Physiology, 39: 157197.
Srdjan M., Layne J.E., Bushbeck E.K. 2007. Behavioral evidence for within-eyelet resolution in twisted-winged insects (Strepsiptera). Journal of Experimental Biology, 210: 28192828.
Strohm K. 1910. Die zusammengesetzten Augen der Männchen von Xenos rossi . Zoologischer Anzeiger, 36: 156159.
Tolasch T., Kehl S., Dötterl S. 2012. First sex pheromone of the order Strepsiptera: (3R,5R,9R)-3,5,9-trimethyldodecanal in Stylops melittae Kirby, 1802. Journal of Chemical Ecology, 38: 14931503.
Wachmann E. 1972. Zum Feinbau des Komplexauges von Stylops spec. (Insecta, Strepsiptera). Zeitschrift für Zellforschung und Mikroskopische Anatomie, 123: 411424.
Waloff N. 1981. The life history and descriptions of Halictophagus silwoodensis sp. n. (Strepsiptera) and its host Ulopa reticulata (Cicadellidae) in Britain. Systematic Entomology, 6: 103113.
Williams J.R. 1957. The sugar-cane Delphacidae and their natural enemies in Mauritius. Transactions of the Royal Entomological Society of London, 109: 65110.
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