Publication director:
 Serge Kreiter
 kreiter@supagro.inra.fr

  •   © Acarologia, 2009-2014

    Webmaster:
     Alain Migeon
     migeon@supagro.inra.fr

  • CBGP Home page
  •  
  •  ISSN:
     print: 0044-586-X
     online: 2107-7207

    The missing stase in spider mites (Acari: Tetranychidae): when the adult is not the imago.

    Andre H.M. and Van Impe G.

    2012 - Volume: 52 Issue: 1 pages: 3-16

    DOI: 10.1051/acarologia/20122038

    Date received: 2011-08-10, Date accepted: 2012-02-10, Date published: 2012-03-30



     PDF ( 1.57 Mo)  | Export this citation as RIS  to view with Endnote


    Keywords: Tetranychus urticae, ontogeny, ontogenetic trajectory, paedogenesis, stase, state, instar, respiration

    Apart from a calyptostatic prelarva, the ontogeny of spider mites is limited to one six-legged immature followed by three eight-legged instars. The usage consists in naming them: larva, protonymph, deutonymph and adult. In this study, the "missing stase" and different associated hypotheses are explored using diverse approaches: light microscopy, electronic microscopy, comparative chaetotaxy, ontogenetic trajectories, and interspecific comparisons. It turns out that the imago (new name for the last stase) is missing in Tetranychus urticae and that its post-embryonic development may be summarized as follows: prelarva (calyptostase), larva (six-legged stase), protonymph (eight-legged stase), deutonymph (eight-legged stase), tritonymph (with paedogenesis, i.e. precocious development of sexual maturity). The respiratory role of the prelarva is emphasized. The current terminology of post-embryonic development is confusing as it pertains to three approaches: the state or form description, the instar standard and the stase paradigm.



    Photos: Varroa destructor (Varroidae) on a honey bee. Low temperature -Scanning electron microscopy photograph. Material collected and fixed for LT-SEM: J. Pettis, USDA-ARS-Bee Lab. and R. Ochoa, USDA-ARS-SEL; LT-SEM photo: E. Erbe and C. Pooley, USDA-ARS-CEMU © USDA; Petrobia harti (Tetranychidae) © INRA - Alain Migeon; Dermanyssus gallinae (Dermanysssidae) © Ecole Nationale Vétérinaire de Lyon – Lise Roy; Adult Ixodes sp. (Ixodidae) engorging on an Atlantic puffin Fratercula arctica © Andy Darrington; Panonychus ulmi (Tetranychidae): hatching of a winter egg © Université de Lausanne – Centre de microscopie électronique – Cazelles

    © 2009-2014 ACAROLOGIA. All rights reserved.