Insectes Sociaux

, Volume 52, Issue 2, pp 122–131

Ultrastructural characterization of spermatozoa in euglossine bees (Hymenoptera, Apidae, Apinae)

  • U. Zama
  • J. Lino-Neto
  • S. M. Mello
  • L. A. O. Campos
  • H. Dolder
Research article

DOI: 10.1007/s00040-005-0789-x

Cite this article as:
Zama, U., Lino-Neto, J., Mello, S.M. et al. Insectes Soc. (2005) 52: 122. doi:10.1007/s00040-005-0789-x

Summary.

Euglossine spermatozoa are the longest described to date for the Hymenoptera. This cell includes a head and a flagellar region. In transverse sections, the acrosome is circular at the tip but has an oval contour along most of its length. The perforatorium penetrates into a deep cavity in the nuclear tip. The flagellum consists in an axoneme, a pair of mitochondrial derivatives, a centriolar adjunct and a pair of accessory bodies. The axoneme has a 9+9+2 microtubule pattern which becomes gradually disorganized in the final portion, with the central microtubules and the nine doublets terminating simultaneously, followed by the accessory microtubules. The mitochondrial derivatives are asymmetric both in length and diameter. Sectioned transversally, the derivatives are ellipsoidal or have a pear shape. The larger one has a more obvious paracrystalline region. The centriolar adjunct begins at the nuclear base and extends parallel to the axoneme until it encounters the smaller mitochondrial derivative, on which it fits, making a concave groove. In addition to these consistent euglossine features, species-specific differences that might be useful in phylogenetic work on the group are also noted.

Key words.

Ultrastructure spermatozoa Euglossini Apidae Hymenoptera 

Copyright information

© Birkhäuser Verlag, Basel 2005

Authors and Affiliations

  • U. Zama
    • 1
  • J. Lino-Neto
    • 2
  • S. M. Mello
    • 3
  • L. A. O. Campos
    • 2
  • H. Dolder
    • 1
  1. 1.Department of Cell Biology, Biology InstituteUNICAMPSão PauloBrazil
  2. 2.Department of General BiologyUFV, ViçosaMinas GeraisBrazil
  3. 3.Instituto ButantanSão PauloBrazil

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