REGENERATIVE MODIFICATIONS IN THE EXTERNAL STRUCTURE OF HALLER'S ORGAN IN NYMPHS OF IXODES RICINUS L. (ACARI: IXODIDAE)

About author:

Belozerov V. N., Biological Research Institute, St. Petersburg State University, Stary Peterhof, St. Petersburg, 198504, Russia

Acknowledgments:

The work was supported by the grant for research in natural sciences (the High Education State Committee of Russian Federation). A skillful help of Mr. A.R. Nesterov (Head of SEM Labora-tory, Faculty of Geology, St.Petersburg State University) is highly appreciated.

Annotation:

The structural modifications in regenerated Haller's sensory organ in nymphs of Ixodes (Ixodes) ricinus from which forelegs have been amputated at larval stage, are similar with those in nymphs of another prostriate tick, I.(Afrixodes) rubicundus. In both cases the nymphal regenerates reestablish larval features through a reduction of some sensilla in two compartments of the organ (on the distal knoll and in the post-capsular area). This juvenili-zation of Haller's organ is explained as a result of peculiarities in regenerative processes under hor-monal condition during larval-nymphal metamorphosis (high juvenile hormone content).

Bibliography:

Altner H. 1977. Insect sensillum specifity and structure: an approach to a new typology // In: Olfaction and Taste VI (J. Le Magnen and P.Macleod, eds.). London. P.295-303.

Balashov Yu.S., Leonovich S.A. 1978. [External structure of Haller's organ in ixodid ticks of the subfamily Ixodinae in connection with the systematics of this group] // Trudy Zool. Inst. Acad. Nauk SSSR. T.77. S.29-36. [In Russian]

Balashov Yu.S., Leonovich SA . 1981. [Structure and evolutionary pathways of Haller's organ in ticks of the subfamily Amblyomminae] // Parasitol. Sbornik. T.30. S.5-21. [In Russian]

Belozerov V.N. 1993. [Limb regeneration in ixodid ticks] // Parasitologiya. T.27. Vyp.2. P.177-185. [In Russian]

Belozerov  V.N.,  Leonovich  SA .  1995.  Pathways  of regeneration of Haller's sensory organ during the life cycle  of the tick  Hyalomma   asiaticum  //  J.  Exp. Zoology. Vol.271. №3.  P.196-204.

Belozerov V.N., Kok D.J., Fourie L.J. 1997. Regenera-tion of Haller's sensory organ in the tick Ixodes rubicundus // Exper. Appi. Acarology. Vol.21. №9. P.629-648.

Bulliere D., Bulliere F. 1985. Regeneration 11 In: Com - prehensive Insect Physiology, Biochemistry and Pharmacology (G.A.Kerkut and C.I.Gilbert, eds.). Pergamon Press, Oxford. Vol.2. P.371-424.

Hess E., Vlimant M. 1986. Leg sense organs of ticks // In: Morphology, Physiology and Behavioural Biology of Ticks (J.R.Sauer, J A.Hair, eds). J.Wiley & Sons, N-Y. P.361-390.

Homsher P.J., Sonenshine D.E. 1979. Scanning electron microscopy of ticks for systematic studies. 3. Struc-ture of Haller's organ in five species of the subgenus Multidentatus of the genus Ixodes // In: Recent advances in Acarology (J.G.Rodriguez, ed.). Acad.Press, N-Y. P.485-490.

Homsher P.J., Robbins R.G., Keirans J.E. 1991. Scan-ning electron microscopy of Haller's organ for subgeneric systematic studies in the genus Ixodes // In: Modern Acarology (F.Dusbabek, V.Bukva, eds.). Prague. Vol.2. P.335-342.

Leonovich S.A., Belozerov V.N. 1992. Regeneration of Haller's sensory organ in the tick Ixodes ricinus // Exper. Appi. Acarology. Vol.15. №1. P.59-79.

Leonovich S.A., Belozerov V.N. 1993. Metamorphosis of a complex sensory organ in ixodid ticks after regen-eration // In: Sensory Systems in Arthropods (K.Wiese et al., eds). Birkhauser Verlag, Basel. P.661-669. Wigglesworth V.B. 1972. The Principles of Insect Physiology. London.