Open Access

ARTICLE

Fine-structural details of the photoreceptor membranes in the ocellus of the scale-insect parasite Centrodora sp. (Hymenoptera; Aphenelidae): A case of gene transfer between host and parasite?

by MOUYU YANG, V.BENNO MEYER-ROCHOW

1. School of Engineering and Science, International University Bremen, D-28725 Bremen, Germany.
2. Department of Biology, University of Oulu, P.O.Box 3000, SF-90014 Oulu, Finland.
Address correspondence to: Dr. V.B. Meyer-Rochow. School of Engineering and Science, International University Bremen (IUB), P.O.Box 75 05 61, D-28725 Bremen, GERMANY. Fax: (+49-421) 200 3249. Tel: (+49-421) 200 3242. E-mail: b.meyer-rochow@iu-bremen.de

BIOCELL 2004, 28(2), 151-154. https://doi.org/10.32604/biocell.2004.28.151

Abstract

Only one insect (the scale insect Eriococcus sp.) is known, in which photoreceptive lamellae appear to have replaced the usual arthropod rhabdom microvilli. We are now reporting the presence of photoreceptive membranes, which also appear to resemble lamellae rather than microvilli, but they are in the ocellus of the tiny wasp Centrodora sp., which parasitizes scale insect eggs. The apparently optically homogenous lens of the Centrodora ocellus measures approximately 10 µm in diameter and, thus, operates at the limits of diffraction. We calculated that the lens is capable of focusing a parallel bundle of rays on the retina of the ocellus.

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