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Journal of Experimental Biology 148,353-365 (1990)
Published by Company of Biologists 1990

External Design and Field of View of the Compound Eyes in a Raptorial Neuropteran Insect, Mantispa Styriaca

U. EGGENREICH 1 and K. KRAL 1

1 Institut für Zoologie, Karl-Franzens-Universität Universitätsplatz 2, A-8010 Graz, Austria

Visual fields and ommatidial angles of the compound eyes of Mantispa styriaca were determined using luminous pseudopupil and histological-anatomical techniques. The maximal horizontal overlap averaged 42.7° in femalesand 52.4° in males; females had only one overlap maximum, whereas males had two. In the dorsoventral direction, the binocular field had an overlap of 135.2° in the female and 142° in the male.

In light-adapted eyes, optical acceptance angles reached values of 2.0°, and they reached 3.6° with dark adaptation; interommatidial angles were between 1.8° and 2.3°. The angles were very similar over the entire eye; no acute zone was found in the frontal part of the eye, as the large binocular overlap would suggest. The results are compared with those for the praying mantis: this animal is in no way related to Mantispa but resembles it in appearance and capture behaviour.

Key words: compound eye, monocular field, binocular field, ommatidial angles

Accepted on September 26, 1989


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K Kral, M Vernik, and D Devetak
The visually controlled prey-capture behaviour of the European mantispid Mantispa styriaca
J. Exp. Biol., January 7, 2000; 203(14): 2117 - 2123.
[Abstract] [PDF]


© The Company of Biologists Ltd 1990