We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Proboscis musculature in the butterfly Vanessa cardui (Nymphalidae, Lepidoptera): settling the proboscis recoiling controversy.
- Authors
Krenn, Harald W.
- Abstract
Abstract Krenn, H. W. 2000. Proboscis musculature in the butterfly Vanessa cardui (Nymphalidae, Lepidoptera): settling the proboscis recoiling controversy. —Acta Zoologica (Stockholm) 81: 259–266 The proboscis of Vanessa cardui (Nymphalidae) contains two basal galeal muscles and two different series of numerous oblique muscles. Both muscle series extend from the proximal region up to the tip-region; the individual muscles of each series run a constant course throughout the proboscis. In contrast to other butterflies, the knee bend region does not have additional types of muscles. The analysis of shock-frozen proboscises reveals that the dorsal wall is arched outwardly in the uncoiled, feeding position whereas in the coiled, resting position the dorsal proboscis wall is flat or concave. This results in a significantly greater cross-sectional area due to the significantly greater dorso-ventral diameter in uncoiled proboscises. After freezing the proboscis in its distal region, it can still be uncoiled, however, it cannot be fully recoiled. These morphometric and experimental results indicate that the oblique proboscis muscles are responsible for recoiling the proboscis to the resting position.
- Subjects
PAINTED lady (Insect); INSECT morphology; ANATOMY
- Publication
Acta Zoologica, 2000, Vol 81, Issue 3, p259
- ISSN
0001-7272
- Publication type
Article
- DOI
10.1046/j.1463-6395.2000.00055.x