Silkmoth larva about to moult
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Silkmoth larva about to moult
A larva (caterpillar) of the Saturnid moth Samia cynthia, about to undergo ecdysis, or moulting. The larvae of moths and butterflies increase in size by simple growth, punctuated by the casting off of the old skin following the production of a new one beneath it. Each new stage in the life of the larva is known as an instar. Commonly there are between 4 and 9 instars; the number being species-specific. The picture shows 4th instar larva of S. cynthia. The larva is hanging head down from a stem of common privet, Ligustrum vulgare. Ecdysis involves the withdrawal of the larva from its former outer skin, which splits, enabling the new instar to emerge. This process is just beginning, shown by the appearance of granular material on the (old) head (bottom right of the larva) and on its thoracic legs
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9223423
© DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY
Caterpillar Ecdysis Instar Larva Moulting Samia Cynthia Silkmoth Ligustrum Vulgare Privet
EDITORS COMMENTS
This print captures a mesmerizing moment in the life cycle of a silkmoth larva. The image showcases a caterpillar belonging to the Saturnid moth species, Samia cynthia, on the verge of undergoing ecdysis, commonly known as moulting. As these larvae grow, they shed their old skin and reveal a new one underneath. Each stage in this transformation is referred to as an instar. The photograph specifically displays a fourth instar larva of S. cynthia hanging upside down from a stem of common privet, Ligustrum vulgare. Ecdysis commences with the larva withdrawing itself from its previous outer covering that splits open to allow the emergence of the new instar. Intriguingly, granular material can be observed on both the head (located at the bottom right) and thoracic legs of this developing creature. This indicates that the process has just begun and adds an element of anticipation to this incredible natural phenomenon. Science Photo Library presents this stunning visual representation without any commercial intentions or affiliations. It provides viewers with an opportunity to marvel at nature's intricate processes and appreciate the beauty found within even seemingly mundane moments like moulting caterpillars.
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