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Moths of Western North America$
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Jerry Powell and Philip Myers

Print publication date: 2009

Print ISBN-13: 9780520251977

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520251977.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 17 September 2021



(p.2) (p.3) Morphology
Moths of Western North America

Jerry A. Powell

Paul A. Opler

University of California Press

This chapter focuses on the morphology of adult and larval moths. The adult body framework consists of a hardened exoskeleton made up of a head, thorax, and abdomen. The head of an adult moth contains large compound eyes on the sides, antennae between them, and the mouthparts below, while the head of the larva is a round flattened structure characterized with lobes, bearing an ellipse of six simple eyes. The thorax of adult moths has three fused segments (pro-, meso-, and methathorax), each segment with legs and two pairs of wings in the middle and third segments. The thorax of larval moths is three-segmented with well-developed segmented true legs. The adult abdomen has 10 segments and segments 8 through 10 or 9 and 10 usually greatly modified to form external parts of the genitalia. In larval moths, the abdomen has 10 segments, with leglike organs on all segments.

Keywords:   morphology, moths, adult moths, larval moths, exoskeleton, head, thorax, abdomen, genitalia

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