Observations of the third instar larva and puparium of Chrysomya bezziana (Diptera: Calliphoridae)

Observations on the ultrastructure of the third instar larva and puparium of the Old World screw-worm fly, Chrysomya bezziana, are presented utilizing both light microscopy (LM) and scanning electron microscopy (SEM). Results of this study indicate that the shape of the intersegmental spines between...

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Bibliographic Details
Published in:Parasitology research (1987) 2006-11, Vol.99 (6), p.669-674
Main Authors: SUKONTASON, K. L, PIANGJAI, S, BOONSRIWONG, W, BUNCHU, N, NGERN-KLUN, R, VOGTSBERGER, R. C, SUKONTASON, K
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Calliphoridae
Chrysomya
Chrysomya bezziana
Chrysomya megacephala
Chrysomya rufifacies
Diptera
Diptera - anatomy & histology
Diptera - growth & development
Diptera - ultrastructure
Fundamental and applied biological sciences. Psychology
General aspects
General aspects and techniques. Study of several systematic groups. Models
Humans
Insecta
Invertebrates
Larva - anatomy & histology
Larva - growth & development
Larva - ultrastructure
Lucilia cuprina
Microscopy, Electron, Scanning
Myiasis - parasitology
Pupa - anatomy & histology
Pupa - ultrastructure
Thailand
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Summary:Observations on the ultrastructure of the third instar larva and puparium of the Old World screw-worm fly, Chrysomya bezziana, are presented utilizing both light microscopy (LM) and scanning electron microscopy (SEM). Results of this study indicate that the shape of the intersegmental spines between the pro- and mesothorax markedly differ from other blow fly species (Chrysomya megacephala, Chrysomya rufifacies, Chrysomya nigripes, Lucilia cuprina) in being broad-based with sharp recurved tips. Other characters such as the posterior spiracles, number of papillae on the anterior spiracles, oral grooves, and posterior spiracular hairs also differ. The strong and robust mouthhooks may explain the ability of larvae to penetrate deeply into human tissues. Perforated sieve plates covered with antler-like projections were observed within the anterior spiracles of the puparium of C. bezziana. The posterior spiracular discs each bear three spiracular slits with approximately 2-microm wide openings that were viewed either open or closed by a membrane underneath. This study expands our knowledge of the fine details of the external morphology of both the third instar larva and puparium of C. bezziana, which is an obligatory myiasis-producing species in many regions. A key to differentiate the third instar of C. bezziana from other blow flies in Thailand is given.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-006-0233-9