Descriptions of the Larval Instars of Chrysomya rufifacies (Macquart) (Diptera: Calliphoridae), a Species of Forensic Importance in Malaysia
- Author:
Raja M. Zuha Raja Kamal
;
Mohamed Abdullah Marwi
;
John Jeffery
;
Ahmad Firdaus Mohd. Salleh
;
Wan Omar Abdullah
;
Baharuddin Omar
- Publication Type:Journal Article
- Keywords:
Forensic entomology, Chrysomya rufifacies, Larva instar
- From:Malaysian Journal of Health Sciences
2008;6(2):35-41
- CountryMalaysia
- Language:English
-
Abstract:
The anatomical structures of the first, second and third instars of Chrysomya rufifacies (Macquart) were examined by light microscopy. Observations were
documented on the three main characteristics; the cephalopharyngeal skeleton, anterior spiracle and posterior spiracle. The first instar larva bore cornuae of
fairly pigmented delineation with slim hypostomal sclerite and distinct dental sclerite. First instar did not have obscured anterior spiracle but posterior
spiracles were obscured with thin lining of opened peritreme. Intersegmental spines were evident. The second instar larva displayed a prominent anterodorsal
process approaching closer to hypostomal sclerite while upper margin of the dorsal cornua was slightly pigmented. Each anterior spiracle consisted of
nine to ten papillae, arranged in a single row. Peritreme of the posterior spiracle thick, opening at the end of peritreme was not wide and confined to
two spiracular slits. The third instar larva showed a prominent arch of the ventral cornua with broad and bold appearance. It approached the dorsal
cornua and became narrow at the incision median. The anterior spiracle consisted of a single row of nine to ten papillae while intersegmental spine
could be identified with one to three dark pigmented tips. A dark pigmented and wide periterime was observed confining three short and thick spiracular
slits while button was poorly pigmented. The most distinctive feature of this second and third instar larva was the slender, thorn-like tubercle with numerous
spined tips on the middle line segment of the body. These findings provide identification features of C. rufifacies larvae instars.
- Full text:W020150619355081807389.pdf
