Manual for Diagnosis of Screw-worm Fly - xcs consulting

Agriculture, Fisheries and Forestry - Australia
5. Powerful mouth hooks, robust larva extensively covered in black thorn-like spines,
anterior spiracles with 5+1 lobes (Fig. 26) ………………….……...Wohlfahrtia magnifica
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- Less robust larva without thorn-like spines ………………………....other Sarcophagidae
6. Posterior spiracle with peritreme complete (closed) or peritreme indistinct, button
within peritreme (G) ………….......................................................................……………7
- Peritreme open, button indistinct and in open area of peritreme (H) …………..…….. 10
7. Respiratory slits of posterior spiracles kidney shaped or very sinuous (G) …………..
...........................................................................................................................Muscidae
- Respiratory slits of posterior spiracles straight and roughly parallel (see H) …………..8
8. Accessory oral sclerite present between mouth hooks (I) (Fig. 28) …….............……….
..................................................................................................................Calliphora spp.
- No accessory oral sclerite (J)..........................................................................................9
9. Posterior spiracles round, small, peritreme thick and wide, slits short and wide (K),
concentration of black spines above anus (Fig. 27)..................................Lucilia cuprina
- Posterior spiracles pear-shaped (length greater than width), peritreme thinner and
narrower, slits longer and thinner (L), very few black spines above anus (Fig. 27).........
...............................................................................................…………….Lucilia sericata
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