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Body vermiform (worm-like)
Demodex
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Body dorsoventrally flattened
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Setae on dorsal surface not feather-like
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Coxae close together on anterior part of body
Spiracles in middle of body lateral to coxae
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Genital plate well–defined (can be difficult to see)
External parasite
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Anal plate a rounded triangle
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Chelicerae with a single stylet
Usually on poultry
<< Prev Slide Dermanyssus
Chelicerae large with chelae (long, scissor–like structures on the end of the chelicerae)
Railletia
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On cats
Flap-like chitinous sternal extensions
<< Prev Slide Lynxacarus
On guinea pigs
Chirodiscoides
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Palpi with claws
Legs 3 & 4 separated from legs 1 & 2
Cheyletiella
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Coxae evenly spread around body
All legs short
Body disc like
<< Prev Slide Psorergates
Coxae 1 & 2 widely separated from coxae 3 & 4
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Posterior pairs of legs almost or completely concealed under abdomen
[Sarcoptidae]
<< Prev Slide Next >>
At least 3 pairs of legs projecting beyond abdomen
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Dorsum with stout spines and pointed triangular scales
Anus terminal
<< Prev Slide Sarcoptes
Dorsum with pointed triangular scales but no stout spines
Anus dorsal
On rodents (especially guinea pigs)
Trixacarus
Setae on dorsal surface not feather-like
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Very long setae on leg 3 (male) or legs 3 & 4 (female)
Anus dorsal
On mammals (especially cats or rodents)
<< Prev Slide Notoedres
No long setae either on legs 3 & 4
Parasitic on birds
Cnemidocoptes
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From nasal cavity of dogs
Peritreme short finishing between coxae 3 & 4
<< Prev Slide Peumonyssoides
In lungs of finches, canaries and other cage birds
No peritreme
Sternostoma
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Pedicels of tarsal suckers long and segmented
<< Prev Slide Psoroptes
Pedicels of tarsal suckers short and non-segmented
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MALE:
Prominent posterior lobes on tip of abdomen
Tarsal suckers on all legs
Leg 3 with 1 long seta
FEMALE:
Tarsal suckers on legs 1,2 & 4
Leg 3 with 2 long setae
<< Prev Slide Chorioptes
MALE:
No posterior lobes
Tarsal suckers on all legs
2 long setae on legs 3 & 4
FEMALE:
Tarsal suckers on legs 1 & 2
Leg 4 vestigal
Otodectes
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Anterior spiracles with 4 - 6 lobes
Chrysomya bezziana
Old World Screw Worm Fly
Not in Australia
Anterior spiracles with >10 lobes
Chrysomya sp
