Agriculture Reference
In-Depth Information
propodosoma and hysterosoma not separated by
a sejugal furrow. Notorious skin parasites of
birds and mammals.
EXAMPLE:
Sarcoptes scabiei
(itch mite), the
cause of scabies in man and sarcoptic mange in
various domestic and farm animals.
4. Family PSOROPTIDAE
Small, oval mites with distinctive bell-shaped
ambulacra, often borne on long stalks; males
with a pair of anal suckers. Primarily skin para-
sites of mammals.
EXAMPLE:
Psoroptes equi
(psoroptic mange
mite), the cause of cattle scab and sheep scab.
ORDER CRYPTOSTIGMATA (BEETLE MITES)
Adults usually heavily sclerotized and darkly col-
oured, the idiosoma with wing-like or ridge-like
expansions (the pteromorphs)
(Fig. 177);
chelicerae typically chelate and prominent,
sometimes with a long shaft; ocelli absent.
Most species are vegetarian and ground-
dwelling, inhabiting the leaf-litter layer; a few
species occur above ground on plants. Adults
0.2-1.5 mm long.
.
.'.' .
• •
•
, pteromorph
1. Family MYCOBATIDAE
(p. 270
et seq.)
, US': "
3 (V>
A
group of 'higher' cryptostigmatids in which,
during ecdysis, the cuticle splits along a line of
weakness around the sides of the hysterosoma;
idiosoma smooth; pteromorphs hinged; che-
licerae relatively short.
EXAMPLE:
Humerobates
rostrolamellatus
Fig. 177
A cherry beetle mite,
Humerobates
rostrolamellatus -
family Mycobatidae (x40).
(cherry beetle mite).
