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 Insect Morphology and Systematics GYRINIDAE (Whirlinig beetles)Insect Morphology and Systematics 16248680811470158, Chin sevish Abdurauf Fitrat - 11.03.2016 16-14-20, 5 sinf 1-Mavzu Biologiya hayot haqidagi fan, 1-mavzu. Hasharotlar ekologiyasi fani rivojlanish tarixi4. GYRINIDAE (Whirlinig beetles)
They swim in erratic paths on water surface and exhibit gyrating moton.
Compound eyes are completely divided by the front margin of the head into an upper and
lower half so that the beetle appear to have two pairs of compound eyes. The dorsal pair
is suited for aerial vision and the ventral pair is for aquatic vision.
Forelegs are prehensile and long.
Middle legs and hindlegs are
natatorial
.
They are predators.
5. COCCINELLIDAE (Lady bird beetles)
They are hemispherical. The body is convex above and flat below.
Their body appearance resembles a split pea.
Head is small, turned downward and received into a prominent notch of prothorax.
Elytra is strongly convex, brightly coloured and variously spotted.
Grubs are compodeiform and spiny.
The last larval skin either cover the pupa or gets attached to the anal end of the pupa.
Except the genus
Epilachna
, others are predators on aphids, scales, mites and whiteflies.
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