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Prionus emarginatus
Classification
Diagnostic Features of Larvae
- Larva. Form cylindrical, slightly tapering posteriorly; integument very finely granulate, shining, sparsely clothed with lemon-yellow hairs. Head subrectangular, slightly constricted on sides behind gena and somewhat produced at base behind attachment of dorsal retractor muscles; epistoma projecting over clypeus in four prominent, flat, obtuse tubercles, the two median approximate; front scarcely projecting in a dull rounded transverse carina. Labrum transverse, subtrapezoidal, sparsely haired; mandibles robust, strongly curved on outer face (when seen from above), basal portion brownish, shining apical dull black, cutting edge straight, very little obliquely inclined, dorsal angle not strongly toothed; antennae three-jointed, first joint shortest, transverse, second globular, bearing the minute third. Ventral mouth-parts rather soft, fleshy, maxillary palpi conical, two basal joints transverse, last slightly larger, cylindrical, and bluntly round, about equal to last labial. Post condylar carina faint; subfossal spine acutely conical. Prothorax quadrangular. Anterior area of pronotum with transverse band of short hairs, posterior rugulose. Eusternum completely separated from presternum. Legs short, hairy, tarsus a slender spine. Abdominal ampullae rather prominently projecting. Pleural disc radially striate, distinct on first six abdominal segments. Spiracles rather small, oval, peritreme slightly chitinized. Pupa: Absolutely unarmed and pupates in an earthen cell. Egg: Elongate ovoid, 5 by 1-5 mm, largest beyond middle opposite micropyle, from which it gradually tapers to apex; texture firm, tough, strongly or finely pitted or honeycombed. Adapted from Craighead (1923).
Biology and Economic Importance
- Biology and economic importance for this taxon coming soon.
Selected References to Larvae Specimens
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